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Sinaya: A Philippine Journal for Senior High School Teachers and Students

Theme

Science and Technology

Title in Filipino [Pamagat ng Pananaliksik]

Bio-PAPCZ: Ang Corn Starch–Based Composite Bioplastic na Pinahusay gamit ang Pineapple Leaf Fiber (PALF), Zinc Oxide (ZnO), at Polyvinyl Alcohol (PVA)

Research Advisor

Mr. Ruel M. Levida

Abstract

Plastic pollution poses a serious global threat, as petroleum-based plastics persist for centuries, and their surging production of over 450 million tons overwhelms ecosystems (Ritchie et al., 2023). Using a quantitative experimental research design, the study examined the effects of varying concentrations of cornstarch-based bioplastic reinforced with pineapple leaf fiber (PALF), polyvinyl alcohol (PVA), and zinc oxide (ZnO) on the bioplastic’s tensile strength and soil degradability. Sample C2 (ZnO 3.0 %w/w; PVA 9.0 %w/w) demonstrated the optimal tensile properties with a tensile strength of 0.76 MPa and an elongation at break of 6.40%, which was attributed to the addition of ZnO (0.3 g), combating the hydrophilic nature of starch by filling the gaps within the polymer matrix, and PVA (0.9 g) and PALF, which improved the tensile strength. The combination of sample C2 suggested an optimal balance of the reinforcements for a more structure-focused bioplastic. Additionally, sample C3 (ZnO 2.9 %w/w; PVA 11.7 %w/w) exhibited the fastest degradation rate and a total weight loss of 27.24% of the initial weight, due to a higher PVA concentration (1.2 g), leading to increased hydrophilicity and biodegradability. The combination of sample C3 indicated an optimal balance of reinforcement for a more degradable bioplastic. These results highlight the trade-off between the structural performance and biodegradability, underscoring the potential impact of varying cornstarch-based bioplastic reinforced with PALF, PVA, and ZnO on sustainable materials.

Abstract in Filipino [Abstrak]

Nagdudulot ng malubhang banta sa kalikasan ang polusyon mula sa plastik, lalo na at nananatili sa kalikasan ang mga petroleum-based na plastik sa loob ng daantaon. Dagdag pa rito, ang patuloy na pagtaas ng produksiyon nito na lumalagpas sa 450 milyong tonelada ay lalong nagpapabigat sa kalagayan ng ecosystem (Ritchie et al., 2023). Gumamit ang pag-aaral na ito ng kwantitatibong eksperimental na disenyo upang suriin ang epekto ng iba’t ibang konsentrasyon ng cornstarch-based bioplastic na pinahusay gamit ang pineapple leaf fiber (PALF), polyvinyl alcohol (PVA), at zinc oxide (ZnO) sa tensile strength at biodegradability nito sa lupa. Ipinakita ng Sample C2 (ZnO 3.0 %w/w; PVA 9.0 %w/w) ang pinakamainam na tensile properties, na may tensile strength na 0.76 MPa at elongation at break na 6.40%. Iniuugnay ito sa pagdaragdag ng ZnO (0.3 g), na tumutulong sa pagbawas ng hydrophilic na katangian ng starch sa pamamagitan ng pagpuno sa mga gap sa polymer matrix, gayundin sa PVA (0.9 g) at PALF na nakapagpapataas ng tensile strength. Samantala, ipinakita ng Sample C3 (ZnO 2.9 %w/w; PVA 11.7 %w/w) ang pinakamabilis na biodegradation, na may kabuoang pagbaba ng timbang na 27.24% mula sa orihinal, bunga ng mas mataas na konsentrasyon ng PVA (1.2 g) na nagdulot ng mas mataas na hydrophilicity at biodegradability. Nangangahulugan na ang kombinasyon ng sample C3 ang pinakamainam na balanse ng mga reinforcement para sa mas mataas na biodegradability ng bioplastic. Ipinapakita ng mga resultang ito ang ugnayan sa pagitan ng structural performance at biodegradability, at itinatampok ang potensiyal ng cornstarch-based bioplastic na pinahusay gamit ang PALF, PVA, at ZnO bilang isang sustainable na materyal.

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