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Polyolefins are some of the most widely used plastics in the world due to being lightweight, low cost, and resistant to water and most chemicals. However, they are highly susceptible to photo-oxidative degradation under ultraviolet radiation, leading to environmental problems such as microplastic pollution, and furthermore making it difficult to recycle. In this paper, glycol-modified lignin (GL) is blended with polypropylene to form a bio-mimetic structure similar to human skin, in which melanin absorbs UV light and sunburned tissue is removed to reveal fresh skin. We show that GL acts as a simultaneous UV absorbent, antioxidant, and reinforcement, resulting in high retention of mechanical properties even after severe UV exposure, and nearly full recovery of the original properties after mechanical recycling. This performance is attributed to the compatibility of GL with maleic anhydride-grafted PP, which is greater than other types of lignin/polyolefin blends reported in the literature. This improves the durability and in-service performance of polyolefin-based composites and makes their end-of-life recycling possible. These results demonstrate the potential for more sustainable usage of polyolefins and biomass in various applications such as automobiles, containers, household items, and building components.

権利情報:

• In Copyright
  

キーワード: Lignin, Polyolefin, Recycle, Durability

刊行年月日: 2024-01-02

出版者: Royal Society of Chemistry (RSC)

掲載誌:

• Journal of Materials Chemistry A (ISSN: 20507488) vol. 12 p. 3014-3025

研究助成金:

• Ministry of Agriculture, Forestry and Fisheries J008722

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4712

公開URL: https://doi.org/10.1039/d3ta06230a

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更新時刻: 2025-01-04 16:30:39 +0900

MDRでの公開時刻: 2025-01-04 16:30:39 +0900