Construction of HLNPs/Fe3O4 based superhydrophobic coating with excellent abrasion resistance, UV resistance, flame retardation and oil absorbency
Construction of HLNPs/Fe3O4 based superhydrophobic coating with excellent abrasion resistance, UV resistance, flame retardation and oil absorbency
复制标题
具有优异耐磨性、抗紫外线性、阻燃性和吸油性的HLNPs/Fe3O4基超疏水涂层的构建
DOI：
10.1016/j.jece.2022.109046
复制
发表时间：
2022-11-29
影响因子：
7.7
通讯作者：
Wang, Siqun
中科院分区：
文献类型：
--
作者：
Huang, Jingda;Li, Mengmeng;Wang, Siqun
超疏水涂料存在机械强度低、稳定性差、易老化、环保性能不足等问题，限制了它们的进一步应用。此外，开发多功能超疏水涂料也是一种趋势。为了改善上述问题，采用溶剂置换法和水热反应法制备了生物质颗粒（水热处理木质素纳米颗粒（HLNPs）/Fe 3 O 4），并以纳米纤维素晶体（CNC）和TiO 2为包覆剂，PDMS为粘合剂，采用一步喷涂或浸渍法制备了HLNPs/Fe 3 O 4基磁性超疏水涂层。所得木材具有167度的水接触角（WCA）和5度的滑动角（SA），并且显示出优异的耐磨性和突出的抗紫外线（UV）性。由于CNC和TiO 2的协同增强作用，它可以抵抗87次磨损循环，并且由于木质素分子的强烈紫外吸收，可以承受9 h的超高紫外线（1000 W）辐射。聚氨酯海绵对四种不同的油的吸附效率为17.17-24.78 g/g，并且可以用磁铁回收。此外，在无机粒子和木质素的共同作用下，超疏水磁性聚氨酯海绵表现出优异的阻燃性能，极限氧指数（LOI）值达到27.3%。该研究有助于促进有机@无机复合超疏水涂料的开发和完善，为木质素的高值化利用提供新的途径。
Superhydrophobic coatings are suffering from low mechanical strength, poor stability, easy aging, and insufficient environmental performance, etc., limiting their further application. In addition, developing multifunctional superhydrophobic coatings is a trend. To improve the above problems, the biomass particles (hydrothermal treated lignin nanoparticles (HLNPs)/Fe3O4) were prepared by solvent displacement and hydrothermal reaction and used as the main materials, both nanocellulose crystals (CNC) and TiO2 as the reinforcers, PDMS as the adhesive to prepare the HLNPs/Fe3O4 based magnetic and superhydrophobic coating only by one-step spray or dip. The resulted wood had the water contact angle (WCA) of 167 degrees and the slide angle (SA) of 5 degrees and showed excellent abrasion resistance and outstanding ultraviolet (UV) resistance. It could resist 87 abrasion cycles due to the synergistic enhancement of both CNC and TiO2 and withstood ultra-high UV (1000 W) radiation of 9 h due to the strong UV absorption of lignin molecules. And the resulted polyurethane (PU) sponge demonstrated highly effective oil absorbency with the absorption efficiency of 17.17-24.78 g/g for four different oils and could be recovered using a magnet. Besides, under the combined effect of inorganic particles and lignin, the super-hydrophobic and magnetic PU sponge displayed outstanding flame retardation and the limited oxygen index (LOI) value reached 27.3%. This study would help promote the development and improvement of organic@inorganic composite superhydrophobic coatings and provide a new way for the high-value utilization of lignin.