Preparation method of non-dissolving antibacterial polyquaternium modified active carbon

A polyquaternary ammonium salt and activated carbon technology is applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, adsorbed water/sewage treatment, etc. The raw materials are easily available and the effect of good antibacterial effect

Inactive Publication Date: 2012-11-21
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the antibacterial activated carbon prepared by the above methods has good antibacterial properties, metals such as gold, silver, and copper are expensive and scarce.

Method used

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  • Preparation method of non-dissolving antibacterial polyquaternium modified active carbon
  • Preparation method of non-dissolving antibacterial polyquaternium modified active carbon
  • Preparation method of non-dissolving antibacterial polyquaternium modified active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This example is the preparation of 3-(trimethoxysilyl) C-grade cetyl dimethyl ammonium chloride, and the reaction formula is as follows:

[0025]

[0026] Weigh 12.03g (0.06mol) of 3-chloropropyl-trimethoxysilane, 8.15g (0.03mol) of hexadecyldimethyl tertiary amine, add 21.93g (0.3mol) of N,N-dimethylformaldehyde Amide (DMF), filled with nitrogen protection, stirred and reacted at 110°C for 28-30h, and the reactants were removed by rotary evaporation to remove the solvent and excess reactants to obtain 3-(trimethoxysilyl) C-decadeca with a content of 96%. Hexaalkyldimethylammonium chloride, the crude product was purified by acetone to obtain a pure product, the elemental analysis test value: C / %61.45 (61.56), N / %2.98 (2.99)H / %11.63 (11.62) (in brackets is theoretical value); m / z 432.30; IR(KBr cm -1 ): 3430.86, 2921.05, 2851.13, 1195.30, 1076.42.

[0027] Methanol, ethanol, propanol can be used instead of DMF, or mixed solution of methanol and DMF, the reaction res...

Embodiment 2

[0029] This example is the on-site polymerization reaction of 3-(trimethoxysilyl) C-grade cetyl dimethyl ammonium chloride on activated carbon.

[0030] Weigh 0.2g of quaternary ammonium salt into a 250ml conical flask with stopper, add 38ml of deionized water, after ultrasonic dissolution, add 4g of activated carbon, shake at room temperature for 30min, add 2ml of 4mol / L hydrochloric acid solution, adjust the hydrochloric acid solution The concentration is 0.2mol / L, placed in a constant temperature shaking water tank at 50°C for 6 hours, after the reaction is completed, wash with deionized water until the solution is clear, and dry in a blast drying oven at 80°C for 2 hours to obtain modified activated carbon. Loading 1.07×10 per gram of activated carbon -4 mol quaternary ammonium salt.

Embodiment 3

[0032] This example is the on-site polymerization reaction of 3-(trimethoxysilyl) C-grade cetyl dimethyl ammonium chloride on activated carbon.

[0033] In the experiment, 0.1g of quaternary ammonium salt was weighed and added to a 250ml conical flask with a stopper, 47.5ml of deionized water was added, after ultrasonic dissolution, 5g of activated carbon was added, and after shaking at room temperature for 30min, 2.5ml of 4mol / L hydrochloric acid solution was added. Adjust the concentration of the solution to 0.2 mol / L and place it in a 50°C constant temperature shaking water tank for 6 hours of reaction. After the reaction is complete, wash it with deionized water until the solution is clear, and dry it in an 80°C blast drying oven for 2 hours to prepare modified activated carbon. The loading per gram of activated carbon is 4.29×10 -5 mol quaternary ammonium salt.

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Abstract

Active carbon (AC) which has a super-large specific surface area and a super-strong adsorption capability is widely applied to routine treatment and deep treatment of water, especially the removal of organic pollutants from water, but the active carbon absorbing the organic pollutants becomes a hotbed for the growth and the breeding of microbes, so the microbes in the treatment water exceed standards. The preparation method enables non-dissolving antibacterial polyquaternium modified active carbon harmless to the environment to be prepared through adopting the AC as a carrier and through the onsite polymerization of a siloxane quaternary ammonium salt monomer compound on the surface of the AC. The surface of the polyquaternium modified active carbon has positive charges, so the polyquaternium modified active carbon has strong bacteriostatic and antibacterial efficacies, and can be widely applied to the purification and disinfection treatment of various water.

Description

technical field [0001] The invention relates to a modification method and application of a quaternary ammonium salt on the surface of activated carbon. Specifically relates to an on-site polymerization method of quaternary ammonium salt siloxane monomer compound on the surface of activated carbon and the application of quaternary ammonium salt modified activated carbon in water treatment. Background technique [0002] Activated carbon (AC) has been widely used in routine and advanced treatment of water. Due to the super adsorption capacity of activated carbon itself, it has become one of the most mature and effective methods for removing organic pollutants in water. The Water Quality Association has recognized activated carbon filtration as an effective means of keeping certain contaminants in drinking water below national drinking water standards set by the U.S. Environmental Protection Agency (EPA). However, activated carbon also has an unsolvable problem in water treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/20B01J20/30C02F1/28C02F1/50
Inventor 梁杰焦玉超张冰亢真真
Owner SHANGHAI NORMAL UNIVERSITY
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