摘要
以三羟甲基丙烷三丙烯酸酯(TMPTA)、甲基丙烯酸甲酯(MMA)、苯乙烯(St)、丙烯酸正丁酯(BA)、2-甲基-2-丙烯酸十三烷基酯(TDMA)、硅酸乙酯(TEOS)和γ-甲基丙烯酰氧丙基三甲氧基硅烷(MPS)为反应单体,聚四氟乙烯(PTFE)分散液作种子,通过原位聚合法和种子乳液法制备出纳米SiO2、PTFE协同改性的丙烯酸酯(SiO2/PTFE/PA)复合乳液。利用傅里叶变换红外光谱仪、透射电子显微镜、扫描电子显微镜、热重分析仪和接触角/界面张力测量仪对复合乳液的结构与性能进行了表征和测试。结果表明:当PTFE占体系中丙烯酸酯类单体总质量16%、纳米SiO2用量为2.4%(质量分数)时,复合乳液平均粒径为151nm,胶膜表面水接触角为112.3°,吸水率为3.8%;在热失重5%和10%条件下,纳米SiO2/PTFE/PA胶膜热分解温度分别为347.7℃和375.5℃,相比改性丙烯酸酯胶膜热分解温度分别提高了59.6℃和27.7℃,疏水性和耐热性均有显著提高。
The nano-SiO2/PTFE modified acrylate emulsion was prepared by in-situ polymerization and seed emulsion polymerization with trihydroxymethylpropyl trimethylacrylate(TMPTA),methyl methacrylate(MMA),styrene(St),butyl acrylate(BA),tridecyl methacrylate(TDMA),ethyl silicate(TEOS)andγ-methacryloxypropyltrimethoxysilane(MPS)as monomer,and PTFE dispersion liquid as seeds.The structure and properties of polymers were characterized and tested by FT-IR,TEM,SEM,TG and water contact angle measurement.The results showed that when the amount of PTFE dispersion was 16% and nano-SiO2 content was 2.4%,the average particle size of emulsion was 151 nm and the surface water film contact angle was 112.3°,the water absorption rate was 3.8%,the characteristic decomposition temperature at 5% and 10% weight loss were 347.7℃ and 375.5℃,compared with the pure acrylate decomposition temperature increased by 59.6°and 27.7°respectively.The hydrophobic resistance and heat resistance were significant to improve.
作者
陈静
杨建军
付立兵
吴庆云
吴明元
张建安
王雷
丁朝阳
Chen Jing;Yang Jianjun;Fu Libing;Wu Qingyun;Wu Mingyuan;Zhang Jianan;Wang Lei;Ding Chaoyang(School of Chemistry and Chemical Engineering of Anhui University Key Laboratory ofEnvironment-friendly Polymer Materials of Anhui Province, Hefei 230601;Anhui Huachen Paper-Makeing Net Co., Ltd., Wuhu 241009)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第6期88-92,共5页
New Chemical Materials
基金
安徽省2017年度科技计划重点项目(1704a0902018)
安徽省高校自然科学研究重点项目(KJ2016A792)资助
关键词
原位聚合法
聚四氟乙烯
疏水性
耐热性
in-situ polymerization
polytetrafluoroethylene
hydrophobicity
heat resistance
