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Cured cross-linked glutinous rice flour hydrogel, preparation method and application thereof

A technology of hydrogel and sticky rice flour, applied in the direction of adhesives, etc., can solve problems such as difficult processing, and achieve the effect of low consumption, low cost and easy availability of raw materials

Active Publication Date: 2010-11-17
五莲县计量检测服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cross-linked products of starch have also been developed and applied for a long time, but they are all cross-linked and modified in the state of starch granules, and it is difficult to reprocess them into products with specific shapes, such as pharmaceutical preparations, membranes, tissue engineering materials, etc.

Method used

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  • Cured cross-linked glutinous rice flour hydrogel, preparation method and application thereof
  • Cured cross-linked glutinous rice flour hydrogel, preparation method and application thereof
  • Cured cross-linked glutinous rice flour hydrogel, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of maleated starch:

[0033] Prepare glutinous rice starch and water to make 40% starch emulsion, heat it to about 30°C, adjust the pH of the emulsion system to 8 with NaOH, then slowly add 50% maleic anhydride ethanol solution, the molar ratio of acid anhydride to starch glucose group is 0.5 : 1, the temperature is controlled at 35-40°C, and the reaction is about 10 hours, and the pH value of the system is adjusted to 10 from time to time. After the reaction, use 2% hydrochloric acid solution to adjust the pH value of the reaction system to 7.0, filter, wash 3 times with 70% ethanol, and dry in a vacuum oven at 50°C to obtain the finished maleated glutinous rice starch. The degree is 0.023, recorded as MN0.023.

[0034] By changing the molar ratio of maleic anhydride to starch glucose groups, such as 1:10, 10:1, and changing the esterification reaction temperature, maleated glutinous rice starch MN1.0, MN0.05, MN0.05, and MN0.0001 (degree of esterificatio...

Embodiment 2

[0044] For 40% waxy corn starch milk, use 1% NaOH to adjust the pH value to 9-10, add dropwise hydrogen peroxide with a mass fraction of 30% of the starch mass in a 50°C constant temperature water bath, and react for 4 hours after the dropwise addition. During the oxidation, the pH was adjusted to keep constant. After the reaction is completed, the obtained product is centrifuged, separated, washed and dried to obtain oxidized glutinous rice starch ON1.

Embodiment 3

[0046] Add 10g of small yellow rice starch and 40mL of water into a three-necked flask, stir evenly, adjust the pH to 3-4, raise the temperature to 60-65°C, add 0.4g of potassium permanganate and 0.6g of sulfuric acid in water (10ml), and react After 10 hours, the obtained product was centrifuged, separated, washed and dried to obtain oxidized glutinous rice starch ON2.

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Abstract

The invention relates to a cured cross-linked glutinous rice flour hydrogel, a preparation method and application thereof. The preparation method comprises the following steps: glutinous rice flour, a cross-linking agent and water are taken as raw materials, wherein, the cross-linking agent accounts for 0.01%-20% of the glutinous rice flour by mass; and in the presence of a pH regulator, the cured glutinous rice flour acts with the cross-linking agent. The glutinous rice flour is one or more mixtures of sticky rice, sticky corn, husked millet, big glutinous millet, small glutinous millet and sticky sorghum rice and starch and modified starch of the glutinous rice. The cured cross-linked glutinous rice flour hydrogel can be compatible with various matters, drugs of different types and the like, can be used for medical tablets, granules, capsules, gels, ointments, films, implanted preparations and patches as a slowly controlled release film for medicines, an auxiliary material for preparations, a water absorbing gel material and an adhesive material, and can be applied to water absorption, moisture preservation, cosmetics, tissue engineering cell culture, separation and purification, surgical operation, diaphragm and the like.

Description

technical field [0001] The invention relates to a cured cross-linked glutinous rice flour hydrogel and a preparation method and application thereof, which belong to environment-friendly water-absorbing cross-linked hydrogel products and technologies. Background technique [0002] Cross-linked polymer hydrogel is a kind of three-dimensional network structure material that can quickly absorb and retain a large amount of water but is insoluble in water. It is widely used in agriculture, forestry, animal husbandry, horticulture, Desert control, medical and health, biomedicine, construction, petrochemical, daily chemical, food, electronics and environmental protection and other fields, and continue to expand to broader fields. Polymer hydrogels are mainly divided into chemical cross-linking and physical cross-linking hydrogels, among which chemical cross-linking hydrogels are more, because of their high mechanical strength, strong water absorption and good structural stability, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L3/00C09J103/00
Inventor 董岸杰邓联东
Owner 五莲县计量检测服务中心
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