Janus粒子的表面改性及其对共混聚合物的增容性能研究  

Surface modification of Janus particles and their compatibilization in polymer blends

作　　者：梁新铖 张操 贺爱华[1] 聂华荣 Xincheng Liang;Cao Zhang;Aihua He;Huarong Nie(Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics （Ministry of Education）, School of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, Chin)

机构地区：[1]山东省烯烃催化与聚合重点实验室,橡塑材料与工程教育部重点实验室,青岛科技大学高分子科学与工程学院,青岛266042

出　　处：《中国科学：化学》2018年第5期527-534,共8页SCIENTIA SINICA Chimica

基　　金：国家自然科学基金(编号：51773105,51473083); 山东省自然科学基金(编号：ZR2016EMM05); 国家重点基础研究发展计划(编号：2015CB654700,2015CB354706); 山东省重大基础研究项目(编号：ZR2017ZA0304); 泰山学者工程项目资助

摘　　要：本文以雪人状的SiO_2@PDVB Janus粒子为模板,通过表面改性获得具有不同表面性质的Janus粒子,包括在SiO_2半球分别引入聚丁二烯(PBd)与聚异戊二烯(PI),以增加SiO_2@PDVB Janus粒子中无机的SiO_2半球对聚合物基质的亲和性.随后将改性前后的Janus粒子分散到聚苯乙烯(PS)/顺丁橡胶(PBd)及聚苯乙烯(PS)/异戊橡胶(PI)的共混体系中,考察了不同Janus粒子对共混物相结构的影响.结果发现,与未改性的Janus粒子相比,引入聚合物刷的Janus粒子可更有效地提高其界面增容效果,抑制共混物相分离的动力学.Janus particles with biphasic polymer brushes are promising as compatibilizers in biphasic systems due to the combination of both the particle core and the amphiphilic properties of the two compartment faces. As the traditional colloid particles, the compatibilization efficiency of Janus particles also scales with the increased amphiphilicity of particles by both phases and the enlarging of the interfacial tension aside from the increase in the radius of the particles.Meanwhile, the interfacial tension between the demixing polymer liquids is quite low, therefore a precise control over the surface chemistry of particles is absolutely necessary for the improved accomodation of particles by polymer blends and the compatibilization efficiency. In this paper, the Janus particles with rubber brushes（polybutadiene, PBdSiO2@PDVB; polyisoprene, PI-SiO2@PDVB） are synthesized by surface modification on a snowman like Janus particle（SiO2@PDVB） template, from which PBd and PI brushes are previously synthesized by anionic polymerization,followed by their covalently attached onto SiO2 surface of JP cores. Adding such modified Janus particles into polystyrene（PS）/PI or PS/PBd blends enables offsetting to some extent the stronger interaction between PS phases and PDVB hemispheres. Resultantly, PBd-SiO2@PDVB and PI-SiO2@PDVB particles character as the better efficiency in compatibilization than SiO2@PDVB particles, which reflected as the smaller PS phase distributed in the rubber matrix.It is expected this article could contribute to the advances in the application of Janus particles in polymer blends.

关 键 词：Janus粒子 表面改性 增容 聚合物共混物 

分 类 号：TQ314.24[化学工程—高聚物工业]