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南京大学王炜、薛斌、曹毅教授团队 Adv. Mater. : 机械力诱导的适应性自增长蛋白水凝胶

  • 2026-05-08 19:14:56
南京大学王炜、薛斌、曹毅教授团队 Adv. Mater. : 机械力诱导的适应性自增长蛋白水凝胶
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传统高分子材料在外力作用下通常易发生损伤与断裂,而自然界中的生物体系(如肌肉、骨骼等)却能在持续力学刺激下通过主动调节实现结构强化,呈现出“越练越强”的自适应特性。如何让人工材料具备类似生物组织的力学适应性,即在机械载荷作用下实现自主增强与性能优化,已成为智能软材料研究的重要挑战。

近期,南京大学王炜、薛斌、曹毅团队成功设计出一种基于机械力诱导的适应性自增长蛋白水凝胶体系。该水凝胶能够在受力条件下实现自主生长,并通过在应力作用过程中增强其基本力学性能。其核心机制是利用储铜蛋白Csp1的力响应特性:在机械力作用下,Csp1发生可控解折叠,释放出Cu(I);释放的Cu(I)催化原位叠氮化物-炔烃环加成反应,从而在承受载荷时形成次级交联网络,增强材料力学性能。卸除外力后,Csp1可重新折叠并结合Cu(I),催化反应随之暂停,而材料自身仍保持再次生长的潜力(图1

该工作以Mechanically Induced Adaptive Self-Growing Protein Hydrogel”为题发表在《Advanced Materials》上。

1机械力诱导适应性自增长蛋白水凝胶的设计。

2通过蛋白质展开释放Cu(I)及重折叠恢复其功能的分子机制表征

3机械力诱导的Cu(I)Csp1交联水凝胶中的释放和重吸收

4机械力触发的水凝胶时空自增长。

5机械力触发Cu(I)催化叠氮-炔环加成反应(CuAAC)并驱动二次交联形成机理验证。

综上,该工作提出了一种由蛋白介导的闭环力-催化策略,构建出一类具备力学智能的新型材料。其核心在于利用金属蛋白在受力条件下的可逆展开与重折叠,实现对Cu(I)离子的按需释放与回笼,进而可控地驱动叠氮-炔基点击化学反应,诱导水凝胶网络发生二次交联。这种机械催化反馈回路使水凝胶在封闭系统中实现应力和时间依赖性的自我增强,无需外部单体供应。与传统应变硬化或不可控的自增长体系不同,该水凝胶能够在机械刺激下逐步增强,卸载后生长及时暂停,并在再次受力时重新启动,呈现出一种可编程的增强行为。水凝胶通过利用 Cu(I) 的稳态在循环生长 暂停 生长的转变中表现出可编程的机械记忆。

通过将力依赖的蛋白质构象动力学与催化活性相结合,该策略为设计在机械刺激下结构和功能不断演化的自适应生物材料建立了一个通用的机械化学框架。该机制将生物体系中的力信号转导与合成材料中的力化学反应有机结合,为单网络、可自主进化的水凝胶系统提供了新的设计思路。更重要的是,该体系无需外源单体补给,即可依据外界力学环境实现性能的自主优化,在自适应生物材料、软体机器人、可植入器件及力响应组织工程等领域展现出广阔的应用前景。

链接地址:

https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202523636

相关进展

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南京大学王炜/曹毅/蒋青/薛斌《Nat. Commun.》:用于干细胞辅助骨再生的具可编程时空力学信号水凝胶

南京大学曹毅/王炜/薛斌、北海道大学龚剑萍教授 Nat. Commun.:具有张拉整体结构的水凝胶

南京大学薛斌/曹毅/王炜团队 Nat. Commun.: 仿生自适应脂质层增强水凝胶传感器动态保水能力

南京大学王炜教授和曹毅教授团队NSR:水凝胶“人造皮肤”-可拉伸77倍、可自愈、可3D打印、灵敏度超高

南京大学王炜教授和曹毅教授研究团队在力化学的分子机制方面取得新进展

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山东大学陈浩副研究员、谭业邦教授与南京大学曹毅教授合作Angew:基于状态叠加交联位点精准调控聚合物网络粘弹性  

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  1. CONNECT:[ UseTime:0.000867s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001309s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000556s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000518s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001180s ]
  6. SELECT * FROM `set` [ RunTime:0.000445s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001287s ]
  8. SELECT * FROM `article` WHERE `id` = 552690 LIMIT 1 [ RunTime:0.000858s ]
  9. UPDATE `article` SET `lasttime` = 1778271632 WHERE `id` = 552690 [ RunTime:0.005823s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000634s ]
  11. SELECT * FROM `article` WHERE `id` < 552690 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001097s ]
  12. SELECT * FROM `article` WHERE `id` > 552690 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000966s ]
  13. SELECT * FROM `article` WHERE `id` < 552690 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002256s ]
  14. SELECT * FROM `article` WHERE `id` < 552690 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.007388s ]
  15. SELECT * FROM `article` WHERE `id` < 552690 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002644s ]
0.122622s