Teixeira Marta A, Amorim M Teresa P, Felgueiras Helena P
Centre for Textile Science and Technology (2C2T), Department of Textile Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal.
Polymers (Basel). 2019 Dec 18;12(1):7. doi: 10.3390/polym12010007.
Tissue engineering (TE) holds an enormous potential to develop functional scaffolds resembling the structural organization of native tissues, to improve or replace biological functions and prevent organ transplantation. Amongst the many scaffolding techniques, electrospinning has gained widespread interest because of its outstanding features that enable the production of non-woven fibrous structures with a dimensional organization similar to the extracellular matrix. Various polymers can be electrospun in the form of three-dimensional scaffolds. However, very few are successfully processed using environmentally friendly solvents; poly(vinyl alcohol) (PVA) is one of those. PVA has been investigated for TE scaffolding production due to its excellent biocompatibility, biodegradability, chemo-thermal stability, mechanical performance and, most importantly, because of its ability to be dissolved in aqueous solutions. Here, a complete overview of the applications and recent advances in PVA-based electrospun nanofibrous scaffolds fabrication is provided. The most important achievements in bone, cartilage, skin, vascular, neural and corneal biomedicine, using PVA as a base substrate, are highlighted. Additionally, general concepts concerning the electrospinning technique, the stability of PVA when processed, and crosslinking alternatives to glutaraldehyde are as well reviewed.
组织工程(TE)在开发类似于天然组织结构组织的功能性支架、改善或替代生物功能以及防止器官移植方面具有巨大潜力。在众多支架技术中,静电纺丝因其突出特点而受到广泛关注,这些特点使其能够生产出具有类似于细胞外基质尺寸组织的非织造纤维结构。各种聚合物都可以以三维支架的形式进行静电纺丝。然而,使用环境友好型溶剂成功加工的聚合物非常少;聚乙烯醇(PVA)就是其中之一。由于其优异的生物相容性、生物降解性、化学热稳定性、机械性能,最重要的是其能够溶解于水溶液中,PVA已被研究用于组织工程支架的生产。在此,提供了基于PVA的静电纺丝纳米纤维支架制造的应用和最新进展的完整概述。重点介绍了以PVA为基础基质在骨、软骨、皮肤、血管、神经和角膜生物医学方面的最重要成果。此外,还综述了有关静电纺丝技术、加工时PVA的稳定性以及戊二醛交联替代方法的一般概念。