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

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

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Biodegradable polylactic acid(PLA)melt-blown nonwovens are attractive candidates to replace non-degradable 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 MJ·m-3,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.

PLAPHBVMelt-blownBiodegradableStrengthToughness

Gaohui Liu、Jie Guan、Xianfeng Wang、Jianyong Yu、Bin Ding

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Shanghai Frontier Science Research Center of Advanced Textiles,College of Textiles,Donghua University,Shanghai 201620,China

College of Materials Science and Engineering,Qingdao University,Qingdao 266071,China

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaProgram of Shanghai Academic/Technology Research LeaderInternational Cooperation Fund of Science and Technology Commission of Shanghai Municipality

2022YFB38049032022YFB38049005227305221XD142010021130750100

2024

10.1016/j.eng.2023.02.021

工程(英文)

工程(英文)

CSTPCDEI
ISSN：2095-8099
年,卷(期)：2024.39(8)