The Stereocomplex Crystallites Improve the Stability of Biodegradable Poly(L-lactic acid)/Poly(D-lactic acid)Melt-Blown Nonwovens  

作　　者：Jin-Shuo Yu Yue-Wei Huan Hong-Wei Pan Zhi-Gang Liu Yan Zhao Zhi-Yong Tan Jun-Jia Bian Hui-Li Yang Hui-Liang Zhang 

机构地区：[1]Key Laboratory of Polymer Ecomaterials,Chinese Academy of Sciences,Changchun Institute of Applied Chemistry,Changchun,130022,China [2]College of Material and Engineering,School of Chemical Engineering,Engineering Research Center of Synthetic Resin and Special Fiber,Ministry of Education,Changchun University of Technology,Changchun,130012,China [3]Shandong Fufeng Fermentation Co.,Ltd.,Shandong,276600,China [4]National Engineering Research Center of Corn Deep Processing,Jilin COFCO Biochemistry Co.,Ltd.,Changchun,130033,China

出　　处：《Chinese Journal of Polymer Science》2025年第2期368-379,共12页高分子科学(英文版)

基　　金：financially supported by the fund of the Science and Technology Development Plan Project of Jilin Province of China(No.20240304161SF);the Science and Technology Development Plan Project of Jilin Province of China(No.20220203019SF);the Science and Technology Bureau of Changchun City of China(Nos.23SH11,23SH08);the Chinese Science Academy(Changchun Branch)(No.2024SYHZ0038).

摘　　要：Poly(lactic acid)(PLA)is a biodegradable and eco-friendly polymer that is increasingly being incorporated into various applications in contemporary society.However,the limited stability of PLA-based products remains a significant challenge for their broader use in various applications.In this study,poly(L-lactic acid)(PLLA)/poly(D-lactic acid)(PDLA)melt-blown nonwovens were prepared by melt spinning.The structure,thermal properties,thermal stability,biodegradability and crystalline morphology of the melt-blown nonwovens were investigated.DSC and WAXD confirmed the formation of stereocomplex(SC)crystallites in the PLLA matrix.The storage modulus(G′),loss modulus(G″),and complex viscosity(∣η^(*)∣)of the PLLA/PDLA blend increased with an increase in SC crystallite content.The thermal degradation temperatures of PLLA/PDLA melt-blown nonwovens increased with the incorporation of SC crystallites,and the maximum rate of decomposition increased to 385.5℃,thus enhancing the thermal stability.Compared with neat PLLA melt-blown nonwovens,the hydrophobicity of PLLA/PDLA melt-blown nonwovens was improved,and WCA increased to 139.7°.The SC crystallites were more resistant to degradation by proteinase K compared to neat PLLA.However,the degradation rate of PLLA/PDLA melt-blown nonwovens remained at a high level.This work provides an effective strategy to obtain high-performance PLLA melt-blown nonwovens.

关 键 词：PLLA PDLA Melt-blown nonwovens Stereocomplex crystallites Thermal stability Enzymatic degradation 

分 类 号：O63[理学—高分子化学]