摘要
为了增强纳米Si O2在氟碳涂层中的分散性、润湿性,以提高氟碳涂料的性能,在纳米Si O2表面包覆聚苯乙烯(PS)进行改性,将改性后的Si O2粒子添加到三氟型FEVE氟碳涂料中,制成复合氟碳涂料,涂覆于马口铁或玻璃表面。采用傅里叶变换红外光谱(FTIR)和透射电镜(TEM)分析了纳米Si O2改性前后的结构,采用紫外分光光度计、接触角测量仪和电化学工作站测试了复合氟碳涂层的结构及性能。结果表明:PS成功地包覆在纳米Si O2粒子表面,且粒径大小均一;与不含Si O2氟碳涂料相比,改性后纳米Si O2粒子添加量为氟碳树脂的3%时,复合氟碳涂料的耐腐蚀性、抗紫外老化性、耐酸碱性、附着力以及其他物理性能都得到较大改善,且涂层表面具有较好的疏水自清洁性能。
SiO_2 nanoparticles were surface-capped by polystyrene(denoted as PS) so as to improve their dispersibility and wettability in fluorocarbon paint thereby improving the performance of the fluorocarbon paint.Resultant surface- capped SiO_2nanoparticles were then introduced into polychlorotrifluoroethylene(denoted as FEVE) fluorocarbon paint affording composite paint.As-obtained composite fluorocarbon paint was coated onto tinplate or glass substrate providing the composite coating.The chemical structure and microstructure of SiO_2 nanoparticles before and after surface-capping with PS were analyzed by Fourier transform infrared spectrometry and transmission electron microscopy,and the microstructure and properties of as- prepared FEVE composite coating were investigated with an ultraviolet spectrophotometer,a contact angle meter,and an electrochemical workstation.Results indicated that SiO_2 nanoparticles were successfully encapsulated by PS,and resultant surface-capped SiO_2 nanoparticles exhibited uniform size.As compared with the FEVE fluorocarbon coating,the one containing 3%(mass fraction) SiC nanoparticles exhibited much better corrosion resistance,ultraviolet resistance,resistance to acid and alkaline,adhesion to substrate and other physical properties.Moreover,the FEVE composite coating doped with surface- capped SiO,exhibited hydrophobicity and good self-cleaning ability.
出处
《材料保护》
CAS
CSCD
北大核心
2014年第12期18-21,7,共4页
Materials Protection
基金
江苏高校优势学科建设工程项目(PAPD-201227)资助
关键词
改性纳米SiO2
复合氟碳涂料
性能
surface-capped SiO2 nanoparticles
composite fluorocarbon composite paint
properties
