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Preparation method and application of polyacrylic acid hydrogel mediator functional material modified by neutral red

A hydrogel mediator, polyacrylic acid technology, applied in chemical instruments and methods, water pollutants, biological water/sewage treatment, etc., can solve problems such as low yield, achieve good biocompatibility, and improve loading rate , the effect of high stability

Active Publication Date: 2018-10-12
TIANJIN CHENGJIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most mediators have poor water solubility, and due to the strong activity of water molecules, the side reactions participated by water molecules occupy a dominant position. Therefore, the yield of most synthetic reactions in water systems is extremely low.
Thus, studies on the chemical grafting of redox mediators in hydrogel systems have not been reported

Method used

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  • Preparation method and application of polyacrylic acid hydrogel mediator functional material modified by neutral red
  • Preparation method and application of polyacrylic acid hydrogel mediator functional material modified by neutral red
  • Preparation method and application of polyacrylic acid hydrogel mediator functional material modified by neutral red

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve 1.5 g of acrylic acid, 0.062 g of N,N-methylenebisacrylamide and 0.05 g of potassium persulfate in a mixture of 2 mL of ethanol and 17 mL of distilled water, heat in a water bath to 60 °C, and stir mechanically until a hydrogel is formed . Its hydrogelation time was 20 min, and the hydrogel swelling rate was 22.29.

[0019] Neutral red was branched on polyacrylic acid hydrogel through EDC condensation reaction. The specific operation steps are as follows: 400 mgEDC . HCl, 500 mg NHS and 500 mg neutral red were dissolved in 100 mL of distilled water to prepare a reaction solution, the gel was cut into small cubes and immersed in the reaction solution, and reacted at room temperature for 24 h. The reacted gel was washed three times with distilled water, soaked in distilled water, and the distilled water was replaced every 4 h until the distilled water was colorless and transparent, and continued to soak for 24 h to obtain the NR-PAaH functional material. The g...

Embodiment 2

[0027] Dissolve 1.5 g of acrylic acid, 0.09 g of N,N-methylenebisacrylamide and 0.05 g of potassium persulfate in a mixture of 2 mL of ethanol and 17 mL of distilled water, heat in a water bath to 50 °C, and stir mechanically until a hydrogel is formed . The gelation time of the hydrogel was 8 minutes, and the swelling rate of the hydrogel was 24.18.

[0028] Neutral red was branched on polyacrylic acid hydrogel through EDC condensation reaction. The specific operation steps are as follows: 400 mgEDC . HCl, 500 mg NHS and 500 mg neutral red were dissolved in 100 mL of distilled water to prepare a reaction solution, the gel was cut into small cubes and placed in the reaction solution, and reacted at room temperature for 24 h. The reacted gel was washed three times with distilled water, soaked in distilled water, and the distilled water was replaced every 4 h until the distilled water was colorless and transparent, and continued to soak for 24 h to obtain the NR-PAaH functiona...

Embodiment 3

[0034] Dissolve 1.5 g of acrylic acid, 0.062 g of N,N-methylenebisacrylamide and 0.05 g of sodium persulfate in a mixture of 2 mL of ethanol and 17 mL of distilled water, heat in a water bath to 50 °C, and stir mechanically until a hydrogel is formed. The gelation time of the hydrogel was 20 min, and the swelling ratio of the hydrogel was 22.29.

[0035] Neutral red was branched on polyacrylic acid hydrogel through EDC condensation reaction. The specific operation steps are as follows: 400 mgEDC . HCl, 400 mg NHS and 500 mg neutral red were dissolved in 100 mL of distilled water to prepare a reaction solution, the gel was cut into small cubes and placed in the reaction solution, and reacted at room temperature for 24 h. Wash the reacted gel three times with distilled water, soak it in distilled water, and replace the distilled water every 4 hours until the distilled water is colorless and transparent, so that the neutral red adsorbed on the hydrogel can be washed off, and con...

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Abstract

The invention discloses a preparation method and application of neutral red modified polyacrylic acid hydrogel mediator functional material, which includes the preparation of polyacrylic acid hydrogel and neutral red grafting reaction, and specifically includes the following steps: A , use acrylic acid as the monomer, N,N-methylene bisacrylamide as the cross-linking agent, and potassium persulfate as the initiator, and react at 30~80°C to generate polyacrylic acid hydrogel; B. Weigh 1- (3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, N-hydroxysuccinimide and neutral red were prepared as a mixture, and the polyacrylic acid hydrogel prepared in step A was placed In the mixed solution, react at 10-50°C for 24 hours to obtain a crude neutral red-modified polyacrylic acid hydrogel. The polyacrylic acid hydrogel carrier material in the present invention has a large specific surface area, which is conducive to increasing the loading rate of non-quinone mediators, thereby achieving high-performance biocatalytic efficiency.

Description

technical field [0001] The invention belongs to the field of functional materials for environmental treatment, and in particular relates to a preparation method and application of neutral red-modified polyacrylic acid hydrogel mediator functional materials. Background technique [0002] With the continuous and rapid growth of my country's economy, the consumption of water resources has increased significantly, making the problem of water environmental pollution increasingly serious, and the discharge of wastewater from the textile printing and dyeing industry is one of the main sources of water pollution. Azo dyes are typical pollution in textile wastewater After it is discharged into the river, it not only affects the color and turbidity of the river water, but also causes water pollution and affects human health. Due to the characteristics of difficult biodegradation and poor effect of traditional biological treatment methods, the effective treatment of azo dyes has become ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F222/38C08F8/32B01J31/06B01J35/10C02F3/34C02F101/38
CPCC02F3/34C08F8/32C08F220/06B01J31/06C02F2101/308C02F2101/38B01J35/23B01J35/61C08F222/385
Inventor 郭建博杨丹逯彩彩宋圆圆李海波
Owner TIANJIN CHENGJIAN UNIV
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