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Preparation method of moisture absorbent with high water absorbility

A hygroscopic agent and high water absorption technology, which is applied in the field of preparation of high water absorbent hygroscopic agent, can solve the problems of poor water absorption capacity and short service life of the hygroscopic agent, and achieve the effect of improving fine crushing effect, long service life and simple process

Inactive Publication Date: 2017-08-18
JILIN UNIV FIRST HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem actually solved by the present invention is: to solve the problem of weak water absorption capacity and short service life of the hygroscopic agent, the key technical means adopted is to form a uniform dense structure, the invention provides a method for preparing a highly water-absorbing hygroscopic agent, and the prepared hygroscopic agent has high water absorption efficiency

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing a superabsorbent hygroscopic agent, comprising the following steps:

[0019] (1) Weigh raw materials in parts by weight: 100 parts of starch-grafted sodium polyacrylate with a molecular weight of 3000-5000, 8 parts of sodium dodecyl diphenyl ether disulfonate, 3 parts of calcium chloride, and 3 parts of magnesium sulfate , 500 parts of propylene glycol, spare;

[0020] (2) Starch-grafted sodium polyacrylate and sodium dodecyl diphenyl ether disulfonate are added to propylene glycol, stirred for 30 minutes, then calcium chloride and magnesium sulfate are added, and put into a microwave reactor. 150W, 60 minutes at 120°C;

[0021] (3) The propylene glycol was distilled off under reduced pressure, and the solid was dried at a temperature of 120° C. to obtain a hygroscopic agent.

Embodiment 2

[0023] A method for preparing a superabsorbent hygroscopic agent, comprising the following steps:

[0024] (1) Weigh raw materials by weight: 100 parts of starch-grafted sodium polyacrylate with a molecular weight of 3000-5000, 15 parts of sodium dodecyl diphenyl ether disulfonate, 10 parts of calcium chloride, and 10 parts of magnesium sulfate , 500 parts of propylene glycol, spare;

[0025] (2) Starch-grafted sodium polyacrylate and sodium dodecyl diphenyl ether disulfonate are added to propylene glycol, stirred for 15 minutes, then calcium chloride and magnesium sulfate are added, and put into a microwave reactor. 100W, at 160°C, for 30 minutes;

[0026] (3) The propylene glycol was distilled off under reduced pressure, and the solid was dried at a temperature of 120° C. to obtain a hygroscopic agent.

Embodiment 3

[0028] A method for preparing a superabsorbent hygroscopic agent, comprising the following steps:

[0029] (1) Weigh raw materials in parts by weight: 100 parts of starch-grafted sodium polyacrylate with a molecular weight of 3000-5000, 12 parts of sodium dodecyl diphenyl ether disulfonate, 6 parts of calcium chloride, and 6 parts of magnesium sulfate , 500 parts of propylene glycol, spare;

[0030] (2) Starch-grafted sodium polyacrylate and sodium dodecyl diphenyl ether disulfonate are added to propylene glycol, stirred for 25 minutes, then calcium chloride and magnesium sulfate are added, and put into a microwave reactor. 120W, 45 minutes at 150°C;

[0031] (3) The propylene glycol was distilled off under reduced pressure, and the solid was dried at a temperature of 120° C. to obtain a hygroscopic agent.

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Abstract

The invention discloses a preparation method of a moisture absorbent with high water absorbility. The method comprises the steps that firstly, starch grafted sodium polyacrylate and sodium alkyl diphenyl ether disulfonate are added into propylene glycol and stirred for a period of time, calcium chloride and magnesium sulfate are added, and a microwave reaction is performed; then, reduced pressure distillation is performed to remove propylene glycol, solids are dried, and the moisture absorbent is obtained. The novel moisture absorbent is prepared in the mode of mixing water absorbent resin and an inorganic water absorbent, and the using effect is greatly improved compared with that of independent use of the water absorbent resin or the inorganic water absorbent; the sodium alkyl diphenyl ether disulfonate surface active agent is added, the components are mixed under the microwave condition, the uniform and close structure can be formed, and the fine crushing effect of the water absorbent is improved; compared with the prior art, the moisture absorbent has the high absorbility, is simple in technology and long in service life and generates no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of hygroscopic agents, and in particular relates to a preparation method of a superabsorbent hygroscopic agent. Background technique [0002] Polymer water-absorbing resin is a new type of functional polymer material. It has a hydrophilic group, can absorb a large amount of water and swells and can keep the water from flowing out. It mainly includes grafted starch (starch and acrylic acid graft copolymer crosslinked) material) and cross-linked polyacrylates, such as starch grafted acrylate, grafted acrylamide, high degree of substitution cross-linked carboxymethyl cellulose, cross-linked carboxymethyl cellulose grafted acrylamide, cross-linked Type hydroxyethyl cellulose grafted acrylamide polymers, etc., can generally absorb water equivalent to more than 100 times the volume of the resin, and the highest water absorption rate can reach more than 1,000 times. It is generally used as medical materials, such...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/28
CPCB01D53/28B01D2257/80B01D2258/06
Inventor 曾双
Owner JILIN UNIV FIRST HOSPITAL
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