Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A modified polyvinylidene fluoride ultrafiltration membrane and its preparation method

A polyvinylidene fluoride and ultrafiltration membrane technology, which is applied in ultrafiltration, chemical instruments and methods, and membranes, can solve problems such as limited water resources, and achieve the effects of long durability, super adsorption performance, and good hydrophilicity

Active Publication Date: 2022-05-10
GUANGZHOU UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the available water resources in our country are very limited, and industrial wastewater must be purified and reused to make up for the shortcomings of insufficient water resources.

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 modified polyvinylidene fluoride ultrafiltration membrane and its preparation method
  • A modified polyvinylidene fluoride ultrafiltration membrane and its preparation method
  • A modified polyvinylidene fluoride ultrafiltration membrane and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An embodiment of the modified polyvinylidene fluoride ultrafiltration membrane of the present invention, the preparation method of the modified polyvinylidene fluoride ultrafiltration membrane described in this embodiment comprises the following steps:

[0033] One, prepare polyvinylidene fluoride ultrafiltration membrane, comprise the following steps:

[0034] (a) PVDF was dissolved in triethyl phosphate at 70° C., and stirred under nitrogen at a mechanical stirring speed of 400 rpm for 10 h to obtain a homogeneous solution;

[0035] (b) Carry out vacuum degassing to the homogeneous solution prepared in step (a), remove the microbubbles therein, obtain casting solution, scrape the casting solution onto the non-woven fabric, and quickly soak it in the coagulation bath V 磷酸三乙酯 :V 水 =5:5, soak for 20s to get primary PVDF ultrafiltration membrane;

[0036] (c) solidifying the primary PVDF ultrafiltration membrane obtained in step (b) in deionized water, and drying to obt...

Embodiment 2

[0042] An embodiment of the modified polyvinylidene fluoride ultrafiltration membrane of the present invention, the preparation method of the modified polyvinylidene fluoride ultrafiltration membrane described in this embodiment comprises the following steps:

[0043] One, prepare polyvinylidene fluoride ultrafiltration membrane, comprise the following steps:

[0044] (a) PVDF was dissolved in triethyl phosphate at 80° C., and stirred under nitrogen at a mechanical stirring speed of 500 rpm for 12 hours to obtain a homogeneous solution;

[0045] (b) Carry out vacuum degassing to the homogeneous solution prepared in step (a), remove the microbubbles therein, obtain casting solution, scrape the casting solution onto the non-woven fabric, and quickly soak it in the coagulation bath V 磷酸三乙酯 :V 水 =5:5, soak for 30s to get primary PVDF ultrafiltration membrane;

[0046] (c) solidifying the primary PVDF ultrafiltration membrane obtained in step (b) in deionized water, and drying to...

Embodiment 3

[0052] An embodiment of the modified polyvinylidene fluoride ultrafiltration membrane of the present invention, the preparation method of the modified polyvinylidene fluoride ultrafiltration membrane described in this embodiment comprises the following steps:

[0053] One, prepare polyvinylidene fluoride ultrafiltration membrane, comprise the following steps:

[0054] (a) PVDF was dissolved in triethyl phosphate at 90° C., and stirred under nitrogen at a mechanical stirring speed of 600 rpm for 14 hours to obtain a homogeneous solution;

[0055] (b) Carry out vacuum degassing to the homogeneous solution prepared in step (a), remove the microbubbles therein, obtain casting solution, scrape the casting solution onto the non-woven fabric, and quickly soak it in the coagulation bath V 磷酸三乙酯 :V 水 =5:5, soak for 40s to get primary PVDF ultrafiltration membrane;

[0056] (c) solidifying the primary PVDF ultrafiltration membrane obtained in step (b) in deionized water, and drying to...

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
particle diameteraaaaaaaaaa
surfaceaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a modified polyvinylidene fluoride ultrafiltration membrane, and relates to the technical field of water treatment. The preparation method of the modified polyvinylidene fluoride ultrafiltration membrane includes the following steps: (1) reversely place the polyvinylidene fluoride ultrafiltration membrane in an ultrafiltration device, and pour in a uniformly dispersed suction filtrate; wherein, the suction filtrate includes nano Ferric oxide particle and dilute hydrochloric acid; (2) apply pressure to polyvinylidene fluoride ultrafiltration membrane, carry out suction filtration, after suction filtration is finished, the unfixed nanometer ferric oxide particle of polyvinylidene fluoride ultrafiltration membrane surface After cleaning and drying, a modified polyvinylidene fluoride ultrafiltration membrane is obtained. The modified polyvinylidene fluoride ultrafiltration membrane prepared by the invention has good hydrophilicity, super-adsorption performance and high interception effect, and the membrane surface has anti-pollution performance and long service life.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a modified polyvinylidene fluoride ultrafiltration membrane and a preparation method thereof. Background technique [0002] With the rapid development of economy and society and the rapid development of industrial production, the amount of industrial water and wastewater produced in my country has increased rapidly. However, the available water resources in our country are very limited, and industrial wastewater must be purified and reused to make up for the shortage of water resources. [0003] At present, the domestic sewage treatment industry is booming. Membrane separation technology is a method that uses the membrane as the separation medium, applies a certain propulsion force on both sides of the membrane, and selectively measures the original substance through the membrane, so as to achieve the purpose of separation. With the accumulation of basic theoretical res...

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): B01D71/34B01D69/02B01D67/00B01D61/14C02F1/28C02F1/44
CPCB01D71/34B01D69/02B01D67/0013B01D61/145C02F1/285C02F1/444B01D2325/36
Inventor 胡春何子俊熊竹
Owner GUANGZHOU UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products