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Biomimetic Strain-Stiffening Hydrogel with Crimped Structure

机译：带卷曲结构的仿生菌株加强水凝胶

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摘要

Synthetic hydrogels are unique tissue mimics but rarely reproduce the strain-stiffening properties of native tissues. This mechanical mismatch impairs the performance of hydrogels in practical applications. Inspired by the crimped structure of collagenous tissues, a series of strain-stiffening hydrogels composed of curved parallel fibers are developed. These fibers are constructed from a bundle of intertwisted nanofibrils composed of short alkyl side chain-modified polymer chains. This hierarchical organization enables exquisitely cascaded deformation that facilitates soft-to-firm and resilience-to-viscoelasticity transitions, thus synergically mimicking the strain-adaptive stiffening and damping behaviors of natural tissues. Together with structural evolution and a constitutive model, rationally tuning the tortuosity and flexibility of the curved fibers produces a diverse combination of strain-stiffening properties and unprecedented penetration into the regions of several tissues. The crimped structure and the resultant stiffening properties constitute major improvements to nanofiber-based scaffolds for use in collagenous tissue repair.
机译：合成水凝胶是独特的组织模拟物，但很少再现天然组织的应变加强特性。这种机械不匹配在实际应用中损害了水凝胶的性能。由胶质组织的卷曲结构的启发，开发了由弯曲平行纤维组成的一系列应变加强水凝胶。这些纤维由由短烷基侧链改性的聚合物链组成的一束嵌段的纳米纤维构成。该层级组织能够实现精美的级联变形，以促进软型和可弹性 - 粘弹性过渡，从而协同造型地模拟天然组织的应变自适应加强和阻尼行为。与结构演变和构成模型一起，合理调整曲线纤维的曲折性和柔韧性产生了一种不同的应变加强性能和前所未有的渗透到几种组织的区域。卷曲结构和所得的加强性能构成对基于纳米纤维的支架用于胶原组织修复的主要改进。

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  • 来源
    《Advanced Functional Materials》 |2021年第43期|2104139.1-2104139.11|共11页
  • 作者

    Luo Jiye; Li Shengjie; Xu Jingyu; Chai Muyuan; Gao Liang; Yang Chunzhen; Shi Xuetao;

  • 作者单位

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Peoples R China;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Peoples R China;

    South China Univ Technol Natl Engn Res Ctr Tissue Restorat & Reconstruct Guangzhou 510640 Peoples R China|South China Univ Technol Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

    Guangdong Univ Technol Sch Chem Engn & Light Ind Guangzhou 510006 Peoples R China;

    Sun Yat Sen Univ Sch Mat Sci Guangzhou 510275 Peoples R China;

    South China Univ Technol Natl Engn Res Ctr Tissue Restorat & Reconstruct Guangzhou 510640 Peoples R China|South China Univ Technol Sch Mat Sci & Engn Guangzhou 510640 Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    hydrogels; strain-stiffening hydrogels; tough hydrogels;

    机译：水凝胶;菌株加强水凝胶;坚硬的水凝胶;

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