Pengaruh Penambahan Serat Kulit Kopi dan PVA terhadap Karakteristik Biodegradable Foam dari Pati Kulit Singkong

Abstract

Polystyrene plastic or stryrofoam is very popular to be used as a food packaging container even though Styrofoam has a bad impact on health. In addition, Styrofoam also cannot be biodegraded naturally in the environment so that the use of Styrofoam is also a problem for the environment. One alternative to styrofoam is biodegradable foam (biofoam) made from starch and cellulose. It is  safe for health and can be broken down naturally.Cassava peel is rich in starch (carbohydrates) but has low cellulose content. Meanwhile coffee peel is rich in cellulose and minimal in carbohydrates. Both types of waste have the potential to become biodegradable foam raw materials. The addition of synthetic PVA polymer is expected to improve the mechanical quality of biodegradable foam. This study aims to obtain the best formulation for the manufacture of biodegradable foam from cassava starch with the addition of coffee peel cellulose and PVA. The quality of biofoam evaluated includes tensile strength, water absorption, and biodegradability. The best biofoam characteristics were obtained at the addition of 15% fiber and 15% PVA, resulted in water absorption of 28.87%, tensile strength of 2.70 N / mm2 and biodegradability of 93.66% for 30 days.