摘要
在化学氧化聚合的反应介质中分散二氧化硅粒子,苯胺(ANI)优先在二氧化硅粒子表面聚合,形成聚苯胺(PANI)包覆的二氧化硅复合粒子(SD/PANI)。扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察表明,ANI用量较小时,在二氧化硅粒子表面形成均匀的PANI层,其厚度在10～60nm之间;ANI用量较大时,二氧化硅粒子表面有颗粒状PANI形成。紫外-可见光光谱(UV-VIS)和X射线光电子能谱(XPS)分析表明,复合粒子表面PANI的氧化程度随ANI用量的减小有所下降。复合粒子表面的PANI对二氧化硅结合牢固,这种复合粒子能像纯PANI颗粒一样使冷轧钢(CRS)表面钝化,可以作为廉价的缓蚀剂用于防腐涂料。
Polyaniline (PANI) was formed preferentially on the surfaces of silicon dioxide particles, which resulted in PANI coated silicon dioxide composite particles (SD/PANI), when aniline (ANI) was polymerized through chemical oxidative polymerization with the presence of silicon dioxide particles. Scanning electron microscopy (SEM) and transmitting electron microscopy (TEM) examinations showed that smooth PANI layer with thickness of 10-60nm was formed with lower ANI content in reactants; while with higher ANI content, the PANI layer showed particulate appearance. UV-VIS spectra and X-ray photoelectron spectroscopic (XPS) analyses have indicated that oxidation state of PANI on the surfaces of silicon dioxide particles decreases with the content of silicon dioxide particles in reactants. PANI layer adhered firmly to the surface of silicon dioxide particle and the composite particles passivated the cold rolled steel (CRS) as the pure PANI did.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第1期20-24,共5页
Journal of Materials Engineering
基金
国家自然科学基金项目 (5990 3 0 0 5)
关键词
聚苯胺
二氧化硅
复合粒子
钝化
polyaniline
silicon dioxide
composite particle
passivation
