Long-term durability and ecotoxicity of biocomposites in marine environments: a review

Type Article
Date 2021-10
Language English
Author(s) Curto Marco1, Le Gall Maelenn2, Catarino Ana Isabel3, Niu Zhiyue3, Davies Peter2, Everaert Gert3, Dhakal Hom N.1
Affiliation(s) 1 : Univ Portsmouth, Sch Mech & Design Engn, Portsmouth PO1 3DJ, Hants, England.
2 : IFREMER Ctr Bretagne, Marine Struct Lab, Technopole Iroise, F-29280 Plouzane, France.
3 : Flanders Marine Inst VLIZ, Wandelaarkaai 7, B-8400 Oostende, Belgium.
Source RSC Advances (2046-2069) (Royal Soc Chemistry), 2021-10 , Vol. 11 , N. 52 , P. 32917-32941
DOI 10.1039/d1ra03023j
Abstract

There is a growing interest in replacing fossil-based polymers and composites with more sustainable and renewable fully biobased composite materials in automotive, aerospace and marine applications. There is an effort to develop components with a reduced carbon footprint and environmental impact, and materials based on biocomposites could provide such solutions. Structural components can be subjected to different marine conditions, therefore assessment of their long-term durability according to their marine applications is necessary, highlighting related degradation mechanisms. Through an up-to-date review, this work critically discusses relevant literature on the long-term durability of biocomposites specific for marine environments. Importantly, in this review we report the effects of abiotic parameters, such as the influence of hygrothermal exposures (temperatures and UV radiation) on physical, mechanical and thermal characteristics of biocomposites. Furthermore, we identify and discuss the potential ecotoxicological effects of leaching substances and microplastics derived from biocomposites, as well as the change in mechanical, physical and thermal behaviours correlated to degradation in the fibre matrix interface, surface defects and overall deterioration of the composite's properties. Finally, the combined effects of various environmental exposures on the long-term durability of the biocomposites are critically reviewed.

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