高等学校化学学报 ›› 2026, Vol. 47 ›› Issue (1): 20250327.doi: 10.7503/cjcu20250327

• 研究论文 • 上一篇    下一篇

丝素蛋白水凝胶的剪切诱导成胶动力学与机制

陆加霖1,2, 庄雅灵1,3, 王雅楠1,3, 常非2(), 丁建勋1,3(), 陈学思1,3   

  1. 1.中国科学院长春应用化学研究所高分子科学与技术全国重点实验室, 长春 130022
    2.吉林大学第二医院足踝外科, 长春 130041
    3.中国科学技术大学应用化学与工程学院, 合肥 230026
  • 收稿日期:2025-11-01 出版日期:2026-01-10 发布日期:2025-12-10
  • 通讯作者: 常非,丁建勋 E-mail:changfei@jlu.edu.cn;jxding@ciac.ac.cn
  • 作者简介:第一联系人:共同第一作者.
  • 基金资助:
    国家重点研发计划项目(2022YFE0107700);国家自然科学基金(U21A2099);国家自然科学基金(82572761);吉林省科技发展计划项目(20240101002JJ)

Shear-induced Gelation Kinetics and Mechanisms of Silk Fibroin Hydrogels

LU Jialin1,2, ZHUANG Yaling1,3, WANG Yanan1,3, CHANG Fei2(), DING Jianxun1,3(), CHEN Xuesi1,3   

  1. 1.State Key Laboratory of Polymer Science and Technology,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China
    2.Department of Foot and Ankle Surgery,the Second Hospital of Jilin University,Changchun 130041,China
    3.School of Applied Chemistry and Engineering,University of Science and Technology of China,Hefei 230026,China
  • Received:2025-11-01 Online:2026-01-10 Published:2025-12-10
  • Contact: CHANG Fei, DING Jianxun E-mail:changfei@jlu.edu.cn;jxding@ciac.ac.cn
  • Supported by:
    the National Key R&D Program of China(2022YFE0107700);the National Natural Science Foundation of China(U21A2099);the Science and Technology Development Program of Jilin Province, China(20240101002JJ)

摘要:

通过剪切-加热法诱导丝素蛋白形成富含β-折叠结构的水凝胶, 系统考察了剪切时间、 孵育温度及 蛋白浓度对β-折叠结构组装动力学和凝胶力学性能的影响. 研究结果表明, 0.03 g/mL的丝素蛋白溶液在10000 r/min的转速下剪切10 min并于60 ℃下孵育, 可在30 min内完成凝胶化, 形成含63.51% β-折叠结构的物理交联网络, 其储能模量为25.70 kPa, 压缩强度为108.29 kPa. 进一步揭示了丝素蛋白分子链由无规卷曲向 β-折叠结构转变的自组装动力学特征及其力学性能演变规律. 本文研究结果为剪切诱导丝素蛋白水凝胶的制备工艺优化及其在组织工程中的应用提供了重要参考.

关键词: 丝素蛋白水凝胶, 剪切诱导, 二级结构转变, 成胶动力学, 生物医用材料

Abstract:

A shear-heating method was employed to induce the formation of silk fibroin hydrogels enrich in β-sheet structures. The effects of shear duration, incubation temperature, and protein concentration on the kinetics of β-sheet assembly and the mechanical properties of resulting hydrogels were systematically investigated. The results demonstrated that a 0.03 g/mLsilk fibroin solution subjected to shear at 10000 r/min for 10 min and followed by incubation at 60 ℃ completed gelation within 30 min, yielding a physically cross-linked network containing 63.51% β-sheet structures, with a storage modulus of 25.70 kPa and a compressive strength of 108.29 kPa. Furthermore, the self-assembly kinetics of molecular chain transition from random coils to β-sheet structures and the corresponding evolution of mechanical properties were elucidated. This work provides optimized processing strategies and experimental evidence for the preparation of shear-induced silk fibroin hydrogels and supports their potential applications in tissue engineering.

Key words: Silk fibroin hydrogel, Shear-inducing, Secondary structure transition, Gelation kinetics, Biomedical material

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