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Full-biodegradable straw reinforced starch material and preparation method thereof

A technology of starch materials and degradable materials, which is applied in the field of fully biodegradable straw-enhanced starch materials and its preparation, can solve problems such as environmental pollution, poor strength, and long plasticizing time, so as to reduce costs, solve processing problems, and improve production efficiency effect

Active Publication Date: 2021-09-24
上海经海纬象生物材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional biodegradable starch materials are prepared by blending starch as a filler with fossil-based polyolefin materials, but this type of material has certain disadvantages, because only starch can be degraded after being discarded, and polyolefin still cannot be degraded in a short time, thus causing greater damage. environmental pollution
Therefore, fully biodegradable starch materials have become the ultimate goal of industry development, but the currently developed fully biodegradable starch materials still have problems such as long plasticization time, relatively soft materials, and relatively poor strength.

Method used

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  • Full-biodegradable straw reinforced starch material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This example provides a method for preparing a fully biodegradable straw-enhanced starch material.

[0052] (1) 700g starch, 200g glycerin, 100g micron calcium carbonate (10μm), 100g polyvinyl alcohol (polymerization degree 1700), 150g polylactic acid (molecular weight 60000) and 100g straw nanofibers (diameter 20nm, length 1μm) Stir in a high-speed mixer at 20°C for 20 minutes and mix evenly to obtain a premixed material;

[0053] (2) Mix the premixed material in an internal mixer at 150°C for 30 minutes;

[0054] (3) After the mixing is completed, the mixed product obtained in step (2) is directly transported to a twin-screw extruder, and mixed, extruded, and granulated in the twin-screw extruder at 150 ° C to obtain a complete Biodegradable straw-enhanced starch material.

[0055] The performance test (test standard GB / T1040.2-2006) of the obtained fully biodegradable straw-enhanced starch material is performed, and the performance is shown in Table 1.

Embodiment 2

[0057] This example provides a method for preparing a fully biodegradable straw-enhanced starch material.

[0058] (1) 700g starch, 300g glycerol complex (200g glycerol + 100g epoxidized soybean oil), 70g micron calcium carbonate (20μm), 150g polycaprolactone (molecular weight 70000) and 200g straw nanofibers (diameter 30nm, length 10 μm) was stirred in a high-speed mixer at 20°C for 30 minutes and mixed evenly to obtain a premixed material;

[0059] (2) Mix the premixed material in an internal mixer at 120°C for 30 minutes;

[0060] (3) After the mixing is completed, the mixed product obtained in step (2) is directly transported to a twin-screw extruder, and mixed, extruded, and granulated in the twin-screw extruder at 130 ° C to obtain a complete Biodegradable straw-enhanced starch material.

[0061] The performance test (test standard GB / T1040.2-2006) of the obtained fully biodegradable straw-enhanced starch material is performed, and the performance is shown in Table 1. ...

Embodiment 3

[0063] This example provides a method for preparing a fully biodegradable straw-enhanced starch material.

[0064] (1) 700g starch, 300g glycerol complex (200g glycerol + 100g formamide), 50g nano-calcium carbonate (60nm), 250g polybutylene succinate (molecular weight 100000) and 100g straw nanofiber (diameter 20nm , with a length of 100 μm) was stirred in a high-speed mixer at 50°C for 20 minutes and mixed evenly to obtain a premixed material;

[0065] (2) Mix the premixed material in an internal mixer at 150°C for 10 minutes;

[0066] (3) After the mixing is completed, the mixed product obtained in step (2) is directly transported to the twin-screw extruder, and mixed, extruded, and granulated in the twin-screw extruder at 170 ° C to obtain a complete Biodegradable straw-enhanced starch material.

[0067] The performance test (test standard GB / T1040.2-2006) of the obtained fully biodegradable straw-enhanced starch material is performed, and the performance is shown in Tabl...

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Abstract

The invention discloses a full-biodegradable straw reinforced starch material and a preparation method thereof. The full-biodegradable straw reinforced starch material comprises the following components in percentage by mass: 40-70% of starch, 10-30% of a glycerol compound, 2-10% of calcium carbonate, 5-15% of straw nanofibers and 5-30% of a full-biodegradable material. Herein, starch is taken as a main raw material and is matched with the glycerol compound, the calcium carbonate, the straw nanofiber and the full-biodegradable material, so that the environmental pressure caused by straw treatment is relieved, and the mechanical strength of the full-biodegradable starch material is improved.

Description

technical field [0001] The application relates to the technical field of degradable materials, in particular to a fully biodegradable straw-enhanced starch material and a preparation method thereof. Background technique [0002] In recent years, with the concern of environmental pollution, the use of biodegradable materials has become one of the solutions to this problem. Biodegradable materials refer to materials that can be completely decomposed by microorganisms into low-molecular compounds such as carbon dioxide, water, and small organic molecules under natural environmental conditions within a certain period of time. The biodegradable starch material is a biodegradable product prepared by melting, blending and compatibilizing starch with other bio-polyesters after modification. It can replace polyolefin materials for packaging materials, toys and other products. , is a strategic emerging material for sustainable development. [0003] Traditional biodegradable starch m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L29/04C08L67/04C08L97/02C08L67/02C08K3/26C08K5/053
CPCC08L3/02C08K2003/265C08L2201/06C08L2205/16C08L29/04C08L67/04C08L97/02C08L67/02C08K3/26C08K5/053
Inventor 孙康乔秀颖李伟陈晓东周晓兵杨涛陶可钱俊
Owner 上海经海纬象生物材料有限公司
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