文献题目:Hot-Compacted Interwoven Webs of Biodegradable Polymers
作者:Julia Tumbic, Angel Romo-Uribe, Mark Boden, Patrick T. Mather
刊物名称:Polymer
Abstract
The need exists for processing methods that increase the mechanical performance of biodegradable polymers. Recognizing the gap in performance between articles processed using fiber spinning and injection molding, we sought here to develop processing methodology that bridged these two processes while allowing for compositional diversity via blending. Thus, dual electrospinning was utilized to prepare blended, interwoven webs of poly(lactic acid) and poly(ε-caprolactone) in various proportions. The webs were then uniaxially deformed at elevated temperature, promoting fiber orientation, and finally compacted in a mold at elevated temperature and pressure. We observed admirable levels of orientation and crystallinity for pure components and the blends. Importantly, we observed the highest high strength and elongation at-break for a blend samples, indicating that PCL incorporation via the process adopted toughens PLA while also increasing strength and stiffness.
上线时间:17 August 2016
评论:美国雪城大学Patrick Mather教授课题组联合Johnson & Johnson Vision Care, Inc.和波士顿科技公司,通过双组分纺丝的方法,得到了PLA/PCL复合纤维毡。具体方法是,在接收器两边,分别使用装有不同溶液的两个喷头,在正电压的条件下,同时向接收转棍喷丝。两种材料在接收转棍上混合形成复合纤维毡。
得到的复合纤维毡经过高温下的单向拉伸,和压缩,可以获得较高的取向度和结晶度。在PCL质量分数为25%的情况下,经过处理的纤维毡具有极高的拉伸强度和断裂伸长率。从而证明了在PCL的共同作用下PLA材料的强度和任性都得到了增强,为高强度生物可降解材料拓宽了选择。
作者简介:Patrick T. Mather教授,男,美国人,雪城大学生物医学与化学工程系教授。于1989年在宾夕法尼亚州立大学获得工程学学士学位。1年后,在该校获得机械工程硕士学位,研究课题为超声流变学。随后赴加州大学圣芭芭拉分校获得材料学博士学位,研究课题为液晶流体的剪切流行为。之后在美国空军实验室进行高分子加工方面的研究,至1999年。随后又分别效力于康涅狄格大学,凯斯西储大学至2007年。从2007年起,在雪城大学任教至今。其主要研究领域包括医用高分子的合成,加工及表征;纳米复合材料;新型功能化聚合物;液晶材料;质子交换膜;高性能热塑性材料等。
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