导电共价交联聚氨酯纤维的连续化制备及应用-中国材料进展

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Title:: Preparation and Applications of Conductive Covalent Cross-Linked Polyurethane Fibers

文章编号:: 1674-3962(2026)03-0239-06

作者:: 齐巧玉; 罗彬; 陈海良; 刘广臣; 李英乾; 管永; 游正伟; 1. 先进纤维材料全国重点实验室东华大学材料科学与工程学院，上海 201620 2. 山东一诺威聚氨酯股份有限公司，山东淄博 255000

Author(s):: QI Qiaoyu; LUO Bin; CHEN Hailiang; LIU Guangchen; LI Yingqian; GUAN Yong; YOU Zhengwei; 1. State Key Laboratory of Advanced Fiber Materials, College of Materials Science and Engineering,Donghua University, Shanghai 201620, China 2. Shandong Inov Polyurethane Co., Ltd., Zibo 255000, China

关键词:: 交联纤维; 连续化制备; 湿法纺丝; 应变传感; 聚氨酯

Keywords:: cross-linked fibers; continuous manufacturing; wet spinning; strain sensing; polyurethane

分类号:: TB34

DOI:: 10.7502/j.issn.1674-3962.202504008

文献标志码:: A

摘要:: 导电纤维凭借其一维结构优势（轻质和可编织等特性），在柔性电子与智能纺织领域展现出巨大潜力。三维的化学交联网络结构可显著提升纤维的力学性能与稳定性。然而，由于热固性聚合物通常不溶且不熔，限制了其加工性能，因此现有共价交联纤维制备技术存在步骤繁琐或需要外场能量辅助等问题。提出一种共价交联导电纤维的制备策略：利用聚肟氨酯固化前的预聚物溶液与导电填料混合作为纺丝液，以水为凝固浴，以湿法纺丝的方式通过预聚物与水的原位反应直接制备出交联的可拉伸导电纤维。该策略在无外场能量辅助的条件下可以直接连续制备交联纤维，所制备的纤维在50%的拉伸伸长率范围内存在稳定的电阻应变响应。该工作为交联导电纤维的连续制备提供了新方法。

Abstract:: Conductive fibers, with advantages such as lightweight and weavability， have shown great potential in flexible electronics and smart textiles. Threedimensional cross-linked network structures can substantially enhance polymer fibers-mechanical properties and stability. However, due to the insoluble and non-melting nature of thermosetting polymers, which limits their processability, existing covalent cross-linking techniques for fiber preparation often suffer from complicated procedures or the need for external energy input. This study presents an strategy for continuously producing conductive fibers. A polyoxime-urethane prepolymer solution with controlled fluidity is mixed with conductive fillers to form the spinning dope. This dope is then processed into conductive cross-linked polyoximeurethane fibers (eCPUF) via wet spinning. The continuous fiber formation is attributed to the rapid reaction between water and the polyurethane groups in the spinning solution during wet spinning. This reaction triggers the immediate formation of a layer at the fiber-solvent interface, effectively stabilizing the nascent fiber morphology. Consequently, this method enables direct fiber formation without external energy fields or extra cross-linking agents, reducing chemical waste and energy consumption. By incorporating carbon nanotube composites, the conductive functionality of the fibers is achieved, expanding their applications. The experimental results show that eCPUF exhibits stable resistance-strain responses within 50% tensile strain. This work offers a new method for the continuous manufacturing of crosslinked fibers.

中国材料进展[ISSN:1674-3962/CN:61-1473/TG]

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