羰基铁粉@聚苯胺防腐吸波粉体的制备与性能  

Synthesis and Properties of CIP@PANI Composite Powders for Anticorrosion and Microwave-absorbing Application

作　　者：汪晓芹[1] 徐金鑫[1] 黄大庆[2] 熊善新[1] 邓宇强[3] 宫铭[1] 张永[1] 郭飞[1] 

机构地区：[1]西安科技大学化学与化工学院,西安710054 [2]北京航空材料研究院,北京100095 [3]西安热工研究院有限公司,西安710032

出　　处：《材料工程》2014年第11期90-96,共7页Journal of Materials Engineering

基　　金：陕西省自然科学基础研究计划项目(2011JY012);榆林市2010年省市联合资助基础研究项目(201110-11)

摘　　要：通过引发吸附在十二烷基苯磺酸(DBSA)改性羰基铁粉(CIP)表面的苯胺原位聚合,制备了具有核壳结构的羰基铁粉@聚苯胺(PANI)复合粉体。研究表明:DBSA对羰基铁粉有良好的分散保护作用;羰基铁粉经聚苯胺包覆后,涂层的自腐蚀电位显著升高,阳极极化电流变化平缓,显著降低了金属被氧化腐蚀的速度;聚苯胺链上的—NH—与环氧树脂链上的环氧端基间产生化学键合和氢键,对涂层有显著的增强增韧效果;涂层的微波吸收更强,有效频宽变宽,最大吸波向高频方向移动。Core-shell structured CIP@PANI composite powders were synthesized by in-situ polymerization through triggering aniline, which is adsorbing on the surface of DBSA modified CIP. The results show that DBSA can protect CIP from oxidization. The coating exhibits the excellent anticorrosion performance because the metal under or in the coating had lower oxidation corrosion rate due to higher corrosion potential and gentler changes of anodic polarization current, after CIP was encapsulated by PANI. Due to the chemical bonds and the hydrogen bonds produced between-NH-on the polyaniline chains and epoxy groups on epoxy resin chains, the coating filled with CIP@PANI has higher strength and toughness than the coating filled with CIP. Additionally, the coating filled with CIP@PANI has stronger microwave absorption, wider effective bandwidth and higher frequency of maximum-absorption microwave than the coating filled with CIP.

关 键 词：聚苯胺 羰基铁粉 十二烷基苯磺酸 防腐 吸波 

分 类 号：TB332[一般工业技术—材料科学与工程]