Starch film and method for manufacturing starch foam

1. A method for manufacturing starch foam, comprising:

modifying a starch by a cross-linking agent, wherein the cross-linking agent comprises glycidyl methacrylate (GMA), and the cross-linking agent is 1 to 10 weight parts based on the starch of 100 weight parts;

mixing the modified starch with a nucleating agent and a foaming agent to form a foamable mixture; and

foaming the foamable mixture to form a foam.

2. The method as claimed in claim 1 , wherein the starch comprises a cereal, or a root crop.

3. The method as claimed in claim 2 , wherein the cereal includes rice, wheat or corn.

4. The method as claimed in claim 1 , wherein the nucleating agent comprises calcium carbonate, calcium hydroxide or silicate.

5. The method as claimed in claim 1 , wherein the foaming agent comprises water, carbon dioxide, nitrogen, oxygen, air or alcohol.

6. The method as claimed in claim 1 , wherein the modified starch further mixes with an additive, a plasticizing agent or combinations thereof.

7. The method as claimed in claim 6 , wherein the additive comprises polyvinyl alcohol.

8. The method as claimed in claim 6 , wherein the plasticizing agent comprises glycerol.

9. The method as claimed in claim 1 , wherein the foaming step comprises mold press foaming or extrusion foaming.

10. The method as claimed in claim 9 , wherein the mold press foaming and the extrusion foaming are performed at a temperature of 120-180° C.

11. The method as claimed in claim 1 , wherein the starch foam has a biodegradation lower than 10% in a duration of 180 days.