Butylated lignin as a compatibilizing agent for polypropylene-based carbon fiber-reinforced plastics

Abstract

Lignin is a renewable resource, but it is also considered a waste or a very-low-value material. Herein, we propose a lignin-derived compatibilizing agent as an alternative to the current compatibilizing agents. We prepared a polypropylene-based carbon fiber-reinforced plastic (CFRP) with butylated lignin (C4 lignin). Upon the addition of C4 lignin, the dispersion of carbon fiber into the matrix, and the adhesion between the carbon fiber and the matrix were greatly improved. As a result, the tensile strength of the CFRP prepared with C4 lignin was greater than that of the CFRP without lignan lignin (37.1 compared to 40.2 MPa). This value is close to that of CFRPs prepared with maleic anhydride-modified polypropylene (40.9 MPa), an existing compatibilizing agent. C4 lignin is a promising candidate for biomass-derived compatibilizing agents for polypropylene-based CFRPs.

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Acknowledgements

This research was promoted by the COI program, “Construction of next-generation infrastructure using innovative materials—Realization of safe and secure society that can coexist with the Earth for centuries” supported by MEXT and JST. This study was also supported in part by an Advanced Low Carbon Technology Research and Development Program of the JST and the Cross-ministerial Strategic Innovation Promotion Program, also from the JST. This study was also partly supported by KAKENHI (18K14281) and Leading Initiative for Excellent Young Researchers from the Japan Society for the Promotion of Science.

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Correspondence to Kosuke Kuroda or Kenji Takahashi.

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Sakai, H., Kuroda, K., Tsukegi, T. et al. Butylated lignin as a compatibilizing agent for polypropylene-based carbon fiber-reinforced plastics. Polym J 50, 997–1002 (2018). https://doi.org/10.1038/s41428-018-0088-9

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