有机氟无机纳米二氧化钛复合改性丙烯酸酯乳液的制备及性能研究
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摘要
采用半连续种子乳液法将自制的表面亲油性接枝改性纳米二氧化钛与含氟单体甲基丙烯酸十三氟辛酯(G06B)等复合改性丙烯酸酯乳液,用红外光谱(FT-IR)、乳胶膜表面形态分析(AFM)、热重(TG)和拉力机等测试手段研究了表面改性无机纳米TiO_2以及有机氟的引入对乳液及乳胶膜性能的影响。结果表明,改性TiO_2的引入显著增强了聚合物乳胶膜的力学性能并进一步优化了乳胶膜的表面疏水性;乳胶膜疏水性随含氟单体用量增加而增大,热稳定性也有一定地提高,当G06B用量为20%、改性TiO_2用量为0.2%时,乳胶膜的综合性能相对最佳。
The acrylate emulsion modified with the self-made surface-modified TiO_2 with lipophilicity and the monomer containing fluorine,1H,1H,2H,2H-perfluorooctyl methacrylate(G06B),was prepared by the semi-continuous seed emulsion polymerization.The effects of the surface-modified nano TiO_2 filler and the introduction of organic monomer containing fluorine on the properties of emulsion and latex film were studied by means of FT-IR,AFM,TG and tensile testing machine.The results showed that the modified nano TiO_2 filler markedly enhanced the mechanical properties of the latex film and improved the surface hydrophobicity of the latex film;the increase of the amount of fluorinated monomer increased the film hydrophobilicity and the thermal stability in a way,when the content of G06B was 20%and the content of nano TiO_2 was 0.2%,the comprehensive performance of latex film was relatively optimal.
The acrylate emulsion modified with the self-made surface-modified TiO_2 with lipophilicity and the monomer containing fluorine,1H,1H,2H,2H-perfluorooctyl methacrylate(G06B),was prepared by the semi-continuous seed emulsion polymerization.The effects of the surface-modified nano TiO_2 filler and the introduction of organic monomer containing fluorine on the properties of emulsion and latex film were studied by means of FT-IR,AFM,TG and tensile testing machine.The results showed that the modified nano TiO_2 filler markedly enhanced the mechanical properties of the latex film and improved the surface hydrophobicity of the latex film;the increase of the amount of fluorinated monomer increased the film hydrophobilicity and the thermal stability in a way,when the content of G06B was 20%and the content of nano TiO_2 was 0.2%,the comprehensive performance of latex film was relatively optimal.
引文
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[3]胡哲,叶超贤,李红强.KH-570改性纳米二氧化钛的制备及其分散性研究[J].涂料工业,2011,41(11):41-44.
[4]Yang F,Zhu L,Han D.Effects of fluorine and silicon components on the hydrophobicity failure behavior of acrylic polyurethane coatings[J].Coat Technol Res,2017,14(3):691-699.
[5]Lei H,He D,Guo Y.Synthesis and characterization of UV-absorbing fluorine-silicone acrylic resin polymer[J].Applied Surface Science,2018,428:71-77.
[6]Li B,Li X,Zhang K.Synthesis of POSScontaining fluorosilicone block copolymers via RAFT polymerization for application as non-wetting coating materials[J].Progress in Organic Coatings,2015,78:188-199.
[7]Bu L,Xu W,Quan S.Improvement of charge storage characteristics of silicon based polyvinylidene fluoride thin film through heat treatment and multiple layer stack[J].Journal of Electrostatics,2016,81:9-14.
[8]Park Y G,Lee Y H,Rahman M M,et al.Preparation and properties of waterborne polyurethane/selfcross-linkable fluorinated acrylic copolymer hybrid emulsions using a solvent/emulsifierfree method[J].Colloid Polym Sci,2015,293:1369-1382.
[9]Leiza J R.Preparation of high solids content poly(n-butyl acrylate)latexes through miniemulsion polymerization[J].Journal of Applied Polymer Science,2015,64(9):1797-1809.
[10]Pal R.Modeling the Viscosity of Concentrated Nanoemulsions and Nanosuspensions[J].Fluids,2016,1(2):11.
[11]Yang W,Chen Y,Zhu L.Spherical and coreshell fluorinated polyacrylate latex particles:preparation and characterization[J].Colloid&Polymer Science,2015,293(8):2349-2357.