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Biodegradable polylactic acid/polyhydroxybutyrate-co-hydroxyvalerate blend composites with microcrystalline cellulose – mechanical, rheological and thermal investigation
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Researchers developed and characterized biodegradable polymer composites by blending polylactic acid and polyhydroxybutyrate-co-hydroxyvalerate with microcrystalline cellulose at 5, 10, and 15 wt%. The cellulose filler strengthened the composites and improved resistance to aging, though loadings above 10 wt% reduced mechanical properties, demonstrating the potential of these fully biodegradable materials as environmentally friendly alternatives to conventional plastics.
The primary objective of the study was to conduct mechanical, dynamic, thermal, and rheological analyses of composites based on PLA/PHBV blends.Specifically, three composites were produced with microcrystalline cellulose content at 5, 10, and 15 wt.%.These materials were also subjected to aging tests.The findings of the study reveal the strengthening effect of microcrystalline cellulose and its positive impact on resistance to environmental factors.However, it is important to note that an excessive amount of filler decrease strength properties and processing issues.Despite this limitation, the study demonstrates the significant potential for using microcellulose and biodegradable PLA/PHBV blends to create high-strength, environmentally friendly polymer composites.
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Researchers developed biodegradable biocomposites from PLA/PHB polymer blends reinforced with microcrystalline cellulose, finding that adding up to 4 wt% cellulose improved material properties, while higher loadings at 7 wt% reduced crystallinity and thermal stability due to filler aggregation.
Aging Process of Biocomposites with the PLA Matrix Modified with Different Types of Cellulose
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Researchers prepared polylactic acid composites with three different cellulose-based fillers and studied how they age under UV light exposure. The study found that the type of cellulose additive plays a crucial role in how well the material resists UV degradation, with some forms improving both mechanical properties and degradation timing. These findings support the potential of biodegradable polymer composites as alternatives to conventional plastics that generate persistent microplastic waste.
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This study investigated how crystallization processes affect the hardness of composites made from cellulose nanofibers and polylactic acid, a biodegradable plastic, with implications for replacing conventional fossil-fuel-based plastics.
Study of Thermal and Mechanical Properties of Tertiary Blend of Poly(lactic acid), Poly(hydroxybutyrate-co-hydroxyvalerate) and Thermoplastic starch
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This study examined how blending poly(lactic acid), poly(hydroxybutyrate-co-hydroxyvalerate), and thermoplastic starch at different ratios affects the thermal and mechanical properties of biodegradable plastic composites. The results support the development of compostable alternatives to conventional single-use petroleum-based plastics.
Mechanical properties of fibre/ filler based poly(Lactic Acid) (Pla) composites : A brief review
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This review examines the mechanical properties of polylactic acid (PLA)-based composites reinforced with natural fibers and fillers, presenting PLA as a biodegradable alternative to conventional plastics in applications ranging from agriculture to biomedical devices. Improving the strength and durability of bio-based plastics is essential for replacing petroleum-based materials that generate persistent microplastic pollution.
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