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Abstract
Several technical factors and structure characterizations of core-shell fluorinated acrylate emulsion were discussed in this study. Methyl methacrylate(MMA) and butyl acrylate (BA)were used as compound monomers, 2 – per fluorinated hexyl ethyl methacrylate and methyl hexadecyl methacrylate were used as functional monomers. Under the mixing emulsifiers systems of nonionic and cationic, semi-continuous emulsion polymerization process was used to compound core-shell fluorinated acrylate emulsion. Effects of the mass ratio of monomer in core to in shell, the amount of emulsifier, the amount of fluorine monomer, and reaction temperature were discussed and the products were characterized by IR and transmission electron microscopy. The results show that the core - shell fluorinated acrylate emulsions with proper viscosity, uniform particle size distribution, good stability and excellent mechanical property of the coating can be prepared when the mass of compound emulsifier was 4%( NP-40:C18TAB=1:2), the mass of fluorine monomer was 12% and the reaction temperature was 70℃. In this study, technical factors and structure characterizations of C6 ‘triple-proofing’ finish were studied successfully and qualities of products were matained with decreasing the mass of fluorine monomer.
Key words: Core-shell; ‘triple-proofing’finish; product characterization
目录
摘要 2
Abstract 3
1. 绪论 5
1.1 概述 5
1.2 含氟丙烯酸酯三防整理剂的结构与性质 5
1.3 研究现状与进展 6
1.3.1 国外三防整理剂研究现状 6
1.3.2 国内三防整理剂研究现状 7
1.4 存在的问题 8
1.5 研究课题任务与研究意义 9
1.5.1研究课题任务 9
2.实验部分 10
2.1仪器药品 10
2.2 实验原理 11
2.2.1 含氟聚合物成膜界面 11
2.2.2 静态的表征-接触角 11
2.3 方案设计 13
2.3.1总体的方案思路 13
2.3.2 具体的方案设计图 14
2.4 实验步骤 15
2.4.1 聚合实验方法 15
2.4.2 单因素平行实验 15
2.4.3红外与透射表征 24
3. 结语 26
致谢 27
参考文献 28
4 附录 31
4.1 固含量测定 31
4.2 转化率 31
4.3 聚合稳定性 31
4.4 膜性能 32
4.5 接触角测试 32
4.6乳液的破乳和精制基本操作步骤 32
1. 绪论
1.1 概述
丙烯酸酯系树脂因为其成膜性能好, 其漆膜的耐水性、耐光性、耐碱性、耐老化性及保色性也好, 并有很好的施工性能, 而被十分广泛应用，但是它的抗污性、耐候性等不尽人意[1]。而含氟聚合物材料由于其表面能极低，具有良好的热稳定性，优异的耐化学性耐热性和耐候性，以及低折射率和低介电常数，可以被用作表面改性剂如用在不同的底物（如纺织品、纸张，皮革，地毯，无纺布或建筑材料）表面的拒水剂、拒油剂和除污剂，因此受到学术和工业界的高度关注，在功能涂料等行业也具有广泛的应用前景[2-4]。然而，含氟聚合物材料溶解性较差，一般只能溶于含氟溶剂中，同时成本也较高，应用上因此受到限制。因此，可在含氟聚合物中引入非氟化丙烯酸酯链段得到含氟丙烯酸酯聚合物，这样既提高了含氟聚合物的溶解性，又能综合两种聚合物各自的特点，使其性价比大大提高，含氟丙烯酸酯聚合物够赋予材料极低的表面能，形成明显的防水、防油效果，耐沾污性强，并以其极好的耐候性、耐老化性、耐溶剂性、耐化学腐蚀性，在化工、纺织、建筑、航天等许多领域具有良好的应用前景[5-6]。