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Hydrolysable natural high-toughness water absorbing material and preparation method thereof

A water-absorbing material and high-toughness technology, applied in the field of water-absorbing materials and preparation, can solve the problems of fast water absorption rate, long preparation time, poor salt resistance of ionic high water-absorbing materials, etc. The preparation method is simple and convenient, and the effect of promoting the water absorption effect

Inactive Publication Date: 2018-03-06
赵思嘉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the research of most superabsorbent materials: (1) the salt tolerance of ionic superabsorbent materials is not good; Good, but its water absorption performance is poor
This will consume a large amount of alkali and compressed inert gas, and higher power consumption (especially in large quantities and high-viscosity polymer systems), will directly lead to increased production costs, excessive alkali content in emissions, and increased environmental pollution.
It is precisely because of the above reasons that many excellent processes in the experimental stage cannot be scaled up for pilot test, small batch production and industrialization.
CN103819615B discloses a water-absorbing material mainly made of starch, acrylic acid, and sodium hydroxide. The manufacturing process is complicated, and the water-absorbing material is easily broken and inconvenient to store
CN102382264A discloses a preparation method of cellulose water-absorbing material, the process cost is high, the preparation time is long, and it is not suitable for large-scale production
Generally speaking, the water-absorbing materials made of natural materials have insufficient toughness, are easy to break and produce debris, need to add a large amount of chemical crosslinking agent for reinforcement, and at the same time, the production cost is too high.

Method used

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  • Hydrolysable natural high-toughness water absorbing material and preparation method thereof
  • Hydrolysable natural high-toughness water absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] According to the formula in the table below, weigh the weight of each raw material. And prepare product examples 1-5 and comparative examples 1-7 according to the following steps.

[0028] (1) Add acrylic acid and starch in proportion to aqueous sodium hydroxide solution, mix well and pregelatinize at 70°C for 3-5 minutes to obtain component A;

[0029] (2) Cool down to 40°C, add component B oxidized short cellulose fibers with a length of 50-100 mm to component A, mix evenly in a mixer and add component C;

[0030] (3) Heat up to 70°C in a closed environment, knead for 1 hour, take out slices, dry and pulverize to obtain the product.

[0031]

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Abstract

The invention provides a hydrolysable natural high-toughness water absorbing material. By using starch and oxidized natural cellulose as main raw materials and adding additives such as acrylic acid for modification, soda powder and the like, the prepared water absorbing material is natural and easy to decompose, maintains a certain high toughness, is not easy to crush and generate chips. The hydrolysable natural high-toughness water absorbing material provided by the invention is characterized in that the water absorbing material contains a reaction component A: starch, acrylic acid, sodium hydroxide and water; a component B: oxidized natural cellulose fiber; a component C: soda powder, silica-gel powder and talcum powder; the molar ratio of acrylic acid to sodium hydroxide is 1:0.1-0.3; the mass ratio of starch to oxidized natural cellulose is 1:0.2-0.5; the mass ratio of starch to soda powder is 1:0.01-0.05; and the oxidized natural cellulose fiber is obtained after activation and mild oxidation of cellulose fiber of 20-40 mm long.

Description

technical field [0001] The invention relates to a hydrolyzable natural high-toughness water-absorbing material and a preparation method. Background technique [0002] At present, the demand for superabsorbent materials in the market is increasing, because it has a wide range of applications in various fields such as personal hygiene products, industrial and agricultural production, and civil engineering. However, there are some problems in the research of most superabsorbent materials: (1) the salt tolerance of ionic superabsorbent materials is not good; Good, but its water absorption performance is poor. In various practical applications, the water-absorbing agent is often required to have certain salt resistance and gel strength. Therefore, there is a need to develop a high-performance water-absorbing material in the market. High-performance water-absorbing materials not only have excellent water absorption and water retention properties, but also have fast water absorp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/02C08L1/04C08F251/00C08F220/06C08J9/08C08F2/44
CPCC08F251/00C08F2/44C08J9/08C08J2203/02C08J2207/10C08J2351/02C08J2401/04C08L51/02C08L2201/06C08L2203/14C08L2205/16C08F220/06C08L1/04
Inventor 赵思嘉
Owner 赵思嘉
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