Plastic bag prepared from modified sorghum straw

Abstract

The invention discloses a plastic bag prepared from modified sorghum straw. The plastic bag is prepared from linear low density polyethylene, the modified sorghum straw, alpha-methylstyrene cyclic dimer, glycerol monooleate, starch, rosin, acrylamide, C9 petroleum resin, biphenol acrylate and polyvinyl alcohol. According to the plastic bag prepared from the modified sorghum straw, the sorghum straw resources can be well utilized, the problem of poor compatibility of the sorghum straw and plastic is solved, and the prepared plastic bag is greatly improved on the performance in all aspects and has the advantages of being low in energy consumption, small in pollution and low in protection cost. The longitudinal tensile strength of the plastic bag can reach 16.7 MPa, and the transverse tensile strength of the plastic bag can reach 15.5 MPa. The plastic bag is bright in gloss, good in transparency, high in bearing capability and capable of meeting the requirements of consumers for containing more articles and using repeatedly.

Description

technical field [0001] The invention relates to the field of plastic production, in particular to a plastic bag prepared from modified sorghum stalks. Background technique [0002] As a widespread natural agricultural waste resource, sorghum straw has the characteristics of wide source, cheap, renewable and non-polluting, and is increasingly favored as a polymer material due to its excellent biodegradable properties. The main component of sorghum straw is cellulose, followed by hemicellulose and lignin. Cellulose, hemicellulose and lignin are tightly combined. The molecular chains of sorghum stalks are very rigid and polar, highly crystalline and oriented, which can endow the composite with high modulus tensile strength and bending strength. However, due to the strong hydrogen bond between the hydroxyl groups of sorghum straw and phenolic hydroxyl groups, the activity is extremely poor, making it difficult for the hydroxyl groups to interact with other atoms or groups, whic...

AI Technical Summary

Problems solved by technology

However, due to the strong hydrogen bond between the hydroxyl groups of sorghum straw and phenolic hydroxyl groups, the activity is extremely poor, making it difficult for the hydroxyl groups to interact with other atoms or groups, which directly affects the adhesion of sorghum straw to the resin matrix. The performance of the prepared material is not good enough to meet the needs of making plastic bags