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Preparation method and application of hydrogel material

A hydrogel and solution technology is applied to the preparation of hydrogel materials and the field of new fireproof materials, which can solve the problems of poor mechanical properties and easy volatility of hydrogels, and achieve stable water content, low energy consumption and simple preparation method. reliable results

Active Publication Date: 2019-08-23
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to solve the problems that the moisture contained in the existing hydrogel is volatile in the atmospheric environment and the mechanical properties of the hydrogel are poor, and to provide a preparation method for the hydrogel method, the preparation method is simple and reliable, the raw materials are cheap and easy to obtain, and the energy consumption is low; moreover, the hydrogel prepared by the preparation method has the characteristics of high strength and stable water content

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  • Preparation method and application of hydrogel material
  • Preparation method and application of hydrogel material
  • Preparation method and application of hydrogel material

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1. Preparation of hydrogel materials

[0033] (1) Prepare 20 mL of 0.5 mol / L NaCl solution, and dissolve 0.14 g of sodium dodecylbenzenesulfonate in the solution, and stir evenly to obtain a preconfigured solution, which is the mass percentage of sodium dodecylbenzenesulfonate is 7 wt%.

[0034] (2) Add 1 mol / L acrylamide, 0.01 mol / L octadecyl methacrylate, and 0.001 mol / L initiator to the mixed solution in sequence, stir well and pass through N 2 10 min to remove the oxygen in the solution to prepare a pre-polymerization solution;

[0035] (3) Pour the pre-polymerization solution into a glass mold and irradiate with 365 nm ultraviolet light for 12 h to form a hydrogel;

[0036] (4) Take the hydrogel out of the mold and soak it in 0.1 mol / L lithium chloride solution for 3 h to obtain the hydrogel material.

Embodiment 2-4

[0038] In Example 2-4, steps (1), (3) and (4) are the same as in Example 1, except that the molar concentrations of acrylamide, stearyl methacrylate and initiator in step (2) are different , the concentration of each component in step (2) in Example 2-4 is shown in Table 1. The hydrogel materials prepared in each embodiment were used for the fire performance test.

[0039] The concentration of acrylamide, stearyl methacrylate and initiator in table 1 embodiment 1-4

[0040] Example Acrylamide / mol / L Octadecyl methacrylate / mol / L Initiator / mol / L Example 1 1 0.01 0.001 Example 2 2 0.02 0.002 Example 3 3 0.03 0.003 Example 4 4 0.04 0.004

[0041] The hydrogel material prepared by embodiment 1-4 is used for fire performance test, and test result is as follows figure 1 shown. The hydrogels with different components all exhibited excellent fire performance, and could not be penetrated by the flame under the high temperature flame ...

Embodiment 5-14

[0043] In Example 5-14, steps (1) to (3) are the same as in Example 1, except that the hygroscopic chloride salt solution soaked in step (4) is different, and the steps in Example 5-14 ( 4) The hygroscopic chloride salt solution is shown in Table 2.

[0044] The hydrogel materials prepared in Examples 5-14 were used for the fire performance test and the water loss rate test, and the specific test contents are shown in Table 2. Test results such as Figure 2-Figure 5 shown.

[0045] The composition, concentration and the test experiment of each embodiment of hygroscopic chloride salt solution in table 2

[0046] Example hygroscopic chloride salt Solution concentration / mol / L Test content Example 5 lithium chloride saturation concentration Fire performance test, 180-day exposure fire performance test Example 6 lithium chloride 2 Fire performance test, through cut fire performance test Example 7 magnesium chloride 0.1 Water loss test ...

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Abstract

The invention discloses a preparation method and application of a hydrogel material. According to the method, firstly high-strength self-healing hydrogel is synthesized by free radical polymerization,then the hydrogel is soaked into a salt solution to make the hydrogel loaded with a hygroscopic inorganic salt, so that the hydrogel material maintains a stable water content for a long period of time in the atmosphere; and when the hydrogel is exposed to high-temperature flames, moisture contained in the hydrogel absorbs a large amount of heat due to heating and gasification, the temperature ismaintained at a boiling point of a solution contained in the hydrogel to prevent fire from spreading to cause a fire disaster, and the hydrogel material can be used in the fields of building fireproofcoatings and fire blankets. The preparation method provided by the invention is simple and reliable, has cheap and easily-available raw materials and low energy consumption, and is suitable for large-scale preparation, thereby facilitating promotion and application of the novel hydrogel fireproof material.

Description

technical field [0001] The invention relates to a novel fireproof material and belongs to the technical field of new materials. Specifically relates to a preparation method and application of a hydrogel material. Background technique [0002] Among all liquid and solid substances, water has the largest specific heat capacity, as high as 4.2×103 J / (kg·K). Water has a great latent heat of vaporization. Under standard atmospheric pressure, the latent heat of vaporization of water is as high as 2257.2 kJ / kg. Moreover, water is liquid in a natural state, and spreading on the surface of objects can isolate oxygen. When water is in contact with the combustible, the process of temperature rise and phase change will absorb a large amount of heat, reducing the temperature to below the ignition point of the combustible. At the same time, water can block the oxygen required for combustion. Therefore, water is an ideal fire extinguishing substance. However, since water is fluid and ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F293/00C08F2/48C08J3/075
CPCC08F293/00C08F2/48C08J3/075C08J2353/00
Inventor 郑汶江邹伟颜杰杨虎刘兴勇崔晓凤
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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