Promising Biomedical Material Based on Collagen Composite ElectrospunNanofibers: a Review
HUANG Yanping1,2, DAN Nianhua1,2, DAN Weihua1,2
1 National Engineering Laboratory for Clean Technology of Leather Manufacture, College of Light Industry, Textile and Food Engineering, Sichuan University, Chengdu 610065; 2 The Research Center of Biomedicine Engineering of Sichuan University, Chengdu 610065
Abstract: Collagen with triple helix structure is considered to be a major component of the extracellular matrix, which is widely used in the field of biomedical materials due to its unique characteristics, including low immunogenicity and biodegradability. However, there are intramolecular, intermolecular hydrogen bonds, ionic bonds, van der Waals forces, and hydrophobic bonds between polar groups and non-polar groups inside the collagen, hence it can only be dissolved in limited range of solvents, such as dilute acetic acid, hexafluoroisopropanol and trifluoroethanol, ionic liquid, making it difficult to fabricate collagen nanofibers. Fluoroalcohol is the most commonly used solvent for collagen electrospinning, but it is also prone to destroy the triple helix structure of collagen to some extent. In addition, the lack of intermolecular and intramolecular crosslinking results in the unsatisfactory properties of collagen electrospun nanofibers, e.g. low mechanical strength and high degradation tendency. In order to improve the performance of collagen nanofibers, researchers have invested considerable efforts in the co-electrospinning of collagen and organic polymer composites. The cooperation of the two materials significantly improves the strength of collagen nanofibers, meanwhile, endows them with other properties of organic polymers (elasticity, antibacterial, degradation resistance, etc.), which further extend their application in the biomedical field. Natural polymers derived from animals and plants have good biocompatibility, and their natural biological structure is distinctive to synthetic polymers. Nevertheless, natural polymers are mostly polyelectrolytes, making it more difficult to synthesize compared to the synthetic polymers. The composite nanomedical fibers prepared by combining collagen with natural polymers can not only retain the biocompatibility of natural polymers, but also get improved in the mechanical properties of collagen electrospun membranes or obtain other functionalities. In this regard, the blending of collagen with silk fibroin, chitosan, elastin and hyaluronic acid has received major attention. Synthetic polymer has fine physical properties, certain biocompatibility, good processability, and excellent repeatability, thus it can be blended with collagen to improve the spinnability of collagen and the mechanical properties of fiber membranes. The obtained composite membranes were found to exhibit promising potential in the field of tissue engineering scaffolds and drug sustained release requiring long-term implantation. Commonly used synthetic polymers blended with collagen are polycaprolactone, polyethylene oxide, polyurethane, polylactic acid-glycolic acid copolymer, poly(L-lactic acid-co-ε-caprolactone), polyvinyl alcohol. This review summarizes the global research status of collagen composite nanofibers fabricated by electrospinning method in recent years, focusing on the collagen/natural organic polymer composite nanofibers and the collagen/synthetic organic polymer composite nanofibers. It also provides an outlook over the future prospect.
作者简介: 黄艳萍,2016年毕业于四川大学,获得硕士学位。现为四川大学轻纺与食品学院博士研究生,在但卫华教授的指导下进行研究。目前主要研究领域为生物质医用材料。但卫华,四川大学博士,教授,博士研究生导师。享受国务院政府特殊津贴专家、四川省学术技术带头人。现任四川大学生物质与皮革工程系教授、四川大学生物质工程研究所所长、四川大学生物医学工程技术研究中心生物质医用材料研究室主任。《生物医学工程与临床》杂志编委、Journal of Applied Science、Biomaterials、《功能材料》审稿专家。danweihua_scu@126.com
引用本文:
黄艳萍, 但年华, 但卫华. 静电纺丝制备胶原基复合纳米医用纤维的研究进展[J]. 材料导报, 2019, 33(19): 3322-3327.
HUANG Yanping, DAN Nianhua, DAN Weihua. Promising Biomedical Material Based on Collagen Composite ElectrospunNanofibers: a Review. Materials Reports, 2019, 33(19): 3322-3327.
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