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Behaviour of a self-reinforced polylactic acid (SRPLA) in seawater
LeGall, M.; Niu, Z.; Curto, M.; Catarino, A.I.; Demeyer, E.; Jiang, C.; Dhakal, H.; Everaert, G.; Davies, P. (2022). Behaviour of a self-reinforced polylactic acid (SRPLA) in seawater. Polymer Testing 111: 107619. https://dx.doi.org/10.1016/j.polymertesting.2022.107619
In: Polymer Testing. Elsevier SCI Ltd: Oxford. ISSN 0142-9418; e-ISSN 1873-2348
Peer reviewed article  
Available in  Authors 
    Vlaams Instituut voor de Zee: Open access 376948 [ download pdf ]
Keyword
    Marine/Coastal
Author keywords
    olylactic acid; Marine environment; Mechanical properties; Durability; Microplastics; Moisture absorption
Authors  Top 
  • LeGall, M.
  • Niu, Z.
  • Curto, M.
  • Catarino, A.I.
  • Demeyer, E.
  • Jiang, C.
  • Dhakal, H.
  • Everaert, G.
  • Davies, P.
Abstract
    The goal of this study was to determine whether a bio-based self-reinforced polylactic acid (SRPLA) is suitable for use in structures deployed in the marine environment. The material was produced from co-mingled fibres with different melting points. Two key criteria, durability during service and microplastic formation, were examined. To assess durability, mechanical properties, tension and transverse impact, were used to quantify the influence of seawater ageing for up to 24 months. After seawater ageing at 40 °C for 12 months, composite strength was completely degraded. To assess microplastic formation, specimens of SRPLA were exposed in seawater to accelerated ultraviolet (UV) radiation simulating natural exposure for up to 18 months. Fluorescence microscopy and infrared technology were used to quantify and characterise the microplastics formed. Their number was independent of UV exposure, suggesting short-term UV radiation does not accelerate SRPLA microplastic formation. We discuss the potential for SRPLA to be considered a promising material for sustainable marine applications.
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