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首页> 外文期刊>Journal of Applied Polymer Science >Morphology, mechanical, and physical properties of wet-spun cellulose acetate fiber in different solvent-coagulant systems and in-situ crosslinked environment
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Morphology, mechanical, and physical properties of wet-spun cellulose acetate fiber in different solvent-coagulant systems and in-situ crosslinked environment

机译：不同溶剂 - 凝结体系中湿纤维纤维素纤维的形态，机械和物理性质及其原位交联环境

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摘要

Wet spinning is a popular fiber manufacturing process where the effects of solvent and coagulant on the wet-spun fiber are significant. In this study, we have explored the effect of solvent-coagulant interaction and in-situ crosslinking on the wet-spun cellulose acetate (CA) fiber. Investigation on 12 different solvent-coagulant systems revealed that variation in the systems resulted in significant variance in morphology and mechanical property of the fiber. Remarkable increase in mechanical property was observed after in-situ crosslinking with citric acid and polyethylene glycol (PEG). Inclusion of sodium hypophosphite (NaH2PO2) as catalyst further increased tensile modulus (similar to 407%) and crystallinity index (similar to 46%) compared to CA fiber crosslinked with only citric acid. It was established that fiber from CA-DMSO solution crosslinked with 10% citric acid and 10% PEG extruded in ethanol showed the highest tensile modulus (similar to 30 MPa). This in-depth study found an appropriate combination of solvent-coagulant for forming stable CA fiber, with the addition of crosslinkers and catalyst further increasing the strength and usability of the fiber.
机译：湿法纺丝是一种流行的纤维制造工艺，溶剂和凝固剂对湿法纺丝纤维的影响非常显著。在本研究中，我们探索了溶剂-凝聚剂相互作用和原位交联对湿纺醋酸纤维素（CA）纤维的影响。对12种不同的溶剂-混凝剂体系的研究表明，体系的变化导致纤维的形态和力学性能发生显著变化。用柠檬酸和聚乙二醇（PEG）原位交联后，力学性能显著提高。与仅用柠檬酸交联的钙纤维相比，加入次磷酸钠（NaH2PO2）作为催化剂进一步提高了拉伸模量（类似于407%）和结晶指数（类似于46%）。研究表明，用10%柠檬酸和10%聚乙二醇交联的CA-DMSO溶液在乙醇中挤出的纤维具有最高的拉伸模量（类似于30MPa）。这项深入的研究发现，合适的溶剂混凝剂组合可形成稳定的CA纤维，加入交联剂和催化剂可进一步提高纤维的强度和可用性。

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