Polymer modified material for encapsulating microorganisms and its preparation method and application in n,n-dimethylformamide treatment

A technology for modifying materials and polymers, used in biological water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve problems such as low degradation efficiency and bacterial poisoning, achieve considerable adsorption performance, and avoid the loss of bacteria , the effect of low economic cost

Active Publication Date: 2020-05-08
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The biological method has the advantages of economy, environmental protection and sustainability, which has attracted people's attention. However, directly using bacteria to degrade high-concentration DMF will cause poisonous effects on bacteria, so the pure biological method has been limited in practice. However, in the actual process, Bacteria and DMF will disperse in solution making degradation inefficient

Method used

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  • Polymer modified material for encapsulating microorganisms and its preparation method and application in n,n-dimethylformamide treatment
  • Polymer modified material for encapsulating microorganisms and its preparation method and application in n,n-dimethylformamide treatment
  • Polymer modified material for encapsulating microorganisms and its preparation method and application in n,n-dimethylformamide treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Copper mesh pretreatment and model preparation. Specific steps are as follows:

[0032] First make the copper mesh into a bag model, then put it in water, ultrasonic for half a day, then put it in DMF for half a day, dry it in an oven and stick it into a bag model with a hot melt glue gun.

[0033] Preparation of graphene oxide. Specific steps are as follows:

[0034] Make a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid at a ratio of 9:1, then slowly add 1.5 graphite flakes, keep the temperature below 50°C, and react for 5 hours, then slowly pour the solution into ice water, Stir while adding, and finally add 30% hydrogen peroxide slowly until the solution turns bright yellow. Then wash by centrifugation with 5% hydrochloric acid and water.

[0035] Modification of graphene oxide. Specific steps are as follows:

[0036] In a round bottom flask, GO was dispersed in DMAC and triethylamine was added. The reaction system was carried ou...

Embodiment 2

[0050] First make the copper mesh into a bag model, then put it in water, ultrasonic for half a day, then put it in DMF for half a day, dry it in an oven and stick it into a bag model with a hot melt glue gun.

[0051] Make a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid at a ratio of 10:1, then slowly add 2g of graphite flakes, keep the temperature below 40°C, and react for 6 hours, then slowly pour the solution into ice water, Stir while adding, and finally add 35% hydrogen peroxide slowly until the solution turns bright yellow. Then centrifuge and wash with 10% hydrochloric acid and water to obtain graphene oxide.

[0052] In a round bottom flask, GO was dispersed in DMAC and triethylamine was added. The reaction system was carried out under the protection of vacuum and nitrogen, and then acryloyl chloride was slowly added thereto (ice-water bath), followed by overnight at room temperature for 30 hours, the product was washed with acetone, a...

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Abstract

The invention discloses a polymer modification material for wrapping microorganisms, its preparation method and its application in the treatment of N,N-dimethylformamide; adding graphene oxide into the amide, and then adding triethylamine; Under conditions, in a nitrogen environment, under an ice-water bath, add acid chloride; then react at room temperature for 20 to 24 hours to prepare pre-modified graphene oxide; disperse the pre-modified graphene oxide in DMF, add acrylic compound and methacrylic acid Ester compounds, using AIBN as an initiator to carry out polymerization reaction in a nitrogen environment to prepare modified graphene oxide; put the metal mesh into the solution of modified graphene oxide, and ultrasonically treat it to prepare polymer modified materials; put microorganisms into In the polymer modified material, a polymer modified material encapsulating microorganisms is prepared. In the present invention, wrapping the bacteria with the modified copper mesh can not only avoid the loss of the bacteria, but also enrich the concentration of DMF, so that the DMF can be degraded with high efficiency.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to a polymer modification material for encapsulating microorganisms, a preparation method thereof and an application in N,N-dimethylformamide treatment. Background technique [0002] With the development of social economy, environmental pollution problems emerge in an endless stream, causing people's attention. As a commonly used solvent, N,N-dimethylformamide (DMF) is widely used in laboratories and factories. Due to improper use and random discharge, it has a great impact on the environment and human life. Therefore, the use of DMF Processing is also increasing. Initially, the adsorption method attracted people's attention as a simple, direct, and effective treatment method. However, due to the need for desorption after the post-treatment, there will be secondary pollution, high cost, and low recycling rate. So looking for an economical and sustainable m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/06C08F220/18C02F3/34C02F101/38C02F1/28
CPCC02F1/285C02F3/34C08F292/00C02F2101/38C08F220/18C08F220/1804C08F220/1802
Inventor 路建美陈冬赟蒋军
Owner SUZHOU UNIV
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