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Journal of Applied Sciences

Year: 2008 | Volume: 8 | Issue: 1 | Page No.: 177-180
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Authors

Rike Yudianti

Lucia Indrarti

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Research Article

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

Rike Yudianti and Lucia Indrarti
Bacterial Cellulose (BC) sheet has a remarkably high elastic modulus and crystallinity inhibiting its processing. Short fibers of homogenized BC are utilized in Bacterial Cellulose Composites (BCC) formation. Water Soluble Polymers (WSP) (Carboxymethyl Cellulose (CMC) and 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 and 30.5 to 212.5 Gpa greatly under glycerol concentrations of 0, 0.25 and 0.5%, respectively. Increasing tensile strengths from 64.8 to 167.7, 52.7 to 78.2 and 17.5 to 41.3 MPa and 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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