期刊
POLYMER COMPOSITES
卷 43, 期 2, 页码 1060-1077出版社
WILEY
DOI: 10.1002/pc.26434
关键词
composite recycling; green technology; natural fiber degradation; sustainable development; waste management
资金
- Ministry of Education
The study investigates the mechanical, thermal and thermomechanical behavior of hybrid composites post-recycling and the impact of additional reinforcement. The results show that recycling and additional reinforcement have a significant influence on the properties of hybrid composites, and reinforcing with SSL fibers can effectively restore lost properties.
The investigation explores mechanical, thermal and thermomechanical behavior of hybrid composites post-recycling, and subsequent, 5 wt.% additional reinforcement to the recyclate of sisal (SSL) fiber fly ash (FA)/polypropylene (PP) hybrid composite. Impact of recycling and 5 wt.% of SSL fiber reinforcement of the recyclate on mechanical properties of hybrid composites made of 15-30 wt.% SSL and 5-15 wt.% FA were investigated. Noticeably, after recycling, a minimal loss of 2.39% only in tensile and 2.20% in flexural strength were recorded for the hybrid composites fabricated with 15 wt.% each of FA and SSL. The highest loss in tensile (10.32%) and flexural (4.22%) strength were reported for only 30 wt.% SSL fiber reinforced PP indicating that hybridization with FA has a benign effect on reducing property degradation. These lost properties were regained by reinforcing recycled composites with 5 wt.% of SSL fiber. Mechanical studies showed that the composite with 30 wt.% SSL fibers recycled and reinforced with additional 5 wt.% fibers showed a substantial improvement of similar to 10% and similar to 4% in the tensile and flexural strength while keeping the impact strength stable. FE-SEM images confirmed a reduction (similar to 67%) in aspect ratio of the SSL fiber due to reprocessing. DMA demonstrated a decrease of similar to 11% in storage modulus of the composites after first recycling. TGA confirmed an insignificant change in the degradation temperature of the recycled and re-reinforced recycled composites versus fresh composites. The study paves the way for potential future recycling applications of waste natural fiber reinforced PP.
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