外场对聚(3-己基噻吩)溶液结晶行为的影响  

Effect of External Field on Crystallization Behavior of Poly (3-hexylthiophene) Solution

作　　者：刘珂 杨清雷[1] 唐亚明[1] 王泽华[1] LIU Ke;YANG Qinglei;TANG Yaming;WANG Zehua(College of Mathematics and Physics, Qingdao University of Science and Technology,Qingdao 266061, Shandong, China)

机构地区：[1]青岛科技大学数理学院,山东青岛266061

出　　处：《功能高分子学报》2019年第3期374-380,共7页Journal of Functional Polymers

基　　金：国家自然科学基金(21604047);山东省自然科学基金(ZR2016BB28)

摘　　要：以聚(3-己基噻吩)(P3HT)为研究对象,借助紫外-可见光谱与原子力显微镜,详细考察了旋转剪切场、紫外光照射、超声处理3种外场对P3HT/混合溶剂(CHCl3-CH2Cl2)体系结晶行为的影响,此外,还研究了P3HT溶液结晶的"记忆效应"。研究表明:旋转场能够显著提高P3HT的结晶度,而紫外光照射和超声处理易使溶液中分子链的活动性增加,对结晶性的影响不显著;施加外场并没有改变溶液中纳米线的聚集形式,仍为H聚集;P3HT溶液的初始态不同,其结晶过程中的晶体微结构及形貌也会发生变化。Because of the regularity of the nanowire and its large ratio of length to diameter, it can greatly improve the electron mobility along the nanowire growth direction, therefore nanowire becomes the research focus in the photoelectric polymer field. External field can influence the order degree of polymer chain. In order to investigate the effect of the external field on the order degree of poly(3-hexylthiophene)(P3HT) chains in detail, the influence of the rotating shearing field, the ultraviolet radiation, and the ultrasonic treatment field on the crystallization behavior of the P3HT/mixed solvent (CHCl 3-CH 2Cl 2, V CHCl 3 / V CH 2Cl 2 =1/2) was investigated by using UV-Vis spectroscopy and AFM. In addition, the “memory effect” of P3HT solution crystallization was studied. The in-situ UV-Vis characterization for the effect of the rotating shearing field on the structure is performed on the home-made instrument. Under the rotating shear field, ultraviolet irradiation and ultrasonic treatment, the degree of crystallization and aggregation of P3HT solutions mixed solvents are different. The degree of crystallization of P3HT is significantly improved by rotating at 1 500 r/min for 24 h, and under ultraviolet light of 254 nm and 365 nm for 20 min. The crystallinity of P3HT solution is also improved. The external fields have not changed the H aggregation of the nanowires. The crystal microstructure and morphology change depends on different initial states of the P3HT solution.

关 键 词：聚(3-己基噻吩) 溶液结晶 外场 记忆效应 

分 类 号：R318.08[医药卫生—生物医学工程]