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Preparation method of nicandra physaloides gum/polyvinyl alcohol composite hydrogel with porous structure

A composite hydrogel, porous structure technology, applied in water/sewage treatment, general water supply conservation, chemical instruments and methods, etc. Weak capacity and other problems, to achieve the effect of enhancing the interception capacity and reducing the evaporation enthalpy

Pending Publication Date: 2022-02-15
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, traditional hydrogels still face two major problems when used for interfacial photoevaporation. One is that the light absorption ability of general hydrogels is weak, and the other is that their water transport and water retention functions are not ideal, resulting in a low evaporation rate.

Method used

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  • Preparation method of nicandra physaloides gum/polyvinyl alcohol composite hydrogel with porous structure
  • Preparation method of nicandra physaloides gum/polyvinyl alcohol composite hydrogel with porous structure

Examples

Experimental program
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Effect test

Embodiment 1

[0025] After adding 1g of polyvinyl alcohol to dissolve at 60°C, stir until the solution is uniform and stable. Add 125 μL of glutaraldehyde and 100 μL of polypyrrole solution, ultrasonically mix evenly, then stir and add 500 μL of hydrochloric acid solution and 100 μL of calcium chloride solution. The mixed solution was injection molded and sealed, and after gelling at room temperature for 2 hours, it was soaked in deionized water for 24 hours to obtain a hydrogel. The hydrogel was frozen with liquid nitrogen, thawed in a water bath at 30° C., and the polyvinyl alcohol hydrogel was obtained by repeated freezing and thawing 10 times.

Embodiment 2

[0027] First, 0.005g of pseudophysalis powder was dissolved in 10mL of deionized water at 40°C. Then add 0.995g of polyvinyl alcohol to dissolve at 70°C, and stir until the solution is uniform and stable. Add 125 μL of glutaraldehyde and 100 μL of polypyrrole solution, ultrasonically mix evenly, then stir and add 500 μL of hydrochloric acid solution and 100 μL of calcium chloride solution. The mixed solution was injection molded and sealed, and after gelling at room temperature for 2 hours, it was soaked in deionized water for 24 hours to obtain a composite hydrogel. The composite hydrogel was frozen in liquid nitrogen, thawed in a water bath at 30°C, and the double network hydrogel was obtained by repeated freezing and thawing 10 times.

Embodiment 3

[0029] First, 0.025g of pseudophysalis powder was dissolved in 10mL of deionized water at 50°C. Then add 0.975g of polyvinyl alcohol to dissolve at 50°C, and stir until the solution is uniform and stable. Add 125 μL of glutaraldehyde and 100 μL of polypyrrole solution, ultrasonically mix evenly, then stir and add 500 μL of hydrochloric acid solution and 100 μL of calcium chloride solution. The mixed solution was injection molded and sealed. After gelling at room temperature for 2 hours, it was soaked in deionized water for 24 hours to obtain a composite hydrogel. The composite hydrogel was frozen in liquid nitrogen, thawed in a water bath at 30°C, and the freeze-thaw was repeated 10 times to obtain a uniform porous double network hydrogel.

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Abstract

The invention discloses a preparation method of nicandra physaloides gum / polyvinyl alcohol double-network composite hydrogel with a porous structure. The hydrogel is prepared from the following raw materials by mass: nicandra physaloides gum:polyvinyl alcohol:deionized water:glutaraldehyde:calcium ions:hydrochloric acid=(0.001-0.05 g):(0.95-0.999 g):(6-10 g):(50-200 [mu]L): (10-600 [mu]L):(100-600 [mu]L). The porous double-network hydrogel disclosed by the invention shows stable desalination efficiency and excellent sewage treatment capacity in a solar water purification technology.

Description

technical field [0001] The invention belongs to the field of preparation of double-network hydrogel materials, in particular to a method for preparing a porous-structured pseudophysalis glue / polyvinyl alcohol double-network hydrogel. Background technique [0002] Fresh water is an indispensable resource for human survival and development, but the world is currently facing an increasingly serious crisis of fresh water resources. Desalination of seawater or sewage treatment is an effective way to obtain fresh water at present. Commonly used technologies include reverse osmosis, ion exchange membrane and membrane distillation. However, the above water purification technologies often face problems such as high energy consumption, difficulty in cleaning, and high cost. Therefore, there is an urgent need to develop efficient, economical, and scalable technologies for seawater desalination or wastewater treatment. Solar energy is a green renewable energy with large reserves, wide...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L29/04C08L79/04C08L5/00C08K5/07C08K3/16C08J9/00C02F1/14C02F103/08
CPCC08J3/075C08J3/246C08J9/0061C02F1/14C08J2329/04C08J2479/04C08J2405/00C08K5/07C08K2003/162C02F2103/08Y02A20/124Y02A20/142Y02A20/212
Inventor 李小可罗伯秋王浩
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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