近红外反射超疏水黄色涂层的制备和性能

doi:10.11901/1005.3093.2021.466

材料研究学报

2022, Vol. 36

Issue (9): 687-698 DOI: 10.11901/1005.3093.2021.466

研究论文

本期目录 | 过刊浏览

近红外反射超疏水黄色涂层的制备和性能

程红杰, 刘黄娟, 姜婷, 王法军(

), 李文

江苏理工学院材料工程学院常州 213001

Preparation and Properties of Near-infrared Reflective Superhydrophobic Yellow Coating

CHENG Hongjie, LIU Huangjuan, JIANG Ting, WANG Fajun(

), LI Wen

School of Materials Engineering, Jiangsu University of Technology, Changzhou 213001, China

引用本文:

程红杰, 刘黄娟, 姜婷, 王法军, 李文. 近红外反射超疏水黄色涂层的制备和性能[J]. 材料研究学报, 2022, 36(9): 687-698.
Hongjie CHENG, Huangjuan LIU, Ting JIANG, Fajun WANG, Wen LI. Preparation and Properties of Near-infrared Reflective Superhydrophobic Yellow Coating[J]. Chinese Journal of Materials Research, 2022, 36(9): 687-698.

全文: PDF(25788 KB) HTML

摘要:

将钛铬棕粉末(TCB)、金红石型二氧化钛(TiO₂)、疏水纳米二氧化硅(SiO₂)与聚二甲基硅氧烷(PDMS)溶液混合,一步刷涂制备出超疏水黄色涂层,系统地研究了涂层的表面润湿性、疏水稳定性、耐紫外线老化性能、自清洁性能、以及近红外反射性能。结果表明,这种涂层的水接触角(CA)和滚动角(SA)分别为155.2°和5.4°；涂层在1.0 kPa的压力下经过2 m距离的砂纸磨损后和5 L的水流冲击后依然保持优异的疏水性,其附着力和硬度分别达到2级和6B等级；不同pH值的溶液在涂层表面都具有超疏水效果并具有化学稳定性；用紫外线照射240 h后涂层表面仍然保持极强的疏水性,表明其具有耐紫外线老化性能；涂层表面具有优异的自清洁性能,污染物极易地被水滴带走；涂层的近红外反射率和太阳反射率分别达到0.858和0.672,对普通水泥板具有明显的降温效果,在户外暴露和水流冲击后仍保持较高的反射率。

关键词 ：材料表面与界面, 超疏水涂层, 聚二甲基硅氧烷, 近红外反射, 超疏水稳定性, 自清洁

Abstract：

The superhydrophobic yellow coating was prepared by mixing titanium chromium brown powder (TCB), rutile titanium dioxide (TiO₂), hydrophobic nano silica (SiO₂) with polydimethylsiloxane (PDMS) solution and brush coating by one step. The surface wettability, hydrophobic stability, ultraviolet light aging resistance, self-cleaning performance and near-infrared reflection performance of the coating were systematically investigated. The results show that the water contact angle (CA) and roll angle (SA) of the coating are 155.2° and 5.4°, respectively; the coating retains excellent hydrophobicity after sandpaper wear at a distance of 2 m by 1.0 kPa and water impact at a distance of 5 L, meanwhile its adhesion and hardness reach grade 2 and 6B, respectively; the coating surface presents superhydrophobic effect and have chemical stability in solutions of different pH; The coating surface still retains strong hydrophobicity after ultraviolet light irradiation for 240 h, indicating that it has UV aging resistance; the coating surface has excellent self-cleaning performance, and the pollutants are easily carried away by water droplets; the near-infrared reflectance and solar reflectance of the coating are 0.858 and 0.672, respectively. The coating has obvious cooling effect on the ordinary cement board, and still maintains a high reflectance after outdoor exposure and water impact.

Key words： surface and interface of materials super hydrophobic coating polydimethylsiloxane Near infrared reflection robust superhydrophobicity self-cleaning

收稿日期: 2021-08-16

ZTFLH:

TB34

基金资助:国家自然科学基金(51801083);江苏省自然科学基金(BK20181044)

作者简介: 程红杰,男,1995,硕士生

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图1 疏水纳米SiO2粒子的TEM照片

图2 不同涂层的SEM照片

图3 TCB60-TiO240/PDMS涂层的表面润湿性

图4 TCB60-TiO240/PDMS涂层表面的示意图

图5 砂纸磨损示意图、磨损循环期间的CA和SA、水流冲击示意图以及水流冲击循环期间的CA和SA

图6 TCB60-TiO240/PDMS涂层经过1次和10次砂纸磨后的SEM照片

图7 附着力测试示意图、附着力测试后表面润湿性测试结果、硬度测试示意图和测试结果

图8 pH=1 HCl溶液、pH=7 NaCl溶液和pH=14 NaOH溶液的表面润湿性

图9 紫外线循环照射中涂层表面的CA和SA值、照射0 h和240 h后的涂层表面SEM照片

图10 不同基材的涂层经过10次砂纸磨损后的脱落率和紫外线照射240 h后的CA和SA

图11 不同涂层的光谱反射曲线、室外阳光照射时间对各种涂层表面温度的影响、TCB60-TiO240/PDMS涂层不同存放时间的光谱反射曲线以及水流冲击循环期间的NIR和SOLAR反射率

表2 不同涂层的光谱反射率和太阳反射率值

表3 TCB60-TiO240/PDMS涂层不同厚度的光谱反射率和太阳反射率值

图12 涂层的普通相机和红外相机照片

图13 TCB60-TiO240/PDMS涂层的自清洁性能

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