羧基化纳米纤维素增强的柔性透明导电弹性体

doi:10.13475/j.fzxb.20240505201

纺织学报 ›› 2025, Vol. 46 ›› Issue (04): 11-19.doi: 10.13475/j.fzxb.20240505201

羧基化纳米纤维素增强的柔性透明导电弹性体

李亿鸿¹, 蔡君怡¹, 诸葛晓洁¹, 吴东芮¹, 滕德英¹, 俞建勇², 丁彬², 李召岭¹^,²()

1.东华大学纺织学院, 上海 201620
2.东华大学纺织科技创新中心, 上海 200051

收稿日期:2024-05-23 修回日期:2024-09-06 出版日期:2025-04-15 发布日期:2025-06-11
通讯作者: 李召岭(1985—),男,教授,博士。研究方向为智能纤维和生物质纤维的制备及其在功能织物及绿色复合材料等的应用。E-mail:zli@dhu.edu.cn。
作者简介:李亿鸿(2002—),男,本科生。主要研究方向为生物质纤维的制备及在可穿戴领域的应用。
基金资助:
国家自然科学基金项目(52073051);国家自然科学基金项目(52373054);中央高校基本科研业务费专项资金资助项目(2232024G-06-01);中央高校基本科研业务费专项资金资助项目(CUSF-DH-T-2023008)

Carboxylated nanocellulose-reinforced flexible transparent conductive elastomer

LI Yihong¹, CAI Junyi¹, ZHUGE Xiaojie¹, WU Dongrui¹, TENG Deying¹, YU Jianyong², DING Bin², LI Zhaoling¹^,²()

1. College of Textiles, Donghua University, Shanghai 201620, China
2. Innovation Center for Textile Science and Technology, Donghua University, Shanghai 200051, China

Received:2024-05-23 Revised:2024-09-06 Published:2025-04-15 Online:2025-06-11

摘要/Abstract

摘要：

针对现有离子导电弹性体(ICE)存在的离子泄露或潮解的问题,受到珍珠母微米尺度的“砖-泥”结构的启发,设计了一种新型的无液体本征离子导电弹性体,通过三元可聚合低共熔溶剂(T-PDES)和羧基化纳米纤维素纤维(CCNC)的原位聚合,CCNC表面电离的离子增加了离子迁移数量(电导率5.94 mS/m)。实验结果表明三维纤维素纤维网络和T-PDES之间的界面相互作用赋予ICE良好的力学性能,最大应力为0.06 MPa,最大应变为130%,且ICE具有良好的光学透明性,透光率约为80%。本研究为纤维素基可持续功能性离子导体的制备提供了一种有效的策略。

关键词: 本征离子导电弹性体, 三元可聚合低共熔溶剂, 羧基化纳米纤维素, 柔性, 光学透明

Abstract:

Objective Ionic conductive elastomers have excellent stretchability and ion transport properties, which show great application prospects in flexible transparent electronic devices, medical monitoring, soft robots and other fields. However, ionic conductive elastomers suffer from the dehydration or deliquescence issues impeding their further development in extreme environment. Inspired by the “brick-and-mortar” structure derived from nacre, this research targets on the innovative design of a new type of liquid-free intrinsically ionic conductive elastomer to overcome the dehydration or deliquescence issues caused by the sensitivity of traditional ionic conductive elastomers to humidity. This breakthrough development was aimed to expand the range of materials available for applications such as wearable sensors, foldable displays, wearable optics, and more.

Method A binary polymerizable deep eutectic solvent was prepared with choline chloride and acrylic acid as raw materials in different proportions, and a ternary polymerizable deep eutectic solvent was prepared with choline chloride, acrylic acid and oxalic acid as raw materials in different proportions. The ternary polymerizable deep eutectic solvent has the fiunction of uniformly dispersing different carboxylated nanocellulose(CCNC) fibers. The three were polymerized by in situ polymerization method under 365 nm ultraviolet irradiation, obtaining D-ICE, T-ICE and T-C-ICE. The structure and properties of each material were characterized.

Results In this research, samples with different ratios of raw materials were prepared. A variety of samples with different raw material proportions were prepared, and the microstructure, electrical and mechanical properties of the related materials were measured. When the proportion of acrylic acid was too little, it was found difficult to form a stable and transparent polymerizable eutectic solvent, highlighting the necessity of introducing a new hydrogen bond donor to maintain a stable polymerizable eutectic solvent. In addition, the introduction of carboxylate nanocellulose changed the proportion of chemical bonds in the raw material. The introduction of nanocellulose also reduces the transmittance of ultraviolet light because nanocellulose itself is a solid that is opaque to light. Under these conditions, the conductivity of the material reached 5.94 mS/m. The introduction of carboxylated nanocellulose significantly improved the ionic conductivity, while the acrylic acid content decreased which has little hindrance to ionic migration after polymerization. Under these conditions, the maximum stress of the material was 0.06 MPa and the maximum strain was 130%. Carboxylated nanocellulose, with a high aspect ratio, improved the mechanical properties of the ICE. ICE became electricity conductive and a LED light was lit during the stretching process, and was recoverable to the initial state after bending and twisting, with good fatigue resistance. The results proved that the material is functional ionic conductor which is sustainable, and also indicated broad application prospects in flexible transparent electronic products and other fields.

Conclusion The flexible transparent conductive elastomers reinforced by carboxylated nanocellulose were quickly prepared by in-situ polymerization. CCNC is directly derived from natural plants, and the components of PDES are low-cost and easy to obtain, so the manufacturing process of ICE is simple, green and environmentally friendly, without harsh reaction conditions and low cost. CCNC-based ionic conductors have microscopically and macroscopically enhanced multi-stage structures, which not only provide an effective strategy for the preparation of both sustainable and functional ionic conductors, but also show broad application prospects in flexible transparent electronic products and other fields.

Key words: intrinsically ionic conductive elastomer, ternary polymerizable deep eutectic solvent, carboxylated nanocellulose, flexibility, optical transparency

中图分类号:

TS193

李亿鸿, 蔡君怡, 诸葛晓洁, 吴东芮, 滕德英, 俞建勇, 丁彬, 李召岭. 羧基化纳米纤维素增强的柔性透明导电弹性体[J]. 纺织学报, 2025, 46(04): 11-19.

LI Yihong, CAI Junyi, ZHUGE Xiaojie, WU Dongrui, TENG Deying, YU Jianyong, DING Bin, LI Zhaoling. Carboxylated nanocellulose-reinforced flexible transparent conductive elastomer[J]. Journal of Textile Research, 2025, 46(04): 11-19.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20240505201

http://www.fzxb.org.cn/CN/Y2025/V46/I04/11

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样品编号	AA的量/ mol	OA的量/ mol	CCNC的质量分数/%
D-ICE/2	2	0	0
D-ICE/1.6	1.6	0	0
D-ICE/1.5	1.5	0	0
T-ICE/2	2	1	0
T-ICE/1.5	1.5	1	0
T-ICE/1	1	1	0
T-ICE/0.5	0.5	1	0
T-C-ICE-2%	0.5	1	2
T-C-ICE-5%	0.5	1	5
T-C-ICE-10%	0.5	1	10
T-C-ICE-15%	0.5	1	15
T-C-ICE-20%	0.5	1	20

羧基化纳米纤维素增强的柔性透明导电弹性体

Carboxylated nanocellulose-reinforced flexible transparent conductive elastomer

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