A couple of novel sulfobetaine copolymer is developed via Michael-type addition reaction. The comonomers, diamines and maleimide react via Michael reaction through UV irradiation using AIBN as photoinitiator producing...A couple of novel sulfobetaine copolymer is developed via Michael-type addition reaction. The comonomers, diamines and maleimide react via Michael reaction through UV irradiation using AIBN as photoinitiator producing polyamine chain. Further, sulfobetaine copolymers were obtained on treatment of the polyamine with sulfopropylating agent, 1,3-propane sultone. These novel sulfobetaine polymers were grafted on silica surface to produce responsive biocompatible surface. This easy straightforward, catalyst free facile protocol for synthesis of polymer grafted surface is useful for developing biomedical devices. Additionally, both the copolymers show fluorescence characteristics.展开更多
Zwitterionic sulfobetaine-based monolithic stationary phases have attracted increasing attention for their use in hydrophilic interaction chromatography.In this study,a novel hydrophilic polymeric monolith was fabrica...Zwitterionic sulfobetaine-based monolithic stationary phases have attracted increasing attention for their use in hydrophilic interaction chromatography.In this study,a novel hydrophilic polymeric monolith was fabricated through photo-initiated copolymerization of 3-(3-vinyl-1-imidazolio)-1-propanesulfonate(SBVI)with pentaerythritol triacrylate using methanol and tetrahydrofuran as the porogenic system.Notably,the duration for the preparation of this novel monolith was as little as 5 min,which was significantly shorter than that required for previously reported sulfobetaine-based monoliths prepared via conventional thermally initiated copolymerization.Moreover,these monoliths showed good morphology,permeability,porosity(62.4%),mechanical strength(over 15 MPa),column efficiency(51,230 plates/m),and reproducibility(relative standard deviations for all analytes were lower than 4.6%).Mechanistic studies indicated that strong hydrophilic and negative electrostatic interactions might be responsible for the retention of polar analytes on the zwitterionic SBVI-based monolith.In particular,the resulting monolith exhibited good anti-protein adhesion ability and low nonspecific protein adsorption.These excellent features seem to favor its application in bioanalysis.Therefore,the novel zwitterionic sulfobetaine-based monolith was successfully employed for the highly selective separation of small bioactive compounds and the efficient enrichment of N-glycopeptides from complex samples.In this study,we prepared a novel zwitterionic sulfobetaine-based monolith with good performance and developed a simpler and faster method for preparation of zwitterionic monoliths.展开更多
On the molecular level, it is believed that polymers containing zwitterionic structures should be compatible with blood. In this work polyurethane films were grafted with sulfobetaine by a three-step procedure. In the...On the molecular level, it is believed that polymers containing zwitterionic structures should be compatible with blood. In this work polyurethane films were grafted with sulfobetaine by a three-step procedure. In the first step, the films'surfaces were treated with hexamethylene diisocyanate (HDI) in toluene at 50℃ in the presence of di-n-butyl tin dilaurate (DBTDL) as a catalyst. The extent of the reaction was monitored by ATR-IR spectra; a maximum number of free NCO groups was obtained after a reaction time of 90 min. In the second step, the hydroxyl groups of N,Ndimethylethylethanolamine (DMEA) were allowed to react in toluene with NCO groups bound on the surface. In the third step, sulfobetaines were formed on the surface through the ring-opening reaction between tertiary amine of DMEA and 1,3-propanesultone (PS). The surfaces of the films were characterized by ATR-IR and XPS showing that the grafted surfaces were composed of sulfobetaine. The results of the contact angle measurement show that the surface was strongly hydrophlic.The platelet adhesion test demonstrated that the films grafted with sulfobetaine have excellent blood compatibility.展开更多
A kind of sulfobetaine, N,N-dimethyl-N-(3- sulfopropyl )-4-ethen yl-benzenemethanaminium inner salt was synthesized from tertiary amine and propanesultone and characterized by IR a nd 1 H NMR . The blood compatibiliti...A kind of sulfobetaine, N,N-dimethyl-N-(3- sulfopropyl )-4-ethen yl-benzenemethanaminium inner salt was synthesized from tertiary amine and propanesultone and characterized by IR a nd 1 H NMR . The blood compatibilities of the polymers were evaluate d by platelet adhesion method. No platelet adhesion in platelet rich plasma(PRP) was observed for two hours.展开更多
文摘A couple of novel sulfobetaine copolymer is developed via Michael-type addition reaction. The comonomers, diamines and maleimide react via Michael reaction through UV irradiation using AIBN as photoinitiator producing polyamine chain. Further, sulfobetaine copolymers were obtained on treatment of the polyamine with sulfopropylating agent, 1,3-propane sultone. These novel sulfobetaine polymers were grafted on silica surface to produce responsive biocompatible surface. This easy straightforward, catalyst free facile protocol for synthesis of polymer grafted surface is useful for developing biomedical devices. Additionally, both the copolymers show fluorescence characteristics.
基金supported by the National Natural Science Foundation of China(Grant Nos.:82173773 and 82073806)the Natural Science Foundation of Guangdong Province,China(Grant Nos.:2020A1515010569 and 2021A0505030039)Science and Technology Program of Guangzhou,China(Grant No.:202102020729).
文摘Zwitterionic sulfobetaine-based monolithic stationary phases have attracted increasing attention for their use in hydrophilic interaction chromatography.In this study,a novel hydrophilic polymeric monolith was fabricated through photo-initiated copolymerization of 3-(3-vinyl-1-imidazolio)-1-propanesulfonate(SBVI)with pentaerythritol triacrylate using methanol and tetrahydrofuran as the porogenic system.Notably,the duration for the preparation of this novel monolith was as little as 5 min,which was significantly shorter than that required for previously reported sulfobetaine-based monoliths prepared via conventional thermally initiated copolymerization.Moreover,these monoliths showed good morphology,permeability,porosity(62.4%),mechanical strength(over 15 MPa),column efficiency(51,230 plates/m),and reproducibility(relative standard deviations for all analytes were lower than 4.6%).Mechanistic studies indicated that strong hydrophilic and negative electrostatic interactions might be responsible for the retention of polar analytes on the zwitterionic SBVI-based monolith.In particular,the resulting monolith exhibited good anti-protein adhesion ability and low nonspecific protein adsorption.These excellent features seem to favor its application in bioanalysis.Therefore,the novel zwitterionic sulfobetaine-based monolith was successfully employed for the highly selective separation of small bioactive compounds and the efficient enrichment of N-glycopeptides from complex samples.In this study,we prepared a novel zwitterionic sulfobetaine-based monolith with good performance and developed a simpler and faster method for preparation of zwitterionic monoliths.
基金Project of 973 State key Foundation Research and Development (No. 1999064705) sponsored and supported by Ministry of Science and Technology of China.
文摘On the molecular level, it is believed that polymers containing zwitterionic structures should be compatible with blood. In this work polyurethane films were grafted with sulfobetaine by a three-step procedure. In the first step, the films'surfaces were treated with hexamethylene diisocyanate (HDI) in toluene at 50℃ in the presence of di-n-butyl tin dilaurate (DBTDL) as a catalyst. The extent of the reaction was monitored by ATR-IR spectra; a maximum number of free NCO groups was obtained after a reaction time of 90 min. In the second step, the hydroxyl groups of N,Ndimethylethylethanolamine (DMEA) were allowed to react in toluene with NCO groups bound on the surface. In the third step, sulfobetaines were formed on the surface through the ring-opening reaction between tertiary amine of DMEA and 1,3-propanesultone (PS). The surfaces of the films were characterized by ATR-IR and XPS showing that the grafted surfaces were composed of sulfobetaine. The results of the contact angle measurement show that the surface was strongly hydrophlic.The platelet adhesion test demonstrated that the films grafted with sulfobetaine have excellent blood compatibility.
文摘A kind of sulfobetaine, N,N-dimethyl-N-(3- sulfopropyl )-4-ethen yl-benzenemethanaminium inner salt was synthesized from tertiary amine and propanesultone and characterized by IR a nd 1 H NMR . The blood compatibilities of the polymers were evaluate d by platelet adhesion method. No platelet adhesion in platelet rich plasma(PRP) was observed for two hours.
