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Polyaspartic acid composite hydrogel and preparation method thereof

A technology of composite hydrogel and polyaspartic acid, applied in the field of polyaspartic acid composite hydrogel and its preparation, can solve the problem of expensive polysuccinimide and high cost of polyaspartic acid hydrogel question

Active Publication Date: 2016-05-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing polyaspartic acid hydrogels are all made from polysuccinimide through cross-linking reaction, because the raw material polysuccinimide is relatively expensive, resulting in the cost of polyaspartic acid hydrogels High, which limits the application of this product, especially the application of sand fixation and agricultural water conservation and seedling cultivation

Method used

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  • Polyaspartic acid composite hydrogel and preparation method thereof
  • Polyaspartic acid composite hydrogel and preparation method thereof
  • Polyaspartic acid composite hydrogel and preparation method thereof

Examples

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Embodiment 1

[0051] Example 1: Preparation of polyaspartic acid composite hydrogel.

[0052] (1) Mixing the biomass raw material suspension with the polyaspartic acid polymer aqueous solution to prepare a biomass raw material-polyaspartic acid mixture.

[0053] Add 6g of polyaspartic acid with a molecular weight of 50,000Da in a reactor with a stirring device, and mix it in deionized water until the concentration of the polyaspartic acid aqueous solution is 2mol / l; in a reactor with a stirring device Add soybean meal according to the mass ratio of soybean meal and polyaspartic acid as 1:5, then add deionized water and mix until the concentration of soybean meal suspension is 33.3g / L. The above polyaspartic acid aqueous solution and the soybean meal suspension are mixed to form a soybean meal-polyaspartic acid mixture, and after being fully stirred, the pH value of the solution is adjusted to 4.8 with phosphoric acid.

[0054] (2) Adding a cross-linking agent to the biomass raw material-po...

Embodiment 2

[0060] The difference between embodiment 2 and embodiment 1 is that the mass ratio of soybean meal and polyaspartic acid is 1:2.5, other conditions are all the same as embodiment 1, and under the same measurement conditions as embodiment 1, the tea bag method is used to measure The water absorption rate of the obtained polyaspartic acid composite hydrogel in 0.9% physiological saline is 225g / g; the elastic modulus G' of the hydrogel measured by a rheometer is 2857Pa.

Embodiment 3

[0062] The difference between embodiment 3 and embodiment 1 is that the mass ratio of soybean meal to polyaspartic acid is 1:2, all the other conditions are the same as in embodiment 1, and under the same measurement conditions as in embodiment 1, the tea bag method is used to measure The water absorption rate of the obtained polyaspartic acid composite hydrogel in 0.9% physiological saline is 218g / g, and the elastic modulus G' of the hydrogel measured by a rheometer is 2934Pa.

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Abstract

The invention relates to a polyaspartic acid composite hydrogel and a preparation method thereof. The preparation method includes: using an epoxy matter as a cross-linking agent to subject polyaspartic acid or its derivative and a biomass material to cross-linking reaction; the prepared polyaspartic acid composite hydrogel contains low-price biomass material in molecules, has high water absorption rate and gel strength and low production cost, is free of environmental pollution, is easy to industrially produce and has promising application prospect.

Description

technical field [0001] The invention belongs to the technical field of polymer hydrogel preparation, and relates to a polyaspartic acid composite hydrogel and a preparation method thereof. Background technique [0002] Superabsorbent hydrogel is a polymer that can absorb water dozens or even thousands of times its own weight. Polyaspartic acid hydrogel is a polymer with polyaspartic acid as the skeleton, which forms a network structure through cross-linking. It has high water absorption performance, good biodegradability and biocompatibility. At present, it is widely used in important fields such as health care products, sand-fixing agents, agricultural water-retaining agents, wastewater treatment, and controlled release of chemicals. [0003] Existing polyaspartic acid hydrogels are all made from polysuccinimide through cross-linking reaction, because the raw material polysuccinimide is relatively expensive, resulting in the cost of polyaspartic acid hydrogels High, there...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L79/08C08L89/00C08L97/00C08L1/02
CPCC08J3/075C08J3/246C08J2379/08C08L79/08C08L89/00C08L97/00C08L1/02
Inventor 谭天伟罗楠曹辉王扬史璐皎韦依
Owner BEIJING UNIV OF CHEM TECH
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