A kind of superabsorbent resin, its preparation method and application

A technology of super absorbent resin and aqueous solution, applied in fire protection equipment and other directions, can solve the problems of increased adhesion effect, poor adhesion, and increased production cost of fire extinguishing agent, and achieves the effect of high fire extinguishing efficiency

Active Publication Date: 2020-09-25
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

But at the same time, we found that its adhesion is not good, especially on the surface that has been on fire, especially the vertical wall or the surface containing stainless steel (such as the surface of the oil tanker), because water vaporizes at high temperature, based on polyacrylic acid It is difficult for superabsorbent resin to adhere to its surface, so it cannot effectively cover, cool and cool down
[0004] Patent CN103483752B discloses a method of improving the poor adhesion between polymer fire extinguishing hydrogel and the surface by adding a water-based adhesion promoter of a silane coupling agent, but the silane coupling agent is expensive, which increases the production cost of the fire extinguishing agent
In Xi Yuqin's research, the adhesion was improved by adding a thickener (Xi Yuqin. Study on the flow characteristics and fire extinguishing performance of water after thickening), but the increase in the adhesion effect was not obvious enough

Method used

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  • A kind of superabsorbent resin, its preparation method and application
  • A kind of superabsorbent resin, its preparation method and application
  • A kind of superabsorbent resin, its preparation method and application

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preparation example Construction

[0030] The present invention provides a kind of preparation method of superabsorbent resin, comprises the following steps:

[0031] A) mixing an aqueous solution of an ethylenically unsaturated monomer with an initiator to obtain an aqueous solution; mixing a hydrocarbon dispersion medium with a surfactant to obtain an oily solution;

[0032] B) After mixing the aqueous solution and the oily solution, stir to obtain a super absorbent resin; the rotational speed of the stirring is 500-800 rpm.

[0033] The invention mixes the aqueous solution of the ethylenically unsaturated monomer and the initiator to obtain the aqueous solution.

[0034] In some embodiments of the present invention, the ethylenically unsaturated monomer includes one or more of acrylic acid, acrylate, methacrylic acid, methacrylate and acrylamide.

[0035] In some embodiments of the present invention, the mass concentration of the aqueous solution of the ethylenically unsaturated monomer is 30-100%.

[0036...

Embodiment 1

[0068] Step 1: Prepare an aqueous solution: add 100 g (1.11 mol) of acrylic acid aqueous solution with a mass concentration of 80% to a 300 mL beaker, then add 0.03 g (0.000111 mol) of potassium persulfate, and mix at 25° C.

[0069] Step 2: Prepare an oily solution: Add 600 mL of n-hexane and 1.2 g of polyoxyethylene alkyl ether phosphate into a round bottom flask, and raise the temperature to 70°C.

[0070] The above aqueous solution was added to the above oily solution, and stirred at 60°C and 600 rpm for 20 minutes to obtain a super absorbent resin.

[0071] The superabsorbent resin that embodiment 1 obtains is carried out polarizing microscope analysis, and the result is as follows figure 1 shown. figure 1 It is a polarizing microscope picture of the superabsorbent resin prepared in Example 1 of the present invention. from figure 1 It can be seen that the superabsorbent resin particles are large particles with a rough surface obtained by aggregating a plurality of smal...

Embodiment 2

[0073] Step 1: Prepare an aqueous solution: add 95g (1.05mol) of acrylic acid aqueous solution with a mass concentration of 80% to a 300mL beaker, then add 0.09g (0.000333mol) of potassium persulfate, and mix at 30°C.

[0074] Step 2: Prepare an oily solution: Add 600 mL of n-heptane and 1.5 g of polyoxyethylene alkyl ether phosphate into a round bottom flask, and raise the temperature to 80°C.

[0075] The above aqueous solution was added to the above oily solution, stirred at 70° C. and 650 rpm for 30 min to obtain a super absorbent resin.

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Abstract

The invention relates to the technical field of polymer gel water-based fire extinguishing agents, in particular to a superabsorbent resin, its preparation method and application. The preparation method of the superabsorbent resin comprises: A) mixing an aqueous solution of an ethylenically unsaturated monomer with an initiator to obtain an aqueous solution; mixing a hydrocarbon dispersion medium with a surfactant to obtain an oily solution; B) mixing the After the aqueous solution and the oily solution are mixed, they are stirred to obtain a super absorbent resin. The invention prepares an oily solution containing a hydrocarbon dispersion medium and a surfactant, and an aqueous solution containing an initiator and an ethylenically unsaturated monomer, mixes the two to obtain a suspension, and performs polymerization in the suspension. By controlling the stirring speed, it is ensured that the surface of the obtained superabsorbent resin particles is rough, and after swelling, it is more conducive to adhesion. Therefore, the superabsorbent resin prepared by the present invention has better wall adhesion and is not easy to slip. The hydrogel fire extinguishing agent made of this superabsorbent resin has better fire extinguishing effect.

Description

technical field [0001] The invention relates to the technical field of polymer gel water-based fire extinguishing agents, in particular to a superabsorbent resin, its preparation method and application. Background technique [0002] Water has the advantages of wide sources, low price, and strong fire extinguishing ability. Therefore, it is usually the most important fire extinguishing agent. [0003] Superabsorbent resin has strong water absorption and water retention, and its unique three-dimensional network structure can firmly bind water, so that it has a huge heat capacity. Water-absorbent resins are usually used in agricultural and garden materials such as sanitary materials, water-retaining materials, soil improvement materials, and animal excrement treatment materials. In recent years, relevant scientific researchers have also applied water-absorbent resins to the field of fire extinguishing. Because the water-absorbent resin is mixed with a certain proportion of wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/06A62D1/00C08J3/075
CPCA62D1/0064C08F120/06C08J3/075C08J2333/02
Inventor 许东华李双双石彤非呼微付志磊刘芳潘鸽杨雪赵志刚李思佳汤华清
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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