燃烧合成疏水BN粉体和超疏水涂层的制备及其性能表征

doi:10.15541/jim20220221

无机材料学报 ›› 2022, Vol. 37 ›› Issue (10): 1037-1042.DOI: 10.15541/jim20220221 CSTR: 32189.14.10.15541/jim20220221

• 研究论文 • 下一篇

燃烧合成疏水BN粉体和超疏水涂层的制备及其性能表征

孟晴¹^,²(), 李江涛¹^,²()

1.中国科学院理化技术研究所低温工程重点实验室, 北京 100190
2.中国科学院大学材料科学与光电技术学院, 北京 100049

收稿日期:2022-04-15 修回日期:2022-05-07 出版日期:2022-10-20 网络出版日期:2022-05-27
通讯作者: 李江涛,研究员. E-mail: lijiangtao@mail.ipc.ac.cn
作者简介:孟晴(1994-), 女, 博士研究生. E-mail: mengqing17@mails.ucas.ac.cn
基金资助:
国家自然科学基金重点项目(52072381);国家自然科学基金重点项目(U1904217)

Hydrophobic BN Powders by Combustion Synthesis and Its Super-hydrophobic Coatings: Preparation and Property

MENG Qing¹^,²(), LI Jiangtao¹^,²()

1. Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2022-04-15 Revised:2022-05-07 Published:2022-10-20 Online:2022-05-27
Contact: LI Jiangtao, professor. E-mail: lijiangtao@mail.ipc.ac.cn
About author:MENG Qing (1994-), female, PhD candidate. E-mail: mengqing17@mails.ucas.ac.cn
Supported by:
National Natural Science Foundation of China(52072381);National Natural Science Foundation of China(U1904217)

摘要/Abstract

摘要：

具有分级结构的BN纳米薄膜展现出优异的超疏水性, 但由于该薄膜的制备过程复杂、成本昂贵, 不适宜大规模的生产和应用。与之相比, 基于疏水BN粉体的超疏水涂层的应用会更为便捷。本研究采用镁热还原氮化燃烧合成法结合酸洗工艺制备了疏水的单相BN粉体, 水接触角为(144.6±2.4)°, 疏水性可以归因于BN粉体颗粒具有的微纳分级结构。在此基础上, 以这种燃烧合成的疏水BN粉体为填料制备的BN/氟硅树脂复合涂层进一步表现出超疏水性, 其中质量分数30% BN/FSi树脂涂层的水接触角为(151.2±0.7)°, 滚动角约为8°。该涂层与文献报道的通过CVD方法制备的BN纳米薄膜的性能相当, 但工艺更加简单。这是一种利用陶瓷粉体的疏水性来制备超疏水有机无机复合涂层的简便易行的新方法, 有望获得广泛的工程应用。

关键词: 燃烧合成, BN, 疏水, 超疏水涂层

Abstract:

BN nanofilms with hierarchical structure exhibite super-hydrophobicity, but they are not suitable for the large-scale production and application due to their complicated preparation process and expensive cost. Compared with common BN nanofilms, the application of super-hydrophobic coatings based on hydrophobic BN powders are more convenient. Herein, the hydrophobic single-phase BN powders were prepared by combustion synthesis method through magnesiothermic reduction reaction and acid washing, showing the water contact angle at (144.6±2.4)°. Their hydrophobic character lies in the micro-nano hierarchical structure of BN particles. The super-hydrophobic BN/fluorosilicone resin coatings were prepared using the combustion-synthesized hydrophobic BN powders as fillers. The water contact angle and sliding angle for 30% BN/fluorosilicone resin coatings (in mass) are (151.2±0.7)° and 8°, respectively, which are comparable to that of BN nanofilms fabricated by CVD method reported in the literature. This method is a convenient way to prepare super-hydrophobic organic-inorganic composite coatings by utilizing the hydrophobicity of ceramic powders. Therefore, hydrophobic BN powders and super-hydrophobic BN/fluorosilicone resin coatings are expected to have wide application.

Key words: combustion synthesis, BN, hydrophobicity, super-hydrophobic coating

中图分类号:

TB34

孟晴, 李江涛. 燃烧合成疏水BN粉体和超疏水涂层的制备及其性能表征[J]. 无机材料学报, 2022, 37(10): 1037-1042.

MENG Qing, LI Jiangtao. Hydrophobic BN Powders by Combustion Synthesis and Its Super-hydrophobic Coatings: Preparation and Property[J]. Journal of Inorganic Materials, 2022, 37(10): 1037-1042.

图/表 4

图1 燃烧合成粉体盐酸酸洗前(a)酸洗后(b)的XRD图谱

Fig. 1 XRD patterns of combustion synthesized powders before (a) and after (b) acid washing

图2 MgO-BN复相陶瓷粉体和BN粉体的表征

Fig. 2 Characterization of MgO-BN powders and BN powders (a) SEM image, (b) TEM image and (c) EDS element mappings of MgO-BN powders; (d) SEM image, (e) TEM image (inset is SAED pattern of B region), and (g) HRTEM image of A region in Fig.(e) of BN powders

图3 水滴在BN粉体表面的(a)形貌照片和(b)接触角, (c)BN粉体漂浮在水面的效果照片, (d)将粘附BN粉体的玻璃板浸入水中后表面附着了大量气泡的照片

Fig. 3 (a) Photo and (b) contact angle of water droplet on the surface of BN powders, photos of (c) BN powders floated on water without any submersion and (d) a large number of bubbles attached to the surface of BN powders adhering to the glass slide

图4 (a) BN/FSi树脂涂层表面的水接触角与BN固含量的关系曲线, (b) 30% BN/FSi树脂涂层表面的SEM照片(黄色箭头标注直立的BN纳米片), (c) 10 μL水滴在30% BN/FSi树脂涂层表面的滚动角, (d) 30% BN/FSi树脂涂层表面的自清洁效果

Fig. 4 (a) Relationship between water contact angle of BN/FSi coating surface and BN solid content, (b) SEM image of 30% BN/FSi resin coating surface (yellow arrows pointing the upright BN nanosheets), (c) sliding angle of 10 μL water droplet on 30% BN/FSi resin coating surface, and (d) self-cleaning effect of 30% BN/FSi coating

参考文献 22

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燃烧合成疏水BN粉体和超疏水涂层的制备及其性能表征

Hydrophobic BN Powders by Combustion Synthesis and Its Super-hydrophobic Coatings: Preparation and Property

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