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Characteristics of polypropylene biocomposites: effect of chemical treatment to produce cellulose microparticle

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Abstract

In this study, cellulose microparticle were prepared by sulfuric acid hydrolysis, glyoxal crosslinking and acetylation followed by air classifying mill, and their properties including chemical structure, particle size, appearance and crystallinity were investigated. The effect of cellulose microparticle properties on characteristics of polypropylene (PP) biocomposite, such as physical, thermal and mechanical properties, was also examined. The glyoxal crosslinking enhanced the brittleness of pulp fiber, resulting in smallest particle size of cellulose microparticle and thus less entanglement in the polymer matrix. When cellulose microparticle were incorporated into PP, the crystallinity of biocomposite decreased, irrespective of microfiber type due to interference crystallization during crystal growth. Additionally, glyoxal crosslinked cellulose microparticle decreased the crystallization temperature of biocomposite, which is different from the other types of cellulose microparticle. The good dispersibility and brittleness of glyoxal crosslinked cellulose microparticle contributed to enhanced mechanical properties of biocomposite compared to the other cellulose microparticle added biocomposites.

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Acknowledgments

This study was carried out with the support of 'Forest Science & Technology Projects (Project No. 2020214B10-2222-AC01) provided by Korea Forest Service.

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Correspondence to Wanhee Im.

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Moon, J., Lee, J.H., Gwak, K. et al. Characteristics of polypropylene biocomposites: effect of chemical treatment to produce cellulose microparticle. Cellulose 29, 6733–6743 (2022). https://doi.org/10.1007/s10570-022-04691-7

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  • DOI: https://doi.org/10.1007/s10570-022-04691-7

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