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Porous hydrogel and preparation method thereof

A technology of porous hydrogel and hydroxypropyl cellulose, which is applied in the field of chemical material processing, can solve environmental pollution and other problems, and achieve good mechanical strength, good anti-fouling effect, and simple operation

Inactive Publication Date: 2014-04-16
苏潮宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201210127397.1 discloses a preparation method of porous hydrogel. The preparation process includes steps such as physical freezing and thawing, hydrochloric acid elution and removal, etc. Hydrochloric acid is used in the process, which pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of porous hydrogel, the parts by weight of each component are:

[0024] 55 parts of hydroxypropyl cellulose, 15 parts of sodium alginate, 3 parts of sodium chloride, and 15 parts of methacrylic acid.

[0025] Its preparation method comprises the following steps:

[0026] Weigh the above substances and dissolve them in deionized water according to the above ratio to make a solution with a mass fraction of 10%. After stirring for 3 hours, let it stand until the bubbles of the solution disappear, and then place it in an environment of ~-80°C to freeze it quickly. Drying in vacuum under the condition of -0.25MPa, the porous hydrogel is obtained.

Embodiment 2

[0028] A kind of porous hydrogel, the parts by weight of each component are:

[0029] 45 parts of hydroxypropyl cellulose, 10 parts of sodium alginate, 3 parts of sodium chloride, and 13 parts of methacrylic acid.

[0030] Its preparation method comprises the following steps:

[0031] Weigh the above substances and dissolve them in deionized water according to the above ratio to make a solution with a mass fraction of 5%. After stirring for 3 hours, let it stand until the bubbles of the solution disappear, and then place it in an environment of -80°C to freeze it quickly. Vacuum drying under the condition of -0.25MPa, the porous hydrogel is obtained.

Embodiment 3

[0033] A kind of porous hydrogel, the parts by weight of each component are:

[0034] 30 parts of hydroxypropyl cellulose, 20 parts of sodium alginate, 2 parts of sodium chloride, and 10 parts of methacrylic acid.

[0035] Its preparation method comprises the following steps:

[0036] Weigh the above substances and dissolve them in deionized water according to the above ratio to form a solution with a mass fraction of 5%. After stirring for 2 hours, let it stand until the solution bubbles disappear, and then place it in an environment of -80°C to freeze it quickly. Vacuum drying under the condition of -0.25MPa, the porous hydrogel is obtained.

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Abstract

The invention relates to porous hydrogel and a preparation method thereof and belongs to the technical field of chemical material processing, wherein the porous hydrogel comprises the following components in parts by weight: 30 to 60 parts of hydroxy propyl cellulose, 10 to 20 parts of sodium alginate, 1 to 3 parts of sodium chloride, and 10 to 15 parts of methacrylic acid. The preparation method provided by the invention comprises the following steps: weighting the matters and dissolving into a deionized water according to certain proportion so as to prepare a solution with mass fraction of 5 to 10 percent, after 2 to 3 hours of stirring, standing until all solution bubbles disappear, then placing into an environment of minus 70 DEG C to minus 80 DEG C so as to enable the solution to be frozen quickly, and carrying out vacuum drying at a vacuum degree of minus 0.15 to minus 0.25 Mpa to obtain the porous hydrogel; the porous hydrogel has the advantages that the mechanical strength is excellent, the stain-resistant effect is better, in the preparation method, additional chemicals are not required, high temperature or heating is not required, the operation is simple, and the porous hydrogel and the preparation method are suitable for large scale production in the industry.

Description

technical field [0001] The invention relates to a porous hydrogel and a preparation method thereof, belonging to the technical field of chemical material processing. Background technique [0002] Hydrogel (hydrogels) is a kind of hydrophilic but water-insoluble high molecular polymer. They can quickly swell to an equilibrium volume in water and still maintain their shape and three-dimensional space network structure, and dehydrate and deswell under certain conditions. molecular material. Due to their unique water absorption, water retention and biomimetic properties, hydrogels are widely used in the fields of industry, agriculture, medicine and bioengineering materials. [0003] During the hydrogel swelling process, the solvent penetrates the gel in two ways: the solvent molecules diffuse directly to the outer surface or the interior of the network (independent of the gel volume); the expansion of the network causes the movement of the polymer chains in the solvent. The l...

Claims

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Application Information

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IPC IPC(8): C08L1/26C08L5/04C08K3/16C08K5/09C08J9/28C08J3/075
Inventor 苏潮宁
Owner 苏潮宁
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