Large-Scale Preparation of Mechanically High-Performance and Biodegradable PLA/PHBV Melt-Blown Nonwovens with Nanofibers  

具备高机械性能、可生物降解的聚乳酸/聚(3-羟基丁酸酯-co-3-羟基戊酸酯)纳米熔喷无纺布的大规模制备

作　　者：Gaohui Liu Jie Guan Xianfeng Wang Jianyong Yu Bin Ding 

机构地区：[1]Shanghai Frontier Science Research Center of Advanced Textiles,College of Textiles,Donghua University,Shanghai 201620,China [2]College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China

出　　处：《Engineering》2024年第8期244-252,共9页工程（英文）

基　　金：supported by the National Key Research and Development Program of China(2022YFB3804903 and 2022YFB3804900);the National Natural Science Foundation of China(52273052);the Program of Shanghai Academic/Technology Research Leader(21XD1420100);the International Cooperation Fund of Science and Technology Commission of Shanghai Municipality(21130750100).

摘　　要：Biodegradable polylactic acid(PLA)melt-blown nonwovens are attractive candidates to replace nondegradable polypropylene melt-blown nonwovens.However,it is still an extremely challenging task to prepare PLA melt-blown nonwovens with sufficient mechanical properties for practical application.Herein,we report a simple strategy for the large-scale preparation of biodegradable PLA/poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)melt-blown nonwovens with high strength and excellent toughness.In this process,a small amount of PHBV is added to PLA to improve the latter’s crystallization rate and crystallinity.In addition,when the PHBV content increases from 0 to 7.5 wt%,the diameters of the PLA/PHBV melt-blown fibers decrease significantly(with the proportion of nanofibers increasing from 7.7%to 42.9%).The resultant PLA/PHBV(5 wt%PHBV)melt-blown nonwovens exhibit the highest mechanical properties.The tensile stress,elongation,and toughness of PLA/PHBV(5 wt%PHBV)melt-blown nonwovens reach 2.5 MPa,45%,and 1.0 MJm3,respectively.More importantly,PLA/PHBV melt-blown nonwovens can be completely degraded into carbon dioxide and water after four months in the soil,making them environmentally friendly.A general tensile-failure model of melt-blown nonwovens is proposed in this study,which may shed light on mechanical performance enhancement for nonwovens.

关 键 词：PLA PHBV MELT-BLOWN BIODEGRADABLE Strength TOUGHNESS 

分 类 号：TS176[轻工技术与工程—纺织材料与纺织品设计]