| 改性纳米SiO2/聚氨酯-含氟丙烯酸酯无皂乳液合成及其胶膜性能表征 |
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| 引用本文： | 周威,傅和青,颜财彬,陈焕钦.改性纳米SiO2/聚氨酯-含氟丙烯酸酯无皂乳液合成及其胶膜性能表征[J].化工学报,2013,64(6):2291-2299. |
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| 作者姓名： | 周威 傅和青 颜财彬 陈焕钦 |
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| 作者单位： | 华南理工大学化学与化工学院,广东 广州 510640 |
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| 摘 要： | 引言水性聚氨酯相对溶剂型聚氨酯具有不燃、气味小、不污染环境等优点1-2],从而广泛用于涂料3]、胶黏剂4]、油墨5]等领域。目前,常用于软包装领域的薄膜主要是表面能很低的非极性膜,而水性聚氨酯胶黏剂具有较高的表面自由能,对非极性膜的润湿性差,因此需要降低水性聚氨酯的表面张力,达到润湿非极性膜的目的。
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| 关 键 词： | 聚氨酯 纳米SiO2 含氟丙烯酸酯 核壳结构 无皂乳液 |
| 收稿时间： | 2012-11-12 |
| 修稿时间： | 2012-12-29 |
Synthesis and characterization of self-emulsified nano-SiO2/polyurethane-fluorinated polyacrylate hybrid latexes and their films |
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| ZHOU Wei
,
FU Heqing
,
YAN Caibin
,
CHEN Huanqin.Synthesis and characterization of self-emulsified nano-SiO2/polyurethane-fluorinated polyacrylate hybrid latexes and their films[J].Journal of Chemical Industry and Engineering(China),2013,64(6):2291-2299. |
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| Authors: | ZHOU Wei FU Heqing YAN Caibin CHEN Huanqin |
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| Affiliation: | School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China |
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| Abstract: | SiO2/polyurethane (SiO2/PUL) latexes modified by nano-SiO2 (treated with γ-amino propyltriethoxy silane (KH550)) and end capped by hydroxyethyl methacrylate (HEMA) were first prepared through the prepolymer process.Then a series of nano-SiO2/polyurethane-fluorinated polyacrylate (SiO2/PUFA) hybrid latexes were synthesized via the seed emulsion polymerization process using hexafluorobutyl methacrylate (HFMA) as modifier, SiO2/PUL as macromolecule emulsifier and seed emulsion.The properties of nano-SiO2/PUFA emulsions and their films were characterized by Fourier transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), contact angle (CA),differential scanning calorimetry (DSC), thermogravimetry (TG) and tensile test machine.FT-IR characterization demonstrated that the polyurethane (PU) was successfully modified by modified nano-SiO2 and HFMA.TEM result indicated that the nano-SiO2 treated with KH550 was well dispersed in ethanol.Particle morphology of hybrid latex showed inverse core-shell structure, in which the core region was formed by acrylate (PA), while the shell region was formed by PU.TG result showed that the thermal stability of the latexes film was obviously improved by nano-SiO2 particles.Water resistance and mechanical properties of nano-SiO2/PUFA films were greatly improved due to the multiple cross-linking formed by modified nona-SiO2 and fluorinated acrylate through the chemical bonds with polyurethane chains. |
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| Keywords: | polyurethane nano-SiO2" target="_blank">2')" href="#">nano-SiO2 fluorinated acrylate core-shell structure emulsifier-free emulsion |
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