Yazhini K Bharathi, Wang Xin, Zhou Qixing, Stevy Brim Ondon
Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), College of Environmental Science and Engineering, Nankai University Tianjin 300071 China
RSC Adv. 2021 Nov 11;11(58):36379-36390. doi: 10.1039/d1ra07460a. eCollection 2021 Nov 10.
Cotton is one of the most important raw materials for textile and clothing production. The main drawbacks of cotton fibers are their poor mechanical properties and high flammability. Compared with some synthetic polymer fibers, cotton fabrics treated with modern flame-retardant and reinforcement finishes often cannot meet rigid military specifications. Polypyrrole-magnesium oxide (ppy-MgO) and polypyrrole-magnesium oxide-carbon nanotube (ppy-MgO-CNT) composites were prepared with various weight ratios by chemical polymerization method. 1,2,3,4-Butane tetracarboxylic acid (BTCA) was used as a cross-linking agent in the presence of sodium hypophosphite (SHP). The composite sol was coated on cotton fabric using the pad-dry-cure technique. The coated cotton fabrics were characterized by SEM, EDAX, XRD, UV-DRS and FT-IR analysis, and tested for flame retardant and UPF application. The flame-retardant study showed a maximum char length of 0.3 cm and the char yield was about 49% for the ppy-MgO-CNT composite. For that UPF application, a 30 UPF value was shown for the ppy-MgO-CNT composite. In the case of the antibacterial study, the zone of inhibition was observed for all of the test samples against MRSA and PAO1 bacteria. The zone of inhibition showed as 4.0, 3.0 mm for the ppy-MgO-CNT composite. Hence, the ppy-MgO-CNT composite was found to be efficient.
棉花是纺织和服装生产最重要的原材料之一。棉纤维的主要缺点是其机械性能较差且易燃性高。与一些合成聚合物纤维相比，经过现代阻燃和增强整理的棉织物往往无法满足严格的军事规格。采用化学聚合法制备了不同重量比的聚吡咯 - 氧化镁（ppy - MgO）和聚吡咯 - 氧化镁 - 碳纳米管（ppy - MgO - CNT）复合材料。在次磷酸钠（SHP）存在的情况下，使用1,2,3,4 - 丁烷四羧酸（BTCA）作为交联剂。采用浸轧 - 烘干 - 焙烘工艺将复合溶胶涂覆在棉织物上。对涂覆后的棉织物进行了扫描电子显微镜（SEM）、能谱分析（EDAX）、X射线衍射（XRD）、紫外 - 可见漫反射光谱（UV - DRS）和傅里叶变换红外光谱（FT - IR）分析，并测试了其阻燃性能和紫外线防护系数（UPF）。阻燃研究表明，ppy - MgO - CNT复合材料的最大炭长为0.3厘米，炭产率约为49%。对于UPF应用，ppy - MgO - CNT复合材料的UPF值为30。在抗菌研究中，观察到所有测试样品对耐甲氧西林金黄色葡萄球菌（MRSA）和铜绿假单胞菌（PAO1）细菌均有抑菌圈。ppy - MgO - CNT复合材料的抑菌圈分别为4.0、3.0毫米。因此，发现ppy - MgO - CNT复合材料是有效的。
