| Summary: | 碩士 === 大同大學 === 材料工程學系(所) === 106 === In this study, the biodegradable blends were studies. The blends were produced by incorporating sebacic acid (SA) and α-cellulose into starch/ sebacic acid /glycerol (GS) blends. The α-cellulose was treated by enzyme with various concentrations(0.3, 2, 4, 6, 8, 10 vol%). Furthermore, the Ecoflex was added into above blends the increase the elongation of blends. The aim of this study was to assess the effect of the α-cellulose enzyme treated with a variety of concentration on the mechanical properties of blends. The mechanical properties, surface morphology properties and thermal properties of blends were studied.
The original α-cellulose could be hydrolyzed to form microcrystal cellulose(MCC)/nanocrystal cellulose(NCC) by enzyme(Cellic CTec3). The reinforces efficiency of MCC/NCC on the blends was very well. The tensile strength of blend up from 4MPa to 14MPa. The α-cellulose was also affecting the mechanical properties of blends markedly. The morphology of blends were observed by SEM. As Ecoflx was added into GS, the Ecoflex disrupts the starch granules and the elongation of blend up from 90% to 190%. As MCC/NCC was added into GS and starch/ sebacic acid /glycerol/Ecoflex (GSE), the starch is convex spots. The tensile strength of blends increased as MCC/NCC was added. It was because that the MCC/NCC will increase the friction of the chain slipping. Above 350℃, the weight loss of blends will be decreased as the Ecoflex was added. All the blends are mostly amorphous. However, the sample has slightly exothermic peak occurred as the α-cellulose was added.The biodegradation rate of blends is good. After three weeks soil buried, the weight loss of blends are about 70 wt%.
Finally, the easy biodegradable α-cellulose added starch base blends were produced in this study
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