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A preparation method based on sodium alginate-based photothermal distillation hydrogel

A technology of sodium alginate and distilled water, applied in the field of photothermal distillation hydrogel preparation, can solve the problems of inability to apply in the field of photothermal water treatment, the shape cannot be kept stable, and the water absorption and evaporation performance is weak, and achieves good light absorption performance and mechanical performance. Excellent effect with few production steps

Active Publication Date: 2022-04-26
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of easy deformation and poor mechanical properties of the existing photothermal distillation materials, and the existing sodium alginate-based photothermal distillation hydrogel is used in the medical field, which has complicated preparation process, difficulty in mass production, and inability to maintain the shape The problem of stability and weak water absorption and evaporation can not be applied in the field of light and hot water treatment, and a preparation method based on sodium alginate-based photothermal distillation hydrogel is provided

Method used

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  • A preparation method based on sodium alginate-based photothermal distillation hydrogel
  • A preparation method based on sodium alginate-based photothermal distillation hydrogel
  • A preparation method based on sodium alginate-based photothermal distillation hydrogel

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specific Embodiment approach 1

[0025] Specific embodiment one: In this embodiment, a preparation method based on sodium alginate-based photothermal distillation hydrogel is carried out according to the following steps:

[0026] 1. Oxidation reaction:

[0027] ①. Add dopamine hydrochloride solution, potassium persulfate solution and sodium bicarbonate solution to sodium alginate solution in sequence to obtain a mixed solution;

[0028] ②. Under the condition of stirring speed of 180r / min~240r / min and temperature of 60℃~80℃, oxidize for 20min~30min, then at room temperature and stirring speed of 180r / min~240r / min, Continue stirring until cooled to room temperature;

[0029] ③. Repeat steps 1 and ② until the solution is black and thick with a viscosity of 2000cP to 3000cP, then add sodium bicarbonate powder and stir evenly to obtain a raw material solution;

[0030] 2. Forming:

[0031] Spread anhydrous calcium chloride powder on the bottom of the container, then pour the raw material liquid evenly into the...

specific Embodiment approach 2

[0045] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the sodium alginate solution described in step 1.1 is prepared according to the following steps: sodium alginate is added to deionized water, and the stirring speed is 180r Stir until the sodium alginate is dissolved at 70°C to 80°C at a temperature of 240r / min to 240r / min to obtain a sodium alginate solution; the mass percentage of the sodium alginate solution is 2.0% to 2.8%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0046]Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass percent of the dopamine hydrochloride solution described in step one 1. is 9%~10%; The mass percent of potassium solution is 4%~4.8%; The mass percent of the sodium bicarbonate solution described in step one 1. is 9.00%~9.50%; The volume of the dopamine hydrochloride solution and potassium persulfate solution described in step one 1. The ratio is 1:(1~1.2); the volume 1:(1.8~2.2) of the dopamine hydrochloride solution and the sodium bicarbonate solution described in the step one 1. step; the dopamine hydrochloride solution and the sodium alginate solution described in the step one 1. The volume ratio is 1:(39~41); the quality of the sodium bicarbonate powder described in step one 3. is the 1.5%~2.0% of the raw material liquid quality that step one 3. prepares. Others are the same as in the first or second embodiment.

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Abstract

A preparation method based on sodium alginate-based photothermal distillation hydrogel, which relates to a preparation method of photothermal distillation hydrogel. The present invention aims to solve the problems of easy deformation and poor mechanical properties of the existing photothermal distillation materials, and the existing sodium alginate-based photothermal distillation hydrogel is used in the medical field, which has complicated preparation process, difficulty in mass production, and inability to maintain the shape The problems of stability and weak water absorption and evaporation performance make it impossible to apply to the field of light and hot water treatment. Preparation method: 1. Oxidation reaction; 2. Forming. The invention is used for the preparation of sodium alginate-based photothermal distillation hydrogel.

Description

technical field [0001] The invention relates to a preparation method of photothermal distillation hydrogel. Background technique [0002] Photothermal distillation technology is a low-energy water purification method based on photothermal materials. Most of the photothermal materials currently studied include plasmonic materials (such as gold, silver and other nanoparticles), carbon nanomaterials (such as graphene, carbon nanotubes, etc.) and semiconductor materials (such as TiO 2 、Ti 3 C 4 、MoO 3 etc.), most of which have the problems of complicated preparation and high cost. Photothermal distillation hydrogel is an emerging photothermal distillation material, which has porous water absorption properties and thus has higher evaporation efficiency. Among them, biomacromolecular hydrogel has the advantages of degradability and low cost. [0003] Existing biomacromolecular hydrogel substrates for photothermal distillation include chitosan, polyvinyl alcohol, etc., which g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08J9/08C08L5/04C08L79/04
CPCC08J3/075C08J9/08C08J2305/04C08J2479/04C08J2203/02
Inventor 潘庆辉陈抒旎帅永马丹妮高文秀
Owner HARBIN INST OF TECH
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