Cellulose ( IF 4.9 ) Pub Date : 2021-09-06 , DOI: 10.1007/s10570-021-04177-y Dongqiao Zhang 1, 2, 3, 4 , Brandon L. Williams 1, 2 , Jingjing Liu 1, 2 , Zaili Hou 1, 2 , Andrew T. Smith 1, 2 , Zain Nasir 1, 2 , Harsh Patel 1, 2 , Anthony Partyka 1, 2 , Elaina M. Becher 1, 2 , Benjamin J. Lofink 1, 2 , Victor H. Santos 1, 2 , Luyi Sun 1, 2 , Xiaohong Peng 3 , Sunghyun Nam 5
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Surface modification is a main approach for natural polymers to gain flame retardancy. Developing a green coating system to endow natural polymers with flame retardancy and wash-durability is extremely challenging. Herein, a sandwich-like structured nanocoating system with mutual restricted network through electrostatic interaction, hydrogen bonding, and chemical bonding were designed via multi-layered coating and UV curing. The coated natural cotton fabrics demonstrated exellent flame retardancy, wash durability, and hydrophobicity. The chemicals involved include montmorillonite (MMT), ammonium polyphosphate (APP), acrylated polyurethane (PU), branched polyethylenimine (bPEI), and polydimethylsiloxane (PDMS). The concentration of bPEI governed the wash durability of the coated fabrics, and those samples with a higher concentration of bPEI possessed better wash durability. Meanwhile, bPEI served as a flammable resource to deteriorate the flame retardant performance. The systematic evaluations of the coated fabrics after washing demonstrated that this coating system can maintain balanced wash durability and flame retardancy.
Graphic abstract
中文翻译：
一种环保的三明治状结构纳米涂层系统，用于耐洗、阻燃和疏水的棉织物
表面改性是天然聚合物获得阻燃性的主要途径。开发绿色涂料体系以赋予天然聚合物阻燃性和耐洗性极具挑战性。在此，通过多层涂层和紫外线固化，设计了一种通过静电相互作用、氢键和化学键相互限制网络的三明治状结构纳米涂层系统。涂层天然棉织物表现出优异的阻燃性、耐洗性和疏水性。涉及的化学品包括蒙脱石 (MMT)、聚磷酸铵 (APP)、丙烯酸酯化聚氨酯 (PU)、支化聚乙烯亚胺 (bPEI) 和聚二甲基硅氧烷 (PDMS)。bPEI 的浓度控制着涂层织物的耐洗性，而那些 bPEI 浓度较高的样品具有更好的耐洗性。同时，bPEI 作为易燃资源会降低阻燃性能。洗涤后涂层织物的系统评估表明，该涂层体系可以保持平衡的耐洗性和阻燃性。
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