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Starch-based composite and preparation method thereof

A composite material, starch-based technology, applied in the field of starch, can solve the problems that the material properties are difficult to stabilize, cannot solve the problems of strong hydrophilicity and water resistance, and achieves the effects of low cost, easy industrial production and good resilience.

Active Publication Date: 2015-09-09
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method partially solves the thermoplastic and dispersion problems of the material, since the small molecule plasticizer is easy to migrate, the performance of the material deteriorates rapidly after migration, and the water resistance of the material will drop sharply due to the addition of the plasticizer. , so the performance of the material is difficult to stabilize
[0006] The starch-based biomaterials at this stage cannot solve the balance of the three problems of strong hydrophilicity, mechanical properties and plasticizer migration, so it is difficult to apply on a large scale

Method used

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  • Starch-based composite and preparation method thereof
  • Starch-based composite and preparation method thereof
  • Starch-based composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix 100 parts of modified starch 1 with 10 parts of polycaprolactone (PCL) (manufactured by Shenzhen Guanghua Weiye Co., Ltd.), and place the premix in a torque rheometer (RM-200 manufactured by Harper Co., Ltd.) , blending at 50 rpm for 10 min at 70°C.

[0060] The blend was hot-pressed by a flat vulcanizer to obtain a sheet with a thickness of 1 mm, and was cut into a standard sample according to relevant standards for mechanical performance testing. The test results were listed in Table 1. Water absorption, the test results are listed in Table 1.

Embodiment 2

[0062] Mix 100 parts of modified starch 2 with 10 parts of polycaprolactone (PCL) (manufactured by Shenzhen Guanghua Weiye Co., Ltd.), and place the premix in a torque rheometer (RM-200 manufactured by Harper Co., Ltd.) , blending at 50 rpm for 10 min at 70°C.

[0063] The blend was hot-pressed by a flat vulcanizer to obtain a sheet with a thickness of 1 mm, and was cut into a standard sample according to relevant standards for mechanical performance testing. The test results were listed in Table 1. Water absorption, the test results are listed in Table 1.

Embodiment 3

[0065] Mix 100 parts of modified starch 3 with 30 parts of polybutylene adipate / terephthalate (PBAT) (produced by Shenzhen Guanghua Weiye Co., Ltd.), and place the premix in a torque rheometer (Haber Co., Ltd. In the RM-200 type prepared by the company), blending at 50 rpm for 10 minutes at 70°C.

[0066] The blend was hot-pressed by a flat vulcanizer to obtain a sheet with a thickness of 1 mm, and was cut into a standard sample according to relevant standards for mechanical performance testing. The test results were listed in Table 1. Water absorption, the test results are listed in Table 1.

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Abstract

The invention discloses starch-based composite and a preparation method thereof. The composite is formed by, by weight, 100 parts of modified starch and 10-100 parts of polyester through melt blending. The structural formula of the modified starch is showed in the description and claims, wherein St refers to starch molecules and R group is alkyl group (CnH2n+1). Esterified starch comprises, by weight, 100 parts of natural starch, 0-200 parts of solvent, 10-50 parts of catalyst and 1-50 parts of modifier. The preparation method includes melt blending the components according to the weight to obtain the starch-based composite. The preparation method is high in efficiency, low in cost, simple in process, controllable in performance, and suitable for preparing thermoplastic materials with various performance requirements.

Description

technical field [0001] The invention relates to the technical field of starch, and more specifically, relates to a starch-based composite material and a preparation method. Background technique [0002] China is a large grain country. Every year, excluding food consumption and industrial grain, there are still hundreds of thousands of tons of grain accumulated. According to the national food hygiene standards, grain stored for more than one year is old grain, and grain for more than three years is old grain. These grains can neither be eaten by humans nor can be used as feed, thus causing a lot of waste. At the same time, some crops such as cassava and kudzu root are usually used in low-value and high-pollution industrial production such as papermaking and mortar due to their low nutritional value. As a natural polymer, starch is renewable, degradable, cheap, easy to store and easy to transport. If the starch in old grains and low-nutrition and low-value crops can be used i...

Claims

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Application Information

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IPC IPC(8): C08L3/06C08L51/02C08L67/00C08F251/00C08B31/02
Inventor 东为富孙钰杰陈明清马丕明倪忠斌
Owner JIANGNAN UNIV
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