Effect of Epoxidized Natural Rubber-Grafted-Modified Microfibrillated Cellulose to Compatibility in Wood Pulp/Polylactic Acid Biocomposite: Mechanical–Thermal and Durability Analysis

The aim of this work was to enhance the performance of a wood pulp/polylactic acid (PLA) biocomposite using epoxidized natural rubber (ENR)–grafted-modified microfibrillated cellulose (MFC) as a novel compatibilizer. MFC was modified by two different methods of silanization:one with 3-(trimethoxysil...

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Bibliographic Details
Published in:Journal of polymers and the environment 2023-06, Vol.31 (6), p.2473-2485
Main Authors: Kittikorn, Thorsak, Kadea, Suding, Hedthong, Rattanawadee
Format: Article
Language:English
Subjects:
Accelerated tests
Biomedical materials
Cellulose
Chemistry
Chemistry and Materials Science
Chromophores
Compatibility
Compatibilizers
Composite materials
Durability
Environmental Chemistry
Environmental Engineering/Biotechnology
Flexural strength
Grafting
Impact resistance
Industrial Chemistry/Chemical Engineering
Materials Science
Natural rubber
OriginalPaper
Polylactic acid
Polymer Sciences
Pulp
Rubber
Silanes
Wood pulp
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Summary:The aim of this work was to enhance the performance of a wood pulp/polylactic acid (PLA) biocomposite using epoxidized natural rubber (ENR)–grafted-modified microfibrillated cellulose (MFC) as a novel compatibilizer. MFC was modified by two different methods of silanization:one with 3-(trimethoxysilyl) propyl methacrylate and the other with 3-aminopropyltriethoxyl silane. The two types of modified MFC were grafted onto ENR via a solution-casting method. Compared with the uncompatibilized biocomposite, the flexural strength and impact resistance of the biocomposite compatibilized with ENR-amino silanized MFC were increased by 168% and 261%, respectively. SEM images and DMTA analysis confirmed the compatibility among the three phases of pulp, PLA, and ENR. Meanwhile, the use of ENR-methacrylate silanized MFC as a compatibilizer in the biocomposite also demonstrated the improvement of compatibility compared with non-MFC and MFC systems. The durability of the biocomposites was assessed in an accelerated weathering test. The pulp/PLA/ENR-methacrylate silanized MFC showed the lowest degradation rate, due to the methacrylate group of silane acted as a chromophore to mitigate UV absorption. Graphical Abstract
ISSN:1566-2543
1572-8919
DOI:10.1007/s10924-023-02775-4