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Method for preparing biomass plastics by adopting green walnut skin

A technology of biomass plastic and green walnut skin, which is applied in the direction of raw material separation, etc., to achieve the effect of easy operation and reduction of environmental pollution

Inactive Publication Date: 2016-08-17
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of converting biomass into bioplastics, as a branch of new biorefining, is still in the research stage in the world, and there is no mature technology for converting green walnut skins into biomass plastics at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the present embodiment, the method for preparing biomass plastics by using green walnut skin comprises the following steps:

[0020] Step 1, the pretreatment of green walnut skin. The green walnut skin is air-dried naturally, and then the air-dried green walnut skin is cut into block particles with a particle size of 0.1-0.5 cm by a pulverizer. Then add ammonia water with a concentration lower than 10% to these lumpy particles to soften the green walnut skin and degrade the lignin therein without damaging the organic matter of the green walnut skin, which is helpful for the treatment of the subsequent steps.

[0021] Step 2, purification of organic matter. The pretreated green walnut skin still contains a lot of impurities that are not conducive to the production of biomass plastics, so the organic matter such as sugar and protein in the green walnut skin should be purified to remove harmful impurities. Add 0.5% Na to the pretreated green walnut peel particles 2 C...

Embodiment 2

[0025] In the present embodiment, the method for preparing biomass plastics by using green walnut skin comprises the following steps:

[0026] Step 1, the pretreatment of green walnut skin. Put the green walnut skin into the air explosion device, and carry out steam explosion treatment at 210°C, and the treatment time is 10-20min. Thereby destroying the plant structure in the green walnut skin and degrading lignin in large quantities.

[0027] Then, the pretreated green walnut skin was purified, denatured and dried by the same steps as Steps 2 to 4 of Example 1 to obtain biomass plastics.

[0028] In addition, the biomass plastic prepared from green walnut skin is rich in protein, amino acid and high polymer sugar, which is conducive to the reproduction of bacteria, so the biomass plastic may be mildewed and corrupted, which will affect its use as plastic. In particular, plastics used for packaging food need to meet higher safety and hygiene requirements. Therefore, in the ...

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PUM

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Abstract

The invention provides a method for preparing biomass plastics from green walnut husks. The method is characterized by comprising steps as follows: 1, a green walnut husk pretreatment step: the green walnut husks are naturally air-dried, the air-dried green walnut husks are cut into particles by a crusher, the grain size of each particle is 0.1-0.5 cm, one of an acidic chemical reagent and an alkali chemical reagent is added to the particles, filtering is performed after sufficient reaction, and pretreated green walnut husk particles are obtained; 2, an organic matter extraction step: an Na2CO3 solution with the concentration of 0.5% is added to the green walnut husk particles, the mixed solution is dialyzed by a plant membrane after sufficient reaction, and organic matters extracted from the green walnut husk particles are obtained; 3, an organic matter denaturing treatment step: the organic matters are added to hydrochloric acid and heated to 90-110 DEG C, the mixture is stirred simultaneously for 30 min, and a denatured organic aqueous solution is obtained; 4, a biomass plastic preparation step: the organic aqueous solution is heated to 240 DEG C, so that moisture is evaporated, and the biomass plastics are obtained.

Description

[0001] Technical solutions [0002] The invention relates to a method for preparing biomass plastics, in particular to a method for preparing biomass plastics by using green walnut peels from agricultural waste. Background technique [0003] Walnuts are popular in the world for their rich nutritional value and good brain-building effects. Together with almonds, cashews and hazelnuts, they are listed as the four largest nuts in the world. Walnut planting has a long history in my country. As early as the Western Han Dynasty, walnuts were introduced to China from the Western Regions by Zhang Qian. At present, the main production areas of walnuts in China are concentrated in Shanxi, Shaanxi, Gansu, Hebei, Sichuan and Yunnan, with a total planting area of ​​667,000 hectares and an annual output of 500,000 tons of dry walnuts. [0004] Green walnut skin is the remaining walnut skin and walnut pulp after the walnut has been removed from the core. During the planting and production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L89/00D21B1/36
Inventor 赵欣董庆利胡孟晗
Owner UNIV OF SHANGHAI FOR SCI & TECH