双重磁响应复合微球的制备及吸附性能研究  

Synthesis and adsorption properties of composite microsphere with dual-magnetic responses

作　　者：蔡力锋[1,2] 王春丽[1] 林旺[1] 吴丁财[2] 

机构地区：[1]莆田学院环境与生物工程学院∥福建省新型污染物生态毒理效应与控制重点实验室,福建莆田351100 [2]中山大学化学与化学工程学院∥材料科学研究所∥聚合物复合材料及功能材料教育部重点实验室,广东广州510275

出　　处：《中山大学学报（自然科学版）》2016年第4期75-80,共6页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(51422307;51372280);福建省科技厅对外合作资助项目(2015I0014);福建省教育厅科技资助项目(JK2014043);广东省自然科学杰出青年基金资助项目(S2013050014408);广东特支计划科技创新青年拔尖人才资助项目(2014TQ01C337);中山大学聚合物复合材料及功能材料教育部重点实验室开放课题资助项目(PCFM-2015-01)

摘　　要：采用种子乳液聚合法制备了Fe3O4@P(NIPAM-co-St)温敏复合微球。利用透射电镜、红外光谱仪、Zeta粒度分析仪、热重分析仪和振动样品磁力计对微球结构进行了表征,通过紫外-可见光分光光度法研究了微球对模型有机物罗丹明B(Rh B)的吸附和磁感应脱附再生行为。结果表明,复合微球呈现多核壳结构,增加聚合体系疏水单体苯乙烯(St)用量,微球中Fe3O4含量和饱和磁感应强度降低;微球中引入适量疏水聚苯乙烯(PS)链段可以提高其对Rh B的吸附量,且酸性条件有利于微球对Rh B的吸附,吸附量可达13.31 mg/g;吸附Rh B的微球在交变磁场作用下的脱附量相对于室温条件明显提高,且微球经过5次使用后,其吸附量仍然可达8.82 mg/g,说明该微球具有良好的双重磁响应特性(磁分离响应和磁感应脱附再生)。Seed emulsion polymerization was carried out to fabricate a novel class of thermo-sensitive Fe3O4@ poly（ N-isopropylacrylamide-co-styrene） composite microspheres（ Fe3O4@ P（ NIPAM-co-St））.The structures of the as-prepared composite microspheres were characterized by TEM,FTIR,DLS,TGA and VSM. UV-Vis was employed to investigate the adsorption and magnetic-induced desorption behaviors using Rhodamine B（ Rh B） as a model molecule. The results indicated that the composite microspheres possessed a unique multi-core-shell structure. The magnetic nanoparticle content and saturation magneticinduction intensity of microspheres decreased with an increase of the St content during polymerization.Rh B adsorption performance was improved when a proper amount of hydrophobic St comonomer was introduced into microspheres. The composite microspheres showed a high Rh B adsorption capacity of up to13. 31 mg / g under an acid condition. As compared with the free desorption under room temperature,much more Rh B on the composite microspheres could be desorbed under alternating magnetic field. The adsorption capacity of composite microsphere still achieved 8. 82 mg / g after five adsorption / desorption cycles,indicating good dual-magnetic responses（ magnetic separation and magnetic-induced desorption）.

关 键 词：复合微球 温敏 双重磁响应 吸附 再生 

分 类 号：TB381[一般工业技术—材料科学与工程]