摘要
作为一种潜在的生物材料,以丝素蛋白制备的膜材料越来越多地应用到生物医学领域。丝素蛋白膜的力学性能是一个重要的表征参数,对其后续的体外体内应用有较大的影响。本文先简述丝素蛋白的多级结构与力学性能的关系;然后总结制备工艺对丝素蛋白膜力学性能的影响,阐述不同的处理方式对丝素蛋白膜微观结构的影响及由此所致的力学性能的变化。丝素蛋白膜的制备工艺包括丝素蛋白溶液的制备(先脱胶再溶解丝素)、成膜工艺(按结构形式分为致密膜、多孔膜和多层膜),以及成膜后处理(有机溶剂浸泡、水蒸气退火和外力作用)等。此外,讨论复合丝素蛋白膜中不同改性方法导致的结构变化与力学性能的关系。最后,展望丝素蛋白膜材料的发展趋势,为不同需求下的丝素蛋白膜的发展提供借鉴和参考。
Silk fibroin shows biocompatibility,biodegradability,and a lack of immunogenicity and allergenicity,possessing great potential in biomedical applications.In various forms of silk fibroin biomaterials,silk fibroin films are attracting increasing attention due to their easy processing.Among the physic-chemical properties of silk fibroin films,mechanical properties have great impact on their subsequent applications in vitro and in vivo.First,this paper briefly discussed the relationship between the hierarchical structures and mechanical properties of silk fibroin.Then,it summarized the influence of preparation parameters on mechanical properties,and the influence of different treatments on microstructure of silk films and the resulting changes in mechanical properties.Moreover,it discussed the relationship between structural changes and mechanical properties of silk fibroin films.Finally,it looked to the future to provide reference for the development of silk fibroin films to meet a variety of needs.The mechanical properties of silk fibroin materials are structure dependent.Silk fibroin materials have five levels of hierarchical structures,in which the content ofβ-sheet in the secondary structure,the size and content ofβ-crystallites in the tertiary structure,and the density and orientation ofβ-crystallites in the quaternary structure are all critical parameters to the mechanical properties.The multi-level structure of silk fibroin can progressively influence the macroscopic mechanical properties step by step.In the aggregated state,it is generally accepted that the strength and stiffness of the silk fibroin material are determined by Silk II while ductility and flexibility are controlled by Silk I.The rational design and reconstruction of silk fibroin structure can be implemented by controlling the preparation process.Pure silk fibroin films can be prepared in three steps:solution fabrication,film formation and post-treatment.Solution fabrication consists of degumming and silk fibroin dissolution,which will redu
作者
刘海宇
梁文安
王叶元
胡豆豆
孙京臣
LIU Haiyu;LIANG Wen’an;WANG Yeyuan;HU Doudou;SUN Jingchen(College of Animal Science,South China Agricultural University,Guangzhou 510642,China)
出处
《丝绸》
CAS
CSCD
北大核心
2024年第4期50-61,共12页
Journal of Silk
基金
广州市基础研究计划基础与应用基础研究项目(SL2023A04J00039)。
关键词
丝素蛋白
薄膜
力学性能
调控方法
复合材料
“结构性能”关系
silk fibroin
film
mechanical properties
regulation method
composite materials
structure-property relationship
