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Preparation method of graphene composite PP filter membrane

A graphene composite and filtration membrane technology, applied in the field of water purification filter materials, can solve the problems of reducing membrane filtration effect and pollution, achieve good filtration effect, enhance service life, and excellent adsorption function

Pending Publication Date: 2020-08-14
NANTONG QIANGSHENG GRAPHENE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the smearing method prevents the graphene and the polypropylene film from being completely bonded together, especially in the process of passing water, the impact of the water flow will cause the graphene coating to peel off, and enter the water to cause pollution or reduce the film’s durability. filter effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The present embodiment relates to a kind of preparation method of graphene composite PP filter membrane; Concrete operation steps are as follows:

[0030] Step 1. Prepare raw materials: prepare graphene powder, the selected graphene single-layer ratio exceeds 95%, the single-layer thickness is 0.335nm, and the sheet thickness is 5nm. The preparation method of graphene involves redox method, mechanical exfoliation method, One or more of liquid phase stripping, low pressure chemical vapor deposition and atmospheric pressure chemical vapor deposition;

[0031] Step 2: Prepare the masterbatch, mix the graphene powder and the polypropylene white chip according to the weight ratio of 8:100, pour it into the screw extruder, set the temperature of the screw extruder to 160°C, and the speed to 80r / min, extrusion granulation makes stone graphene composite PP masterbatch;

[0032] Step 3, composite: mix the graphene composite PP masterbatch prepared in step 2 with additives and ...

Embodiment 2

[0036] The present embodiment relates to a kind of preparation method of graphene composite PP filter membrane; Concrete operation steps are as follows:

[0037] Step 1. Prepare raw materials: prepare graphene powder, the selected graphene single-layer ratio exceeds 95%, the single-layer thickness is 0.335nm, and the sheet thickness is 0.1nm. The preparation method of graphene involves redox method and mechanical exfoliation method , one or more of liquid phase stripping, low pressure chemical vapor deposition and atmospheric pressure chemical vapor deposition;

[0038] Step 2: Prepare the masterbatch, mix the graphene powder and the polypropylene white chip according to the weight ratio of 5:100, pour it into the screw extruder, set the temperature of the screw extruder to 140°C, and the speed to 60r / min, extrusion granulation makes stone graphene composite PP masterbatch;

[0039] Step 3, composite: mix the graphene composite PP masterbatch prepared in step 2 with additive...

Embodiment 3

[0043] The present embodiment relates to a kind of preparation method of graphene composite PP filter membrane; Concrete operation steps are as follows:

[0044] Step 1. Prepare raw materials: prepare graphene powder, the selected graphene monolayer ratio exceeds 95%, the monolayer thickness is 0.335nm, and the sheet thickness is 10nm. The preparation method of graphene involves redox method, mechanical exfoliation method, One or more of liquid phase stripping, low pressure chemical vapor deposition and atmospheric pressure chemical vapor deposition;

[0045] Step 2: Prepare the masterbatch, mix the graphene powder and the polypropylene white chip according to the weight ratio of 10:100, pour it into the screw extruder, set the temperature of the screw extruder to 180°C, and the speed to 100r / min, extrusion granulation makes stone graphene composite PP masterbatch;

[0046] Step 3, composite: the graphene composite PP masterbatch prepared in step 2 is mixed with additives an...

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Abstract

The invention discloses a preparation method of a graphene composite PP filter membrane. The preparation method comprises the following steps: firstly, grafting and compounding graphene and polypropylene to prepare graphene composite PP master batch, then adding the master batch and an additive into a polypropylene melt extruder to prepare a graphene composite PP single-layer membrane, and superposing and hot-pressing the membranes to prepare the graphene composite PP filter membrane. Compared with a common membrane, the graphene composite PP membrane has the advantages that the pore diameteris small, the adsorption performance is just good, impurities in water can be effectively blocked, and a good filtering effect is achieved.

Description

technical field [0001] The invention relates to the field of water purification filter materials, in particular to a preparation method of a graphene composite PP filter membrane. Background technique [0002] Filter membrane is a kind of material for solid-liquid separation. According to different raw materials, it can be divided into PP filter membrane, PVC filter membrane, PVDF filter membrane, PAN filter membrane, PES filter membrane, etc. The principle of membrane filtration is to use the many uniform micropores on its surface to trap impurities in water to achieve filtration. Generally, there is no chemical change in this process. According to the size of the micropores on the membrane surface, it is divided into nanofiltration membrane, ultrafiltration membrane, reverse osmosis membrane and so on. [0003] Polypropylene (PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to various organic solvents an...

Claims

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Application Information

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IPC IPC(8): B01D71/26B01D67/00B01D69/02C02F1/44
CPCB01D71/26B01D67/0002B01D69/02C02F1/44
Inventor 沙嫣沙晓林
Owner NANTONG QIANGSHENG GRAPHENE TECH CO LTD
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