摘要
采用悬浮聚合法制备高分子聚羧酸-纳米Fe3O4磁性复合颗粒（PC-NMPs）。通过热重差热分析（TGA）、有机元素分析（EA）、原子吸收光谱（AAS）、X-射线衍射（XRD）、红外光谱（IR）、透射电镜（TEM）、振动样品磁强计（VSM）对合成的磁性复合颗粒进行了组成、结构、形貌、磁性等表征,并研究了其吸附和去除水中对羟基苯甲酸酯类化合物（Parabens）的性能。结果表明：合成的磁性复合颗粒平均粒径为100~150 nm,饱和磁化强度为10.66 emu/g,剩余磁化强度为0.61 emu/g,矫顽力为14.96 Oe;该磁性复合颗粒对4种常用的对羟基苯甲酸酯类化合物（Parabens）的等温吸附线基本符合Langmuir模式,对羟基苯甲酸甲酯（MPB）、对羟基苯甲酸乙酯（EPB）和对羟基苯甲酸丙酯（PPB）的饱和吸附量为556 mg/g;对羟基苯甲酸丁酯（BPB）的饱和吸附量为588 mg/g。该复合颗粒能有效去除水中对羟基苯甲酸甲酯类化合物,是潜在的环境激素吸附剂和去除剂。该复合颗粒表面富含羧基可与Parabens类化合物形成氢键、苯环间存在π-π相互作用,有利于吸附过程快速有效地进行。
The polycarboxylate - nano Fe3O4 magnetic particles （PC - NMPs） were synthesized via suspension polymerization. The PC-NMPs were characterized by IR, EA, AAS, TGA, XRD, TEM and VSM. Their application to the adsorption of parabens from water was investigated. The results show that these PC NMPs have an average size of 100~150 nm, with saturation magnetization intensity of 10.66 emu/g, and residual magnetization intensity of 0. 61 emu/g and coercive force of 14.96 Oe, respectively. The adsorption capacities were investigated by adsorbing 4 kinds of commonly used parabens from aqueous solution, which demonstrates an excellent adsorption capacity of 556 mg/g for methylparaben （MPB）, ethylparaben （EPB）, propyl paraben （PPB） and 588 mg/g for butyl paraben （BPB）, respectively. The isothermal adsorption curves mainly obey the Langmuir mode. The PC- NMPs can be used as the potential sorbents for the removal of parabens, the important kinds of environmental hormones from wastewater. Primary mechanism studies reveal that the adsorption process can be carried out quickly and efficiently, which may be due to the hydrogen bonds and π-π interactions between parabens and the PC- NMPs.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2009年第4期68-73,共6页
Acta Materiae Compositae Sinica
基金
有机功能分子合成与应用教育部重点实验室资助项目(2007-KL-2007)
浙江省科技基础条件平台研究项目(2007F0045)
宁波市自然科学基金(2009A610002)
