具有二氧化碳响应性的纳米球形聚电解质刷的制备及其乳化性能  

Preparation and Emulsifying Performance of CO_2-Responsive Spherical Polyelectrolyte Brush

作　　者：沈哲琦 张锐[1] 王磊[1] 姚远[2] 郭旭虹[1] 朱学栋[1] 

机构地区：[1]华东理工大学化工学院,化学工程联合国家重点实验室,上海200237 [2]华东理工大学材料科学与工程学院,上海200237

出　　处：《功能高分子学报》2017年第2期175-181,共7页Journal of Functional Polymers

基　　金：国家自然科学基金(21374029,21004021,51573088,21446003);上海市教委科研创新重点项目(14ZZ061);教育部博士点基金(20130074110018)

摘　　要：以聚苯乙烯(PS)纳米球为核,利用紫外光引发聚甲基丙烯酸N,N-二甲基氨基乙酯(PDMAEMA)接枝到PS纳米球上,得到对CO_2有刺激响应的聚甲基丙烯酸N,N-二甲基氨基乙酯刷(PS-PDMAEMA)。动态光散射(DLS)、电导率结果表明PS-PDMAMEA具有CO_2刺激响应性。该微粒可以作为Pickering乳液的乳化剂,通过导入CO_2或N_2作为开关,进而破坏或稳定Pickering乳液。用数码照片、偏光显微镜等方法表征了乳液的稳定情况。结果表明:PS-PDMAEMA具有很好的CO_2刺激响应性,利用PS-PDMAEMA作为乳化剂稳定Pickering乳液,仅仅依靠气体开关(CO_2或N_2)就可改变乳液的稳定性。A novel CO2-responsive cationic spherical polyelectrolyte brush（SPB） was synthesized by photoemulsion polymerization,which was composed of a solid polystyrene（PS）core and poly（2-（dimethylamino）ethyl methacrylate）（PDMAEMA）shell densely grafted onto the core surface.The most important property of PS-PDMAEMA is the performance of CO2 response to Pickering emulsion which could employe CO2/N2 as a trigger.Dynamic light scattering（DLS）,conductivity measurement,digital photography and polarizing microscope were used to characterize the emulsifying performance of PSPDMAEMA microspheres.The results confirmed that PS-PDMAEMA was a CO2-responsive cationic spherical polyelectrolyte brush and could regulate the properties of Pickering emulsion with the help of CO2/N2.It could broaden the usage of CO2 as a green stimulation.

关 键 词：二氧化碳响应 球形聚电解质刷 Pickering乳液 

分 类 号：O63[理学—高分子化学]