Preparation of Porous Poly(butylene succinate)(PBS)/Starch Blends for Absorption of Copper(II) ions

摘要

The porous composite adsorbent was prepared using directly the glycerol-plasticized poly(butylene succinate)(PBS) and corn starch that were melt blended by a twin screw extruder. The effect of different ratio of PBS to starch on volume stabilization of the composite adsorbent in the water was investigated, and the optimum mixing ratio was 100:25. The starch/PBS particles were treated by a-amylse on the condition of pH 5, the temperature 50℃. The major objective of this paper is to characterize the morphology in biodegradable PBS/starch blends using scanning electron microscopy. The effect of the dose of enzyme and hydrolysis time on removal efficiency of the composite adsorbent was studied. The results showed that the enzyme-treated starch/PBS particles had good adsorption efficiency for copper(II) ions compared to the starch/PBS particles. The optimum ratio of the starch to PBS was 100:25 and enzyme treatment condition was 2% (w/w) enzyme dosage (based on dry starch) and 8h hydrolysis time. Therefore the porous composite particles could be used as potential environmentally friendly materials.