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

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...

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.

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