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Preparation method of hydroxyethyl cellulose/polyacrylic acid composite hydrogel

A technology of hydroxyethyl cellulose and composite hydrogel, which is applied in the field of preparation of hydroxyethyl cellulose/polyacrylic acid composite hydrogel to achieve the effects of low energy consumption, low price and reduced production cost

Inactive Publication Date: 2021-03-16
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this study, hydroxyethyl cellulose and acrylic acid were used as raw materials, N, N'-methylenebisacrylamide was used as crosslinking agent, and hydrogen peroxide and ascorbic acid solution were used as redox initiators to prepare hydroxyethyl cellulose by graft copolymerization. The study of ethyl cellulose / polyacrylic acid composite hydrogel has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A high-temperature-resistant asphalt waterproof membrane formula is: 100 parts of petroleum asphalt, 24 parts of naphthenic oil, 8 parts of EVA resin, 5 parts of polypropylene, 10 parts of waste rubber powder, and 92 parts of talcum powder.

[0024] Add asphalt and naphthenic oil into the reaction kettle, mix and stir, heat up to 190°C after melting, add modifier EVA resin, stir and keep warm for 0.5h, until the EVA resin is completely integrated into the asphalt system, add measured polypropylene, stir and keep warm for 1h , add waste rubber powder, stir and keep warm for 1h, add talcum powder, stir and keep warm for 1h, and then get modified asphalt. Subsequent steps such as impregnation, compound molding and curling are carried out on the tire base.

Embodiment 2

[0026] A high-temperature-resistant asphalt waterproof membrane formula is: 100 parts of petroleum asphalt, 24 parts of naphthenic oil, 8 parts of EVA resin, 9 parts of polypropylene, 10 parts of waste rubber powder, and 92 parts of talcum powder.

[0027] Add asphalt and naphthenic oil into the reaction kettle, mix and stir, heat up to 190°C after melting, add modifier EVA resin, stir and keep warm for 0.5h, until the EVA resin is completely integrated into the asphalt system, add measured polypropylene, stir and keep warm for 1h , add waste rubber powder, stir and keep warm for 1h, add talcum powder, stir and keep warm for 1h, and then get modified asphalt. Subsequent steps such as impregnation, compound molding and curling are carried out on the tire base.

Embodiment 3

[0029] A high-temperature-resistant asphalt waterproof membrane formula is: 100 parts of petroleum asphalt, 24 parts of naphthenic oil, 10 parts of EVA resin, 5 parts of polypropylene, 10 parts of waste rubber powder, and 92 parts of talcum powder.

[0030] Add asphalt and naphthenic oil into the reaction kettle, mix and stir, heat up to 190°C after melting, add modifier EVA resin, stir and keep warm for 0.5h, until the EVA resin is completely integrated into the asphalt system, add measured polypropylene, stir and keep warm for 1h , add waste rubber powder, stir and keep warm for 1h, add talcum powder, stir and keep warm for 1h, and then get modified asphalt. Subsequent impregnation and composite molding are carried out on the tire base.

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PUM

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Abstract

The invention relates to a preparation method of hydroxyethyl cellulose / polyacrylic acid composite hydrogel. The hydroxyethyl cellulose / polyacrylic acid composite hydrogel is prepared from the following raw materials: hydroxyethyl cellulose, acrylic acid, a cross-linking agent, a redox initiator, and deionized water. Firstly, the redox initiator is added into a hydroxyethyl cellulose solution to enable hydroxyl on hydroxyethyl cellulose to generate free radicals, then acrylic acid is added to enable hydroxyethyl cellulose and micromolecular acrylic acid to be subjected to graft copolymerization to form a high polymer, then a cross-linking agent is added, and the hydroxyethyl cellulose / polyacrylic acid composite hydrogel is prepared through the cross-linking effect of the cross-linking agent. The hydroxyethyl cellulose / polyacrylic acid composite hydrogel with excellent mechanical properties is prepared by controlling the material ratio of hydroxyethyl cellulose to acrylic acid, and theaddition amount, time, temperature and other factors of the redox initiator and the cross-linking agent.

Description

technical field [0001] The invention relates to a preparation method of hydroxyethyl cellulose / polyacrylic acid composite hydrogel. [0002] technical background [0003] Hydroxyethylcellulose (HEC) is a nonionic water-soluble cellulose derivative with excellent biocompatibility, low cytotoxicity and high mechanical properties, which can effectively improve the shortcomings of hydrogels with insufficient mechanical properties. [0004] Hydrogel is a flexible material with a three-dimensional network structure that can swell and absorb a large amount of water to fill in the network structure. As an efficient and green adsorbent, hydrogel has good reproducibility and reusability, so it has attracted much attention in the treatment of industrial wastewater. Because there are many different chelating functional groups in the network structure, such as amino, hydroxyl, amido, carboxyl and other active groups, they can remove heavy metal ions in wastewater through ion exchange, el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F220/06C08F222/38
CPCC08F251/02C08F220/06
Inventor 赵梓年王昆李征征
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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