Starch foaming material and preparation method thereof

Abstract

The invention relates to a starch foaming material and a preparation method thereof. The starch foaming material comprises the following components by weight: 70-90 parts of a starch base material; 0.5 to 10 parts of a plasticizer; 0.5 to 5 parts of a nucleating agent; 0.5-5 parts of a foaming agent; 10 to 15 parts of a gelatinizing agent; wherein the foaming agent is any one of citric acid and sodium carbonate; the gelatinizing agent is water. The starch foaming material adopts the citric acid or sodium carbonate as the foaming agent and adopts the water as the gelatinizing agent, the research and development thought of taking water as a foaming system in the traditional technology is changed, a foaming agent-water composite foaming system is adopted, citric acid can release carbon dioxide at a high temperature, sodium carbonate can react with water to generate sodium bicarbonate, carbon dioxide is released after heating, generation of the carbon dioxide enables the starch foaming material to generate uniformly distributed pores from inside to outside, the finally obtained starch foaming material has high foaming rate and uniform pores, the buffering performance of the starch foaming material is improved, and the requirement of the buffering packaging material is met.

Description

technical field [0001] The invention relates to the technical field of cushioning packaging materials, in particular to a starch foaming material and a preparation method thereof. Background technique [0002] With the rapid development of industrial technology, petroleum-based foam plastics are widely used in production and life, which not only brings convenience to human beings, but also causes serious negative impacts on the environment. This is because petroleum-based foam plastics are difficult to degrade and contain a large amount of toxic substances, which have caused a very serious burden on the ecological environment such as land and sea. Therefore, researchers began to turn their attention to bioplastics. Bioplastics use biomass as raw materials and do not depend on petroleum resources. With their two advantages of renewability and biodegradability, they have become the first choice for new plastics under the banner of low-carbon economy. Material. [0003] Starc...

AI Technical Summary

Problems solved by technology

However, the starch foaming material with water as the foaming system still has some defects, such as low foaming rate when the water content is low, and high water content is prone to foam rupture and uneven foaming, which will lead to starch foaming. The mechanical properties and cushioning performance of foam materials are reduced, which greatly limits their application in the field of transportation packaging

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