Superhydrophobic coating with excellent robustness and UV resistance fabricated using hydrothermal treated lignin nanoparticles by one-step spray
Superhydrophobic coating with excellent robustness and UV resistance fabricated using hydrothermal treated lignin nanoparticles by one-step spray
复制标题
使用水热处理的木质素纳米颗粒通过一步喷涂制备的具有优异坚固性和抗紫外线性的超疏水涂层
DOI：
10.1007/s10853-022-07787-4
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发表时间：
2022-10
影响因子：
4.5
通讯作者：
Jingda Huang
中科院分区：
文献类型：
--
作者：
Changying Ren;Mengmeng Li;Wentao Huang;Yingting Zhang;Jingda Huang
近年来已成功制备出稳定性好、步骤简单的超疏水表面，但仍存在环保性低、耐老化性差、耐磨性弱等问题。为解决上述问题，以生物质有机颗粒（水热处理木质素纳米球）代替无机颗粒为主要材料，采用简便的一步喷雾法制备了无氟超疏水涂层。以甲基三甲氧基硅烷和十六烷基三甲氧基硅烷为复合改性剂，纳米纤维素晶体为增强剂，PDMS为粘合剂，与HLNPs混合，喷涂在木材表面。由于HLNPs的苯环、双键、羰基等官能团具有良好的紫外线吸收能力，因此制备的HLNPs基超疏水涂层具有良好的耐磨性，在恶劣条件下可承受24次的磨损循环，并且表现出优异的抗紫外线性能，直到1000 W功率的超紫外光照射8 h后才失去超疏水性能。水热处理后的LNP由于分子间形成共价力和非共价力以及分子间距离的缩短而提高了其性能。此外，基于hlnps的超疏水涂层具有环境友好和制备简便的优点，具有很大的应用潜力。
Superhydrophobic surfaces with good stability and simple step have been successfully prepared in recent year, but still suffering from low environmentally friendly method, poor ageing resistance and weak abrasion resistance. To address the above issues, biomass organic particles (hydrothermal treated lignin nanospheres (HLNPs)) instead of inorganic particles were used as the main material to prepare a fluorine-free superhydrophobic coating by facile one-step spray. The Methyltrimethoxysilane and Hexadecyltrimethoxysilane were taken as the combined modifiers, nanocellulose crystals as the reinforcer and PDMS as the adhesive were mixed with HLNPs and sprayed onto the wood surface. The resulting HLNPs-based superhydrophobic coating showed good abrasion resistance and withstood abrasion cycles of 24 times under harsh conditions, as well as displaying excellent UV resistance and did not lose superhydrophobic property until UV radiation for 8 h under the super UV light (power of 1000 W) due to the functional groups of HLNPs such as the benzene ring, double bond and carbonyl group et al. having good UV absorption. LNP after hydrothermal treatment enhance its performance due to the formation of covalent-non-covalent forces between molecules and the shorter intermolecular distance. Besides, with the advantages of environmentally friendly and facile preparation, the HLNPs-based superhydrophobic coating could be deduced to have great potential applications.
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