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Effect of Water Soluble Polymer on Structure and Mechanical Properties of Bacterial Cellulose Composites

Yudianti Rike نويسنده , Indrarti Lucia نويسنده

177

180

4

Bacterial Cellulose (Be) sheet has a remarkably high elastic modulus and crystallinity inhibiting its processing. Short fibers of homogenized Be are utilized in Bacterial Cellulose Composites (Bee) formation. Water Soluble Polymers (WSP) (Carboxymetbyl Cellulose (CMC) aud glycerol) present in homogenized BC fiber have significant effects on mechanical properties and structure. Increasing CMC concentrations from 0 to 0.75% causes crystallinity index reduction from 81 to 61, 76 to 53 and 70 to 50% when treated glycerol concentrations of 0, 0.25 and 0.5%, respectively. Increasing CMC concentrations from 0 to 0.75% enhances elastic modulus from 2907.5 to 6245, 180.4 to 1581.3 aud 30.5 to 212.5 Gpa greatly under glycerol concentrations of 0, 0.25 aud 0.5%, respectively. Increasing tensile strengths from 64.8 to 167.7, 52.7 to 78.2 aud 17.5 to 41.3 MFa aud elongation reduction from 4.9 to 2.5, 14.5 to 9.2 and 29.6 to 23% occurs at glycerol concentrations of 0, 0.25 and 0.5%, respectively when CMC concentrations increased from 0 to 0.75%. Conversely, effects of glycerol treatment on tensile strength, elastic modulus and elongation are also presented in this study. Combination of CMC and glycerol treatment into homogenized BC is quite possible to modify BC characteristic as good processing BC.

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