Sustainable Development of Antimicrobial Polyvinyl Chloride Bioplastics Using Chlamydomonas reinhardtii Extract | ||
| Egyptian Journal of Chemistry | ||
| Volume 68, Issue 8, August 2025, Pages 77-96 PDF (12.21 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejchem.2025.361490.11327 | ||
| Authors | ||
| Gehad mohammed Taha* 1; Sayeda M. Abdo2; Entsar Mohamed Ahmed1; Ahmed Darwish El-Gamal3; Rawheya A. Salah El Din1 | ||
| 1Botany and Microbiology Department, Faculty of Science, Al-Azhar University (Girls Branch, Cairo), Nasr City 11754, Cairo, Egypt | ||
| 2Water Pollution Research department, National Research Centre, Cairo 12622, Egypt | ||
| 3Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt | ||
| Abstract | ||
| The green microalga Chlamydomonas reinhardtii was utilized for bio-based plastic production, focusing on optimizing polyhydroxybutyrate (PHB) synthesis. Optimal cultivation conditions (40 °C, pH 8.8, light intensity 1100 lux, salinity 0.15 M) yielded 102.84 ± 0.5 mg/g of PHB, while phosphorus-free media with 2 g/L sodium acetate achieved a maximum of 201 ± 0.5 mg/g. Bioplastic films were developed by blending polyvinyl chloride (PVC) with C. reinhardtii extracts (0-75%). The 50% algal extract/PVC blend exhibited the best mechanical properties, with a tensile stress of 9.41 MPa and 2% elongation. Chloroform extracts of C. reinhardtii showed significant antimicrobial activity against bacteria and fungi, with the highest inhibition (31 ± 0.28 mm) against Staphylococcus aureus. This study highlights the potential of C. reinhardtii-based biodegradable antimicrobial bioplastics as eco-friendly alternatives to conventional plastics. | ||
| Keywords | ||
| Bioplastic films; Polyhydroxybutyrate (PHB); Chlamydomonas reinhardtii; antimicrobial activity | ||
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