模板法制备聚苯胺及其光热性质研究

A Study on the Template Synthesis and Photothermal Effect of Polyaniline

近年来,聚苯胺由于其独特的光学吸收特性和导电性质受到很多科学家的青睐。但是,聚苯胺极差的稳定性、不可控的形貌成为其在各个领域应用中的阻碍。因此,本文利用聚苯乙烯磺酸(PSS)作为苯胺聚合的模版,分别采用氯化铁(ferric chloride)、硫代硫酸铵(ammonium thiosulphate)作为氧化剂来制备聚苯胺纳米材料。利用电子显微镜和紫外可见分光光度计对其形貌、光学特性进行了研究。研究发现,氧化剂的使用对其纳米材料的形貌起决定性的作用,氯化铁作氧化剂制备出大小均一、规则的球形纳米粒子;硫代硫酸铵作为氧化剂制备出细长的纳米纤维。所制备的聚苯胺纳米材料具有显著的光热效应,有潜力用于肿瘤的光热治疗。

Recently,polyaniline has been focused increasingly due to its unique optical and conductive property.However,its poor stability and uncontrolled morphology greatly limited its further application.Herein,polystyrene sulfonic acid(PSS) was used as a template for in situ polymerization of aniline to fabricate stable polyaniline nanomaterials,in which ferric chloride and ammonium thiosulphate were employed as the oxidants,respectively.The self-assembled morphology and the optical property of the resultant aggregates were examined by electron microscopy and ultraviolet-visible absorption spectroscopy.The selection of oxidants had great effects on the morphology of polyaniline,and spherical nanoparticles with uniform size and regularity were obtained for ferric chloride,and elongated nanofibers of polyaniline were observed from the oxidation of ammonium thiosulfate.The fabricated polyaniline nanoparticles possessed significant photothermal effect,which is promising in tumor photothermal therapy.