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A kind of starch/polyvinyl alcohol composite material and preparation method thereof

A technology of polyvinyl alcohol and composite materials, applied in the field of composite materials, to achieve the effects of improving safety, improving physical and mechanical properties, improving water resistance and physical properties

Inactive Publication Date: 2019-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] While effectively improving the water resistance and physical properties of the starch / PVA material, the technology of the present invention solves the problem of free aldehydes after cross-linking, and does not produce low-molecular free aldehydes harmful substances

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A starch / polyvinyl alcohol composite material, in parts by weight, comprises the following components:

[0048] Polyvinyl alcohol (PVA-2299 ) 50

[0049] Polyvinyl alcohol (PVA-0599 ) 50

[0050] Hydrogen peroxide (3wt% aqueous solution) 4

[0051] Ferrous sulfate (5wt% aqueous solution) 2

[0052] Tapioca Starch 100

[0053] Industrial grade dialdehyde starch 30

[0054] Glycerin 32

[0055] Ethylene glycol butyl ether 6

[0056] Diethanolamine 2

[0057] Industrial grade carbonamide 5

[0058] PEG-10000 1;

[0059] (1) After accurately weighing the above components, first add polyvinyl alcohol (PVA-2299 ) and polyvinyl alcohol (PVA-0599 ) to the high-speed mixer, turn on the low speed (200r / min) and add 5wt% ferrous sulfate aqueous solution Mix for 3 minutes; then start high-speed (1000 r / min) stirring and keep stirring at high speed for 5 minutes;

[0060] (2) Slowly add 3wt% hydrogen peroxide aqueous solution at high speed (1000 r / min), keep stirring at hi...

Embodiment 2

[0065] A starch / polyvinyl alcohol composite material, in parts by weight, comprises the following components:

[0066] Polyvinyl alcohol (PVA-1799 ) 100

[0067] Hydrogen peroxide (3wt% aqueous solution) 16

[0068] Ferrous sulfate (5wt% aqueous solution) 4

[0069] Cornstarch 300

[0070] Industrial grade dialdehyde starch 90

[0071] Ethylene glycol 80

[0072] Ethylene glycol methyl ether 15

[0073] Triethanolamine 5

[0074] Industrial grade carbonamide 10

[0075] PEG-1200 5;

[0076] (1) After accurately weighing the above components, first add polyvinyl alcohol (PVA-1799) to the high-speed mixer, turn on the low speed (200r / min), add 5wt% ferrous sulfate aqueous solution and mix for 3 minutes; then start the high speed ( 1000r / min) stirring, keep stirring at high speed for 5 minutes;

[0077] (2) Slowly add 3wt% hydrogen peroxide aqueous solution at high speed (1000r / min), keep stirring at high speed after adding, control the temperature of the material at 75°...

Embodiment 3

[0082] A starch / polyvinyl alcohol composite material, in parts by weight, comprises the following components:

[0083] Polyvinyl alcohol (PVA-2499 ) 40

[0084] Polyvinyl alcohol (PVA-0599 ) 60

[0085] Hydrogen peroxide (3wt% aqueous solution) 12

[0086] Ferrous sulfate (5wt% aqueous solution) 4

[0087] cornstarch 200

[0088] Industrial grade dialdehyde starch 60

[0089] Trimethylolpropane 48

[0090] Ethylene glycol methyl ether 9

[0091] Ethylenediamine 3

[0092] Industrial grade carbonamide 8

[0093] PEG-6000 3;

[0094] (1) After accurately weighing the above components, first add polyvinyl alcohol (PVA-2499 ) and polyvinyl alcohol (PVA-0599 ) to the high-speed mixer, turn on the low speed (200 r / min) and add 5wt% ferrous sulfate Mix the aqueous solution for 3 minutes; then start stirring at high speed (1000 r / min) and keep stirring at high speed for 5 minutes;

[0095] (2) Slowly add 3wt% hydrogen peroxide aqueous solution at high speed (1000 r / min), kee...

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Abstract

The invention discloses a starch / polyvinyl alcohol composite material and a preparation method thereof. The starch / polyvinyl alcohol composite material comprises the following components in parts by weight: 100 parts of polyvinyl alcohol, 6-20 parts of oxydol and ferrous sulfate, 100-300 parts of starch, 30-90 parts of dialdehyde starch, 40-100 parts of composite plasticizer, 5-10 parts of carbamide and 1-5 parts of processing aid. The preparation method comprises the following steps: mixing the raw materials in a high-speed stirrer, and carrying out extrusion granulation by a twin-screw extrusion granulator to obtain the starch / polyvinyl alcohol composite material. The water resistance and ambient high-humidity variation resistance of the starch / polyvinyl alcohol composite material can be greatly enhanced; and the mechanical properties can be enhanced by 30% or above.

Description

technical field [0001] The invention relates to composite materials, in particular to a starch / polyvinyl alcohol composite material and a preparation method thereof. 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] Polyvinyl alcohol (PVA) is a vinyl polymer that can be used by bacteria as a carbon source and energy source. It is a polymer material that can be biodegraded under the action of bacteria and enzymes, and it can be produced on a large scale by non-petroleum routes. polymer materials. Polyvinyl alcohol is not only cheap, but also has excellent physical properties. After being used, it is recognized as an environmentally friendly material because of its extremely low oxygen ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L29/04C08L3/04C08K5/053C08K5/06C08K5/17C08F16/06C08F8/30C08F8/06
CPCC08F8/30C08L3/02C08L2203/16C08L2205/02C08L2205/025C08L2205/035C08L2205/04C08F8/06C08F16/06C08L29/04C08L3/04C08K5/053C08K5/06C08K5/17
Inventor 崔跃飞周向阳谢斌
Owner SOUTH CHINA UNIV OF TECH