化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (6) : 88-92.

新材料与新技术

原位聚合法制备纳米SiO₂/PTFE改性丙烯酸酯复合乳液研究

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Preparation and property of SiO₂/PTFE modified acrylate composite emulsion by in-situ polymerization

Chen Jing¹, Yang Jianjun¹, Fu Libing², Wu Qingyun¹, Wu Mingyuan¹Zhang Jian'an¹, Wang Lei², Ding Chaoyang²

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Received		Published
2018-01-31		2019-06-20
Issue Date	Revised Date
2019-07-05	2018-01-31

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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。

Abstract

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) and γ-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 151nm 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.

关键词

原位聚合法 / 聚四氟乙烯 / 疏水性 / 耐热性

Key words

in-situ polymerization / polytetrafluoroethylene / hydrophobicity / heat resistance

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原位聚合法制备纳米SiO₂/PTFE改性丙烯酸酯复合乳液研究[J]. 化工新型材料, 2019, 47(6): 88-92 DOI:

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