文章摘要
超疏水近红外吸收涂层的制备及性能表征
Preparation and Performance Characterization of Superhydrophobic Near- infrared Absorption Coating
投稿时间:2019-06-14  修订日期:2019-07-18
DOI:
中文关键词: 复合涂层  纳米SiO2  近红外吸收  超疏水  水接触角
英文关键词: composite coating  nano-SiO2  near-infrared absorption  superhydrophobic  water contact angle
基金项目:国家自然科学基金项目
作者单位E-mail
张伟钢 滁州学院 abczwg15@163.com 
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中文摘要:
      以纳米SiO2为微纳结构改性剂、聚二甲基硅氧烷(PDMS)为黏合剂、Sm2O3为功能颜料,通过合理的涂层结构设计,采用刮涂法制备得到了具有超疏水特性的PDMS/Sm2O3复合涂层。分析探讨了PDMS和Sm2O3配比、纳米SiO2添加量及表面微纳结构层对涂层性能的影响规律。结果表明:PDMS和Sm2O3配比(质量比)对涂层性能具有重要影响,当m(PDMS):m(Sm2O3)=6:4时,涂层对1.06 μm近红外光的反射率可低至58.8%,涂层的水接触角可达到113°,要明显高于传统聚氨酯基近红外吸收涂层的水接触角。通过在PDMS/Sm2O3复合涂层表面涂覆具有明显乳突状结构特征的PDMS/SiO2微纳结构层,可使涂层实现超疏水特性。PDMS/Sm2O3复合涂层表面经SiO2质量分数为30%的PDMS/SiO2微纳结构层涂覆后,其水接触角可增大到158°,滚动角可低至4°,同时具有较低的1.06 μm近红外反射率(61.4%)性能。
英文摘要:
      Through reasonable coating structural design, polydimethylsiloxane(PDMS)/Sm2O3 composite coating with superhydrophobic property was prepared by scratch coating method using nano-SiO2, PDMS and Sm2O3 particles as micro-nano structural modifier, adhesives and functional pigments, respectively. The effects of the ratio of PDMS to Sm2O3, the addition amount of nano-SiO2 and the surface micro-nano structural layer on the coating properties were discussed. The results show that the ratio of PDMS to Sm2O3 (mass ratio) has an important effect on the coating properties. When m(PDMS):m(Sm2O3)=6:4, the reflectance of the coating to the 1.06 μm near-infrared light can be as low as 58.8%. The water contact angle can reach 113°, which is significantly higher than the conventional polyurethane-based near-infrared absorption coatings. The superhydrophobic property of the coating can be achieved by coating a PDMS/SiO2 micro-nano structural layer with a distinct papillary structure on the surface of the PDMS/Sm2O3 composite coating. After the surface of PDMS/Sm2O3 composite coating is coated by PDMS/SiO2 micro-nano structural layer with SiO2 mass fraction of 30%, the water contact angle can be increased to 158°, the roll angle can be as low as 4°, and has lower reflectance (61.4%) to the 1.06 μm near-infrared light.
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