Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of preparation method and application of PVDF/go@pda@hnts composite membrane

A composite membrane and dopamine hydrochloride technology, applied in separation methods, chemical instruments and methods, membranes, etc., can solve the problems of limited types of oily sewage, poor chemical resistance, and low separation efficiency, and achieve good regeneration and anti-fouling Unique, easy-to-control, and wide-ranging effects

Active Publication Date: 2021-06-22
JIANGSU UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyvinylidene fluoride (PVDF) membrane has excellent properties such as good chemical stability, high mechanical strength, and high toughness, and has good application prospects in the field of wastewater degreasing; however, hydrophobic PVDF membranes have low surface energy and low permeation flux. , easy to pollute and other issues restrict its application in the field of membrane separation
[0004] The essence of oil-water separation is the interface problem. Obtaining super-oleophobic or super-hydrophobic separation materials by designing the special wettability of the material surface is undoubtedly the most effective means to improve its oil-water separation performance; however, membrane materials based on special wettability There are also many problems in the application, such as poor swelling resistance of the membrane, poor chemical resistance, rapid flux attenuation, limited types of oily sewage treatment, and low separation efficiency. These problems need to be solved urgently

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method and application of PVDF/go@pda@hnts composite membrane
  • A kind of preparation method and application of PVDF/go@pda@hnts composite membrane
  • A kind of preparation method and application of PVDF/go@pda@hnts composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of PVDF / GO membrane: Weigh 0.15g of graphene, 1.5g of polyvinylidene fluoride powder, 0.25g of polyvinyl alcohol and 0.1g of polyvinylpyrrolidone into 30mL of N-methylpyrrolidone, place in 50 Stir mechanically at ℃ for 24 hours to obtain a casting solution, which is evenly coated on a glass plate and put into deionized water to make a PVDF / GO composite membrane;

[0031] (2) Prepare 100mL of 2mg / L dopamine hydrochloride solution, add 0.05g halloysite for ultrasonication, add PVDF / GO membrane, seal and shake for 6h, take out the membrane, rinse it with deionized water, and dry it to obtain PVDF / GO @PDA @HNTs film.

Embodiment 2

[0033] (1) Preparation of PVDF / GO membrane: Weigh 0.3g of graphene, 3g of polyvinylidene fluoride powder, 0.5g of polyvinyl alcohol and 0.3g of polyvinylpyrrolidone into 30mL of N-methylpyrrolidone and place at 50°C Under the condition of mechanical stirring for 24 hours, the casting solution was obtained, and the casting solution was evenly coated on the glass plate, and put into deionized water to make a PVDF / GO composite membrane;

[0034] (2) Prepare 100mL of 2mg / L dopamine hydrochloride solution, add 0.1g halloysite for ultrasonication, add PVDF / GO membrane, seal and shake for 24 hours, take out the membrane, rinse it with deionized water, and dry it to obtain PVDF / GO @PDA @HNTs film.

Embodiment 3

[0036] (1) Preparation of PVDF / GO membrane: Weigh 0.6g of graphene, 6g of polyvinylidene fluoride powder, 1g of polyvinyl alcohol and 0.4g of polyvinylpyrrolidone into 30mL of N-methylpyrrolidone, and mechanically stir at 50°C After 24 hours, the casting solution was obtained, and the casting solution was evenly coated on a glass plate, and put into deionized water to make a PVDF / GO composite membrane;

[0037] (2) Prepare 100mL of 2mg / L dopamine hydrochloride solution, add 0.2g halloysite for ultrasonication, add PVDF / GO membrane, seal and shake for 18h, take out the membrane, rinse it with deionized water, and dry it to obtain PVDF / GO @PDA @HNTs film.

[0038] figure 1 The scanning electron microscope image of the super-hydrophilic PVDF / GO@PDA@HNTs composite membrane prepared for Example 2 shows that a layer of rod-shaped nanoparticles is distributed on the surface of the membrane, which increases the roughness of the membrane surface.

[0039] figure 2 The oil contact a...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
oil-water separation rateaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of preparation of environmental functional materials, and specifically relates to a preparation method of a PVDF / GO@PDA@HNTs composite membrane; the specific steps are as follows: firstly, a PVDF / GO composite membrane is prepared; a dopamine solution is prepared, and halloysite is dissolved in Add PVDF / GO composite membrane to the dopamine solution, shake and react, rinse with deionized water and ethanol, and dry to make PVDFGO@PDA@HNTs composite membrane; the invention adopts membrane separation technology, the process is short and easy to operate control, resource saving, no secondary pollution, conforms to the concept of green chemistry, and is suitable for widespread promotion and use.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and in particular relates to a preparation method and application of a PVDF / GO@PDA@HNTs composite film. Background technique [0002] In recent years, large amounts of oily wastewater caused by crude oil exploitation, marine oil spill accidents, and domestic sewage have become a major challenge to the environment. Oily wastewater will cause great harm to the environment. For example, oil floating on the sea surface will quickly spread to form an airtight oil film, which will hinder the reoxygenation of the water body, lead to the lack of oxygen in the ocean water body, affect the growth of marine plankton, and destroy the marine ecology. balance. Oily sewage is also extremely difficult to treat, with low efficiency and high cost. The oil in sewage is divided into four types according to its physical state: free oil, dispersed oil, emulsified oil, and dis...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D71/34B01D71/02B01D17/022C02F1/44C02F1/40
CPCB01D17/0202B01D67/0079B01D69/02B01D69/12B01D71/021B01D71/34B01D2325/36C02F1/40C02F1/44
Inventor 王倩倩崔久云谢阿田刘思玮闫永胜
Owner JIANGSU UNIV