期刊文献+
共找到1,174篇文章
< 1 2 59 >
每页显示 20 50 100
Residual alkali-evoked cross-linked polymer layer for anti-air-sensitivity LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)cathode
1
作者 Chao Zhao Xuebao Li +7 位作者 Yun Zhao Jingjing He Yuanpeng Cao Wei Luo Ding Wang Jianguo Duan Xianshu Wang Baohua Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第5期450-458,共9页
High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2),x≥0.8)show great promise in consumer electronics and vehicular applications.However,LiNi_(x)Co_(y)M... High-energy density lithium-ion batteries(LIBs)with layered high-nickel oxide cathodes(LiNi_(x)Co_(y)Mn_(1-x-y)O_(2),x≥0.8)show great promise in consumer electronics and vehicular applications.However,LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)faces challenges related to capacity decay caused by residual alkalis owing to high sensitivity to air.To address this issue,we propose a hazardous substances upcycling method that fundamentally mitigates alkali content and concurrently induces the emergence of an anti-air-sensitive layer on the cathode surface.Through the neutralization of polyacrylic acid(PAA)with residual alkalis and then coupling it with 3-aminopropyl triethoxysilane(KH550),a stable and ion-conductive cross-linked polymer layer is in situ integrated into the LiNi_(0.89)Co_(0.06)Mn_(0.05)O_(2)(NCM)cathode.Our characterization and measurements demonstrate its effectiveness.The NCM material exhibits impressive cycling performance,retaining 88.4%of its capacity after 200 cycles at 5 C and achieving an extraordinary specific capacity of 170.0 mA h g^(-1) at 10 C.Importantly,this layer on the NCM efficiently suppresses unfavorable phase transitions,severe electrolyte degradation,and CO_(2)gas evolution,while maintaining commendable resistance to air exposure.This surface modification strategy shows widespread potential for creating air-stable LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)cathodes,thereby advancing high-performance LIBs. 展开更多
关键词 Lithium-ion batteries Nickel-rich layered cathode Residual alkalis Cross-linked polyme rmodification Airsensitivity
下载PDF
An Experimental Study on Alkaline/Surfactant/Polymer Flooding Systems Using Natural Mixed Carboxylate 被引量:2
2
作者 牟建海 李干佐 李英 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2001年第2期162-166,共5页
Orthogonal-test-design method has been used to determine the optimal formula by phase behavior and interfacial tension studies, respectively. The effect of each component of two alkaline/surfactant/polymer flooding sy... Orthogonal-test-design method has been used to determine the optimal formula by phase behavior and interfacial tension studies, respectively. The effect of each component of two alkaline/surfactant/polymer flooding systems on interfacial tension is discussed, in which a low-price natural mixed carboxylate (SDC) is used as the major surfactant. The results indicate that the optimal composition is SDC (0.5%), alkaline NaHCO3/Na2CO3 with mass ratio of 1 (1.0%), and hydrolyzed polyacrylamide(0.1%). In the coreflood experiment, their oil recovery is increased by about 25.2% and 26.8% original oil in place, respectively. 展开更多
关键词 alkaline/surfactant/polymer flooding system natural mixed carboxylate interfacial tension phase behavior orthogonal-test-design
下载PDF
Rheological behavior of alkali-surfactant-polymer/oil emulsion in porous media
3
作者 雷征东 袁士义 宋杰 《Journal of Central South University》 SCIE EI CAS 2008年第S1期462-466,共5页
Based on deep analysis of ASP/oil emulsions flow behavior characteristic,a mathematical description of non-Newtonian emulsion was developed,and variation of rheological behaviors along the percolation flow direction w... Based on deep analysis of ASP/oil emulsions flow behavior characteristic,a mathematical description of non-Newtonian emulsion was developed,and variation of rheological behaviors along the percolation flow direction was given.The effects of emulsions rheological behavior on oil recovery were quantity researched by a 2-D positive rhythm profile geological model.The result shows that the high viscosity and reduction of water phase permeability by emulsification can improve low-middle layer flow rate and enhance sweep efficiency,and the enhancement degree is related with emulsification degree.The study result can be used as reference for scheme design and production performance forecast during ASP flooding. 展开更多
关键词 alkali-surfactant-polymer system EMULSION POROUS medium non-Newtonian fluid
下载PDF
Effect of nonionic surfactants in release media on accelerated in-vitro release profile of sirolimus eluting stents with biodegradable polymeric coating 被引量:3
4
作者 Ami Raval Pratap Bahadur Ankur Raval 《Journal of Pharmaceutical Analysis》 SCIE CAS CSCD 2018年第1期45-54,共10页
It is a well-known fact that sirolimus(SRL) undergoes degradation process via hydrolysis in aqueous media, leading to incorrect assessment of drug amount and thus release characteristics of formulations.The main objec... It is a well-known fact that sirolimus(SRL) undergoes degradation process via hydrolysis in aqueous media, leading to incorrect assessment of drug amount and thus release characteristics of formulations.The main objective of the present study was to evaluate the effect of nonionic surfactants in media on invitro release profiles for sirolimus eluting stents(SES) coated with biodegradable polymeric matrix.Phosphate buffer and acetate buffer incorporating nonionic surfactants with varying concentrations were examined for adequate solubility and stability(by RP-HPLC). Good sink condition was achieved in phosphate buffer(at pH 4.0) with 1.0% Tween 20, 1.0% Brij 35% and 0.5% Brij 58. Hydrodynamic size(by DLS) and the micelle-water partition coefficient(P) with standard free energy of solubilization(ΔGs°) of drug were evaluated to get some understanding about the solubilization phenomena. About 80% of drug release during the period of 48 h was achieved in optimized drug release media which was 1.0% Tween20 in phosphate buffer pH 4.0. The obtained accelerated SRL release profile in optimized medium correlated well with the real time in-vitro release in phosphate buffer(pH 7.4). Surface morphology changes(by SEM), changes in gravimetric weights and molecular weight change(by GPC) were examined before and after drug release to understand the drug release mechanism which explains that the polymer did not undergo degradation during the drug release. 展开更多
关键词 NONIONIC surfactant In-vitro RELEASE STENTS BIODEGRADABLE polymers
下载PDF
Effects of pore structure on surfactant/polymer floodingbased enhanced oil recovery in conglomerate reservoirs 被引量:2
5
作者 LIU Zheyu LI Yiqiang +3 位作者 LENG Runxi LIU Zhenping CHEN Xin HEJAZI Hossein 《Petroleum Exploration and Development》 2020年第1期134-145,共12页
To understand the displacement characteristics and remaining oil displacement process by the surfactant/polymer(SP) flooding in cores with different pore structures, the effects of pore structure on the enhanced oil r... To understand the displacement characteristics and remaining oil displacement process by the surfactant/polymer(SP) flooding in cores with different pore structures, the effects of pore structure on the enhanced oil recovery of SP flooding was investigated at the pore, core and field scales through conducting experiments on natural core samples with three typical types of pore structures. First, the in-situ nuclear magnetic resonance core flooding test was carried out to capture the remaining oil variation features in the water flooding and SP flooding through these three types of cores. Subsequently, at the core scale, displacement characteristics and performances of water flooding and SP flooding in these three types of cores were evaluated based on the full-size core flooding tests. Finally, at the field scale, production characteristics of SP flooding in the bimodal sandstone reservoir and multimodal conglomerate reservoir were compared using the actual field production data. The results show: as the pore structure gets more and more complex, the water flooding performance gets poorer, but the incremental recovery factor by SP flooding gets higher;the SP flooding can enhance the producing degree of oil in 1-3 μm pores in the unimodal and bimodal core samples, while it produces largely oil in medium and large pores more than 3 μm in pore radius in the multimodal core sample. The core flooding test using full-size core sample demonstrates that the injection of SP solution can significantly raise up the displacement pressure of the multimodal core sample, and greatly enhance recovery factor by emulsifying the remaining oil and enlarging swept volume. Compared with the sandstone reservoir, the multimodal conglomerate reservoir is more prone to channeling. With proper profile control treatments to efficiently enlarge the microscopic and macroscopic swept volumes, SP flooding in the conglomerate reservoir can contribute to lower water cuts and longer effective durations. 展开更多
关键词 CONGLOMERATE RESERVOIR PORE structure surfactant/polymer FLOODING DISPLACEMENT effect oil recovery enhancement
下载PDF
The effect of betaine surfactants on the association behavior of associating polymer 被引量:1
6
作者 Ji-Jiang Ge Tian-Ci Zhang +1 位作者 Yi-Ping Pan Xuan Zhang 《Petroleum Science》 SCIE CAS CSCD 2021年第5期1441-1449,共9页
The interfacial properties and rheological behavior of surfactant/polymer complex systems were measured to investigate the association behavior of the associating polymer.Compared with the pure surfactant solution,the... The interfacial properties and rheological behavior of surfactant/polymer complex systems were measured to investigate the association behavior of the associating polymer.Compared with the pure surfactant solution,there are two inflection points in the surface tension curve for the surfactant/polymer complex systems.The two inflection points are dependent on the surfactant type and polymer concentration.The effect of surfactant on the rheological behavior of polymer can be divided into two aspects.First,the addition of short-chain betaine surfactant is detrimental to the viscosity of polymer solution due to the electrostatic shielding effect.Second,long-chain betaine surfactant also reduces the viscosity of polymer solutions at low concentrations.However,when the concentration of the long-chain betaine surfactant is relatively high,the long-chain betaine surfactant could form worm-like micelles that promote the intermolecular association and thus increase the number of associating junctions,thereby resulting in the augmentation of viscosity.So it is necessary to apply the long-chain betaine surfactant to build the polymer/surfactant flooding system.The interaction model between surfactant and polymer is proposed,which is different from the traditional‘Three-Region Model’. 展开更多
关键词 Betaine surfactant Associating polymer Surface tension VISCOSITY Intermolecular association
下载PDF
Stabilization of nickel nanoparticle suspensions with the aid of polymer and surfactant: static bottle tests and dynamic micromodel flow tests 被引量:1
7
作者 Siyuan Yi Tayfun Babadagli Huazhou Li 《Petroleum Science》 SCIE CAS CSCD 2020年第4期1014-1024,共11页
Nickel nanoparticles can work as catalyst for the aquathermolysis reactions between water and heavy oil.A homogeneous and stable suspension is needed to carry the nickel nanoparticles into deeper reservoirs.This study... Nickel nanoparticles can work as catalyst for the aquathermolysis reactions between water and heavy oil.A homogeneous and stable suspension is needed to carry the nickel nanoparticles into deeper reservoirs.This study conducts a detailed investigation on how to achieve stabilized nickel nanoparticle suspensions with the use of surfactant and polymer.To stabilize the nickel nanoparticle suspension,three surfactants including sodium dodecyl sulfate,cationic surfactant cetyltrimethylammonium bromide and polyoxyalkalene amine derivative(Hypermer) along with xanthan gum polymer were introduced into the nickel nanoparticle suspension.Static stability tests and zeta potential measurements were conducted to determine the polymer/surfactant recipes yielding the most stable nickel nanoparticle suspensions.Dynamic micromodel flow tests were also conducted on three suspensions to reveal how the nickel nanoparticles would travel and distribute in porous media.Test results showed that when the injection was initiated,most nickel nanoparticles were able to pass through the gaps between the sand grains and produced in the outlet of the micromodel;only a small number of the nickel nanoparticles were attached to the grain surface.A higher nickel concentration in the suspension may lead to agglomeration of nickel nanoparticles in porous media,while a lower concentration can mitigate this agglomeration.Moreover,clusters tended to form when the nickel nanoparticle suspension carried an electrical charge opposite to that of the porous media.Follow-up waterflood was initiated after the nanofluid injection.It was found that the waterflood could not flush away the nanoparticles that were remaining in the micromodel. 展开更多
关键词 Aquathermolysis reactions Nickel nanoparticles polymer surfactant Suspension stability
下载PDF
Influence of Surfactant-polymer Complexes on Crystallization and Aggregation of CaCO_3 被引量:2
8
作者 PAN Yan GUO Yu-peng +1 位作者 ZHAO Xu WANG Zi-chen 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2012年第4期737-742,共6页
Hollow calcium carbonate(CaCO3) microspheres with different morphologies were synthesized via the precipitation reaction of calcium chloride with sodium carbonate in the presence of different surfactant-polymer comp... Hollow calcium carbonate(CaCO3) microspheres with different morphologies were synthesized via the precipitation reaction of calcium chloride with sodium carbonate in the presence of different surfactant-polymer complexes.The selected anionic surfactants were sodium dodecyl sulfonate(SDS) and sodium dodecyl benzenesulfonate(SDBS),respectively.The selected water-soluble polymers were polyacrylic acid(PAA) and polyvinyl pyrrolidone(PVP).In this work,SDS-PVP "pearl-necklace model" micellar complex was formed via hydrophobic effectiveness between SDS and PVP and it served as the spherical template to generate spherical CaCO3 aggregates with hollow microspheres composed of about 500 nm irregular shaped particles.SDS-PAA complexes and SDBS-PAA complexes formed "core-shell model" aggregates with calcium ions serving as the medium to link the anionic surfactant and the polymer.SDS-PAA "core-shell model" aggregates would act as templates for hollow CaCO3 microspheres consisting of 30―50nm irregular shaped crystallites.SDBS-PAA "core-shell model" aggregates served as the spherical aggregate templates to generate spherical CaCO3 aggregates consisted of many small spherical particles which had grown together.All the obtained CaCO3 hollow microspheres are calcite particles.This research may provide new insight into the control of morphologies of hollow CaCO3 microspheres in the presence of surfactantpolymer complexes. 展开更多
关键词 surfactant-polymer complex Calcium carbonate Hollow microsphere
下载PDF
XPS Study on Water-Soluble Polymer Surfactant Film
9
作者 Jian XU Liang He SHI Mei Ling YE (Polymer Physics Laboratory, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080) 《Chinese Chemical Letters》 SCIE CAS CSCD 1997年第11期0-0,共2页
By means of changing the detection angle, the molecular conformation of a new type of polymer surfactant, acrylamide-poly(oxyethykene alkyl ether)acrylate-anionic monomer random copolymer, was studied by x-ray photoel... By means of changing the detection angle, the molecular conformation of a new type of polymer surfactant, acrylamide-poly(oxyethykene alkyl ether)acrylate-anionic monomer random copolymer, was studied by x-ray photoelectron spectroscopy(XPS) in detail. 展开更多
关键词 XPS Study on Water-Soluble polymer surfactant Film
下载PDF
A SURFACTANT-ASSISTED APPROACH FOR PREPARING COLLOIDAL AZO POLYMER SPHERES WITH NARROW SIZE DISTRIBUTION
10
作者 王晓工 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2006年第4期431-436,共6页
A surfactant-assisted method for preparing colloidal spheres with narrow size distribution from a polydispersed azo polymer has been developed in this work. The colloidal spheres were formed through gradual hydrophobi... A surfactant-assisted method for preparing colloidal spheres with narrow size distribution from a polydispersed azo polymer has been developed in this work. The colloidal spheres were formed through gradual hydrophobic aggregation of the polymeric chains in THF-H2O dispersion media, which was induced by a steady increase in the water content. Results showed that the addition of a small amount of surfactant (SDBS) could significantly narrow the size distribution of the colloidal spheres. The size distribution of the colloidal spheres was determined by the concentrations of azo polymer and the amount of surfactant in the systems. When the concentrations of polymer and surfactant amount were in a proper range, colloidal spheres with narrow size distribution could be obtained. The colloidal spheres formed by this method could be elongated along the polarization direction of the laser beams to be a new type of the colloid-based functional materials. upon Ar^+ laser irradiation. The colloidal spheres are considered 展开更多
关键词 surfactant-assisted Narrow size distribution Colloidal sphere Azo polymer.
下载PDF
The Research of Complex System Property between Thermosensitive Polymer and Surfactant
11
作者 Chao Ma Gang Wan Tang Tang 《Journal of Energy and Power Engineering》 2015年第8期721-726,共6页
In this paper, the rigid structural thermosensitive polymer (made in lab) of NBS (N-butyl styrene), N, N-DEAM (diethyl acrylamide) and AM (acrylamide) was prepared. The influence of viscosity for copolymer sol... In this paper, the rigid structural thermosensitive polymer (made in lab) of NBS (N-butyl styrene), N, N-DEAM (diethyl acrylamide) and AM (acrylamide) was prepared. The influence of viscosity for copolymer solution under different reaction conditions such as temperatures and inorganic salt (monovalent salt and divalent salt) was analyzed. The experiment studies the combination of polymer situation and three different types of surfactants under certain conditions of the room temperature (25℃) and the formation temperature (76℃). At last, the influence of the surfactant kinds and concentration on the viscosity of the polymer solution are studied. The results show that: The copolymer solution, the apparent viscosity of which decreases with the increasement of temperature, but its viscosity has suddenly increased and thereafter dropped in the transition temperature. So the temperature sensitive effect ofcopolymer is very significantly. When the concentration of inorganic salt and surfactant can be controlled in certain extent, the copolymer solution, the effect increases with the increasement of the concentration, but the viscosity of which decreases with the increasement of shear rate. Shear rate can be controlled in certain extent, shearing stability properties of the copolymer solution are proved. 展开更多
关键词 Butyl styrene hydrophobic monomer solution properties thermosensitive polymer surfactant.
下载PDF
Wettability and surfactivity of sodium phosphate surfactants in strong alkali solutions 被引量:4
12
作者 陈胜慧 董金凤 《Journal of Central South University》 SCIE EI CAS 2010年第5期924-929,共6页
The wettability,surfactivity and the correlation between wettability and surfactivity of sodium diethylhexylphosphate,sodium diethylhexyl polyoxyethylene phosphate and their complex in NaOH solutions were studied.A co... The wettability,surfactivity and the correlation between wettability and surfactivity of sodium diethylhexylphosphate,sodium diethylhexyl polyoxyethylene phosphate and their complex in NaOH solutions were studied.A complex alkali resistant phosphate surfactant with good permeability was prepared.The wettability of surfactants was investigated by measuring the immersion time,sinking time and capillary effects of nature cotton grey fabric in NaOH solutions.The surfactivity of the surfactants was characterized by measuring the surface tension.The effect of the complex on the surface appearance of cotton grey fabric was also investigated with a scanning electron microscope(SEM) .The results show that all the surfactants exhibit good wettability for cotton grey fabric in 0.5-5.0 mol/L of NaOH solutions,the complex system exhibits better wettability in 5.0-7.0 mol/L of NaOH solutions,in comparison with either corresponding single surfactant component employed,and wettability is well correlative with the surfactivities of the surfactant.SEM images indicate that the cotton grey fabric is well wetted by the alkaline surfactant solution and the quality of fabric is improved. 展开更多
关键词 sodium diethylhexylphosphate sodium diethylhexyl polyoxyethylene phosphate WETTABILITY surfactivity alkali surfactant
下载PDF
Temperature effect on the dynamic adsorption of anionic surfactants and alkalis to silica surfaces 被引量:1
13
作者 Marco Masulli Zi-Long Liu +3 位作者 Feng-Zhi Guo Xue Li Ernst J.RSudholter Naveen Kumar 《Petroleum Science》 SCIE CAS CSCD 2022年第4期1866-1876,共11页
Chemical loss such as surfactants and alkalis by adsorption to reservoir rock surface is an important issue in enhanced oil recovery(EOR). Here, we investigated the adsorption behaviors of anionic surfactants and alka... Chemical loss such as surfactants and alkalis by adsorption to reservoir rock surface is an important issue in enhanced oil recovery(EOR). Here, we investigated the adsorption behaviors of anionic surfactants and alkalis on silica for the first time as a function of temperature using quartz crystal microbalance with dissipation(QCM-D). The results demonstrated that the temperature dependent critical micelle concentration of alcohol alkoxy sulfate(AAS) surfactant can be quantitatively described by the thermodynamics parameters of micellization, showing a mainly entropy-driven process. AAS adsorption was mediated under varying temperature conditions, by divalent cations for bridging effect, monovalent cations competitive for adsorption sites but not giving cation bridging, pH regulation of deprotonated sites of silica, presence of alkoxy groups in the surfactants, and synergistic effect of surfactant coinjection. The addition of organic alkalis can enhance the overall adsorption of the species with AAS,whereas inorganic alkali of Na_(2)CO_(3) had capability of the sequestration of the divalent ions, whose addition would reduce AAS adsorption. The typical AAS adsorption indicated a non-rigid multilayer,estimated to have between 2 and 5 layers, with a likely compact bilayer followed by disorganized and unstable further layering. The new fundamental understanding about temperature effect on surfactants and alkalis adsorption contributes to optimizing the flooding conditions of chemicals and developing more efficient mitigation strategies. 展开更多
关键词 TEMPERATURE surfactant alkali ADSORPTION Enhanced oil recovery
下载PDF
Study on Optimization of Polymer Enhanced Foam Formulation System
14
作者 Meinan Wang Yuejie Wang +2 位作者 Hongyou Zhang Xiaoyan Yang Xiaoming Chen 《Engineering(科研)》 2023年第11期742-748,共7页
Taking the pilot test area of polymer enhanced foam flooding in Y oilfield as the prototype, a numerical core model was established, and the polymer enhanced foam formulation system was optimized by analyzing the resi... Taking the pilot test area of polymer enhanced foam flooding in Y oilfield as the prototype, a numerical core model was established, and the polymer enhanced foam formulation system was optimized by analyzing the resistance factor and the change rule of oil recovery of different formulation systems. Research shows that the higher the polymer concentration, the greater the resistance factor, and the more obvious the sealing effect formed in the formation. The concentration of surfactant has a greater impact on the resistance factor. With the increase of surfactant concentration, the resistance factor increases significantly, and the plugging effect of foam agent on core is significantly enhanced. With the increase of gas-liquid ratio, the resistance factor first increases and then decreases. When the gas-liquid ratio is 1:1, the resistance is the largest, and the foam agent has the strongest plugging effect on the core. The optimal formula system of polymer enhanced foam flooding in Y oilfield is: polymer concentration is 1200 mg/L, surfactant concentration is 0.25 wt%, gas-liquid ratio is 1:1. 展开更多
关键词 Enhanced Foam polymer Concentration surfactant Concentration Gas-Liquid Ratio
下载PDF
Research on Influence Factors of Surfactivity of Polyester Polyether Block Copolymer
15
作者 吴明华 林鹤鸣 《Journal of Donghua University(English Edition)》 EI CAS 2008年第1期19-23,共5页
Polyester polyether block copolymer (PPBC) was synthesized by ester-exchange and polycondensation reactions using dimethyl terephthalate (DMT), ethylene glycol (EG) and polyethylene glycol (PEG) as monomer. Th... Polyester polyether block copolymer (PPBC) was synthesized by ester-exchange and polycondensation reactions using dimethyl terephthalate (DMT), ethylene glycol (EG) and polyethylene glycol (PEG) as monomer. The effects of PEG molecular weight, mol ratio of DMT to PEG (nDMT/nPEG), temperature and time of polycondensation reaction and vacuum degree in the reaction system on the surface tension and critical micelle concentration (CMC) of PPBC aqueous solution were studied. It was found that both the molecular weight and the concentration of PEG can affect PPBC's surface activity obviously, and the optimum synthesis condition of PPBC used as surfactant is as follows: PEG molecular weight is 1 500, tool ratio of DMT to PEG is 3, temperature and time of polycondensation reaction is 260℃ × 1 h, vacuum degree of condensation reaction is 0.03-0.05 MPa. It was proved by surface tension measurement of PPBC aqueous solution that the PPBC synthesized in this condition is a good surfactant with excellent surfactivity. 展开更多
关键词 polymer surfactant polyethylene glycol surfactivity POLYCONDENSATION
下载PDF
Lessons learned from coreflood experiments with surfactant-polymer and alkali-surfactant-polymer for enhanced oil recovery 被引量:1
16
作者 Ivan Kurnia Muhammad Fatchurrozi +1 位作者 Riyaz Ghulam Anwary Guoyin Zhang 《Petroleum》 EI CSCD 2023年第4期487-498,共12页
A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)processes.The objective of this review is to g... A review of coreflood experiments for chemically enhanced oil recovery(EOR)is presented in this paper,particularly surfactant-polymer(SP)and alkali-surfactant-polymer(ASP)processes.The objective of this review is to gain a general outlook and insight from coreflood experiments injecting SP or ASP slug as tertiary recovery.The discussion is separated into sections based on relevant core and fluid properties as well as surfactant selection and SP/ASP slug design and their impact on incremental recovery.Most studies in this review have been published within the last twenty years but few older coreflood works have been included for benchmarking.Parameters in each reviewed study have been summarized in tables to help readers gain detailed observation.Lessons learned from these past experiments should help other chemical EOR practitioners or students of the field in benchmarking or improving the outcomes of their future SP/ASP experiments. 展开更多
关键词 Enhanced oil recovery surfactant polymer alkali Coreflood
原文传递
EFFECTS OF NH_4Cl ON THE INTERACTION BETWEEN POLY(ETHYLENE OXIDE) AND IONIC SURFACTANTS IN AQUEOUS SOLUTIONS 被引量:3
17
作者 Li, Jing Li, Hua-zhen +2 位作者 Yang, Hai-yang Zhu, Ping-ping He, Ping-sheng 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第1期31-37,共7页
The interaction of poly(ethylene oxide)(PEO)with the ionic surfactants,sodium dodecylsulfate(SDS)and cetyltrimethylammonium chloride(CTAC)respectively,in aqueous solutions containing a certain concentration of NH_4Cl,... The interaction of poly(ethylene oxide)(PEO)with the ionic surfactants,sodium dodecylsulfate(SDS)and cetyltrimethylammonium chloride(CTAC)respectively,in aqueous solutions containing a certain concentration of NH_4Cl, is studied by the viscosity measurement.It has been found that the ion-dipole interaction between PEO and ionic surfactants is changed considerably by the organic salt.For anionic suffactant of SDS,the addition of NH_4Cl into solution strengthens the interaction between PEO and the headgroup o... 展开更多
关键词 VISCOSITY Ion-dipole interaction Non-ionic polymer Ionic surfactant NH_4Cl
下载PDF
Enhancement of Formation of Polar Microenvironment in Polymer by Compressed CO_(2)
18
作者 Rui ZHANG Jun HE +2 位作者 Jun LIU Bu Xing HAN Guan Ying YANG 《Chinese Chemical Letters》 SCIE CAS CSCD 2002年第9期901-902,共2页
The copolymer (EO)22(PO)52(EO)22 in p-xylene can solubilize much more water in the presence of compressed CO2 than the case without CO2.
关键词 Reverse micelles polymer surfactant carbon dioxide.
下载PDF
SIPOLYMER高性能聚合物涂料在氯碱生产装置中的应用
19
作者 刘群 刘薇 《全面腐蚀控制》 2014年第6期33-36,共4页
本文简要阐述了氯碱生产装置的腐蚀介质环境、SIPOLYMER陶瓷涂料的防腐特性和在氯碱生产装置中的实际应用。
关键词 腐蚀介质环境 陶瓷聚合物 涂料 氯碱 防腐应用
下载PDF
Carbon Fibre Reinforced Concrete: Dependency of Bond Strength on T<sub>g</sub>of Yarn Impregnating Polymer
20
作者 Iris Kruppke Marko Butler +3 位作者 Kai Schneider Rolf-Dieter Hund Viktor Mechtcherine Chokri Cherif 《Materials Sciences and Applications》 2019年第4期328-348,共21页
In this paper, a method for the evaluation of the influence of different polymer suspensions and environmental conditions on adhesion between an impregnated carbon fibre heavy tow and concrete for reinforcement will b... In this paper, a method for the evaluation of the influence of different polymer suspensions and environmental conditions on adhesion between an impregnated carbon fibre heavy tow and concrete for reinforcement will be proposed. For this purpose, the impregnation material itself was investigated as a polymer film before and after incubation in water and aqueous suspensions, such as NaOH and a cementitious solution, in terms of its thermal properties, swelling behaviour and morphology. Thin polymer films were manufactured and subsequently investigated with quantification of the swelling for 28 d by thermal and scanning electron microscope analysis. The effect of pull-out shear stress was evaluated to investigate parameters such as high temperature and moisture on adhesion to concrete. Contact angle measurements were used to determine the surface energy of the polymer films. All incubated polymer films yielded a change in both surface morphology and specific residues on the polymer film surface, e.g. in the form of calcium carbonate, but no change in glass-transition temperature. A high correlation between glass-transition temperature and measured shear stress was shown during single yarn pull-out tests. Furthermore, the water treatment of pull-out samples strengthened the influence for the glass-transition temperature during the adhesion test. No influence of the surface energy of the used polymer impregnation for carbon fibres on the pull-out test was detected. 展开更多
关键词 Carbon Fibre Concrete alkali RESISTANCE THERMO-MECHANICAL RESISTANCE polymer Coating
下载PDF
上一页 1 2 59 下一页 到第
使用帮助 返回顶部