Facile preparation and property analyses of L-CNC/SiO2-based composite superhydrophobic coating
Facile preparation and property analyses of L-CNC/SiO2-based composite superhydrophobic coating
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L-CNC/SiO2基复合超疏水涂层的简易制备及性能分析
DOI：
10.1007/s11706-022-0626-4
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发表时间：
2022-12
影响因子：
2.7
通讯作者：
Jingda Huang
中科院分区：
文献类型：
--
作者：
Wentao Huang;Qihui Ye;Changying Ren;Youwei Lu;Yuxin Cai;Wenbiao Zhang;Jingda Huang
近年来，超疏水涂料因其具有防水、防潮、自清洁等功能而受到广泛关注，但由于其制备工艺复杂、力学性能低、抗紫外线能力差等缺点，影响了超疏水涂料的广泛应用。以含少量木质素的纤维素纤维素（L-CNC）/SiO2复合粒子为主要原料，聚二甲基硅氧烷（PDMS）为粘合剂，全氟辛基三氯硅烷（FOTS）为改性剂，采用一步喷涂法制备超疏水涂层。所得涂层显示出优异的超疏水性（水接触角（WCA）为161°，滑动角（SA）为7°）和高耐磨性（能够在50 g载荷下经受50次磨损循环）。此外，在暴露于UV光（1000 W）下5 h后，其仍保持良好的超疏水性，显示出其良好的抗UV性。该研究为简单制备具有高耐磨性和良好抗紫外性能的有机-无机复合超疏水涂层提供了理论和技术参考，有利于提高超疏水涂层的实用性，拓宽其应用范围。
In recent years, superhydrophobic coatings have received extensive attention due to their functions of waterproof, antifouling, self-cleaning, etc. However, wide applications of superhydrophobic coatings are still affected by their disadvantages of complex preparation, low mechanical properties, and poor ultraviolet (UV) resistance. In this study, cellulose nanocrystal containing a small amount of lignin (L-CNC)/SiO2composite particles were used as the main material, polydimethylsiloxane (PDMS) as the adhesive and perfluorooctyltrichlorosilane (FOTS) as the modifier to prepare superhydrophobic coatings by a one-step spray method. The resulted coating showed excellent superhydrophobicity (water contact angle (WCA) of 161° and slide angle (SA) of 7°) and high abrasion resistance (capable of withstanding 50 abrasion cycles under the load of 50 g). Moreover, it still maintained good superhydrophobicity after 5 h of exposure to the UV light (1000 W), displaying its good UV resistance. This study provides theoretical and technical reference for the simple preparation of organic-inorganic composite superhydrophobic coatings with high abrasion resistance and good UV resistance, which is beneficial to improving the practicability and broadening the application scope of superhydrophobic coatings.
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