Improved tough and conductive polyacrylamide/sodium alginate dual-network hydrogel by ionic liquid for flexible capacitor and multifunctional sensor

IF 2.8 4区 化学 Q3 POLYMER SCIENCE
Xiang Liu, Yuxin Deng, Ping Wang, Hongyu Tang, Shuangqing Li, Zheng Xing
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引用次数: 0

Abstract

The utilization of hydrogels in the domain of flexible capacitors (FCs) and multifunctional sensors (MSs) has attained considerable prevalence. However, balancing the various properties of such versatile hydrogels remains a major challenge. In the present study, a novel xIL/PAM/SA dual-network hydrogel composed of polyacrylamide/sodium alginate (PAM/SA) and an ionic liquid (IL) 1-Butyl-3-methylimidazolium hydroxide ([BMIM][OH]) is proposed. The OH in the IL inhibits the protonation of -NH2 groups on the polymer chain and avoids the reduction of the number of hydrogen bonds in the system due to the formation of -NH3+, thus enhancing the strength of the network. The results showed that the series of tough hydrogels had high tensile strength (386.64 kPa), elongation at break (338.16%), and toughness (670.83 kJ/m3). Moreover, the rich functionality such as capacitive performance (198.5 mF/cm2), water retention performance (LR = 25.4%), temperature sensitivity (GF = 2.12), and strain sensitivity (GF = 4.56), make it have broad application potential. This work improves the traditional dual-network hydrogels by ionic liquids (ILs) and provides a feasible idea for the design of multi-functional tough conductive hydrogels.

用离子液体改进了韧性和导电性好的聚丙烯酰胺/海藻酸钠双网络水凝胶,用于柔性电容器和多功能传感器
水凝胶在柔性电容器(fc)和多功能传感器(ms)领域的应用已经相当普遍。然而,平衡这种多用途水凝胶的各种特性仍然是一个主要挑战。本文提出了一种由聚丙烯酰胺/海藻酸钠(PAM/SA)和离子液体(IL) 1-丁基-3-甲基咪唑氢氧化铵([BMIM][OH])组成的新型xIL/PAM/SA双网络水凝胶。IL中的OH−抑制了聚合物链上-NH2基团的质子化作用,避免了系统中由于-NH3+的形成而导致的氢键数量的减少,从而增强了网络的强度。结果表明,该系列韧性水凝胶具有较高的抗拉强度(386.64 kPa)、断裂伸长率(338.16%)和韧性(670.83 kJ/m3)。此外,其电容性能(198.5 mF/cm2)、保水性能(LR = 25.4%)、温度灵敏度(GF = 2.12)和应变灵敏度(GF = 4.56)等丰富的功能使其具有广阔的应用潜力。本研究利用离子液体对传统的双网络水凝胶进行了改进,为多功能强韧导电水凝胶的设计提供了一种可行的思路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Polymer Research
Journal of Polymer Research 化学-高分子科学
CiteScore
4.70
自引率
7.10%
发文量
472
审稿时长
3.6 months
期刊介绍: Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology, including: polymer synthesis; polymer reactions; polymerization kinetics; polymer physics; morphology; structure-property relationships; polymer analysis and characterization; physical and mechanical properties; electrical and optical properties; polymer processing and rheology; application of polymers; supramolecular science of polymers; polymer composites.
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