Amphoteric polyelectrolyte photo-thermal hydrogel as well as preparation and application thereof

A polyelectrolyte, hydrogel technology, applied in general water supply conservation, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as poor antifouling performance, and achieve hindering adsorption, desalination and antifouling, and enhancing water evaporation. effect of action

Active Publication Date: 2021-10-22
HUAZHONG UNIV OF SCI & TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a kind of amphoteric polyelectrolyte photothermal gel, its preparation and application, which is composed of amphoteric polyelectrolyte The mixture of electrolyte monomer, crosslinking agent, initiator and photothermal material is obtained by copolymerization. Due to the strong hydration ability of the amphoteric polyelectrolyte, the antifouling function of the photothermal material in the process of water evaporation is realized, which is truly environmentally friendly and efficient. The photothermal gel, thus solving the technical problem of poor antifouling performance of the prior art hydrogel-based photothermal materials used in the water evaporation process

Method used

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  • Amphoteric polyelectrolyte photo-thermal hydrogel as well as preparation and application thereof
  • Amphoteric polyelectrolyte photo-thermal hydrogel as well as preparation and application thereof
  • Amphoteric polyelectrolyte photo-thermal hydrogel as well as preparation and application thereof

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[0037] The present invention also provides a preparation method of the amphoteric polyelectrolyte photothermal gel, comprising the following steps:

[0038] (1) Dispersing the amphoteric polyelectrolyte monomer, crosslinking agent, initiator and photothermal material in water to obtain a prepolymerized mixture;

[0039] (2) Copolymerize the prepolymerization mixture described in step (1) by heating or lighting;

[0040] (3) soaking in water to wash away unreacted raw materials, thereby obtaining amphoteric polyelectrolyte photothermogel.

[0041] In the preparation method of the amphoteric polyelectrolyte photothermal gel of the present invention, the order of addition is not limited. In step (1), the dispersion liquid of photothermal material in water and the dispersion liquid of amphoteric polyelectrolyte monomer, cross-linking agent and initiator in water can be obtained respectively, and then mixed; or the amphoteric polyelectrolyte monomer, cross-linking The agent and t...

Embodiment 1

[0049] A preparation method of amphoteric polyelectrolyte photothermal gel, such as figure 1 shown, including the following steps:

[0050] The first step: in a beaker, graphene oxide is evenly dispersed in deionized water to obtain a graphene oxide dispersion with a concentration of 0.5wt.%, and 8g [2-(methacryloyl) is added to 20mL deionized water at room temperature Oxygen) ethyl] dimethyl-(3-sulfonic acid propyl) ammonium hydroxide (SBMA), stir to make it dissolve, obtain the SBMA solution of 40wt.% mass concentration;

[0051] The second step: in the first step SBMA solution, add graphene oxide dispersion, 0.03g cross-linking agent N, N-methylenebisacrylamide and 0.1g initiator ammonium persulfate, the addition of graphene oxide dispersion is 10wt.% of the mass of the SBMA solution, the amount of the crosslinking agent is 0.1wt.% of the SBMA solution.

[0052] The third step: react the prepolymer of the second step at 50°C for 6h until a black amphoteric polyelectrolyte...

Embodiment 2

[0060] A preparation method of amphoteric polyelectrolyte photothermal gel, comprising the steps of:

[0061] Step 1: In a beaker, polypyrrole is uniformly dispersed in deionized water to obtain a polypyrrole dispersion with a concentration of 10 mg / mL, and 8 g of [2-(methacryloyloxy) Ethyl] dimethyl-(3-sulfonic acid propyl group) ammonium hydroxide (SBMA), stir to make it dissolve, obtain the SBMA solution of 40wt.% mass concentration;

[0062] Step 2: Add polypyrrole dispersion, 0.03g crosslinking agent N,N-methylenebisacrylamide and 0.1g initiator ammonium persulfate to the SBMA solution in the first step, and the amount of graphene oxide dispersion added is SBMA 10wt.% of the solution mass, the amount of crosslinking agent is 0.1wt.% of the SBMA solution.

[0063] The third step: react the prepolymer of the second step at 50° C. for 6 hours until a black amphoteric polyelectrolyte hydrogel is formed, and the product is soaked in deionized water to remove unreacted substan...

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Abstract

The invention belongs to the field of functional polymer materials and particularly relates to amphoteric polyelectrolyte photo-thermal hydrogel as well as preparation and application thereof. The amphoteric polyelectrolyte photo-thermal hydrogel comprises amphoteric polyelectrolyte hydrogel and a photo-thermal material, wherein the photo-thermal material is dispersed in the amphoteric polyelectrolyte hydrogel; the amphoteric polyelectrolyte photo-thermal hydrogel is obtained by copolymerization of an amphoteric polyelectrolyte monomer, a cross-linking agent, an initiator and a photo-thermal material mixture. By utilizing the biological pollution prevention capacity of the amphoteric polyelectrolyte hydrogel, the defect that the surface of a traditional photo-thermal steam conversion material is easily polluted when the traditional photo-thermal steam conversion material is used for treating sewage such as high-concentration brine, seawater and industrial wastewater is overcome, and the service life of the photo-thermal steam conversion material in photo-thermal steam conversion application is prolonged.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and more specifically relates to an amphoteric polyelectrolyte photothermal gel, its preparation and application. Background technique [0002] At present, one quarter of the world's population is facing water shortages, and water shortages have also affected the operation and development of many fields. In recent years, solar energy has been used in many fields such as photothermal water production and photothermal power generation. Among them, the interface solar heating evaporation water technology has great potential to solve water pollution and fresh water shortage, and its advantages of high efficiency, low cost, and easy operation have attracted the attention of researchers. [0003] In the field of interfacial solar heating to evaporate water, photothermal conversion materials are the key to realize high-efficiency solar-thermal energy conversion. At present, the light-to-hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/14C08L79/04C08L43/02C08K3/04C08J3/075C08F220/38C08F222/38C08F230/02C08F120/38C02F1/14
CPCC08J3/075C08F220/38C08F230/02C08F120/38C02F1/048C02F1/14C08J2333/14C08J2479/04C08J2343/02C08K3/042C08K3/041C08K2201/011C08F222/385Y02A20/212Y02A20/124Y02A20/142
Inventor 张连斌胥敬维朱锦涛
Owner HUAZHONG UNIV OF SCI & TECH
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