摘要
以丙烯酸正丁酯(BA)、甲基丙烯酸甲酯(MMA)、甲基丙烯酸羟丙酯(HpA)为核单体,甲基丙烯酸十二氟庚酯(DFMA)、BA、MMA和HpA为壳单体,采用半连续种子乳液聚合法合成了核壳型含氟丙烯酸酯乳液(CFBMH),然后掺杂自制超疏水金红石型纳米TiO_2-SiO_2,制备了具有自清洁功能的TiO_2-SiO_2/CFBMH复合材料,并通过FT-IR、19F NMR、TEM、AFM、TGA、水接触角(WCA)、Zeta电位及粒度分析仪等手段对乳液的结构及形态、乳胶膜的表面形貌、耐热性能和疏水性能进行了表征和测试.结果表明,DFMA和TiO_2-SiO_2的最佳投料量分别是15wt.%和0.3wt.%,所制备的TiO_2-SiO_2/CFBMH乳液成膜之后具有优异的疏水性能,接触角达135°,自清洁能力强,在外墙涂料领域有广阔的应用前景.
A self-cleaning titania-silica nanocomposites/waterborne fluorinated acrylic latex with core- shell structure （TiO2-SiO2/CFBMH） was successfully synthesized by a semi-continuous seed emulsion polymerization method using butyl acrylate （BA）, methylmethacrylate （MMA）, and methyl hydroxypropyl acrylate （HpA） as the core monomers, dodecafluoroheptyl methacrylate （DFMA）, MMA, BA and HpA as the shell monomers, followed by the modification with highly hydrophobic futile TiO2-SiO2 nanocomposites （self-made）. The optimized contents of DMFA and TiO2 SiO2 nanocomposites were determined as 15 wt. % and 0. 3 wt. %, respectively. The obtained CFBMH and TiO2-SiO2/ CFBMH latexes were characterized by FTIR, 19F NMR, TEM, AFM and TGA. The resulting TiO2- SiO2/CFBMH was highly hydrophobic （WCA= 135°） due to the surface enrichment of fluorine groups in the thin shell and the formation of surface micro/nano structure based on TiO2-SiO2 nanocomposites. In the real application test, the latex film of TiO2-SiO2/CFBMH exhibited an excellent self-cleaning ability highlighting its potential application in exterior wall coatings.
出处
《中北大学学报（自然科学版）》
北大核心
2017年第4期466-472,486,共8页
Journal of North University of China(Natural Science Edition)
基金
山西省科技创新资助项目(2014101011)
山西省自然科学基金重点资助项目(2014011003-1)
关键词
含氟丙烯酸酯乳液
核壳结构
微纳结构
疏水性
自清洁
fluorinated acrylic latex
core-shell structure
micro/nano structure
hydrophobic
selfcleaning
