Strengthening poly(2-hydroxyethyl methacrylate) hydrogels using biochars and hydrophobic aggregations

IF 4.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Smart and Nano Materials Pub Date : 2022-08-02 DOI:10.1080/19475411.2022.2107115

Ping Zhang, Ziyi Xu, Zhiying Wu, Ping Xu, Canhui Yang

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引用次数: 1

Abstract

ABSTRACT As the first version of synthetic hydrogel, poly(2-hydroxyethyl methacrylate) hydrogels have found broad applications. However, their poor mechanical performances have been long-standing hurdles for practical deployments. Herein, we report on strengthening the poly(2-hydroxyethyl methacrylate) hydrogels with biochar nanoparticles and hydrophobic aggregations, which are induced by solvent exchange and reinforced by freeze-thaw. Both the vast anchoring points on the multifunctional surfaces of the biochar nanoparticles and the aggregates formed between poly(2-hydroxyethyl methacrylate) chains engender strong and dissipative physical crosslinks. The resulting hydrogels exhibit marked mechanical properties, encompassing high stretchability ~7, high fracture toughness ~1360 J m−2, high elastic modulus ~180 kPa, low friction coefficient ~0.2, self-recovery, and non-swellability. Furthermore, we demonstrate the versatility of the proposed strategy by using water/ionic liquid binary solvent as the solvent system, Laponite as the nano-reinforcement, and dry-anneal as the hydrophobic aggregation enhancer to synthesize mechanically robust hydrogels. Poly(2-hydroxyethyl methacrylate) hydrogels of superior mechanical properties are expected to enable previously inaccessible applications in biomedicine and engineering. GRAPHICAL ABSTRACT

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利用生物炭和疏水聚集强化聚甲基丙烯酸- 2-羟乙基水凝胶

摘要聚甲基丙烯酸2-羟基乙酯水凝胶作为第一种合成水凝胶，具有广泛的应用前景。然而，它们糟糕的机械性能一直是实际部署的障碍。在此，我们报道了用生物炭纳米颗粒和疏水性聚集体增强聚（甲基丙烯酸2-羟基乙酯）水凝胶，它们通过溶剂交换诱导并通过冻融增强。生物炭纳米颗粒多功能表面上的巨大锚定点和聚（甲基丙烯酸2-羟基乙酯）链之间形成的聚集体都会产生强烈的耗散性物理交联。所得水凝胶表现出显著的力学性能，包括高拉伸性~7、高断裂韧性~1360 J m−2、高弹性模量~180 kPa、低摩擦系数~0.2、自恢复性和不溶胀性。此外，我们通过使用水/离子液体二元溶剂作为溶剂体系，Laponite作为纳米增强剂，干退火作为疏水聚集促进剂来合成机械坚固的水凝胶，证明了所提出的策略的多功能性。具有优异机械性能的聚（甲基丙烯酸2-羟基乙酯）水凝胶有望在生物医学和工程中实现以前无法实现的应用。图形摘要

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来源期刊

International Journal of Smart and Nano Materials MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

6.30

自引率

5.10%

发文量

审稿时长

11 weeks

期刊介绍： The central aim of International Journal of Smart and Nano Materials is to publish original results, critical reviews, technical discussion, and book reviews related to this compelling research field: smart and nano materials, and their applications. The papers published in this journal will provide cutting edge information and instructive research guidance, encouraging more scientists to make their contribution to this dynamic research field.