| Summary: | 碩士 === 大葉大學 === 食品工程研究所 === 90 === Abstract
In the past few decades, the non-biodegradable tableware were used too much and caused the ecological environment destruction. It is important to search for a water-resistant film application to the hygiene and the environmental protection tableware and containers made of cereals and bamboos. Different ratios of the konjac powder and xanthan gum were mixed and adjusted to different pH value with Na2CO3, Na2HPO4, NaOH to make a hydrate gum. They were dried at different temperatures ( room temperature, 50℃, 90℃) to make water-resistant films. The best water-resistant film was chosen to conduct the simulating food test ( water, 15% alcohol, 3% acetic acid, corn oil ) and the ISO14855 biodegradable test.
The best water-resistant film was made with 60% konjac powder and 40% xanthan gums and pH adjusted to 11.2 with 0.5g Na2CO3 followed by drying at room temperature. In the simulating food test, the products coated with the hydrate gum lasted longer than those without coating. The hydrate gum coating didn’t influence the degrading rate of the product in the ISO14855 biodegradable test.
Keywords：konjac powder, xanthan gum, hydrate glue, simulating food, ISO14855 biodegradable test
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