含氟苯丙无皂乳液的合成及其在涂料中的应用  

Preparation of Fluorinated Polystyrene-acrylate Soap-free Emulsion and Its Application in Fluorocarbon Coating

作　　者：宁姣姣[1] 安秋凤[1] 马丽[1] 吴婧[1] 许伟[1] 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《精细化工》2012年第10期1015-1020,共6页Fine Chemicals

基　　金：陕西省科技厅重大科技专项13115项目(2010ZDKG-35);陕西省教育厅产业化项目(2011JG25)~~

摘　　要：以过硫酸铵(APS)为引发剂,将丙烯酸丁酯(BA)、苯乙烯(ST)、丙烯酸(AA)与甲基丙烯酸十二氟庚酯(DFMA)通过无皂乳液聚合法制备了含氟苯丙无皂乳液(BSAD)。通过IR、TEM、粒度仪及Zeta电位分析仪表征了乳液主组分结构、乳胶粒形貌、粒径分布及Zeta电位,并考察了丙烯酸钠、引发剂APS、DFMA的用量及反应温度对乳液性能的影响。并将该乳液与纳米TiO2等复配制备了氟碳涂料。结果表明,当丙烯酸钠质量分数为12%,APS质量分数为1%,反应温度为78℃时,乳液性能最佳,此时凝胶率为0.8%,耐水性大于168 h,单体转化率为97.1%;当DFMA质量分数为25%时,涂膜疏水性最佳,水接触角达到113°,吸水率为6.4%;制得的氟碳涂料的附着力、硬度、耐水性等都获得了令人满意的效果。A fluorinated polystyrene-acrylate emulsion（BSAD） was prepared by soap-free emulsion polymerization from dodecafluoroheptyl methacrylate（DFMA）,butyl acrylate（BA）,styrene（ST） and acrylic acid（AA）,with（NH4）2S2O8（APS） as an initiator.And the chemical structure,morphology of latex grain,size distribution and Zeta potential of BSAD were characterized by means of infrared spectrum（IR）,transition electron microscopy（TEM）,particle analyzer and Zeta potential analyzer.The effects of temperature and dosage of sodium acrylate,APS and DFMA on the properties of emulsion were discussed.And the emulsion was employed with nano-TiO2 to prepare the fluorocarbon coating.The results show that,when the dosage of sodium acrylate and APS was 12% and 1% respectively and the reaction temperature was 78 ℃,the emulsion displayed the best properties,with its gel rate being 0.8%,the time of water tolerance being longer than 168 h,percent conversion being 97.1%;when the dosage of DFMA was 25% of monomers,the coating displayed the best hydrophobicity with the water contact angle on its surface being 113°,water absorption rate being 6.4%.The fluorocarbon coating thus manufactured won satisfying effect in terms of such properties as adhesion,hardness and water resistance.

关 键 词：含氟苯丙乳液 无皂乳液聚合 氟代聚丙烯酸酯 氟碳涂料 粘合剂 

分 类 号：TQ314.2[化学工程—高聚物工业]