A method for preparing polycarbonate/graphene superhydrophobic porous membrane by 3D printing

A polycarbonate, 3D printing technology, applied in the direction of separation methods, chemical instruments and methods, membranes, etc., can solve the problems of poor mechanical stability of porous membranes, difficulty in controlling the formation of membrane pores, and the need to improve hydrophobicity, so as to improve compatibility Sexuality, uniform and orderly distribution, and the effect of improving mechanical strength and deformability

Active Publication Date: 2020-09-11
黄素环
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mechanical stability of the porous membrane prepared by this invention is poor, and the hydrophobicity needs to be improved
[0007] To sum up, the superhydrophobic porous membranes in the prior art have the disadvantages that the formation of membrane pores is difficult to control, the uniformity is poor, and the deformation ability of the membrane material is weak, the mechanical stability is poor, and the hydrophobicity needs to be improved. Therefore, a preparation with excellent comprehensive performance is developed The method of superhydrophobic porous membrane has important significance

Method used

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  • A method for preparing polycarbonate/graphene superhydrophobic porous membrane by 3D printing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add graphene powder and cross-linking agent into deionized water, disperse evenly, then place in a closed container, pass fluorine gas under high temperature and stirring state, cool and discharge the material after the reaction is completed, and obtain fluorinated graphene Hydrogel; the crosslinking agent is ethylenediamine; the parts by weight of each raw material are 16 parts by weight of graphene powder, 2 parts by weight of crosslinking agent, 75 parts by weight of deionized water, and 7 parts by weight of fluorine gas;

[0035] (2) Vacuum freeze-dry the hydrogel prepared in step (1) to obtain airgel, and then grind it into a powder with an average particle size of 90nm to obtain fluorinated graphene airgel powder; the vacuum freeze-dried The temperature is 5Pa, the temperature is -46℃, and the time is 25h;

[0036] (3) Heat the polycarbonate to melt, add the fluorinated graphene airgel powder, antioxidant and lubricant prepared in step (2), disperse evenly, an...

Embodiment 2

[0040] (1) Add graphene powder and cross-linking agent into deionized water, disperse evenly, then place in a closed container, pass fluorine gas under high temperature and stirring state, cool and discharge the material after the reaction is completed, and obtain fluorinated graphene Hydrogel; the crosslinking agent is polyethyleneimine; the parts by weight of each raw material are 13 parts by weight of graphene powder, 1 part by weight of crosslinking agent, 80 parts by weight of deionized water, and 6 parts by weight of fluorine gas;

[0041] (2) Vacuum freeze-dry the hydrogel prepared in step (1) to obtain airgel, and then grind it into a powder with an average particle size of 100nm to obtain fluorinated graphene airgel powder; the vacuum freeze-dried The temperature is 5Pa, the temperature is -42℃, and the time is 27h;

[0042] (3) Heat the polycarbonate to melt, add the fluorinated graphene airgel powder, antioxidant and lubricant prepared in step (2), disperse evenly, ...

Embodiment 3

[0046] (1) Add graphene powder and cross-linking agent into deionized water, disperse evenly, then place in a closed container, pass fluorine gas under high temperature and stirring state, cool and discharge the material after the reaction is completed, and obtain fluorinated graphene Hydrogel; cross-linking agent is polydiallyl dimethyl ammonium chloride; parts by weight of each raw material are 16 parts by weight of graphene powder, 3 parts by weight of cross-linking agent, 73 parts by weight of deionized water, fluorine gas 8 parts by weight;

[0047] (2) Vacuum freeze-dry the hydrogel prepared in step (1) to obtain airgel, and then grind it into a powder with an average particle size of 80nm to obtain fluorinated graphene airgel powder; the vacuum freeze-dried The temperature is 5Pa, the temperature is -42℃, and the time is 25h;

[0048] (3) Heat the polycarbonate to melt, add the fluorinated graphene airgel powder, antioxidant and lubricant prepared in step (2), disperse...

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Abstract

The invention belongs to the technical field of superhydrophobic materials and provides a method for preparing a polycarbonate / graphene superhydrophobic porous membrane by 3D printing. The method comprises the following steps: preparing fluorinated graphene aerogel, performing grinding and crushing, adding powder, an antioxidant and a lubricant to molten polycarbonate, uniformly mixing the mixture, and performing 3D printing according to set parameters to obtain a porous membrane with a submicron rough surface; further modifying the surface of the membrane with vinyl to prepare the polycarbonate / graphene superhydrophobic porous membrane. Compared with the traditional method, the porous membrane adopts a 3D printing rapid forming technology which has simple and easy-to-control process, andthe membrane has uniform and orderly membrane pores, good mechanical stability, high deformation capability and excellent superhydrophobic performance, thereby having broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of superhydrophobic materials, and provides a method for preparing polycarbonate / graphene superhydrophobic porous membranes by 3D printing. Background technique [0002] Superhydrophobic materials refer to materials whose surface contact angle with water is greater than 150° and the rolling angle is less than 10°. There are two main ways to construct superhydrophobic surfaces: modifying low surface energy substances on the surface with micro-nano rough structure; The surface of the material with low surface energy has a micro-nano rough structure. Superhydrophobic materials can be used in self-cleaning, anti-fog, anti-icing, drag reduction and oil-water separation and other fields. [0003] At present, the widely used superhydrophobic materials are mainly divided into superhydrophobic separation mesh materials and superhydrophobic three-dimensional porous adsorption materials. Among them, the substrates of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/50B01D67/00B01D17/022B01D17/02
CPCB01D17/02B01D17/085B01D67/0079B01D71/50B01D2323/04B01D2325/38
Inventor 蔡露
Owner 黄素环
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