通过微流体学复制蜘蛛丝的剪切介导自我组装
Jianming Chen1,2,3,4, Arata Tsuchida5, Ali D Malay1
1Biomacromolecules Research Team, RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama, 351-0198, Japan.
Nature communications
|January 15, 2024
概括
研究人员使用微流体装置开发了人造蜘蛛丝. 这种新的方法模仿了天然丝的形成,实现了可比性质,并提供了对纤维设计的见解.
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
- 聚合物科学 聚合物科学
背景情况:
- 人工蜘蛛丝开发面临复制本土丝特性方面的挑战.
- 重组蜘蛛为制造合成丝纤维提供了一个有前途的途径.
研究的目的:
- 开发一种微流体方法,用于连续生产人工蜘蛛丝纤维.
- 为了研究离子诱导相位分离,pH驱动纤维化和剪切应力在纤维形成中的作用.
- 阐明序列结构关系,特别是聚氨块对人工丝特性的影响.
主要方法:
- 使用微流体装置控制纤维线.
- 集成的离子诱导的液体-液体相隔离和pH驱动的纤维化.
- 研究了贝塔板形成的剪切依赖感应及其与剪切应力的相关性.
主要成果:
- 确定了纤维形成的约72Pa的切应力门.
- 证明β叶形成依赖于蜘蛛序列中的聚氨块.
- 实现了一种具有29.2%β-sheet含量的MaSp2纤维,与原生拖线丝相比 (需要111 Pa的剪切应力).
- 发现聚氨块对液体-液体相分离和层次结构的影响有限.
结论:
- 微流体策略成功地产生了与天然丝相似的属性的人造蜘蛛丝纤维.
- 剪切应力是诱导人工丝中β板结晶的关键因素.
- 了解序列结构关系是高性能人工纤维的合理设计的关键.
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