Evaporation Induced Flame Retardant Polyelectrolyte Complex for Cotton

IF 4.4 2区化学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Polymer Materials Pub Date : 2024-11-11 DOI:10.1021/acsapm.4c0293710.1021/acsapm.4c02937

Maya D. Montemayor, Danixa Rodriguez-Melendez, Edward Chang, Dallin L. Smith, Natalie A. Vest, Alexandra Moran, Bethany Palen and Jaime C. Grunlan*,

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引用次数: 0

Abstract

Cotton is one of the most used textiles due to its comfort and breathable nature, but it is extremely flammable. To reduce the flammability, a polyelectrolyte complex coating composed of polyethylenimine (PEI) and sodium hexametaphosphate (PSP) is deposited in a single step. Ammonia is used as a volatile base that evaporates to reduce the pH and induces complexation on the cotton surface. Cotton coated with a 1:2 molar ratio of PEI:PSP gains 28 wt % and reduces the total heat release by 93%, compared to neat cotton. The method of flame retardant action can be attributed to an effective intumescent coating. After five water rinses, the coated cotton maintains its flame retardant behavior, with only 7 wt % added to the textile, due to a more effective ionically cross-linked network. This study demonstrates, for the first time, an efficient and scalable evaporation induced polyelectrolyte complex coating that imparts self-extinguishing behavior to cotton and can be adapted for many other flammable materials.

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用于棉花的蒸发诱导型阻燃聚电解质复合物

棉花因其舒适透气的特性而成为最常用的纺织品之一，但它极易燃烧。为了降低易燃性，我们在一个步骤中沉积了由聚乙烯亚胺（PEI）和六偏磷酸钠（PSP）组成的聚电解质复合物涂层。氨用作挥发性碱，挥发后可降低 pH 值，并诱导棉花表面发生络合反应。与纯棉相比，涂有 1:2 摩尔比 PEI:PSP 的棉花可增加 28 重量%的热量，并将总热量释放量减少 93%。这种阻燃方法可归功于有效的膨胀涂层。经过五次水洗后，由于形成了更有效的离子交联网络，涂有涂层的棉花仍能保持其阻燃性能，只需在纺织品中添加 7 wt %。这项研究首次展示了一种高效、可扩展的蒸发诱导聚电解质复合物涂层，这种涂层可赋予棉花自熄特性，并可适用于许多其他易燃材料。

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来源期刊

ACS Applied Polymer Materials Multiple-

CiteScore

7.20

自引率

6.00%

发文量

810

期刊介绍： ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.