| Abstrakt: |
Fillers improve the thermal stability and mechanical properties of bio-plastics. This research aims to synthesize and characterize biodegradable film from mango seed kernel starch reinforced with micro-pottery clay using glycerol as a plasticizer. The mango seed kernel starch was extracted and characterized in terms of solubility (75.01 ± 0.35%), swelling power (22.3 ± 0.24%), moisture content (10.33 ± 0.21%), ash content (0.41 ± 0.13%), and yield of starch (19.97 ± 0.021%). Pottery clay to starch ratios of 0, 5, 7, and 10% w/w, and glycerol to starch ratios of 0, 25, 30, and 35% w/v were evaluated. The film was analyzed for its physicochemical properties such as tensile strength, thickness, transparency, and biodegradability. Furthermore, the surface functional groups, morphology, and thermal properties of the film were analyzed using FT-IR, SEM, 3D optical surface profiler, and TGA. The control film has a tensile strength of 3.33 ± 0.008Mpa whereas the tensile strength of the reinforced film is 7.66 ± 0.012 MPa. The maximum biodegradation rate of the film is 74.38 ± 0.012 at 35% glycerol concentration. Increasing the amount of glycerol increased the solubility of the biodegradable film due to its strong affinity towards water molecules. Glycerol increases film thickness and reduces its transparency. The microstructure results indicate that clay particles are homogeneously dispersed with reduced surface roughness of reinforced films compared to the control. The mango seed kernel starch film reinforced with 5% pottery clay and 25% glycerol was selected based on tensile strength, thermal stability, and biodegradability properties. In summary, the addition of glycerol and pottery clay significantly affects the physicomechanical and thermal properties of films. [ABSTRACT FROM AUTHOR] |
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