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A kind of core-shell water-locking material and its preparation method and application

A water-locking, core-shell technology, which is applied in the field of core-shell water-locking materials and their preparation, can solve the problems of facilitation of water, recovery of solvents in the preparation process, complex dispersants, and inability to lock water, so as to achieve reasonable size and high efficiency. One-way water-locking performance, the effect of improving the performance of photochemical water

Active Publication Date: 2018-02-16
广东维芊科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, at present, the superabsorbent resin products synthesized with acrylic acid as the main raw material generally have the defect that after absorbing water, the water is easily melted by light and the water cannot be locked; moreover, there is a complicated process of recycling solvents and dispersants during the preparation process

Method used

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  • A kind of core-shell water-locking material and its preparation method and application
  • A kind of core-shell water-locking material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation method of core-shell water-locking material:

[0029] ① Add 72.06g of acrylic acid to 38.88g of deionized water, mix well, and neutralize with 30% sodium hydroxide solution (26g of sodium hydroxide + 60.67g of deionized water) at room temperature until the neutralization degree is 65%. Then 24.02 g of hydroxyethyl acrylate were added.

[0030] ② After the neutralization solution is cooled to room temperature, add sodium alginate: 2g, tetraallyloxyethane: 0.48g, azobisisobumizole hydrochloride: 0.2g, potassium persulfate: 0.05g, carbonic acid Sodium hydrogen: 1.6g, urea: 4.8g, ethanol: 3.2g; mix well and set aside.

[0031] ③Take 300g of simethicone oil with a viscosity of 100mPa·s, slowly pour 100g of calcium chloride solution with a mass fraction of 10% into the simethicone oil. After the oil-water layer was separated, the oil phase was heated to 70°C, and the reaction liquid was added dropwise. After the reaction, the filter bucket was lifted to collect...

Embodiment 2

[0033] Preparation method of core-shell water-locking material:

[0034] ① Add 72.06g of acrylic acid to 38.88g of deionized water, mix well, and neutralize with 30% sodium hydroxide solution (26g of sodium hydroxide + 60.67g of deionized water) at room temperature until the neutralization degree is 65%. Then 24.02 g of acrylamide was added.

[0035] ② After the neutralization solution is cooled to room temperature, add sodium alginate: 2g, tetraallyloxyethane: 0.48g, azobisisobumisole hydrochloride: 0.2g, ammonium persulfate: 0.05g, carbonic acid Sodium hydrogen: 1.6g, urea: 4.8g, ethanol: 3.2g; mix well and set aside.

[0036] ③Take 300g of simethicone oil with a viscosity of 100mPa·s, slowly pour 100g of calcium chloride solution with a mass fraction of 10% into the simethicone oil. After the oil-water layer was separated, the oil phase was heated to 70°C, and the reaction liquid was added dropwise. After the reaction, the filter bucket was lifted to collect the product,...

Embodiment 3

[0038] Preparation method of core-shell water-locking material:

[0039] ① Add 72.06g of acrylic acid to 38.88g of deionized water, mix well, and neutralize with 30% sodium hydroxide solution (26g of sodium hydroxide + 60.67g of deionized water) at room temperature until the neutralization degree is 65%. Then 24.02 g of acrylamide was added.

[0040]② After the neutralization solution is cooled to room temperature, add sodium alginate: 2g, tetraallyloxyethane: 0.48g, azobisisobumizole hydrochloride: 0.2g, potassium persulfate: 0.05g, carbonic acid Potassium hydrogen: 1.6g, urea: 4.8g, acetone: 3.2g; mix well and set aside.

[0041] ③Take 300g of simethicone oil with a viscosity of 100mPa·s, slowly pour 100g of calcium chloride solution with a mass fraction of 10% into the simethicone oil. After the oil-water layer was separated, the oil phase was heated to 70°C, and the reaction liquid was added dropwise. After the reaction, the filter bucket was lifted to collect the produ...

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Abstract

The invention belongs to the technical field of new materials, and particularly relates to a core-shell moisturizing material, and a preparation method and application thereof. The particle diameter of the core-shell moisturizing material is 80-160 mu m, the shell is a calcium alginate film of which the thickness is 10-50 mu m, and the core is a mixture of an anionic monomer and a nonionic monomer. The preparation method comprises the following steps: neutralizing acrylic acid and / or methacrylic acid with a sodium hydroxide solution; then adding acrylamide and / or hydroxyethyl acrylate; sequentially adding sodium alginate shell-building agent, crosslinking agent and initiator, and uniformly mixing to obtain a reaction solution; finally, dropwisely adding the reaction solution into an oil-water phase, and reacting; and after the reaction is completed, washing, and drying to obtain the product. According to the invention, the shell thickness of the moisturizing microsphere material can be effectively controlled, thereby being capable of controlling the light resistance and moisturizing property of the material after water absorption; and the core-shell moisturizing material can be widely used for water absorption application in the aspects of moisture retention of dry soil, medical health and daily service.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a core-shell water-locking material and a preparation method and application thereof. Background technique [0002] Super Absorbent Polymer (SAP) is a kind of water-absorbing polymer material invented in the 1960s. Its main raw material is starch, but it has not been paid attention to by people because of its poor performance and instability. With the rapid economic development in the 21st century and the improvement of people's quality of life, the synthesis technology and application of SAP materials have developed rapidly, and the raw material has been changed from starch to acrylic acid. Up to now, polyacrylate superabsorbent resin is the most researched and produced synthetic superabsorbent resin at present. This kind of product has a high water absorption rate, which can reach more than a thousand times, and its performance is relatively stable, so it is widely used. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/28C08J3/24C08J3/12C08J9/08C08J9/10C08J9/14
CPCC08F220/06C08J3/12C08J3/24C08J9/08C08J9/104C08J9/142C08J2305/04C08J2333/02C08F220/281
Inventor 曾雁张翠荣朱其安梁祥军罗海倩
Owner 广东维芊科技有限公司
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