| 超临界CO2快速膨胀法制备SiO2/聚氨酯超疏水涂层 |
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| 引用本文： | 张发兴,卫晓利,肖忠良,程德军,闫承磊.超临界CO2快速膨胀法制备SiO2/聚氨酯超疏水涂层[J].化工学报,2012,63(7):2290-2297. |
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| 作者姓名： | 张发兴 卫晓利 肖忠良 程德军 闫承磊 |
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| 作者单位： | 1.中北大学化工与环境学院；2四川理工学院材料与化学工程学院；3北京玻钢院复合材料有限公司 |
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| 基金项目： | 山西省研究生立项优秀创新项目 |
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| 摘 要： | 用超临界CO2快速膨胀法制备了SiO2/聚氨酯超疏水涂层。首先用十三氟辛基三乙氧基硅烷（F-硅烷）和γ-(甲基丙烯酰氧基)丙基三甲氧基硅烷（KH-570）改性纳米二氧化硅，制备出含双键的纳米二氧化硅粒子，将其分散在超临界CO2中，再利用超临界CO2快速膨胀法将其喷射到双键封端的且已添加了引发剂的聚氨酯涂层表面，通过加热，使纳米二氧化硅粒子接枝在聚氨酯涂层表面，形成稳固粗糙结构，获得了超疏水性质。研究了喷嘴温度、反应釜温度和压力、偶联剂配比、表面粗糙度对涂层疏水性的影响。结果表明：涂层的静态水接触角可达到169.1°±0.6°；在喷嘴和釜内温度都为90℃，釜内压力为16 MPa，F-硅烷和KH-570配比为1∶1，表面粗糙度为7.3 μm时，所制得涂层具有较好的超疏水性，且具有优良的耐刮伤性。该法高效环保，涂层性能优良，适于大面积制备。
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| 关 键 词： | 超疏水 超临界CO2 涂层 RESS法 水性聚氨酯 |
| 收稿时间： | 2011-11-24 |
| 修稿时间： | 2012-03-01 |
Preparation of SiO2/PU superhydrophobic coating using rapid expansion of supercritical CO2 |
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| ZHANG Faxing
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WEI Xiaoli
,
XIAO Zhongliang
,
CHENG Dejun
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YAN Chenglei.Preparation of SiO2/PU superhydrophobic coating using rapid expansion of supercritical CO2[J].Journal of Chemical Industry and Engineering(China),2012,63(7):2290-2297. |
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| Authors: | ZHANG Faxing WEI Xiaoli XIAO Zhongliang CHENG Dejun YAN Chenglei |
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| Affiliation: | 1School of Chemical Engineering & Environment,North University of China,Taiyuan 030051,Shanxi,China; 2Department of Material & Chemical Engineering,Sichuan Institute of Technology,Zigong 643000,Sichuan,China; 3Beijing Glass Composite Material Co.,Ltd.,Beijing 102101,China) |
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| Abstract: | The SiO2/PU superhydrophobic coatings were prepared by using rapid expansion of supercritical CO2.Firstly, by modifying nano-silica with thirteen fluoride octyltriethoxysilane(F-silane)andγ-(methacryloyloxy-oxy)propyl trimethoxysilane (KH-570), nano-silica particles containing double bonds were prepared and then were dispersed in supercritical CO2.At the same time, a polyurethane coating containing double bond and an initiator was prepared.Subsequently, the nano-silica particles were injected onto the polyurethane coating surface making use of rapid expansion of supercritical CO2, and then were dried by heating to form a stable rough structure because of the nano-silica particles being grafted on the polyurethane coating.This way, a SiO2/PU film with superhydrophobic surface was obtained.Moreover, the effect of nozzle temperature, reaction kettle temperature and pressure, ratio of coupling on coating hydrophobicity and surface roughness were studied.The results showed that the static water contact angle of the coating could be up to 169.1°±0.6°.When the temperature of the nozzle and the reaction kettle were all 90℃, the reaction kettle pressure was 16 MPa and ratio of F-silane to KH-570 was 1∶1, the surface roughness was 7.3 μm, the obtained film had good super-hydrophobicity, and had excellent scratch resistance.In addition, the superhydrophobic coating had good performance and was environmental, and also could be produced cost-effectively on a large scale. |
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| Keywords: | superhydrophobic supercritical CO2" target="_blank">2')" href="#">supercritical CO2 coating RESS water-based polyurethane |
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