PLA/SPI复合纤维的制备及性能研究

Preparation and Property of PLA/SPI Blend Fibers

以氯仿和乙醇为共溶剂,静电纺丝制备不同比例的聚乳酸(PLA)/大豆分离蛋白(SPI)复合纤维。PLA/SPI复合纤维的平均直径介于108～304nm,并随着体系中SPI含量的增大而变细;相同SPI含量下,随PLA分子量的增大,纤维直径变粗。FT-IR和XRD分析结果显示,SPI的引入破坏了PLA的晶体结构,且复合纤维中SPI与PLA通过氢键缔合。吸水率和失重率分析结果表明,PLA/SPI复合纤维较纯PLA纤维的亲水性和降解性能随SPI含量的增大而提高更快。

Poly（lactic acid）（PLA）/soy protein isolate（SPI） blend fibers with different compositions were prepared via electrospinning technique using chloroform and ethanol as mixed solvents.The average diameters of PLA/SPI blend fibers were ranged from 108nm to 304 nm.At increasing the SPI content,the diameters became thin,while the diameters became large with the increase of the molecular weight of PLA at the same ratio of SPI.FT-IR and XRD analysis results indicated that the addition of SPI destroyed the crystalline of PLA,and there existed hydrogen bonds between PLA and SPI.The hydrophility was tested via water uptake,and degradation was investigated by the change of weight loss.The results showed that the hydrophility and degradability were increased,compared with pure PLA fibers,the higher SPI content,the better hydrophility and degradability the PLA/SPI blend fibers.