Preparation method of PAA hydrogel loaded with double-bond dopamine

A dopamine and double bond technology, applied in the field of preparation of PAA hydrogels, can solve problems such as ecosystem threats and achieve the effect of increasing the adsorption effect

Active Publication Date: 2020-05-19
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Water pollution by heavy metals lead and cadmium has potential impacts on human health and poses a serious threat to ecosystems even at low concentrations due to bioaccumulation and biomagnification of Pb and Cd

Method used

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  • Preparation method of PAA hydrogel loaded with double-bond dopamine
  • Preparation method of PAA hydrogel loaded with double-bond dopamine
  • Preparation method of PAA hydrogel loaded with double-bond dopamine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of a PAA hydrogel loaded with double bonded dopamine, comprising the following steps:

[0029] Step 1. Add 20 mg of double-bonded dopamine into 10 mL of deionized water, and disperse by ultrasonication for 10 minutes to obtain a double-bonded dopamine dispersion; the ultrasonic frequency is 30 kHz, and the ultrasonic power is 300 W;

[0030] Step 2. Mix 2g of acrylic acid A with the double-bonded dopamine dispersion in step 1, stir for 30 minutes, then add 0.5g of ammonium persulfate, stir for another 30 minutes to initiate cross-linking, and place it under a 150W ultraviolet lamp for 30 minutes to accelerate the solution coagulation After gelling, cool to room temperature, put it in the refrigerator to freeze overnight, and then take it out to thaw to obtain a hydrogel;

[0031] The preparation method of the double-bonded dopamine is as follows: adding 25 g of sodium borate and 5 g of sodium bicarbonate into 170 mL of water and stirring and dissolv...

Embodiment 2

[0033] A preparation method of a PAA hydrogel loaded with double bonded dopamine, comprising the following steps:

[0034] Step 1. Add 100 mg of double-bonded dopamine into 10 mL of deionized water, and disperse by ultrasonication for 10 minutes to obtain a double-bonded dopamine dispersion; the ultrasonic frequency is 30 kHz, and the ultrasonic power is 300 W;

[0035] Step 2. Mix 2g of acrylic acid A with the double-bonded dopamine dispersion in step 1, stir for 30 minutes, then add 0.5g of ammonium persulfate, stir for another 30 minutes to initiate cross-linking, and place it under a 150W ultraviolet lamp for 30 minutes to accelerate the solution coagulation After gelling, cool to room temperature, put it in the refrigerator to freeze overnight, and then take it out to thaw to obtain a hydrogel;

[0036]The preparation method of the double-bonded dopamine is as follows: adding 25 g of sodium borate and 5 g of sodium bicarbonate into 170 mL of water and stirring and dissolv...

Embodiment 3

[0038] A preparation method of a PAA hydrogel loaded with double bonded dopamine, comprising the following steps:

[0039] Step 1. Add 200 mg of double-bonded dopamine into 10 mL of deionized water, and disperse by ultrasonication for 10 minutes to obtain a double-bonded dopamine dispersion; the ultrasonic frequency is 30 kHz, and the ultrasonic power is 300 W;

[0040] Step 2. Mix 2g of acrylic acid A with the double-bonded dopamine dispersion in step 1, stir for 30 minutes, then add 0.5g of ammonium persulfate, stir for another 30 minutes to initiate cross-linking, and place it under a 150W ultraviolet lamp for 30 minutes to accelerate the solution coagulation After gelling, cool to room temperature, put it in the refrigerator to freeze overnight, and then take it out to thaw to obtain a hydrogel; figure 1 SEM images of the hydrogel (b) prepared for Example 3 of the present invention and pure polyacrylic acid hydrogel (a);

[0041] The preparation method of the double-bonde...

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Abstract

The invention discloses a preparation method of PAA hydrogel loaded with double-bond dopamine. The preparation method comprises the following steps: adding double-bond dopamine into deionized water, and carrying out ultrasonic dispersion to obtain a double-bond dopamine dispersion liquid; mixing acrylic acid A with the double-bond dopamine dispersion liquid, stirring, adding ammonium persulfate, stirring to initiate cross-linking, placing an obtained system under an ultraviolet lamp for illumination, accelerating solution gelatinization, cooling to room temperature, freezing in a refrigeratorovernight, taking out, and unfreezing to obtain the hydrogel. Acrylic acid used in the invention is subjected to a cross-linking reaction to form gel, and the purely cross-linked PAA hydrogel has goodmechanical strength and few functional groups; after the double-bond dopamine is added, the double-bond dopamine directly participates in forming gel as a hydrogel skeleton, so that functional groupscan be increased under the condition of not greatly changing the strength, and the adsorption effect of the hydrogel on heavy metal ions is greatly improved; therefore, the hydrogel can be used as anadsorbent for adsorbing lead and cadmium ions more effectively.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a preparation method of PAA hydrogel loaded with double bonded dopamine. Background technique [0002] The metallurgical industry produces a large amount of wastewater containing heavy metals in the process of metallurgical activities. Water pollution by heavy metals Pb and Cd has potential impacts on human health and poses a serious threat to ecosystems even at low concentrations due to the bioaccumulation and biomagnification of Pb and Cd. Effective removal of Pb and Cd from aqueous solutions has become a special concern in water treatment. Currently, a variety of treatment technologies and methods including membrane filtration, electrochemical techniques, ion exchange, chemical precipitation and adsorption methods have been successfully developed in the removal of toxic heavy metals and radionuclides from water. [0003] In recent years, inorganic po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F226/02C08F2/48C08J3/075B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20
CPCB01J20/261B01J20/28047C02F1/285C02F2101/20C08F2/48C08F220/06C08J3/075C08J2333/02C08F226/02
Inventor 张红平韦成刘来宝张礼华陈晓强张润
Owner SOUTHWEAT UNIV OF SCI & TECH
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