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Study on composite edible preservative films made of Sodium Carboxy Methylcellulose (CMC)
Study on composite edible preservative films made of Sodium Carboxy Methylcellulose (CMC)
An edible and composite preservative film was prepared with different blending ratios of Konjac Glucomannan (KGM), Chitosan and Sodium Carboxy Methylcellulose (CMC). The physical properties of the films such as water-vapor transmission ratio, tensile strength, oxygen barrier capacity and elongation at break were also examined. The results indicated that the blend system had a conditional miscibility, the optimal technical parameters are as follow: KGM∶CTS∶CMC was 1∶2∶1, glycerin content was 1.5% and the dryness temperature at 40℃. A new crystal occurred and hydrogen bonding interaction was strengthened when the preservative film had a nice breaking elongation, a good tensile strength, and the least water-vapor transmission ratio and gas barrier property at the same ratio. All the preservative films showed a wonderful water-solubility and could dissolve in short time.
An edible and composite preservative film was prepared with different blending ratios of Konjac Glucomannan (KGM), Chitosan and Sodium Carboxy Methylcellulose (CMC). The physical properties of the films such as water-vapor transmission ratio, tensile strength, oxygen barrier capacity and elongation at break were also examined. The results indicated that the blend system had a conditional miscibility, the optimal technical parameters are as follow: KGM∶CTS∶CMC was 1∶2∶1, glycerin content was 1.5% and the dryness temperature at 40℃. A new crystal occurred and hydrogen bonding interaction was strengthened when the preservative film had a nice breaking elongation, a good tensile strength, and the least water-vapor transmission ratio and gas barrier property at the same ratio. All the preservative films showed a wonderful water-solubility and could dissolve in short time.
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