文献类型：期刊文献

英文题名：Enhancing interfacial interaction and crystallization in polylactic acid-based biocomposites via synergistic effect of wood fiber and self-assembly nucleating agent

作者：Lv, Chao[1] Luo, Shupin[1] Guo, Wenjing[1] Chang, Liang[1]

第一作者：Lv, Chao

通信作者：Luo, SP[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, 2 Dongxiaofu, Beijing 100091, Peoples R China

年份：2023

卷号：253

外文期刊名：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

收录：;EI(收录号：20234114854359);Scopus(收录号：2-s2.0-85173278241);WOS:【SCI-EXPANDED(收录号:WOS:001088490600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (grant number 31901250) .

语种：英文

外文关键词：Poly (lactic acid); Self-assembly; Interface

摘要：Incorporation of natural fibers into polylactic acid (PLA) provides a feasible pathway to improve the performance of PLA with a low environmental impact. However, the insufficient interfacial adhesion between fiber and matrix limits the reinforcement efficiency of fiber and final mechanical properties of the biocomposites. Herein we reported an efficient method to simultaneously enhance interfacial interaction, crystallization and mechanical performance of PLA-based biocomposites via combination of wood fiber (WF) and a self-assembly nucleating agent (TMC-300). The interactions between WF and TMC-300 and its influence on PLA, including interfacial crystal morphology, crystallization behavior, and mechanical performance were studied. The results showed that TMC-300 could self-assemble into dendritic-like structure on WF surface driven by hydrogen bonding, inducing the epitaxial crystallization of PLA. This unique interfacial crystallization integrated PLA matrix with WF, resulting in better interfacial adhesion. Under the optimal TMC-300 content (0.5 wt%), the flexural strength and notched impact strength of PLA composites increased by 10 % and 69 % compared with neat PLA, respectively. Additionally, TMC-300 and WF synergistically functioned as effective nucleating agents, which significantly accelerated the crystallization rate and improved the crystallinity of PLA. This work provides a new insight into the enhancement of interfacial bonding in natural fiber/PLA biocomposites.