调控非共价相互作用实现聚电解质膜内多孔形成的研究  

Pore-formation through Controlling Noncovalent Interactions in Polyelectrolyte Film

作　　者：黄威嫔 黄丹妮 任科峰[1] 计剑[1] Wei-pin Huang;Dan-ni Huang;Ke-feng Ren;Jian Ji(MOE Key Laboratory of Macromolecule Synthesis and Functionalization,Department of Polymer Science and Engineering,Zhejiang University,Hangzhou 310027)

机构地区：[1]浙江大学高分子科学与工程学系,教育部高分子合成与功能构造重点实验室,杭州310027

出　　处：《高分子学报》2021年第8期978-986,I0003,共10页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号51933009,21875210);浙江省万人计划(项目号2018R52001)资助项目。

摘　　要：静电层状组装聚电解质膜主要由静电作用为驱动力,带有相反电荷的聚电解质在基底表面进行交替沉积制得,其结构可以通过膜内分子运动性的改变来调控.本研究在静电作用基础上,通过在聚丙烯酸(PAA)上接枝偶氮苯基团(Azo),得到含有2种非共价相互作用的聚乙烯亚胺/偶氮苯修饰的聚丙烯酸(PEI/PAA-Azo)膜.利用光照和弱酸溶液对2种相互作用进行顺序调控,实现在PEI/PAA-Azo膜内区域、可逆地构建微孔结构.进一步地,利用该体系展开了区域负载功能分子以及局部调控生物膜的形成的研究.本研究为探究聚电解质膜内分子运动性对膜结构和动态性的影响提供了一种可行的策略,并且拓展了聚电解质膜的应用前景.Layer-by-layer assembly(LbL)polyelectrolyte film driven by electrostatic interaction is fabricated from alternate deposition,which has garnered broad interest all over the world in the fields of anti-bacteria,antifouling,separation,sensor,etc.The mobility of polymeric chains plays a vital role in the dynamic and structural control of polyelectrolyte film.Owing to the intrinsic sensitivity of electrostatic interaction for the external environment,the mobility of polymeric chains could be adjusted,and then their structures could be dynamically tuned.However,few studies have illuminated the specific role of polyanion or polycation in these procedures.Our proposal is based on a polyelectrolyte film with azobenzene(Azo)interaction,whose structure could be dynamically and reversibly controlled under the action of ultraviolet(UV)irradiation,acid treatment,and water plasticization.Herein,azobenzene were grafted onto poly(acrylic acid)(PAA)through amidation reaction.The poly(ethyleneimine)/PAA-Azo(PEI/PAA-Azo)film,which contained two kinds of noncovalent interactions,was fabricated by the LbL technique.Porous structures were constructed in PEI/PAA-Azo film after UV irradiation in a bath of the acid solution,while the film kept solid without UV irradiation after acid treatment.Patterned porous PEI/PAA-Azo film was obtained after regional UV irradiation and acid treatment.Thanks to the reversibility of azobenzene interaction and electrostatic interaction,the patterned porous structures were constructed reversibly.Furthermore,CdSe/ZnS quantum dots were spatially encapsulated into the film to develop a pattern that was visible in UV light but invisible in visible light.Through lubricate-infusion in porous regions,a patterned antifouling surface was fabricated,where patterned biofilm was cultured successfully.This study presented a feasible strategy for realizing the importance of polyanion mobility for the structure and dynamics of polyelectrolyte film,and it opened a broad window for the applications(such as information stor

关 键 词：静电层状组装 聚电解质膜 动态结构 偶氮苯 微孔结构 

分 类 号：O631.1[理学—高分子化学] O646[理学—化学] TB383.2[一般工业技术—材料科学与工程]