Durable and fluorine-free superhydrophobic coatings from palygorskite-rich spent bleaching earth | |
Department | 甘肃省黏土矿物应用重点实验室 |
Zhang, Penglin1; Dong, Shuantao1,2; Li BC(李步成)2; Wei, Xudong3; Zhang JP(张俊平)2; Zhang JP(张俊平) | |
The second department | 环境材料与生态化学研究发展中心 |
2018 | |
Source Publication | Applied Clay Science |
ISSN | 0169-1317 |
Volume | 157Pages:237-247 |
Abstract | With the increasing consumption of vegetable oils, value-added recycling of spent bleaching earth (SBE) is of wide concern. Here, we report a simple and sustainable method for converting SBE containing palygorskite (PAL) to hybrid carbon materials (PAL/C) with a nanorod-like structure, which can then be used as building blocks for the preparation of durable and fluorine-free superhydrophobic coatings. The PAL/C composites were prepared by calcination of the SBE containing PAL in air. Then, the homogeneous suspensions in ethanol were prepared by hydrolytic condensation of n-hexadecyltrimethoxysilane onto the PAL/C nanorods. Superhydrophobic coatings can be readily prepared by spray-coating the suspensions onto substrates. The PAL/C composites and the superhydrophobic coatings were characterized using a variety of analytical techniques including scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Superhydrophobicity of the coatings depends upon their surface topography, which can be precisely regulated by the calcination temperature of SBE and the concentration of the PAL/C composites in the suspensions. The superhydrophobic coatings show high water contact angle and extremely low sliding angle of 1.2°. The superhydrophobic coatings also feature high mechanical, thermal and chemical durability. This is because the PAL/C nanorods are closely linked and encapsulated together by polysiloxane (POS) among them, forming a highly crosslinked network. We believe that this study will shed light on the value-added recycling of SBE and cost-effective preparation of bioinspired antiwetting coatings. |
Keyword | Superhydrophobicity Palygorskite Surface Chemistry Silanes |
Subject Area | 环境材料与生态化学 |
DOI | 10.1016/j.clay.2018.02.018 |
Funding Organization | the “Hundred Talents Program” of the Chinese Academy of Sciences;Funds for Creative Research Groups of Gansu, China (17JR5RA306);the Talents of Innovation and Entrepreneurship Project of Lanzhou, China (2016-RC-77) |
Indexed By | SCI |
Language | 英语 |
Funding Project | 功能复合材料研究组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/23633 |
Collection | 甘肃省黏土矿物应用研究重点实验室 环境材料与生态化学研究发展中心 |
Corresponding Author | Zhang JP(张俊平) |
Affiliation | 1.College of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, PR China 2.Key Laboratory of Clay Mineral Applied Research of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China 3.Department of Otolaryngology-Head and Neck Surgery, Gansu Provincial Hospital, Lanzhou 730000, PR China |
Recommended Citation GB/T 7714 | Zhang, Penglin,Dong, Shuantao,Li BC,et al. Durable and fluorine-free superhydrophobic coatings from palygorskite-rich spent bleaching earth[J]. Applied Clay Science,2018,157:237-247. |
APA | Zhang, Penglin,Dong, Shuantao,Li BC,Wei, Xudong,Zhang JP,&张俊平.(2018).Durable and fluorine-free superhydrophobic coatings from palygorskite-rich spent bleaching earth.Applied Clay Science,157,237-247. |
MLA | Zhang, Penglin,et al."Durable and fluorine-free superhydrophobic coatings from palygorskite-rich spent bleaching earth".Applied Clay Science 157(2018):237-247. |
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