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A nanocomposite superabsorbent material and its preparation method

A superabsorbent material and nanocomposite technology, applied in the field of functional polymer materials, can solve problems such as application limitations, agglomeration and agglomeration, and performance impact of superabsorbent resins, and achieve uniform and stable particle size, fast absorption rate, and short drying time. shortened effect

Active Publication Date: 2021-03-30
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although people have done a lot of research on solution polymerization, its water absorption rate and pressure absorption often need to be post-treated to meet the requirements.
Moreover, due to the characteristics of the solution polymerization method in the prior art, it is easy to agglomerate and agglomerate during polymerization, so the performance of the superabsorbent resin will be affected, and the application will be limited.

Method used

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  • A nanocomposite superabsorbent material and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1 A kind of nanocomposite superabsorbent material

[0031] A method for preparing a nanocomposite superabsorbent material, comprising the following steps:

[0032] (1) Sodium hydroxide is dissolved in deionized water to obtain an alkali solution with a mass content of 55% of sodium hydroxide, and acrylic acid is added to the alkali solution under stirring to obtain a partially neutralized acrylate solution. The mixture of sodium hydroxide and acrylic acid is The amount ratio is 0.8; cool down to normal temperature (25±2°C), add acrylamide, crosslinking agent, initiator, and stir to obtain reaction solution A;

[0033] Among them, the addition of acrylamide is 5% of the mass of acrylic acid; the crosslinking agent is butanediol diacrylate, and the addition of the crosslinking agent is 0.05% of the mass of acrylic acid; the initiator is potassium persulfate, and the addition of the initiator is 0.2% of the mass of acrylic acid;

[0034] (2) Transfer the react...

Embodiment 2

[0038] Embodiment 2 A nanocomposite superabsorbent material

[0039] A method for preparing a nanocomposite superabsorbent material, comprising the following steps:

[0040] (1) Sodium hydroxide is dissolved in deionized water to obtain an alkali solution with a mass content of 55% of sodium hydroxide, and acrylic acid is added to the alkali solution under stirring to obtain a partially neutralized acrylate solution. The mixture of sodium hydroxide and acrylic acid is The ratio of the amount is 0.7; cool down to normal temperature, add acrylamide, cross-linking agent, initiator, stir evenly to obtain the reaction solution A;

[0041] Among them, the addition of acrylamide is 10% of the mass of acrylic acid; the addition of the crosslinking agent trimethylolpropane trimethacrylate is 0.2% of the mass of acrylic acid; the initiator is sodium persulfate, the initiator The addition amount is 0.3% of acrylic acid quality;

[0042] (2) Transfer the reaction solution A to a polytet...

Embodiment 3

[0046] Embodiment 3 A nanocomposite superabsorbent material

[0047] A method for preparing a nanocomposite superabsorbent material, comprising the following steps:

[0048] (1) Sodium hydroxide is dissolved in deionized water to obtain an alkali solution with a mass content of 55% of sodium hydroxide, and acrylic acid is added to the alkali solution under stirring to obtain a partially neutralized acrylate solution. The mixture of sodium hydroxide and acrylic acid is The amount ratio is 0.6; cool down to normal temperature, add acrylamide, crosslinking agent, initiator, stir evenly to obtain reaction solution A;

[0049] Among them, the addition of acrylamide is 7% of the mass of acrylic acid; the cross-linking agent is butanediol diacrylate, and the addition of the cross-linking agent is 0.05% of the mass of acrylic acid; the initiator is potassium persulfate, and the addition of the initiator is 0.05% of the mass of acrylic acid;

[0050] (2) Transfer the reaction solutio...

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Abstract

The invention discloses a nano composite high-hygroscopicity material and a preparation method therefor. According to the nano composite high-hygroscopicity material and the preparation method therefor, silica sol is dispersed in an acrylic neutralizing solution for modification, SiO2 nanoparticles are produced in situ during cross-linking copolymerization of acrylic acid and an acrylamide monomer, and then, reactive compounding of SiO2 nanoparticles and a polyacrylic polymer is achieved; the prepared nano composite high-hygroscopicity material is prepared from a low-crosslinking-degree resinmatrix with high water absorption multiplying power and high water absorption rate and a nano composite high-crosslinking-degree surface layer, the water absorption multiplying power is increased under pressure, and finally, the high-hygroscopicity composite material is prepared; the dispersity is good; and meanwhile, microchannels are formed between inorganic nanoparticles and a polymer, the volatilized overflow of internal water molecules is facilitated, the drying effect of the high-hygroscopicity material is better, the drying time is shortened obviously, the production efficiency is increased, the production cost is reduced, and thus, the nano composite high-hygroscopicity material is suitable for being produced on a large scale and has an extensive application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials, and more specifically relates to a nanocomposite superabsorbent material and a preparation method thereof. Background technique [0002] Superabsorbent resin refers to a cross-linked polymer with strong hydrophilicity but insoluble in water. It is an important superabsorbent material, which can absorb water dozens or even hundreds or thousands of times its own weight to form a gel. It is used in baby diapers, sanitary napkins and other sanitary materials, as well as drought resistance and water conservation, agriculture, forestry and gardening. With the rapid development of science and technology and the continuous improvement of people's living standards, its application fields are expanding and gradually penetrate into industrial production and people's lives. field. The main types of superabsorbent materials are polyacrylic acid and its copolymerized superabsorbent materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/02C08K3/36C08F220/06C08F220/56C08F222/14
Inventor 易国斌林文静俎喜红唐子伦梁红萍
Owner GUANGDONG UNIV OF TECH
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