Elaboración de láminas biodegradables a partir de los residuos del almidón de yuca(Manihot esculenta)

This research aimed at developing biodegradable sheets from the residues of cassava (Manihot esculenta) starch as an alternative to reduce contamination caused by non-biodegradable residues, as an alternative to using common plastic. The selection of the raw material to be used and its proportions were stablished; due to its availability, cassava starch was used in the highest proportion (80%, 50%, 30%); in addition, water, glycerin and vinegar were used as plasticizers, because of the additional properties that they provide to the plastic. The materials formed 3 mixtures in w/w ratio; 80% starch + 13% water + 0.3% acetic acid + 6.7 glycerin; 50% starch + 42% water + 0.4% acetic acid + 7.6 glycerin; and 30% starch + 5% acetic acid + 8.5 glycerin, each mixture was blended, heated (between 60°C and 67°C) and poured into molds, 6 experimental units of 100g for each mixture were prepared, forming 18 sheets of 15x10 cm. 9 sheets were buried and 9 were left outdoor for 90 days, monitoring was done twice a week until reaching at least 90% of degradation. Treatment 1 which used the highest proportion of raw material (80%) showed the highest degradation time 90.67 ± 0.58 and 59.67 ± 1.53 days outdoor and buried respectively, with a cost of $ 2.82 per sheet.

• Tác giả chính: Menoscal Chichanda, Richard Esteven (author)
• Tác giả khác: Rodríguez Mendoza, Elvin Daniel (author)
• Định dạng: bachelorThesis
• Ngôn ngữ: spa
• Được phát hành: 2017
• Những chủ đề: Almidón de yuca; Biodegradabilidad; Componentes; Plástico común
• Truy cập trực tuyến: http://repositorio.espam.edu.ec/handle/42000/623