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Toughening and waterproof starch plastic and preparation method thereof

A technology of starch plastics and water resistance, which is applied in the field of polylactic acid/thermoplastic starch/thermoplastic polyurethane blended starch plastics and its preparation, which can solve the problems of unsuitability for large-scale industrial production, easy migration of polyethylene glycol, and complicated starch treatment process and other issues, to achieve the effect of improving material toughness and water resistance, reducing material cost, and low cost

Inactive Publication Date: 2014-08-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, there are many invention patents on the toughening of polylactic acid / starch degradable materials in my country, but most of them have poor toughening effects or complicated preparation processes. For example, Chinese patent CN103159984A discloses a polylactic acid toughened by polyvinyl alcohol. / thermoplastic starch blend material, high impact strength, but the starch treatment process is complex, not suitable for large-scale industrial production; Chinese patent CN101948613A discloses a polylactic acid / starch modified with polyethylene glycol and maleic anhydride Composite system, but polyethylene glycol in this composite system is prone to migration, resulting in poor mechanical properties

Method used

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  • Toughening and waterproof starch plastic and preparation method thereof
  • Toughening and waterproof starch plastic and preparation method thereof
  • Toughening and waterproof starch plastic and preparation method thereof

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Embodiment 1

[0026] In this embodiment, the formula component of toughened water-resistant starch plastic weight percent of the present invention is as follows:

[0027] Starch 4% (produced by Gansu Shengdafangzhou Potato Modified Starch Co., Ltd., industrial grade, cassava starch), polylactic acid 87% (produced by Natureworks in the United States, brand: 2003D), thermoplastic polyurethane 7% (produced in Dadong, Taiwan, polyester type, Shore hardness is 65A), glycerin 1.5% (produced by Shanghai Shenbo Chemical Co., Ltd., analytically pure), antioxidant 0.5% (Jiangsu Feixiang Chemical Binhai Co., Ltd., model: 1010)

[0028] The preparation method of the above-mentioned toughened water-resistant starch plastic is as follows:

[0029] (1) Dry starch, polylactic acid, and thermoplastic polyurethane at 80°C for 6 hours, and then accurately weigh each component according to the above-mentioned formula for toughening water-resistant starch plastic;

[0030] (2) Put starch and glycerin in propor...

Embodiment 2

[0033] In this embodiment, the formula component of toughened water-resistant starch plastic weight percent of the present invention is as follows:

[0034] Starch 20% (produced by Gansu Shengda Fangzhou Potato Modified Starch Co., Ltd., industrial grade, cassava starch), polylactic acid 58.5% (produced by Natureworks in the United States, brand: 2003D), thermoplastic polyurethane 15% (produced in Dadong, Taiwan, polyester type, Shore hardness is 65A), glycerin 6% (produced by Shanghai Shenbo Chemical Co., Ltd., analytically pure), antioxidant 0.5% (Jiangsu Feixiang Chemical Binhai Co., Ltd., model: 1010)

[0035] The preparation method of the above-mentioned toughened water-resistant starch plastic is as follows:

[0036] (1) Dry starch, polylactic acid, and thermoplastic polyurethane at 80°C for 6 hours, and then accurately weigh each component according to the above-mentioned formula for toughening water-resistant starch plastic;

[0037] (2) Put starch and glycerin in pro...

Embodiment 3

[0040] In this embodiment, the formula component of toughened water-resistant starch plastic weight percent of the present invention is as follows:

[0041] Starch 29% (produced by Gansu Shengdafangzhou Potato Modified Starch Co., Ltd., industrial grade, cassava starch), polylactic acid 40.5% (produced by Natureworks in the United States, brand: 2003D), thermoplastic polyurethane 20% (produced by Dadong, Taiwan, polyester type, Shore hardness is 65A), glycerin 10% (produced by Shanghai Shenbo Chemical Co., Ltd., analytically pure), antioxidant 0.5% (Jiangsu Feixiang Chemical Binhai Co., Ltd., model: 1010)

[0042] The preparation method of the above-mentioned toughened water-resistant starch plastic is as follows:

[0043] (1) Dry starch, polylactic acid, and thermoplastic polyurethane at 80°C for 6 hours, and then accurately weigh each component according to the above-mentioned formula for toughening water-resistant starch plastic;

[0044] (2) Put starch and glycerin in pro...

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Abstract

The invention relates to a toughening and waterproof starch plastic and a preparation method thereof. A formula of the toughening and waterproof starch plastic comprises 1-47% of starch, 0.2-24% of plasticizer, 24-93% of polylactic acid, 5-40% of thermoplastic polyurethane and 0.1-4% of antioxidant. The toughening and waterproof starch plastic is prepared by the preparation method comprising the following steps: mixing starch and plasticizer according to a proportion, mixing for 3 minutes in a high-speed mixer, extruding with a double-screw extruder, cooling the product and pulverizing to obtain thermoplastic starch; and mixing the thermoplastic starch, polylactic acid, thermoplastic polyurethane and antioxidant according to a proportion, and kneading for 10-15 minutes in a kneading machine till the materials are mixed uniformly, thus obtaining the toughening and waterproof starch plastic. The toughening and waterproof starch plastic has the advantages of simple preparation process, good toughness, good water resistance, low cost, degradability, environmental friendliness in the production process and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polylactic acid / thermoplastic starch / thermoplastic polyurethane blended starch plastic with simple preparation process, low cost, good toughness, good water resistance and degradability and a preparation method thereof. Background technique [0002] Polymer materials play an important role in various fields and promote the rapid development of science and technology and industrial and agricultural production. At the same time, their large-scale use also brings a series of problems. At present, the annual output of global polymer materials has exceeded 200 million tons, of which the discarded polymer materials are about 50 million tons per year, most of which are difficult to decompose in the natural environment, causing serious pollution; for a long time, plastic waste The main treatment methods are landfill, incineration and recycling, which not only need to occupy a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L3/02C08L75/06
Inventor 汪济奎刘延昌郭卫红赵聪杨昆王文琪司鹏翔蔡婉萍
Owner EAST CHINA UNIV OF SCI & TECH
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