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Nanocrystalline cellulose/g-C3N4/polyacrylamide composite hydrogel as well as preparation method and application thereof

A technology of nanocellulose and polyacrylamide, applied in water/sludge/sewage treatment, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve hydrogel application limitations, mechanical Poor performance and other problems, achieve good photodegradation performance, enhance mechanical properties, and facilitate recycling

Active Publication Date: 2022-05-10
RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional chemical cross-linking methods usually use toxic reagents such as ammonium persulfate and potassium persulfate as initiators, which limits the application of hydrogels
And most hydrogels suffer from poor mechanical properties

Method used

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  • Nanocrystalline cellulose/g-C3N4/polyacrylamide composite hydrogel as well as preparation method and application thereof
  • Nanocrystalline cellulose/g-C3N4/polyacrylamide composite hydrogel as well as preparation method and application thereof
  • Nanocrystalline cellulose/g-C3N4/polyacrylamide composite hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1. Weigh 0.05g of CNC into a 50ml beaker, add 10ml of ultrapure water, ultrasonicate for 5min to disperse the CNC uniformly, add 0.02g of MBA, continue to ultrasonicate for 5min to dissolve the MBA to obtain a suspension;

[0038] Step 2. Then add 0.001gg-C 3 N 4 Solution in suspension, homogenize at 12000r / min for 15min to make g-C 3 N 4 After uniform dispersion, 1.0 g AM was added, homogenized for 5 minutes, and then sonicated for 10 minutes to obtain a mixed solution;

[0039] Step 3. After illuminating the mixed solution under a 150W xenon lamp for 5 hours, a uniformly formed hydrogel was obtained, and then freeze-dried for 48 hours to obtain nanocellulose / g-C 3 N 4 / polyacrylamide composite hydrogel, denoted as Gel1.

Embodiment 2

[0041] Step 1. Weigh 0.05g of CNC into a 50ml beaker, add 10ml of ultrapure water, ultrasonicate for 5min to disperse the CNC uniformly, add 0.02g of MBA, continue to ultrasonicate for 5min to dissolve the MBA to obtain a suspension;

[0042] Step 2, then add 0.005gg-C 3 N 4 Solution in suspension, homogenize at 12000r / min for 15min to make g-C 3 N 4 After uniform dispersion, 1.0 g AM was added, homogenized for 5 minutes, and then sonicated for 10 minutes to obtain a mixed solution;

[0043] Step 3. After illuminating the mixed solution under a 150W xenon lamp for 5 hours, a uniformly formed hydrogel was obtained, and then freeze-dried for 48 hours to obtain nanocellulose / g-C 3 N 4 / polyacrylamide composite hydrogel, denoted as Gel2.

Embodiment 3

[0045] Step 1. Weigh 0.05g of CNC into a 50ml beaker, add 10ml of ultrapure water, ultrasonicate for 5min to disperse the CNC uniformly, add 0.02g of MBA, continue to ultrasonicate for 5min to dissolve the MBA to obtain a suspension;

[0046] Step 2, then add 0.01gg-C 3 N 4 Solution in suspension, homogenize at 12000r / min for 15min to make g-C 3 N 4 After uniform dispersion, 1.0 g AM was added, homogenized for 5 minutes, and then sonicated for 10 minutes to obtain a mixed solution;

[0047] Step 3. After illuminating the mixed solution under a 150W xenon lamp for 5 hours, a uniformly formed hydrogel was obtained, and then freeze-dried for 48 hours to obtain nanocellulose / g-C 3 N 4 / polyacrylamide composite hydrogel, denoted as Gel3.

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Abstract

The invention discloses nanocellulose / g-C3N4 / polyacrylamide composite hydrogel as well as a preparation method and application thereof, and belongs to the technical field of polymer composite materials. The preparation method comprises the following steps: under the driving of visible light, taking g-C3N4 as an initiator, taking a cellulose nanocrystal as a reinforcement body, and carrying out free radical polymerization reaction on acrylamide and N, N-methylene bisacrylamide, so as to prepare the nanocellulose / g-C3N4 / polyacrylamide composite hydrogel. The prepared CNC / g-C3N4 / PAM composite hydrogel has the advantages of being good in photodegradation performance, high in adsorption load, strong in mechanical property, convenient to recycle and the like.

Description

technical field [0001] The invention relates to the technical field of polymer composite materials, and more particularly to nanocellulose / g-C 3 N 4 / polyacrylamide composite hydrogel and its preparation method and application. Background technique [0002] In recent years, with the development of various industries, especially the printing and dyeing industry, the problem of wastewater treatment has attracted attention. The discharge of a large amount of printing and dyeing wastewater has caused serious water pollution, so how to efficiently remove organic pollutants in water has become the focus of research on water pollution control today. [0003] Photocatalytic technology uses semiconductors as catalysts and natural light as energy to mineralize organic matter to CO 2 and H 2 O, can reduce energy consumption, and has the advantages of good decolorization effect and simple operation process. It is a green and efficient organic dye degradation technology. Graphitic c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/26C08L1/02C08K3/28C08F220/56C08F222/38C08F2/48C08J3/075B01J31/06B01J27/24C02F1/30
CPCC08J3/075C08F220/56C08F2/48B01J31/06B01J27/24C02F1/30C02F2305/10C02F2101/308C08J2333/26C08J2401/02B01J35/39B01J35/23C08F222/385Y02W10/37
Inventor 孙晓锋谢洋洋张涛李文博李宇丹
Owner RES & DEV INST OF NORTHWESTERN POLYTECHNICAL UNIV IN SHENZHEN
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