Multifunctional lyocell fibers prepared by in-situ incorporation of nano-SiO2 via dope addition

IF 5.4 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-10-04 DOI:10.1016/j.colsurfa.2025.138557

Wenli Gu, Mengtian Kou, Jinping Li, Yue Zhang, Yumei Zhang

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Abstract

This study presents a simple and effective strategy for fabricating multifunctional Lyocell fibers by dope addition of nano-SiO₂. Molecular simulations and experimental analyses indicated SiO₂ has little effect on the stability of N-methylmorpholine N-oxide (NMMO) solvent and Lyocell dope, supporting smooth spinning. Therefore, Lyocell-SiO₂ composite fibers containing up to 10 wt% nano-SiO₂ were prepared via dry-jet wet spinning. By the high-shear effect of nozzle, the Segre-Silberberg effect drives nano-SiO₂ migration toward the fiber surface, thereby enhancing its surface functionality. The results demonstrated that the introduction of 10 wt% nano-SiO₂ significantly enhanced multiple performance attributes of Lyocell fibers: flame retardancy was improved, with the limiting oxygen index (LOI) increasing from 19 % to 25 %; ultraviolet resistance and light-shielding properties was strengthened, as indicated by a ultraviolet protection factor value rising to 60; no fibrillation was observed after 30 min of ultrasound; and metal ion adsorption capacity was augmented. This work provides valuable insights into the development of functional Lyocell fibers using dope addition and nozzle high shear method and their multifunctional applications in textiles.

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原位掺入纳米二氧化硅制备多功能莱赛尔纤维

本研究提出了一种简单有效的利用掺杂纳米二氧化硅制备多功能莱赛尔纤维的方法。分子模拟和实验分析表明，SiO2对NMMO （N-methylmorpholine N-oxide， NMMO）溶剂和Lyocell涂料的稳定性影响不大，有利于纺丝的顺利进行。因此，采用干湿纺法制备了含有高达10 wt%纳米sio2的Lyocell-SiO2复合纤维。通过喷嘴的高剪切效应，spe - silberberg效应驱动纳米sio2向纤维表面迁移，从而增强其表面功能性。结果表明：10 wt%纳米sio2的加入显著提高了Lyocell纤维的多项性能：阻燃性能得到改善，极限氧指数（LOI）由19 %提高到25 %；抗紫外线和遮光性能增强，紫外线防护系数提高到60；超声30 min后未见纤颤；金属离子吸附能力增强。本研究为利用掺杂和喷嘴高剪切法开发功能性Lyocell纤维及其在纺织品中的多功能应用提供了有价值的见解。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.