The Effect of Glycerol Content on Physical and Mechanical Properties of the Biodegradable Film from Sweet Potato Flour for Plastic Plant Bag Application
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Abstract
Abstract
This research aimed to study the effect of using glycerol as a plasticizer on physical and mechanical properties of a biodegradable film made from sweet potato flour. This film was used to make biodegradable plastic plant bags. The film was prepared by dissolving sweet potato flour in water to the concentration of 5 wt%. To study the effect of the glycerol content, the glycerol was added at 5 levels; 0, 25, 50, 75 and 100 wt%. The film was casted in a molded and dried at 60 oC for 24 h. The thickness of the films was in the range of 0.37-0.42 mm. The aw of films ranged from 0.40 to 0.47. The water solubility, water vapor permeability and softness of the film increased with the increasing of glycerol content. Tensile and puncture strength of the flour films increased with the decrease of the glycerol content. After the films were buried under the ground (8-10 cm depth) for 3 weeks, they were degraded by 100%. The sweet potato flour film with 50 wt% glycerol showed the best overall properties.
Article Details
บทความที่ได้รับการตีพิมพ์เป็นลิขสิทธิ์ของ วารสารวิทยาศาสตร์และเทคโนโลยี มหาวิทยาลัยอุบลราชธานี
ข้อความที่ปรากฏในบทความแต่ละเรื่องในวารสารวิชาการเล่มนี้เป็นความคิดเห็นส่วนตัวของผู้เขียนแต่ละท่านไม่เกี่ยวข้องกับมหาวิทยาลัยอุบลราชธานี และคณาจารย์ท่านอื่นๆในมหาวิทยาลัยฯ แต่อย่างใด ความรับผิดชอบองค์ประกอบทั้งหมดของบทความแต่ละเรื่องเป็นของผู้เขียนแต่ละท่าน หากมีความผิดพลาดใดๆ ผู้เขียนแต่ละท่านจะรับผิดชอบบทความของตนเองแต่ผู้เดียว
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