Enhancing compatibility and biodegradability of polylactic acid/biomass composites through torrefaction of forest residue  

作　　者：June-Ho Choi Myeong Rok Ahn Chae-Hwi Yoon Yeon-Su Lim Jong Ryeol Kim Hyolin Seong Chan-Duck Jung Sang-Mook You Jonghwa Kim Younghoon Kim Hyun Gil Cha Jae-Won Lee Hoyong Kim 

机构地区：[1]Center for Bio-based Chemistry,Korea Research Institute of Chemical Technology(KRICT),Ulsan 44429,South Korea [2]Department of Wood Science and Engineering,College of Agriculture and Life Sciences,Chonnam National University,Gwangju 61186,South Korea [3]Interdisciplinary Program in IT-Bio Convergence System,Chonnam National University,Gwangju 61186,South Korea

出　　处：《Journal of Bioresources and Bioproducts》2025年第1期51-61,共11页生物质资源与工程(英文)

基　　金：supported by the Korea Research Institute of Chemical Technology(KRICT)Project(No.KS2442-10);the R&D Program(No.20017973)of the Ministry of Trade,Industry,and Energy(MOTIE/KEIT).

摘　　要：This study investigated the effects of torrefaction on forest residue(FR)and its subsequent ap-plication as a bulk-loading filler in polylactic acid(PLA)composites.Torrefaction enhanced the chemical properties of FR,improving its compatibility with PLA,and the crystallinity increased from 24.9%to 42.5%.The process also improved the hydrophobicity of PLA/biomass composites,as demonstrated by the water contact angle of 76.1°,closely matching that of neat PLA(76.4°).With the introduction of 20%modified biomass properties after torrefaction treatment,the tensile strength of PLA/biomass composite increased from 58.7 to 62.3 MPa.Additionally,the addition of torrefied forest residue(TFR)accelerated biodegradation by increasing the onset of degrada-tion and inhibiting crystallization.After 90 d,the biodegradability of PLA/biomass composites reached 94.9%,which had a 6.9%increase compared to the neat PLA(88.8%).Overall,this study highlights the potential of torrefaction in enhancing both the physical properties and biodegrad-ability of PLA-based composites,contributing to a more sustainable approach to reducing plastic pollution.

关 键 词：Forest residue TORREFACTION Bulk-loading filler Polylactic acid composite HYDROPHOBICITY Tensile strength BIODEGRADABILITY 

分 类 号：S21[农业科学—农业机械化工程]