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具有预应力延伸性结构的水凝

Bin Xue^1,2, Xu Han³, Haoqi Zhu³

¹Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, China. xuebinnju@nju.edu.cn.

Nature communications

|April 16, 2025

概括

研究人员通过使用酶诱导的晶体生长来设计生物模拟的延伸性水凝. 这些坚固,适应性强的材料模仿自然结构,为组织工程应用提供高刚性和性.

科学领域:

材料科学材料科学材料科学
生物材料工程生物材料工程
生物物理学的生物物理.

背景情况:

十分位结构,包括孤立的压缩元件和连续拉伸网络,是生物系统的基础,如细胞外矩阵和细胞骨.
这些自然结构为动态的生物功能提供了必要的非互惠的机械特性.

研究的目的:

开发一种由生物机械化学原理启发的合成方法,用于设计具有延伸度架构的水凝.
为了创建强大的和适应性的仿生材料,用于先进的应用.

主要方法:

在预先形成的聚合物网络中利用在位酶诱导的氨基酸晶体生长.
在预应力聚合物矩阵中实现了微晶"棒"的层次集成,模仿了自然的张分度.

主要成果:

工程水凝具有高刚度 (拉力模块高达30MPa) 和破裂性 (2600J m-2) 的张密度架构.
这些材料保持高含水量 (>80%) 并显示双模块行为,拉力压缩模块比为13.
设计成功地平衡了机械力,反映了自然的延伸性结构.

结论:

生物模拟性延伸性水凝表明了创造先进材料的有希望的策略.
这些材料具有适用于组织工程和其他需要强大,适应性机械行为的领域的适用性.

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