聚合诱导自组装制备聚合物纳米材料及其在水凝胶改性方面的应用研究  

Preparation of polymer nanomaterials by polymerization-induced self-assembly and their application in hydrogel modification

作　　者：张雷 董其宝 张梅[3] 张文建 白玮 ZHANG Lei;DONG Qibao;ZHANG Mei;ZHANG Wenjian;BAI Wei(Institute of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Hunan Tianfu New Materials Company,Changsha 410211,China;North District,First Affiliated Hospital of Anhui Medical University,Hefei 230012,China)

机构地区：[1]安徽大学物质科学与信息技术研究院,安徽合肥230601 [2]湖南天氟新材料有限公司,湖南长沙410221 [3]安徽医科大学第一附属医院北区,安徽合肥230012

出　　处：《湘潭大学学报(自然科学版)》2025年第1期129-138,共10页Journal of Xiangtan University(Natural Science Edition)

基　　金：国家自然科学基金(K110162117);安徽省科研编制计划项目科学研究项目重点项目(2022AH050646)。

摘　　要：聚合诱导自组装(PISA)是一种高效制备聚合物纳米材料的方法,该方法为研究聚合物纳米材料的形貌奠定了坚实的基础.在典型的PISA体系中,疏水链段随着聚合的进行而不断增长进而驱动所得聚合物纳米材料发生形貌转变,制备出各种形貌的聚合物纳米材料.然而,利用不同组成的聚合物制备的聚合物纳米材料不是研究形貌对其性能影响的理想样品,因为很难确定究竟是组成还是形貌对聚合物纳米材料的性能产生了决定性的影响.该文通过PISA策略在固含量为20%时制备出了组成为P(MEO_(2)MA)_(35)-b-P(BzMA_(120)-co-HBMA3)的蠕虫状胶束,并通过降低PISA体系的固含量(5%)制备了聚合物组成相同的球形胶束.随后将两种纳米材料与基底聚合物P(MEO_(2)MA-co-MAA)进行简单的共混制备纳米复合型水凝胶,在宏观水凝胶材料内部引入预制的微相分离结构并研究其对水凝胶力学性能的影响,同时探究了PISA基纳米添加剂的形貌对水凝胶力学性能的影响(有效排除了聚合物组成的影响).结果表明球形胶束和蠕虫状胶束均能实现对复合水凝胶增强和增韧,并且复合型水凝胶保持良好的透明性;对不同形貌的纳米材料来说蠕虫状胶束具有更优异的增强和增韧效果.Polymerization-induced self-assembly(PISA)is an efficient way to prepare polymer nanomaterials,which lays a solid foundation for studying the polymer nanomaterials'morphology.In the typical PISA system,the degree of polymerization of the hydrophobic segment increases with the progress of polymerization,which drives the morphology transformation of the obtained polymer nanomaterials to prepare polymer nanomaterials with various morphologies.However,polymer nanomaterials prepared with different compositions are not perfect samples to study the influence of morphology on their properties.Because it is difficult to determine whether the composition or morphology has a decisive influence on the properties of polymer nanomaterials.In this paper,the worm-like micelles of P(MEO_(2)MA)_(35)-b-P(BzMA_(120)-co-HBMA_(3))were prepared by PISA strategy with the solid content of 20%,and the spherical micelles of P(MEO_(2)MA)_(35)-b-P(BzMA_(120)-co-HBMA_(3))with the same polymer composition were prepared with the solid content of PISA(5%).Then two kinds of nano-materials were blended with the base polymer P(MEO_(2)MA-co-MAA)to prepare nano-composite hydrogels.The prefabricated microphase separation structure was introduced into the macro-hydrogels and its influence on the mechanical properties of the hydrogels was studied.At the same time,the influence of the morphology of PISA-based nano-additives on the mechanical properties of the hydrogels was investigated(the influence of polymer composition was effectively excluded).The results show that both spherical micelles and worm-like micelles can strengthen and toughen the composite hydrogel and the composite hydrogel has good transparency.For nano-materials with different morphologies,worm-like micelles have better reinforcement and toughening effects.

关 键 词：可逆加成-断裂链转移聚合 聚合诱导自组装 微相分离 纳米复合型水凝胶 

分 类 号：O631[理学—高分子化学]