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A kind of cnts/psma/fluorocarbon surfactant composite material and preparation method thereof for oil-water separation

A fluorocarbon surface, composite material technology, applied in semi-permeable membrane separation, chemical instruments and methods, membranes, etc., can solve the problems of high membrane strength requirements, cumbersome separation process, membrane pollution by oil, etc., to improve anti-fouling performance, huge application prospects, the effect of increasing mechanical strength

Active Publication Date: 2021-09-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional oil-water separation materials such as organoclay, zeolite, polypropylene non-woven fabric, etc. will absorb water while absorbing oil, making the separation process cumbersome and inefficient; membrane materials with lipophilic and hydrophobic properties will cause membrane coating during use Reduced separation efficiency due to oil contamination
When treating oily sewage, the strength of the membrane is generally high. When a single polymer membrane or nanofiber membrane is used as a separation material, there are generally problems such as poor mechanical properties, hydrophobic surface, and weak anti-fouling properties. It is used for oil-water separation. An excellent membrane material should have good hydrophilicity and oleophobicity

Method used

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  • A kind of cnts/psma/fluorocarbon surfactant composite material and preparation method thereof for oil-water separation
  • A kind of cnts/psma/fluorocarbon surfactant composite material and preparation method thereof for oil-water separation
  • A kind of cnts/psma/fluorocarbon surfactant composite material and preparation method thereof for oil-water separation

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A CNTs / PSMA / fluorocarbon surfactant composite material for oil-water separation, which is to graft PSMA on the surface of acidified CNTs, and then self-assemble and molecular rearrangement with fluorocarbon surfactant FS-510 at the interface Composite obtained. The mass ratio of acidified CNTs to PSMA is 0.005:1; the diameter of carbon nanotubes is 40-60nm and the length is 5μm-10μm; the mass ratio of fluorocarbon surfactant FS-510 to CNTs / PSMA is 1:1; The relative molecular mass is 30,000 to 90,000.

[0031] In the preparation method of the above CNTs / PSMA / fluorocarbon surfactant composite material, a layer of PSMA is grafted on the surface of carbon nanotubes by in-situ polymerization, and the specific steps are as follows:

[0032] 1) Pour 1g of carbon nanotubes into a mixed acid solution of 50ml of 68% concentrated nitric acid and 150ml of 98% concentrated sulfuric acid, sonicate for two hours and then reflux at 75°C for 3 hours, filter and dry to obtain acidified ...

Embodiment 2

[0043]A CNTs / PSMA / fluorocarbon surfactant composite material for oil-water separation, which grafts PSMA on the surface of acidified carbon nanotubes through in-situ polymerization, and then combines with fluorocarbon surfactant FS-51 through intermolecular static Electricity and other self-assembled composites are obtained. The mass ratio of acidified carbon nanotubes to PSMA is 0.008:1; the diameter of carbon nanotubes is 30-50nm and the length is 7μm-10μm; the mass ratio of fluorocarbon surfactant FS-51 to CNTs / PSMA is 1.2:2; The relative molecular mass of PSMA is 100,000-150,000.

[0044] The preparation method of the above-mentioned CNTs / PSMA / FCS composite material for oil-water separation involves grafting a layer of PSMA on the surface of carbon nanotubes by in-situ polymerization, and the specific steps are as follows:

[0045] 1) Pour 1 g of carbon nanotubes into 50 ml of concentrated nitric acid, sonicate for 1 hour, then reflux at 75° C. for 3 hours, filter and dry...

Embodiment 3

[0051] A CNTs / PSMA / fluorocarbon surfactant composite material for oil-water separation, which is obtained by grafting PSMA on the surface of acidified carbon nanotubes through in-situ polymerization, and then compounding with fluorocarbon surfactant FS-500. The mass ratio of acidified carbon nanotubes to PSMA is 0.01:1; the diameter of carbon nanotubes is 10-20nm, and the length is 10μm-15μm; fluorocarbon surfactant FS-500 (amphoteric surfactant, active ingredient 27%) and The mass ratio of CNTs / PSMA is 1.62:2; the relative molecular mass of PSMA is 200,000-250,000.

[0052] The preparation method of the above-mentioned CNTs / PSMA / FCS composite material grafts a layer of PSMA on the surface of acidified carbon nanotubes by in-situ polymerization, and the specific steps are as follows:

[0053] 1) Pour 1 g of carbon nanotubes into 50 ml of concentrated nitric acid and 50 ml of concentrated sulfuric acid, sonicate for 1.5 hours, then reflux at 75° C. for 5 hours, filter and dry t...

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Abstract

The invention discloses a CNTs / PSMA / fluorocarbon surfactant composite material for oil-water separation and a preparation method thereof. The CNTs / PSMA / fluorocarbon surfactant composite material of the present invention includes CNTs / PSMA obtained by polymerizing modified CNTs with carboxyl and / or hydroxyl groups on the surface and PSMA, and fluorocarbon is adsorbed on the surface of the PSMA of the CNTs / PSMA Surfactant. The invention grafts PSMA on the surface of CNTs through in-situ polymerization, so that CNTs can be uniformly dispersed in PSMA, which solves the problem that CNTs are difficult to uniformly disperse in polymers; increases the mechanical strength of polymer materials and broadens the Its scope of application: PSMA / CNTs and fluorocarbon surfactants undergo intermolecular self-assembly and rearrangement through electrostatic forces, etc., forming hydrophilic nanochannels to endow the membrane with a good oil-water separation effect, thereby completing oil-water separation at the same time The anti-fouling performance of the material is improved, the possibility of PSMA being applied in the fields of oil-water separation and the like is increased, and it has great application prospects in the fields of water treatment and the like.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a CNTs / PSMA / fluorocarbon surfactant composite material used for oil-water separation. Background technique [0002] Carbon nanotubes (CNTs) are a new type of carbon material with a size in the nanoscale range and a complete molecular structure. Carbon nanotubes have excellent mechanical, electrical, and optical properties, as well as excellent transmission properties. Polymer composites filled with carbon nanotubes have become an important research direction in the field of materials. However, carbon nanotubes have poor compatibility with matrix materials, so it is difficult to disperse uniformly in the polymer matrix, and their excellent performance cannot be effectively exerted. [0003] Among many polymer materials, styrene-maleic anhydride copolymer (PSMA) is an amphiphilic polymer. This type of polymer not only has the thickening properties of general polymers,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/82B01D67/00B01D69/02B01D69/12B01D71/02B01D71/38
CPCB01D67/0079B01D69/02B01D69/125B01D71/021B01D71/027B01D71/38B01D71/82B01D2325/30B01D2325/36
Inventor 郭雅妮鲍世轩文轩张宇杜飞鹏
Owner WUHAN INSTITUTE OF TECHNOLOGY