Mechanical and thermal properties of spent coffee bean filler/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) biocomposites: Effect of recycling
| Autor: | Senthil Muthu Kumar T, Varada Rajulu A, Krittirash Yorseng, Nadir Ayrilmis, Suchart Siengchin, Nagarajan Rajini |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
021110 strategic defence & security studies Filler (packaging) Environmental Engineering Materials science General Chemical Engineering 0211 other engineering and technologies 02 engineering and technology Polymer 010501 environmental sciences Polyethylene 01 natural sciences Low-density polyethylene chemistry.chemical_compound chemistry Ultimate tensile strength Environmental Chemistry Thermal stability High-density polyethylene Composite material Biocomposite Safety Risk Reliability and Quality 0105 earth and related environmental sciences |
| Zdroj: | Process Safety and Environmental Protection. 124:187-195 |
| ISSN: | 0957-5820 |
| Popis: | Green composites were fabricated using poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) as the matrix and spent coffee bean powder (SCBP) as a filler by simple solution casting method. The effect of varying concentrations (5–25 wt.%) of SCBP on the thermal and mechanical properties was studied. The SCBP filler had better thermal properties than the matrix and the composites. There was slight increase in the glass transition temperature of the composites with higher concentration of the filler when compared to the PHBV matrix. The weight remaining at endset temperatures of the composites was found to be higher than for the matrix indicating enhanced thermal stability. The contact angle of the composites increased with increasing filler content changing from 75.8° to 97°. The tensile strength and modulus of the composite films reduced with increasing filler concentration but a reverse trend was observed in case of the % elongation at break. However, the tensile properties were comparable with other synthetic polymers such as LDPE, HDPE etc. Furthermore, the recycling of films did not significantly affect the mechanical and thermal properties. Hence, with comparable thermal and tensile properties, these biocomposite films can be considered for replacing the conventional synthetic non-biodegradable polymers such as polyethylene and polypropylene for packaging applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect