混合溶剂法组装聚噻吩类衍生物的纳米结构  

Assembling of Polythiophene Derivative Nanostructures by Mixing Solvents

作　　者：王文[1] 孙敏敏[1] 王维[1] 周铭露[1] 梁露英[1] 凌启淡[1] 

机构地区：[1]福建师范大学材料科学与工程学院福建省高分子材料重点实验室,福州350007

出　　处：《材料研究学报》2014年第3期185-190,共6页Chinese Journal of Materials Research

基　　金：国家自然科学基金60976019&61250016;福建省教委A类项目JA12069;福建省高校创新研究团队项目IRTL1201资助~~

摘　　要：用FeCl3氧化偶联法制备侧链具有酯基和烷基的聚噻吩类衍生物P3HT-co-P3AcET,用凝胶液相色谱和核磁共振氢谱对其结构进行了表征。选择甲苯作为聚合物的良溶剂,1,4-二氧六环或甲醇作为不良溶剂,调节两者的比例并控制陈化时间,在混合溶剂中组装出具有不同形貌的聚合物纳米结构。扫描电镜分析结果表明,以亲油值大的二氧六环作为不良溶剂时可在混合溶剂中将聚合物组装成纳米纤维束;以亲油值小的甲醇作为不良溶剂时可在混合溶剂中将聚合物组装成纳米球状粒子。用紫外可见光吸收光谱解析纳米结构中聚合物链的排列形式,并初步探究了将聚合物组装成纳米结构材料的机理。The copolymer of polythiophene derivative （P3HT-co-P3AcET） containing alkyl and ester side chain was prepared by FeCI3 oxidative coupling copolymerization. The chemical structure of the resulted copolymer was characterized by GPC, 1H NMR, et al. The assembling of P3HT-co-P3AcET nano- structures was performed by mixing solvents, of which toluene was adopted as the good solvent, while dioxane or methanol as the poor solvent. The nanostructures of P3HT-co-P3AcET with different morphologies were obtained by adjusting the ratio of the mixed solvents and the aging time. The SEM results show that the assembling of P3HT-co-P3AcET tends to produce nanofiber bundles with dioxane as the poor solvent, and spherical nanoparticles with methanol as the poor solvent in the mixed solvents, re- spectively. For which a higher lipophilic value of dioxane rather than that of methanol may be responsible. The arrangement manner of the copolymer chains was analyzed by ultraviolet visible light absorption spectrum. The results show that the different arrangement manners of the copolymer chains can give rise to different morphologies in nanoscale, such as nanofiber bundles and spherical nanoparticles. Finally the mechanism concerning the formed nanostructures of the assembled copolymer was also preliminarily explored.

关 键 词：有机高分子材料 聚噻吩衍生物 氧化偶联 亲油值 纳米纤维束 纳米球状粒子 

分 类 号：TB324[一般工业技术—材料科学与工程] O632[理学—高分子化学]