Fiber-based super absorbent resin and calcium chloride composite gel drying agent and preparation method thereof

A superabsorbent resin and composite gel technology, applied in chemical instruments and methods, alkali metal compounds, inorganic chemistry, etc., can solve the problems of many desiccant components and high production costs, achieve low prices, solve leakage, and source wide range of effects

Active Publication Date: 2018-11-06
SUPER DRY DESICCANT SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, calcium chloride is combined with various minerals, inorganic salts, organic matter and water-absorbing resin. Although the composite desiccant obtained has a high moisture absorption rate and is not easy to return water (for example, patent CN 104258824A), the composition of the desiccant is too high. Many, the production cost is too high; Patent CN 103566910A is to compound anhydrous calcium chloride, dihydrate calcium chloride with polyacrylamide and starch, although there is no water overflow after one month, but still in short term (2-3 days) There is a phenomenon of hydrolysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A fiber-based superabsorbent calcium chloride composite gel desiccant is prepared from the following components according to the mass ratio:

[0025] Calcium chloride (CaCl 2 ) 70 parts, and 30 parts of fiber-based water-absorbent resin. Among them, the proportion of each component in the fiber-based water-absorbent resin is: 10% of carboxymethyl cellulose, 100% of acrylamide, 0.1% of crosslinking agent, 1% of initiator, and 2% of sodium salt. Note: The percentage of each component in the fiber-based water-absorbent resin is based on the monomer acrylamide.

[0026] The method for preparing fiber-based superabsorbent calcium chloride composite gel desiccant, the steps are as follows:

[0027] 1) Take 10% carboxymethyl cellulose, add an appropriate amount of water, stir until it is completely swollen, then add 100% acrylamide, 0.1% cross-linking agent, 2% sodium salt in sequence, after mixing evenly, continue to add 0.1% initiator ;

[0028] 2) Put the mixture obtain...

Embodiment 2

[0032] A fiber-based superabsorbent calcium chloride composite gel desiccant is prepared from the following components according to the mass ratio:

[0033] CaCl 2 65 parts, 35 parts of fiber-based water-absorbent resin. Among them, the proportion of each component in the fiber-based water-absorbent resin is: 8% of carboxymethyl cellulose, 100% of acrylamide, 0.2% of crosslinking agent, 0.8% of initiator, and 3% of sodium salt. Note: The percentage of each component in the fiber-based water-absorbent resin is based on the monomer acrylamide.

[0034] The method for preparing fiber-based superabsorbent calcium chloride composite gel desiccant, the steps are as follows:

[0035] 1) Take 8% carboxymethyl cellulose, add an appropriate amount of water, stir until it is completely swollen, add 100% acrylamide, 0.2% cross-linking agent, 3% sodium salt in sequence, after mixing evenly, continue to add 0.8% initiator ;

[0036] 2) Put the mixture obtained in step 1) into a microwa...

Embodiment 3

[0040] A fiber-based superabsorbent calcium chloride composite gel desiccant is prepared from the following components according to the mass ratio:

[0041] CaCl 2 60 parts, 40 parts of fiber-based water-absorbent resin. The proportion of each component in the fiber-based water-absorbent resin is: carboxymethyl cellulose 6%, acrylamide 100%, crosslinking agent 0.5%, initiator 0.5%, and sodium salt 1%. Note: The percentage of each component in the fiber-based water-absorbent resin is based on the monomer acrylamide.

[0042] The method for preparing fiber-based superabsorbent calcium chloride composite gel desiccant, the steps are as follows:

[0043] 1) Take 6% carboxymethyl cellulose, add appropriate amount of water, stir until it is completely swollen, then add 100% acrylamide, 0.5% cross-linking agent, 1% sodium salt in sequence, after mixing evenly, continue to add 0.5% initiator ;

[0044] 2) Put the mixture obtained in step 1) into a microwave oven, polymerize, take...

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Abstract

The invention provides a fiber-based super absorbent resin and calcium chloride composite gel drying agent and a preparation method thereof. The fiber-based super absorbent resin and calcium chloridecomposite gel drying agent is prepared by adopting carboxymethyl cellulose as a basic skeleton of a high-molecular polymer and acrylamide as a polymerization monomer and utilizing a microwave polymerization method, wherein the moisture absorption of the fiber-based super absorbent resin and calcium chloride composite gel drying agent is higher than 400 percent, and the fiber-based super absorbentresin and calcium chloride composite gel drying agent has high salt tolerance, is low in cost and wide in source and is non-toxic and environment-friendly. Meanwhile, gel can be formed after water absorption is carried out on the fiber-based super absorbent resin and calcium chloride composite gel drying agent, and the problem of liquid leakage being likely to be caused during a using process of acalcium chloride drying agent is effectively solved.

Description

technical field [0001] The invention relates to a composite gel desiccant and a preparation method thereof, in particular to a basic skeleton of a high-molecular polymer with modified cellulose and acrylamide as a polymerized monomer, and microwave polymerization to obtain high salt resistance A method for preparing a composite gel desiccant by uniformly spraying calcium chloride melt in a high-speed mixer. Background technique [0002] Desiccant uses its good dehumidification ability to absorb moisture in the medium, keeping the room or the package of articles dry for a long time, so as to achieve the purpose of preventing moisture and mildew. According to different adsorption methods, desiccants are divided into physical adsorption type and chemical adsorption type. Physical hygroscopic types include: silica gel desiccant, molecular sieve desiccant, fiber desiccant, montmorillonite desiccant and mineral desiccant, which use large specific surface area and microporous stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30
CPCB01J20/046B01J20/261B01J20/28047
Inventor 吴丽华苏卓欣
Owner SUPER DRY DESICCANT SHENZHEN
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