Direct drinking water treatment membrane containing graphene micro-sheet as well as preparation method thereof

A technology of graphene microchips and treatment membranes, applied in the direction of adsorption water/sewage treatment, permeation/dialysis water/sewage treatment, general water supply conservation, etc., can solve the problems of weakened adsorption effect and difficulty in retaining the specific surface area of ​​graphene, etc., to achieve Guarantee the safety of drinking water, the effect of excellent adsorption and purification ability

Inactive Publication Date: 2018-11-06
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that the conventional process of using graphene for direct drinking water treatment in the prior art mostly mixes graphene directly with reverse osmosis membranes for direct dispersion, which makes it difficult to retain the high specific surface area of ​​graphene, resulting in disadvantages such as weakened adsorption effect

Method used

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  • Direct drinking water treatment membrane containing graphene micro-sheet as well as preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 26kg of m-phenylenediamine and 74kg of water are made into water phase solution, 34kg of trimesoyl chloride and 66kg of toluene are made into oil phase solution; then a porous ceramic substrate with a porosity of 66% and an average pore diameter of 120nm is laid on the platform Then immerse it in the water phase solution containing m-phenylenediamine, take it out after 13min, immerse it in the oil phase solution, take it out after the reaction is completed, remove the excess solvent, and get the treatment film in the initial state; coat the surface of the treatment film in the initial state Polyacrylamide adhesive, and then through the spray nozzle with a pore size of 30 μm, the graphene microflakes with 13 carbon layers and an average thickness of 22 nm are sprayed out at a spray pressure of 50 kg / cm, deposited on the coating surface, and the spraying process is repeated; A laser with a power of 33MW was used to rapidly heat and dry for 7s, and after solidification, a m...

Embodiment 2

[0036] 20kg of m-phenylenediamine and 80kg of water are made into water phase solution, 30kg of trimesoyl chloride and 70kg of xylene are made into oil phase solution; then a porous ceramic with a porosity of 60% and an average pore size of 50nm is laid on the platform Then immerse the substrate in the aqueous phase solution containing m-phenylenediamine, take it out after 10min, and immerse it in the oil phase solution, take it out after the reaction is completed, remove the excess solvent, and obtain the treatment film in the initial state; coat the surface of the treatment film in the initial state Cover with polyacrylamide adhesive, and then spray graphene microflakes with 10 carbon layers and an average thickness of 10nm through a nozzle with a pore size of 20 μm at a spray pressure of 30kg / cm, deposit on the coating surface, and repeat the spraying process ; Utilize a laser with a power of 20MW to quickly heat and dry for 10s, and obtain a direct drinking water treatment ...

Embodiment 3

[0039] 22kg of m-phenylenediamine and 78kg of water are made into water phase solution, 33kg of trimesoyl chloride and 67kg of trimethylbenzene are made into oil phase solution; then a porous ceramic with a porosity of 62% and an average pore size of 100nm is laid on the platform Then immerse the substrate in the water phase solution containing m-phenylenediamine, take it out after 11 minutes, immerse it in the oil phase solution, take it out after the reaction is completed, remove the excess solvent, and obtain the treatment film in the initial state; coat the surface of the treatment film in the initial state Cover with polyacrylamide adhesive, and then spray graphene microflakes with 11 carbon layers and an average thickness of 15nm through a nozzle with a pore size of 25 μm at a spray pressure of 40kg / cm, deposit on the coating surface, and repeat the spraying process ;Use a laser with a power of 25MW to quickly heat and dry for 9s, and obtain a direct drinking water treatm...

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Abstract

The invention belongs to the technical field of a water treatment membrane and provides a direct drinking water treatment membrane containing a graphene micro-sheet as well as a preparation method thereof. The method comprises the following steps: performing interfacial polymerization on the surface of a porous ceramic substrate through m-phenylenediamine and trimesoyl chloride to generate a polyamide desalination layer, sequentially coating a polyacrylamide adhesive, depositing the graphene micro-sheet, coating the polyacrylamide adhesive and depositing the graphene micro-sheet, and performing laser drying and curing to prepare the direct drinking water treatment membrane. Compared with the traditional method, the preparation method has the following advantages: in the direct drinking water treatment membrane prepared by the method, the graphene micro-sheet is fixed on the treatment membrane in an initial state by the polyacrylamide adhesive, so that high specific surface area and excellent adsorbing and purifying capabilities of the graphene micro-sheet are guaranteed; and when the direct drinking water treatment membrane is applied treatment of direct drinking water, each layerof the treatment membrane with a multi-layer composite structure is synergistically purified and adsorbed, and a large amount of nanoscale impurities in the water can be adsorbed, so that drinking water safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of water treatment membranes, and provides a direct drinking water treatment membrane containing graphene microchips and a preparation method thereof. Background technique [0002] Direct drinking water, also known as healthy running water, refers to water that can be directly drunk without pollution, without degradation, in line with the physiological needs of the human body (containing beneficial mineral elements similar to the human body), and with a weakly alkaline pH value. Direct drinking water is generally treated with urban tap water as the raw water for deep purification, with micro-polluted toxic and harmful substances and organic pollutants in urban tap water and secondary pollutants in the water delivery system as the main removal targets. [0003] At present, the deep purification of direct drinking water mainly uses membrane technology as the core process, which usually includes pretreatment, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D71/02B01D69/12B01D67/00C02F1/44C02F1/28
CPCB01D67/0079B01D69/125B01D71/02B01D71/021B01D71/56C02F1/28C02F1/44Y02A20/131
Inventor 陈庆昝航
Owner CHENDU NEW KELI CHEM SCI CO LTD
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