海泡石超疏水复合涂层的制备和性能

doi:10.11901/1005.3093.2021.205

材料研究学报

2021, Vol. 35

Issue (12): 942-950 DOI: 10.11901/1005.3093.2021.205

研究论文

本期目录 | 过刊浏览

海泡石超疏水复合涂层的制备和性能

王扬, 张磊, 王磊, 张妍, 汤庆国(

), 杜特, 焦万学, 冯雪彬

河北工业大学材料科学与工程学院天津 300400

Preparation and Properties of Sepiolite Superhydrophobic Composite Coating

WANG Yang, ZHANG Lei, WANG Lei, ZHANG Yan, TANG Qingguo(

), DU Te, JIAO Wanxue, FENG Xuebin

School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300400, China

引用本文:

王扬, 张磊, 王磊, 张妍, 汤庆国, 杜特, 焦万学, 冯雪彬. 海泡石超疏水复合涂层的制备和性能[J]. 材料研究学报, 2021, 35(12): 942-950.
Yang WANG, Lei ZHANG, Lei WANG, Yan ZHANG, Qingguo TANG, Te DU, Wanxue JIAO, Xuebin FENG. Preparation and Properties of Sepiolite Superhydrophobic Composite Coating[J]. Chinese Journal of Materials Research, 2021, 35(12): 942-950.

全文: PDF(6094 KB) HTML

摘要:

在不同条件下在有机化改性的海泡石粉体悬浮液中加入表面活性剂进行偶联改性，然后进行超声、离心脱水、洗涤、干燥和研磨制得粉体，再使用无水乙醇和分散制成涂料，将涂料涂敷于载玻片表面制备出海泡石超疏水涂层。使用OCA 20接触角测试仪测试涂层与水的接触角(CA)和滚动角(SA)，使用BRUKER-80v傅里叶红外光谱仪分析改性前后的粉体表面官能团的结构，用ESCALAB 250XI X射线光电子能谱仪分析改性前后粉体表面元素的状态变化，用Nova Nano SEM450扫描电镜和JEM-1230透射电镜观察改性前后的粉体的微观形貌，研究了海泡石超疏水复合涂层的性能。结果表明：当改性剂十六烷基三甲氧基硅烷添加量为0.8 mL、海泡石添加量为1.00 g、在0℃改性3 h时，涂层的接触角为157.2°，滚动角为10.5°。海泡石表面吸附二氧化硅颗粒后，构筑了表面粗糙结构并被十六烷基三甲氧基硅烷长链烷基接枝。涂层对水滴的粘附力随着水滴体积的增大先快速减小然后缓慢减小，涂层对水滴的粘附力较小，有助于水滴在涂层上滚动而使其具有良好的自清洁性能。

关键词 ：无机非金属材料, 超疏水, 改性复合, 海泡石, 涂层

Abstract：

The suspension of sepiolite powder in the mixture of anhydrous ethanol, ammonia and ethyl orthosilicate was first prepared and then coupling modified with surfactant in varying process conditions. Further, the modified sepiolite powder was acquired from the prepared suspension by means of ultrasonic assisted stirring, centrifugal dehydration, washing, drying and grinding successively. The modified sepiolite powder was dispersed in anhydrous ethanol and applied on the surface of glass slide to prepare a thin superhydrophobic coating. The contact angle (CA) and rolling angle (SA) of the coating with water were measured by using OCA 20 contact angle tester, the structure of functional groups on the surface of powders before and after modification was analyzed by Bruker-80V Fourier transform infrared spectrometer, the changes of elements on the surface of powders before and after modification were analyzed by Escalab 250XI X-ray photoelectron spectroscopy, the micromorphology of the powders before and after modification was observed by Nova Nano SEM450 and JEM-1230 transmission electron microscopy, and the properties of sepiolite superhydrophobic composite coating were investigatied. The results show that: when the modification is carried out at 0℃ for 3 h, with 1 g of sepiolite powder as raw material and 0.8 mL of cetyltrimethoxy silane as modifier. A coating made of the modified sepiolite powder presents a contact angle of 157.2° with a rolling angle of 10.5°. During modification process SiO₂ particles were adsorbed on the surface of sepiolite to create a rough surface, which was grafted with long chain alkyl groups of cetyltrimethoxy silane. The adhesion of water droplets to the coating surface decreases rapidly first and then slowly with the increase of the volume of water droplets. Due to the weak adhesion of water droplets to the coating, the water droplets can easy roll on the coating surface, so that resulted in good self-cleaning performance of the coating.

Key words： inorganic non-metallic materials superhydrophobic modified composite sepiolite coating

收稿日期: 2021-03-29

ZTFLH:

TB33

基金资助:河北工业大学大学生创新创业训练计划(S201910080033)

作者简介: 王扬，男，1999年生，本科生

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.205 或 https://www.cjmr.org/CN/Y2021/V35/I12/942

图1 改性温度对涂层疏水性能的影响

图2 改性时间对涂层疏水性能的影响

图3 海泡石的含量对涂层疏水性能的影响

图4 改性剂的添加量对涂层疏水性能的影响

图5 改性剂的添加量对粉体表面官能团的影响

图6 改性时间对粉体表面官能团的影响

图7 改性对粉体化学组成的影响

图8 海泡石超疏水复合粉体改性的机理

图9 改性对粉体形貌和粗糙度的影响

图10 涂层与水滴粘附过程的照片

图11 涂层对水滴的粘附力

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