Department of Textile Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh; State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China.
State Key Laboratory of Fire Science, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, PR China.
Int J Biol Macromol. 2024 Jan;254(Pt 1):127610. doi: 10.1016/j.ijbiomac.2023.127610. Epub 2023 Oct 28.
In this work, microcrystalline cellulose (MCC) treated polyamide 66 (PA66) textiles were coated with green and naturally abundant polysaccharides specifically, chitosan (CS) and sodium alginate (SA) together with phytic acid (PA) via layer by layer (LbL) deposition. The prime focus of such treatment was to intensify both the hydrophilic and flame retardant properties of PA66 fabric substrates. Subsequently, the prepared coatings were further subjected to cross-linking modification by dipping them into the barium (Ba) salt solution. Obtained results indicated that the MCC-modified PA66 exhibited a water contact angle (WCA) value of 0 and revealed a drop in peak heat release rate (pHRR) up to 31 % with complete suppression of melt-dripping. Meanwhile, the Ba-ion-induced cross-linking treatment further escalated this reduction up to 36 % by adding enhanced thermal stability, improved char quality along better wash durability of as prepared coatings. In addition, the combined modification of PA66 textiles with MCC and Ba-ion handed a superb enhancement of physical properties like tensile strength by ca. 50 % compared to the pure PA66. Thus, this MCC-assisted surface modification paves the way for a new kind of greener treatment of PA66 textiles in attaining superior hydrophilic and flame retardant properties of the same.
在这项工作中，通过层层（LbL）沉积技术，用绿色且丰富的天然多糖（壳聚糖（CS）和海藻酸钠（SA））和植酸（PA）对经过微结晶纤维素（MCC）处理的聚酰胺 66（PA66）纺织品进行了涂层处理，以增强 PA66 织物基底的亲水性和阻燃性。随后，将制备的涂层进一步浸入钡（Ba）盐溶液中进行交联改性。结果表明，MCC 改性的 PA66 的水接触角（WCA）值为 0，显示出高达 31%的峰值热释放率（pHRR）下降，完全抑制了熔融滴落。同时，Ba 离子诱导的交联处理通过增加热稳定性、改善炭质质量以及提高所制备涂层的耐洗性，将这种降低进一步提高到 36%。此外，与纯 PA66 相比，MCC 和 Ba 离子共同改性的 PA66 纺织品的物理性能（如拉伸强度）提高了约 50%。因此，这种 MCC 辅助的表面改性为 PA66 纺织品的新型绿色处理铺平了道路，以获得相同的优异亲水性和阻燃性。
