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

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Abstract

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.

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Acknowledgements

This work was supported by Prince of Songkla University, Thailand (Project No. SCI6402020S).

Funding

Funding was received for this work. All of the sources of funding for the work described in this publication are acknowledged below: financial support by Prince of Songkla University (Project Number SCI6402020S). Prince of Songkla University: study design, data analysis, and result interpretation.

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TK: conceptualization, methodology formal analysis, funding acquisition, investigation, project administration, resources, supervision, validation, writing—original draft, writing—review & editing. SK: methodology, formal analysis, investigation, validation, data curation, writing—review & editing, visualization. RH: methodology, resources.

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Correspondence to Thorsak Kittikorn.

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Kittikorn, T., Kadea, S. & Hedthong, R. Effect of Epoxidized Natural Rubber-Grafted-Modified Microfibrillated Cellulose to Compatibility in Wood Pulp/Polylactic Acid Biocomposite: Mechanical–Thermal and Durability Analysis. J Polym Environ 31, 2473–2485 (2023). https://doi.org/10.1007/s10924-023-02775-4

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