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KMID : 0380619940260020133
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Korean Journal of Food Science and Technology
1994 Volume.26 No. 2 p.133 ~ p.137
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Functional Properties of Cellulose - Based Films
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김영호/Kim, Young Ho
김길환/김동만/박현진/Kim, Kil Hwan/Kim, Dong Man/Park, Hyun Jin
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Abstract
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Functional properties of packaging films prepared with cellulose derivatives were measured. As a presolvation treatments of celluloses, 95% ethanol solution for methylcellulose (MC), hydroxypropylmethylcellulose (HPMC) and ethylcellulose (EC) and water for hydroxypropyl cellulose (HPC) were used. For film sheeting, the ethanol concentration of final cellulose solution should exceed 50% for MC, HPMC and HPC and 80% for EC. Thickness and functionalities of the prepared films were varied by type, molecular weight and viscosity of the cellulose and kind of plasticizer used. Tensile strength of MC, HPMC and HPC films were 67.7∼275.4 MPa, 124.6∼260.0 MPa, and 14.8∼29.4 MPa, respectively. The strength of MC and HPMC films was higher than that of low density polyethylene (LDPE) films (13.1∼27.6 MPa). Solubility of the cellulose films varied widely by plasticizer used and the films containing polyethyleneglycol (PEG) as a plasticizer was more soluble than the films by glycerol. Maximum water vapor permeability and oxygen permeability of the cellulose films was more than 1,000 folds and less than one-twelfth of the LDPE film, respectively.
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