State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China.
State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China.
Carbohydr Polym. 2021 Nov 1;271:118410. doi: 10.1016/j.carbpol.2021.118410. Epub 2021 Jul 8.
High-performance nano-based superhydrophobic coatings have attracted tremendous attention in a wide range of sectors. As a biodegradable and low-cost natural polymer, starch nanoparticles (SNPs) exhibit significant potential for use in many advanced materials. However, nano-starch based superhydrophobic coatings have not yet been reported. Herein, SNPs/polydimethylsiloxane composites were applied to fabricate these coatings using an environmentally friendly approach. The coating exhibited superhydrophobic (water contact angle >152.0° and sliding angle <9.0°) and self-cleaning properties owing to the hierarchical micro and nanostructures formed by coralloid SNP aggregates combined with the low surface energy of the PDMS covering. Meanwhile, the strong adhesion of PDMS and chemical bonding of SNPs with PDMS endowed the coatings with mechanical and chemical robustness. The excellent oil-water separation abilities of the coating were also comprehensively confirmed. This coating shows the potential application in the development of eco-friendly self-cleaning materials and oily wastewater treatment.
高性能纳米基超疏水涂层在众多领域引起了极大关注。作为一种可生物降解且低成本的天然聚合物，淀粉纳米颗粒（SNP）在许多先进材料中的应用具有重要潜力。然而，基于纳米淀粉的超疏水涂层尚未见报道。在此，使用环保的方法，将 SNP/聚二甲基硅氧烷复合材料应用于制备这些涂层。由于珊瑚状 SNP 聚集体形成的分层微观和纳米结构以及 PDMS 覆盖层的低表面能，该涂层表现出超疏水性（水接触角>152.0°且滑动角<9.0°）和自清洁性能。同时，PDMS 的强附着力和 SNP 与 PDMS 的化学键合赋予了涂层良好的机械和化学稳定性。该涂层还全面证实了其优异的油水分离能力。这种涂层有望应用于开发环保型自清洁材料和含油废水处理。
