Preparation method of edible and biodegradable tableware

A preparation method of an edible and biodegradable tableware, the preparation method consisting of:

• preparing a mixed aqueous solution of a gel A and a crosslinker under a heating condition, and preparing a tableware mold after cooling;
• placing the prepared tableware mold into an aqueous solution of a gel B, and standing to crosslink the gel B and the crosslinker in the tableware mold on the surface of the mold to form a tableware model;
• and separating the tableware model from the mold, and drying the tableware model after separation, so as to obtain a finished tableware;
• wherein
• the crosslinker is dispersed in the gel mold formed by the gel A and does not crosslink with the gel A;
• a crosslinking reaction occurs between the gel B and the crosslinker;
• the gel A is one or more of agar and agarose;
• the crosslinker is one or more of calcium chloride, zinc chloride, calcium acetate, zinc acetate, calcium gluconate, zinc gluconate, zinc lactate, calcium lactate, potassium cholride, sodium phytate;
• the gel B is one or more of carrageenan, sodium alginate, pectin, gellan gum, and chitosan;
• the solution of the gel B contains a plasticizer;
• the plasticizer is glycerol;
• the concentration of the plasticizer in the solution of the gel B is 10% by weight;
• an edible waterproof coating is applied by spraying, dipping or brushing on the inner and/or outer surface of the finished tableware;
• and
• the tableware consisting of:
• a straw, a cup, a bowl, a dish, and a spoon.