材料科学
凝胶渗透色谱法
静电纺丝
聚碳酸酯
傅里叶变换红外光谱
化学工程
组织工程
差示扫描量热法
扫描电子显微镜
聚合物
纳米技术
复合材料
生物医学工程
工程类
物理
热力学
医学
作者
Dmitri Visser,Hadi Bakhshi,Katharina Rogg,Ellena Fuhrmann,Franziska Wieland,Katja Schenke‐Layland,Wolfdietrich Meyer,Hanna Hartmann
出处
期刊:ACS omega
[American Chemical Society]
日期:2022-10-26
卷期号:7 (44): 39772-39781
被引量:10
标识
DOI:10.1021/acsomega.2c03731
摘要
Conventional synthesis routes for thermoplastic polyurethanes (TPUs) still require the use of isocyanates and tin-based catalysts, which pose considerable safety and environmental hazards. To reduce both the ecological footprint and human health dangers for nonwoven TPU scaffolds, it is key to establish a green synthesis route, which eliminates the use of these toxic compounds and results in biocompatible TPUs with facile processability. In this study, we developed high-molecular-weight nonisocyanate polyurethanes (NIPUs) through transurethanization of 1,6-hexanedicarbamate with polycarbonate diols (PCDLs). Various molecular weights of PCDL were employed to maximize the molecular weight of NIPUs and consequently facilitate their electrospinnability. The synthesized NIPUs were characterized by nuclear magnetic resonance, Fourier-transform infrared spectroscopy, gel permeation chromatography, and differential scanning calorimetry. The highest achieved molecular weight (Mw) was 58,600 g/mol. The NIPUs were consecutively electrospun into fibrous scaffolds with fiber diameters in the submicron range, as shown by scanning electron microscopy (SEM). To assess the suitability of electrospun NIPU mats as a possible biomimetic load-bearing pericardial substitute in cardiac tissue engineering, their cytotoxicity was investigated in vitro using primary human fibroblasts and a human epithelial cell line. The bare NIPU mats did not need further biofunctionalization to enhance cell adhesion, as it was not outperformed by collagen-functionalized NIPU mats and hence showed that the NIPU mats possess a great potential for use in biomimetic scaffolds.
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