Antibacterial oil-water separation nanometer aerogel composite as well as preparation method and application thereof

A nano-aerogel and composite material technology is applied in the field of nano-aerogel composite materials for antibacterial oil-water separation and its preparation, which can solve the problems of loss of adsorption capacity, collapse of structure, and limited application of aerogels, and achieve a simple and convenient operation method. , The effect of short reaction time and few types of raw materials

Active Publication Date: 2019-06-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, nanocrystalline cellulose itself has no bactericidal effect, and even because of the porous properties of the airgel adsorption material prepared by it, it provides a surface for bacteria to attach to, making it easier for bacteria to grow and reproduce under humid conditions
In addition, the strong hydrophi

Method used

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  • Antibacterial oil-water separation nanometer aerogel composite as well as preparation method and application thereof
  • Antibacterial oil-water separation nanometer aerogel composite as well as preparation method and application thereof
  • Antibacterial oil-water separation nanometer aerogel composite as well as preparation method and application thereof

Examples

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Example Embodiment

[0032] Example 1

[0033] An antibacterial oil-water separation nano aerogel composite material, and its preparation method includes the following steps:

[0034] (1) Add 1 g of nanocrystalline cellulose to 100 g of deionized aqueous solution, and ultrasonically disperse it into a uniform suspension with a mass fraction of 1 wt%, which is used as phase A;

[0035] (2) Dissolve 2g of cyanuric chloride, the precursor of haloamine antibacterial agent, in 10ml of ethanol as phase B;

[0036] (3) Adjust the pH of phase A to 8 with sodium bicarbonate solution at 0-5°C, slowly add phase B to phase A dropwise, continue to stir, react for 1 hour, after the reaction is over, put the resulting solution at 10000rpm Centrifuge for 10 min, and wash the obtained precipitate with deionized water three times. After dispersing the product in water, it is dialyzed to neutral with an 8000 molecular weight dialysis bag, and then concentrated to a concentration of 2wt%, which is used as phase C;

[0037] (4...

Example Embodiment

[0038] Example 2

[0039] An antibacterial oil-water separation nano aerogel composite material, and its preparation method includes the following steps:

[0040] (1) Add 3g of nanocrystalline cellulose to 100g of deionized aqueous solution, and ultrasonically disperse it into a homogeneous suspension with a mass fraction of 3wt%, which is used as phase A;

[0041] (2) Dissolve 4.5g of cyanuric chloride, the precursor of haloamine antibacterial agent, in 22.5ml of acetone, as phase B;

[0042] (3) Adjust the pH of phase A to 9 with sodium carbonate solution at 0-5°C, slowly add phase B to phase A dropwise, continue to stir, react for 2h, after the reaction is over, centrifuge the resulting solution at 10000rpm After 10 minutes, the obtained precipitate was washed three times with deionized water. After the product was dispersed in water, it was dialyzed to neutrality with an 8000 molecular weight dialysis bag, and then concentrated to a concentration of 4wt%, which was used as phase C...

Example Embodiment

[0044] Example 3

[0045] An antibacterial oil-water separation nano aerogel composite material, and its preparation method includes the following steps:

[0046] (1) Add 6 g of nanocrystalline cellulose to 100 g of deionized aqueous solution, and ultrasonically disperse it into a homogeneous suspension with a mass fraction of 6 wt%, which is used as phase A;

[0047] (2) Dissolve 6g of cyanuric chloride, the precursor of haloamine antibacterial agent, in 10ml of ethanol as phase B;

[0048] (3) Adjust the pH of phase A to 10 with sodium hydroxide solution at 0-5°C, slowly drip phase B into phase A, continue stirring, and react for 3.5 hours. After the reaction, the obtained solution was centrifuged at 10000 rpm for 10 min, and the obtained precipitate was washed three times with deionized water. After the product was dispersed in water, it was dialyzed to neutrality with an 8000 molecular weight dialysis bag, and then concentrated to a concentration of 6 wt%. As phase C;

[0049] (4)...

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Abstract

The invention discloses an antibacterial oil-water separation nanometer aerogel composite. A preparation method of the composite comprises the following steps: (1) dispersing nanocrystalline celluloseinto deionized water to prepare a phase A; (2) dissolving cyanuric chloride into an organic solvent to prepare a phase B; (3) slowly and dropwise adding the phase B into the phase A, carrying out a reaction under a mechanical stirring condition, continuously and dropwise adding an alkaline solution to keep the pH value constant, ending the reaction to prepare an antibacterial nanocrystalline cellulose suspension, and then, carrying out concentration to prepare a phase C; and (4) adding a siloxane compound into the phase C to carry out a reaction, ending the reaction, standing the reaction solution, and carrying out freeze-drying and chlorinating to prepare the antibacterial oil-water separation nanometer aerogel composite. The composite disclosed by the invention not only has an antibacterial function, but also has a selective oil-water separation function so as to have very important significance.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a nano airgel composite material for antibacterial oil-water separation and its preparation method and application. Background technique [0002] With rapid industrial development and current population growth, water resources are becoming scarce. Among them, oily wastewater is one of the problems. Wastewater also includes various toxic substances and various pathogens such as Escherichia coli that are extremely harmful to humans. The discharge of untreated oily wastewater into the environment creates serious ecological problems. In this context, researchers are working on the development of antimicrobial and adsorbent materials. [0003] As a natural material, nanocrystalline cellulose has become the focus of research work due to its abundant sources, high crystallinity, high strength, good biocompatibility, degradability and regeneration under natural conditions....

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J20/24B01J20/30B01J20/28C02F1/28C02F1/40C02F1/50A01N43/66A01P3/00A01P1/00C02F101/30
Inventor 任学宏张艳范冰杰吕长辉李霞刘颖
Owner JIANGNAN UNIV
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