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Starch-based material with cold water soluble characteristic and preparation and application thereof

A starch-based, water-soluble technology, applied in the field of starch-based materials and their preparation, can solve the problems of insolubility, poor arrangement tightness and poor water solubility, and achieve the effects of improving compatibility, improving water-solubility, and increasing plasticizing efficiency.

Active Publication Date: 2019-01-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the high crystallinity and tight arrangement of native starch also lead to its poor water solubility, or even insoluble in water.

Method used

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  • Starch-based material with cold water soluble characteristic and preparation and application thereof
  • Starch-based material with cold water soluble characteristic and preparation and application thereof
  • Starch-based material with cold water soluble characteristic and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A starch-based material with cold water soluble properties, in parts by weight, comprising the following components:

[0048]

[0049] (1) Weigh the components according to the parts by weight, add the modified starch, polyvinyl alcohol and processing aid PEG-6000 to the high-speed mixer, start the low-speed stirring, add and mix, and then start the high-speed stirring;

[0050] (2) Under high-speed stirring, slowly add compound plasticizer and pullulan, and keep stirring at high speed after adding; then switch to low speed, and add the remaining components: cross-linked starch; continue to start high-speed after adding all the components Stir, cool down and discharge the material, enter the twin-screw extrusion granulator for extrusion and granulation, and obtain the starch-based material with cold water soluble properties.

[0051] Further, in step (1), the mixing time is 3 minutes.

[0052] Further, in step (1), the time of the high-speed stirring is 5 minutes. ...

Embodiment 2

[0062] A starch-based material with cold water soluble properties, in parts by weight, comprising the following components:

[0063]

[0064] (1) Weigh the components according to the parts by weight, add the modified starch, polyvinyl alcohol and processing aid PEG-2000 to the high-speed mixer, start the low-speed stirring, add and mix, and then start the high-speed stirring;

[0065] (2) Under high-speed stirring, slowly add compound plasticizer and pullulan, and keep stirring at high speed after adding; then switch to low speed, and add the remaining components: cross-linked starch; continue to start high-speed after adding all the components Stir, cool down and discharge the material, enter the twin-screw extrusion granulator for extrusion and granulation, and obtain the starch-based material with cold water soluble properties.

[0066] Further, in step (1), the mixing time is 3 minutes.

[0067] Further, in step (1), the time of the high-speed stirring is 5 minutes. ...

Embodiment 3

[0076] A starch-based material with cold water soluble properties, in parts by weight, comprising the following components:

[0077]

[0078]

[0079] (1) Weigh the components according to the parts by weight, add the modified starch, polyvinyl alcohol and processing aid PEG-4000 to the high-speed mixer, start the low-speed stirring, add and mix, and then start the high-speed stirring;

[0080] (2) Under high-speed stirring, slowly add compound plasticizer and pullulan, and keep stirring at high speed after adding; then switch to low speed, and add the remaining components: cross-linked starch; continue to start high-speed after adding all the components Stir, cool down and discharge the material, enter the twin-screw extrusion granulator for extrusion and granulation, and obtain the starch-based material with cold water soluble properties.

[0081] Further, in step (1), the mixing time is 3 minutes.

[0082] Further, in step (1), the time of the high-speed stirring is ...

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Abstract

The invention discloses a starch-based material with a cold water soluble characteristic and a preparation method thereof. The material comprises the following components in parts by weight: 100 of modified starch; 48 to 65 of PVA (Polyvinyl Alcohol), 22 to 50 of a composite plasticizer, 3 to 10 of pullulan, 5 to 10 of crosslinked starch and 1 to 3 of a processing aid. According to the invention,the composite efficient plasticizer is used for carrying out plasticization on a preparation system of the starch-based material, an amides modified water soluble polyatomic alcohol derivative is usedas one of composite plasticizers, the additive amount of the conventional plasticizer can be increased to 20% or more, and the plasticizer cannot be separated out, so that plasticization efficiency for starch and PVA is greatly improved; and meanwhile, water solubility of the starch and PVC composite material can also be improved, and the thermoplastic starch-based material which can be stably processed and has the cold water soluble characteristic is prepared. After the material prepared by the preparation method is subjected to extrusion blow molding to form a film, completely dissolved time of the thin film (20 to 50 mum) formed by the material in cold water (23 DEG C) is smaller than or equal to 180s.

Description

technical field [0001] The invention belongs to the fields of environmental friendliness, recycling resource utilization and composite material preparation, and in particular relates to a starch-based material with cold-water soluble properties and its preparation method and application. Background technique [0002] As a natural polymer raw material, starch has low price, wide and abundant sources, and it is also an inexhaustible renewable resource. With the continuous consumption of non-renewable petroleum resources, the development and utilization of renewable resources has great social and economic significance. [0003] Native starch is difficult to process due to its high degree of crystallization and tight arrangement between molecules, and its water solubility is also poor. To prepare starch-based materials with water-soluble properties, it is necessary to modify the original starch to reduce the crystallinity and close arrangement of molecules, and at the same time...

Claims

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Application Information

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IPC IPC(8): C08L3/04C08L3/06C08L3/08C08L3/10C08L29/04C08L5/00C08L71/02
CPCC08L3/04C08L3/06C08L3/08C08L3/10C08L2201/06C08L2203/16C08L2205/025C08L2205/035C08L29/04C08L5/00C08L71/02
Inventor 崔跃飞
Owner SOUTH CHINA UNIV OF TECH
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