An extremely tough and ionic conductive natural-polymer-based double network hydrogel,Journal of Materials Chemistry B

当前位置： X-MOL 学术 › J. Mater. Chem. B › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

An extremely tough and ionic conductive natural-polymer-based double network hydrogel
Journal of Materials Chemistry B ( IF 6.1 ) Pub Date : 2021-08-12 , DOI: 10.1039/d1tb01458g
Xingyue Sun ₁ , Yongzhi Liang ₁ , Lina Ye ₂ , Haiyi Liang _{1,

3}

Affiliation

Hydrogels are widely used in fields such as drug delivery, tissue regeneration, soft robotics and flexible smart electronic devices, yet their application is often limited by unsatisfactory mechanical behaviors. Among the various improvement strategies, double network (DN) hydrogels from synthetic polymers demonstrated impressive mechanical properties, while those from natural polymers were usually inferior. Here, a novel DN hydrogel composed fully of natural polymers exhibiting remarkable mechanical properties and conductivity is prepared by simply soaking a virgin gellan gum/gelatin composite hydrogel in a mixed solution of Na₂SO₄ and (NH₄)₂SO₄. This hydrogel exhibits a tunable Young's modulus (0.08 to 42.6 MPa), good fracture stress (0.05 to 7.5 MPa), good fracture stretch (1.4 to 7.1), high fracture toughness (up to 27.7 kJ m⁻²), and high ionic conductivity (up to 11.4 S m⁻¹ at f = 1 kHz). The improvement in the mechanical properties of the DN gel is attributed to the chain-entanglement crosslinking points introduced by SO₄²⁻ in the gelatin network and the electrostatic interaction crosslinking points introduced by Na⁺ in the gellan gum network. The high ionic conductivity of the DN gel is attributed to the infiltration of the DN gel in a salt solution of high concentration. The developed gellan gum/gelatin DN hydrogel has shown a new pathway towards strengthening natural-polymer-based DN hydrogels and towards potential applications in biomedical engineering and flexible electronic devices.

中文翻译：

一种极其坚韧和离子导电的天然聚合物基双网络水凝胶

水凝胶广泛应用于药物输送、组织再生、软机器人和柔性智能电子设备等领域，但其应用往往受到机械性能不理想的限制。在各种改进策略中，来自合成聚合物的双网络 (DN) 水凝胶表现出令人印象深刻的机械性能，而来自天然聚合物的水凝胶通常较差。_{在这里，通过简单地将原始结冷胶/明胶复合水凝胶浸泡在 Na 2} SO ₄和 (NH ₄ ) ₂ SO ₄的混合溶液中，制备了一种完全由天然聚合物组成的新型 DN 水凝胶，具有显着的机械性能和导电性。. 这种水凝胶具有可调的杨氏模量（0.08 至 42.6 MPa）、良好的断裂应力（0.05 至 7.5 MPa）、良好的断裂拉伸（1.4 至 7.1）、高断裂韧性（高达 27.7 kJ m ^-2）和高离子电导率（在f = 1 kHz时高达 11.4 S m ^{-1 ）。}DN凝胶力学性能的提高归因于明胶网络中SO ₄^{2-引入的链缠结交联点和Na}⁺引入的静电相互作用交联点在结冷胶网络中。DN凝胶的高离子电导率归因于DN凝胶在高浓度盐溶液中的渗透。开发的结冷胶/明胶 DN 水凝胶为增强基于天然聚合物的 DN 水凝胶以及在生物医学工程和柔性电子设备中的潜在应用提供了一条新途径。

更新日期：2021-09-01

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11