Preparation of cellulose nanocrystals and their application in reinforcing viscose filaments
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ORIGINAL RESEARCH
Preparation of cellulose nanocrystals and their application in reinforcing viscose filaments Anrong Yao . Lin Tan . Ronghui Guo . Mi Zhou . Yong Zhang Puxin Zhu
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Received: 4 March 2020 / Accepted: 8 October 2020 Ó Springer Nature B.V. 2020
Abstract Rod-like cellulose nanocrystals (CNCs) were mechanically prepared from microcrystalline cellulose by colloid milling, and then the CNCs were used to reinforce rayon filament yarn by way of viscose blending and wet spinning. Compared with ordinary viscose filaments, the viscose filament yarn enhanced by CNCs had higher crystallinity, dry and wet tensile strengths, and better humidity release. When the addition amount of CNCs reached 1 wt%, the crystallinity of the viscose filament was obviously
improved, and as a result, the wet and dry tensile strengths increased by 14% and 24%, respectively, showing excellent mechanical properties. The research work in this paper has a certain reference significance to improve the mechanical performance of viscose filaments, and more importantly, the CNC preparation process used in the work is simple and environmentally friendly.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03521-y) contains supplementary material, which is available to authorized users. A. Yao L. Tan R. Guo M. Zhou Y. Zhang (&) P. Zhu (&) College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China e-mail: [email protected] P. Zhu e-mail: [email protected]
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Cellulose
Graphic abstract
Keywords Microcrystalline cellulose Cellulose nanocrystals Reinforcement Viscose filament Nanocomposite fiber Abbreviations MCC Microcrystalline cellulose CNCs Cellulose nanocrystals RPM Revolutions per minute SD Standard deviation COV Coefficient of variation
Introduction Viscose filament is one of the most important regenerated cellulose fibers with the highest yield due to its mature production technology, wide source of raw materials, good hygroscopicity, comfortable wearing and good spinnability (Wolf 1981; Chen 2015). In recent years, regenerated cellulose fibers have become increasingly popular among consumers. The viscose fabrics have super antistatic performance, as well as good air permeability and moisture control function, known as ‘‘breathing fabric’’. The garment made from viscose filament is soft, smooth, cool, breathable, antistatic and colorful. These unique properties make
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it widely used in underwear, textile supplies, clothing apparel and blanket ornaments and so on (Morton and Beaumont 1960). Due to the low crystallinity of ordinary viscose filaments, the dimensional stability is poor under wet condition and the mechanical property declines seriously. Therefore, how to obtain viscose filament with high strength and low elongation at break is a hotspot of long-term research. A kind of viscose fiber with high strength and high wet modulus was obtained by retarding the reduction in pol
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