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Easily degradable starch-based material as well as preparation method and application thereof

A starch-based, easily degradable technology, applied in the field of easily degradable starch-based materials, can solve problems such as human hazards, achieve the effects of reducing pollution, excellent water vapor barrier properties, and improving antibacterial performance

Inactive Publication Date: 2020-09-18
嘉兴市爵拓科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the packaging material prepared based on this invention may cause harm to the human body

Method used

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  • Easily degradable starch-based material as well as preparation method and application thereof
  • Easily degradable starch-based material as well as preparation method and application thereof
  • Easily degradable starch-based material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Embodiment 1: A kind of easily degradable starch-based material:

[0085] This embodiment provides a kind of easily degradable starch-based material, the mass fraction of raw materials is as follows:

[0086]

[0087] The above-mentioned modified starch is that corn starch is modified by sodium alginate of 1 / 4 weight of corn starch, and the weight average molecular weight M of the sodium alginate is w =245000, and the dispersion index PI=1.8.

[0088] The above-mentioned easily degradable starch-based material is prepared through a method comprising the following steps:

[0089] 1. Preparation of modified starch:

[0090] 1.1. Weigh 100g of cornstarch and 25g of sodium alginate into 350g of distilled water, add 8.0g of sodium sulfate, and adjust the pH of the system to 10.0 with saturated sodium hydroxide solution;

[0091] 1.2 Add 1.0mL cross-linking agent POCl dropwise in batches under stirring at 180r / min 3 , first add 0.2mL dropwise, then add 0.2mL dropwise a...

Embodiment 2

[0105] Example 2: Another readily degradable starch-based material:

[0106] This embodiment provides another easily degradable starch-based material, its components, proportioning and preparation method are basically the same as in Example 1, the only difference is that no modified lignin is added to the components of this embodiment, and its lack The provincial share is made up by modified starch.

Embodiment 3

[0107] Example 3: Another readily degradable starch-based material:

[0108] This example provides another easily degradable starch-based material, its components, proportions and preparation methods are basically the same as in Example 1, the only difference is that no carbon quantum dot composite titanium dioxide is added to the components of this example, its The default share is made up by modified starch.

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Abstract

The invention relates to the technical field of degradable material manufacturing, in particular to an easily-degradable starch-based material. The easily-degradable starch-based material comprises following raw materials: modified starch, modified lignin, carbon quantum dot composite titanium dioxide, polyethylene glycol and glycerol; wherein the modified starch is obtained by modifying corn starch with sodium alginate, sodium alginate accounts for 20 to 32% of the weight of the corn starch, the weight-average molecular weight (Mw) of sodium alginate is less than or equal to 300,000, and thepolydispersity index (PI) of sodium alginate is 1.2-2.0. The material is prepared from agricultural products, the cost is reduced, the use amount of non-degradable materials is reduced, the environmental friendliness and the sustainability of the material are improved, the material has advantages of excellent tensile strength, excellent elongation at break, excellent impact strength and excellentwater vapor barrier property, and a finished product is water impermeable, thermal-insulating and moisture-proof, and can be rapidly degraded on the ground and underground.

Description

technical field [0001] The invention relates to the technical field of degradable material manufacturing, in particular to an easily degradable starch-based material, its preparation method and its application. Background technique [0002] The so-called "white pollution" refers to the pollution of the environment by non-degradable plastic waste that can be seen at any time in urban and rural garbage or scattered everywhere. It mainly includes plastic bags, plastic packaging, disposable polypropylene fast food boxes, plastic tableware cups and plates, electrical filling foam stuffing, plastic beverage bottles, yogurt cups, ice cream skins, etc. The environmental pollution caused by plastic bags and disposable plastic products has become a large-scale environmental pollution problem. It takes decades or hundreds of years for plastic products to degrade when they are buried in the soil. Burning plastic bags in a centralized manner can easily cause air pollution and harm the bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L87/00C08L97/00C08L71/02C08K3/04C08K3/22C08K5/053C08G81/00C08H7/00
CPCC08G81/00C08H6/00C08K2003/2241C08K2201/011C08L87/005C08L2201/06C08L2201/14C08L2203/16C08L2205/03C08L97/005C08L71/02C08K3/04C08K3/22C08K5/053
Inventor 不公告发明人
Owner 嘉兴市爵拓科技有限公司
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