@Article{jrm.2020.09961,
AUTHOR = {Ningning Wang, Caili Zhang, Wenqin Zhu, Yunxuan Weng},
TITLE = {Improving Interfacial Adhesion of PLA/Lignin Composites by One-Step Solvent-Free Modification Method},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {8},
YEAR = {2020},
NUMBER = {9},
PAGES = {1139--1149},
URL = {http://www.techscience.com/jrm/v8n9/39623},
ISSN = {2164-6341},
ABSTRACT = {To clarify the effects of lignin as a biodegradable filler added into the
PLA matrix, PLA/lignin composites with or without silane coupling agent of γ-
(2,3-epoxypropoxy)propy trimethoxysilane (KH560) were prepared by a one-step
solvent-free modification method. The effects of KH560 as a compatibilizer on
the morphology, chemical structure, crystallization behavior, thermal degradative
behavior as well as mechanical strength of the PLA/lignin composites were analyzed in detail. It was found that, after modification by KH560, the fractured surfaces of composites became smooth, suggested sufficient bonding between the
lignin and PLA in the composites with KH560 coupling agent molecules. This
result further proved by 1H NMR and ATR spectra of the composites that lignin
and PLA formed stable chemical bonds with KH560. Due to the toughening effect
of KH560, mainly affect the molecular chain mobility, the thermodynamic properties of LG-KH560/PLA composites were all reduced. When compared to the conventional solution modification method of adding silane coupling agents into
PLA/lignin, the composites were synthesized via a single-step reactive extrusion
modification procedure in this work showed relatively low tensile strength, which
mainly because the existence of the free radicals due to coupling agents result in
the composite’s deterioration and subsequent weakening of the tensile properties.},
DOI = {10.32604/jrm.2020.09961}
}