Scholarlink

<p>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<sup>−</sup> in the IL inhibits the protonation of -NH<sub>2</sub> groups on the polymer chain and avoids the reduction of the number of hydrogen bonds in the system due to the formation of -NH<sup>3+</sup>, thus enhancing the strength of the network. The results showed that the series of tough hydrogels had high tensile strength (386.64&#xa0;kPa), elongation at break (338.16%), and toughness (670.83 kJ/m<sup>3</sup>). Moreover, the rich functionality such as capacitive performance (198.5 mF/cm<sup>2</sup>), 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.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

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

  • 期刊论文

  • 发表日期：

    2025年8月22日

查看全文
  • Xiang Liu,
  • Yuxin Deng,
  • Ping Wang,
  • Hongyu Tang,
  • Shuangqing Li,
  • Zheng Xing

摘要

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.