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Method for preparing degradable foam by using walnut shell residues and corn starch

A technology of pecan shell and corn starch, which is applied in the field of material preparation and can solve problems such as environmental pollution

Inactive Publication Date: 2014-03-05
德清美联新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the utilization of lignin, some researchers have prepared degradable foamed plastics by using leftover lignin and cornstarch from papermaking. These solvents will cause environmental pollution. In addition, the lignin used here is too high in purity. High-purity lignin is a good fuel and can be used as a raw material for the preparation of high-value phenols. Therefore, look for Inexpensive substitute for lignin makes a lot of sense

Method used

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  • Method for preparing degradable foam by using walnut shell residues and corn starch
  • Method for preparing degradable foam by using walnut shell residues and corn starch
  • Method for preparing degradable foam by using walnut shell residues and corn starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The hickory shell residue, cornstarch (dry weight), water (add water and water in starch), magnesium stearate are mixed in a magnetic stirrer according to the mass percentage of 3%, 50%, 49%, and 1%. Treat it in a 70-degree water bath until it becomes a doughnut-like shape. Then move the dough cake into the mold and process it in a tablet press at 170 degrees for 3 minutes. Degradable foam can be obtained after cooling, see figure 1 The first biodegradable foam in .

Embodiment 2

[0016] The hickory shell residue, cornstarch (dry weight), water (add water and water in starch), magnesium stearate are mixed in a magnetic stirrer according to the mass percentage of 10%, 30%, 55%, and 5%. Treat it in a 70-degree water bath until it becomes a doughnut-like shape. Then move the dough cake into the mold and process it in a tablet press at 170 degrees for 5 minutes. The degradable foam can be obtained after cooling.

Embodiment 3

[0018] The hickory shell residue, cornstarch (dry weight), water (add water and water in starch), magnesium stearate are mixed in a magnetic stirrer according to the mass percentage of 9%, 30%, 60%, and 1%. Treat it in a water bath at 74 degrees until it becomes a doughnut. The dough cake is then moved into a mold and processed in a tablet press at 200 degrees for 3 minutes. The degradable foam can be obtained after cooling.

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Abstract

The invention relates to a method for preparing degradable foam by using walnut shell residues and corn starch. The degradable foam is tableted and molded at the temperature of 170-220 DEG C by taking walnut shell residues and corn starch pretreated with subcritical water as foam raw materials, taking water as a solvent and taking magnesium stearate as a buffering agent. The degradable foam has natural decomposability, and plays a role in effectively relieving increasingly deteriorating white pollution; and the corn starch has very high plasticity, can be molded by using different molds, and can be applied to disposable lunch boxes for short-term use, buffering cushions, certain flower pot containers and the like.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and relates to a method for preparing degradable foam by using pecan shell residue and cornstarch. Background technique [0002] The use of subcritical water resources to utilize agricultural waste has a certain degree of advancement. Subcritical water is water that remains liquid at high temperatures (100-374 degrees) through pressurization. Compared with water at normal temperature, it has special properties such as high ion product and low specific dielectric constant, which indicates that subcritical water can be used as an acidic catalyst or as an organic solvent. At present, more and more studies are devoted to using subcritical water to extract reducing sugars and phenols from agricultural waste. However, after agricultural waste is treated by subcritical water, there are still many residual wastes left. Residues have not been well utilized, so it is of great significanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L97/02C08K5/098
Inventor 吴圣姬周洁谢正苗
Owner 德清美联新材料科技有限公司