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Tunable Biodegradable Polylactide–Silk Fibroin Scaffolds Fabricated by a Solvent-Free Pressure-Controllable Foaming Technology
ACS Applied Bio Materials ( IF 4.7 ) Pub Date : 2020-11-24 , DOI: 10.1021/acsabm.0c01157 Fang Wang 1, 2 , Hao Liu 1, 2 , Yingying Li 1, 2 , Yajuan Li 2 , Qingyu Ma 3 , Jun Zhang 2 , Xiao Hu 4, 5, 6
ACS Applied Bio Materials ( IF 4.7 ) Pub Date : 2020-11-24 , DOI: 10.1021/acsabm.0c01157 Fang Wang 1, 2 , Hao Liu 1, 2 , Yingying Li 1, 2 , Yajuan Li 2 , Qingyu Ma 3 , Jun Zhang 2 , Xiao Hu 4, 5, 6
Affiliation
Polylactide (PLA) and silk fibroin (SF) are biocompatible green macromolecular materials with tunable structures and properties. In this study, microporous PLA/SF composites were fabricated under different pressures by a green solid solvent-free foaming technology. Scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), thermogravimetric (TG) analysis, and Fourier transform infrared (FTIR) spectroscopy were used to analyze the morphology, structure, and mechanical properties of the PLA/SF scaffolds. The crystalline, mobile amorphous phases and rigid amorphous phases in PLA/SF composites were calculated to further understand their structure–property relations. It was found that an increase in pore density and a decrease in pore size can be achieved by increasing the saturation pressure during the foaming process. In addition, changes in the microcellular structure provided PLA/SF scaffolds with better thermal stability, tunable biodegradation rates, and mechanical properties. FTIR and XRD analysis indicated strong hydrogen bonds were formed between PLA and SF molecules, which can be tuned by changing the foaming pressure. The composite scaffolds have good cell compatibility and are conducive to cell adhesion and growth, suggesting that PLA/SF microporous scaffolds could be used as three-dimensional (3-D) biomaterials with a wide range of applications.
中文翻译:
无溶剂压力可控发泡技术制备的可调可生物降解聚乳酸-丝素蛋白支架
聚乳酸 (PLA) 和丝素蛋白 (SF) 是具有可调节结构和性能的生物相容性绿色高分子材料。本研究采用绿色固体无溶剂发泡技术在不同压力下制备微孔 PLA/SF 复合材料。采用扫描电子显微镜(SEM)、动态力学分析(DMA)、差示扫描量热法(DSC)、X射线衍射(XRD)、热重(TG)分析和傅里叶变换红外(FTIR)光谱分析形貌, PLA/SF 支架的结构和力学性能。计算了 PLA/SF 复合材料中的结晶、流动非晶相和刚性非晶相,以进一步了解它们的结构-性能关系。研究发现,在发泡过程中增加饱和压力可以增加孔密度和减小孔径。此外,微孔结构的变化为 PLA/SF 支架提供了更好的热稳定性、可调节的生物降解率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。可调节的生物降解速率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。可调节的生物降解速率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。
更新日期:2020-12-21
中文翻译:
无溶剂压力可控发泡技术制备的可调可生物降解聚乳酸-丝素蛋白支架
聚乳酸 (PLA) 和丝素蛋白 (SF) 是具有可调节结构和性能的生物相容性绿色高分子材料。本研究采用绿色固体无溶剂发泡技术在不同压力下制备微孔 PLA/SF 复合材料。采用扫描电子显微镜(SEM)、动态力学分析(DMA)、差示扫描量热法(DSC)、X射线衍射(XRD)、热重(TG)分析和傅里叶变换红外(FTIR)光谱分析形貌, PLA/SF 支架的结构和力学性能。计算了 PLA/SF 复合材料中的结晶、流动非晶相和刚性非晶相,以进一步了解它们的结构-性能关系。研究发现,在发泡过程中增加饱和压力可以增加孔密度和减小孔径。此外,微孔结构的变化为 PLA/SF 支架提供了更好的热稳定性、可调节的生物降解率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。可调节的生物降解速率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。可调节的生物降解速率和机械性能。FTIR和XRD分析表明PLA和SF分子之间形成了强氢键,可以通过改变发泡压力来调节。复合支架具有良好的细胞相容性,有利于细胞粘附和生长,表明PLA/SF微孔支架可作为具有广泛应用的三维(3-D)生物材料。