KH560改性纳米硅溶胶对苯丙涂层性能的影响

发布时间：2018-01-05 03:18

本文关键词：KH560改性纳米硅溶胶对苯丙涂层性能的影响　出处：《表面技术》2017年08期 　论文类型：期刊论文

【摘要】：目的提高硅溶胶-苯丙复合涂层的综合性能,为有机-无机复合涂层的应用提供一定的参考意义。方法采用水浴加热机械搅拌/超声分散法,用KH560对硅溶胶进行表面改性,并将改性前后的硅溶胶与苯丙乳液共混,制备了含改性前后硅溶胶15%、30%、45%(质量分数,全文同)的硅溶胶-苯丙复合涂层。用红外光谱仪证实改性成功。用紫外/可见/近红外分光光度计、力学性能测试仪、扫描电子显微镜对改性前后硅溶胶-苯丙复合涂层综合性能及微观结构进行表征。结果含有改性后硅溶胶的复合涂层综合性能得到明显提高,当改性硅溶胶掺量为30%时,复合涂层综合性能最好,此时复合涂层磨耗值为0.078 g,附着力为1级,抗冲击性为62 mm,拉伸强度为4.74 MPa,断裂伸长率为215.90%,附着力、抗冲击性、拉伸强度和断裂伸长率分别比相同掺量下未改性硅溶胶复合涂层提高1级、6 mm、0.59 MPa和10.34%。结论 KH560可成功地对硅溶胶进行表面改性,将改性后的硅溶胶替代未改性的硅溶胶可提高硅溶胶-苯丙复合涂层的综合性能,实际应用时改性硅溶胶掺量以30%为宜。
[Abstract]:Objective to improve the comprehensive performance of silica sol and styrene acrylic composite coatings, provide certain reference significance for application of organic inorganic composite coating. Using the method of water bath heating / mechanical stirring ultrasonic dispersion method, surface modification of silica sol with KH560, and the modified silica sol and styrene acrylic emulsion and preparation. The modified silica sol containing 15%, 30%, 45% (mass fraction, the same) the silica sol styrene acrylic composite coating. The modified successfully confirmed by infrared spectroscopy. Using UV / Vis / NIR spectrophotometer, mechanical properties tester, scanning electron microscope and microstructure of modified the comprehensive performance of silica sol and styrene acrylic composite coatings were characterized. The modified composite coating containing silica sol comprehensive properties were obviously improved and the modified silica sol content is 30%, the comprehensive performance of the composite coating is best, the composite coating wear value is 0.078 g, Adhesion level is 1, the impact resistance is 62 mm, the tensile strength is 4.74 MPa, the elongation is 215.90%, adhesion, impact resistance, tensile strength and elongation were higher than the same content of non modified silica sol composite coating increased by 1 grade, 6 mm, 0.59 MPa and 10.34%. conclusion KH560 can modify the surface the silica sol successfully, the modified silica sol substitute after unmodified silica sol can improve the silica sol styrene acrylate composite coating performance, the practical application of modified silica sol dosage is suggested to be 30%.

【作者单位】：解放军后勤工程学院;中国人民解放军62026部队;
【分类号】：TB306
【正文快照】： Received:2017-02-25;Revised:2017-03-25纳米硅溶胶与高分子有机聚合物共混而成的有机-无机复合材料兼备二者的优点[1-4],拉伸强度、耐磨性、流变性、抗老化等性能得到有效提高[5],广泛应用于塑料、橡胶、纤维和涂料等领域[6-7]。然而,二氧化硅表面存在大量羟基[8],亲水性强,

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