الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Starch-based bio-plastic “SBP“ films could be prepared successfully by using Un-marketable potato plasticized and banana peel with any polyol such as glycerol. SBP films were produced from potato starch and banana peel past formulated with glycerol as plasticizer by casting method, in which heat and shear stress resulted by using magnetic stirrer under the assist of glycerol obliterate the granular and crystalline structure of potato starch, so flexible films were formed. SBP and BBP films were not sticky and easy to handle with 20 % glycerol concentration. It was found that, blending potato pieces gave a maximum extracted starch value (13.5 %). As far SBP and BBP physical properties, glycerol concentration affected the thickness and density of the films. While increasing the glycerol concentration leads to an increase in the thickness, the density decreases because of the relative increase in samples mass with any slight increase in size leads to a clear decrease in the density. SBP and BBP films 20 % glycerol, the average thickness and density were (0.25 mm and 80.11 Kg/m3) and (0.345 mm and 58.22 Kg/m3) respectively. Meanwhile, for OBP films the average thickness and density were (0.41 mm and 24.39 Kg/m3) respectively. Glycerol 20 % gave the best flexible compact structure SBP and BBP films. At 20 % glycerol, SBP and BBP films showed higher ability to adsorb water. Moreover it has higher ability to degrade after burial under soil within a period of three months (weight loss was 72 and 89.18%), compared OBP films that have no ability to degrade during the same period. As far the mechanical properties of SBP ; BBP and OBP films with glycerol 20 %, the maximum tensile strength (13.23; 1.73 and 1.12MPa); modulus of elasticity (1556.73 ; 96.36 and 44.97 MPa); firm Force (0.916; 0.82 and 1.08 N); mean required energy for firm (44.05; 54.45 and 31.06 N.mm) and the optimum elongation (100.77; 133.33 and 107.26 %). It was found that, for the prepared SBP and BBP films the values of the tensile strength and elongation which is two major mechanical properties for the plastic within range to make it has market potential. However, the higher ability to absorb water make SBP may not use in the food services industry and it is thought that some additives might have been added to commercial SBP for increasing resistance of water absorption, to be suitable for one time use packaging materials, since it is characterized by rapid decomposition. Therefore, producing starch based biodegradable plastic from un-marketable potato tuber and banana peel will used instead of oil based plastic and reduce the accumulation of MSW, and enhances rural economic, quality of life and ecosystem in general.
Recommendations:
- It is recommended to use fresh potato starch for better quality of the bio plastics.
- The waste extracted from the potato remaining and fibers could be used as compost or cattle feed or to produce biogas.
- A sustainability study of the starch-based plastic product can be performed to determine if it is economically, environmentally and socially acceptable.
- Sorbitol is a plasticizer that could be used as a substitute to glycerol in the process of production to improve the mechanical properties of bio plastic samples.
- We can exploit soak of water chips output of factories in extraction of starch.