Method for modifying polyethersulfone forward osmosis membrane through ZIF-8 in-situ growth and obtained membrane

A ZIF-8, in-situ growth technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., can solve the problems of failure, ZIF-8 does not grow stably, powder is easy to fall off, etc., to prevent Effects of Membrane Defect Problems

Inactive Publication Date: 2019-03-22
QINGDAO UNIV OF SCI & TECH
View PDF3 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

", but look at the accompanying drawings of the instructions figure 2 (The electron microscope image of the layer-by-layer self-assembled metal-organic framework composite film prepared in Example 2 of the present invention), the surface of the film does not form a dense and continuous ZIF-8 crystal layer, that is, a dodecahedral crystal structure, but only some powders, these powders It is easy to fall off. It can be seen that ZIF-8 does not grow stably on the surface of the membrane, but only adheres to the surface of the membrane, that is, its research has not been successful.

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
  • Method for modifying polyethersulfone forward osmosis membrane through ZIF-8 in-situ growth and obtained membrane
  • Method for modifying polyethersulfone forward osmosis membrane through ZIF-8 in-situ growth and obtained membrane
  • Method for modifying polyethersulfone forward osmosis membrane through ZIF-8 in-situ growth and obtained membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Prepare a modified polyethersulfone forward osmosis membrane 1 according to the following steps:

[0056] (1) Pretreatment of polyethersulfone basement membrane

[0057] Weigh 10g of sodium bisulfite powder and dissolve it in 1000mL of deionized water to prepare a sodium bisulfite solution with a mass volume ratio of 1%. Soak a circular polyethersulfone basement membrane with a diameter of 8cm in the sodium bisulfite solution Sterilized and stored, after soaking for 24 hours, take out the polyethersulfone basement membrane and place it in ultrapure water for later use. The polyethersulfone basement membrane soaked in ultrapure water for 24 hours can be used for modification synthesis.

[0058] (2) Dopamine (PDA) modified polyethersulfone membrane

[0059] Dopamine modification: Weigh 2 g of dopamine hydrochloride and place it in 1000 mL of prepared Tris buffer solution to prepare a dopamine hydrochloride solution, which is sealed for use. Soak the polyethersulfone ba...

Embodiment 2

[0063] Prepare a modified polyethersulfone forward osmosis membrane 2 according to the following steps:

[0064] (1) Pretreatment of polyethersulfone basement membrane

[0065] Weigh 10g of sodium bisulfite powder and dissolve it in 1000mL of deionized water to prepare a sodium bisulfite solution with a mass volume ratio of 1%. Soak a circular polyethersulfone basement membrane with a diameter of 8cm in the sodium bisulfite solution Sterilized and stored, after soaking for 24 hours, take out the polyethersulfone basement membrane and place it in ultrapure water for later use. The polyethersulfone basement membrane soaked in ultrapure water for 24 hours can be used for modification synthesis.

[0066] (2) Dopamine (PDA) modified polyethersulfone membrane

[0067] Dopamine modification: Weigh 2g of dopamine hydrochloride and place it in (1000mL) prepared Tris buffer solution to prepare a dopamine hydrochloride solution and seal it for use. Soak the polyethersulfone basement m...

Embodiment 3

[0081] Prepare a modified polyethersulfone forward osmosis membrane 1 according to the following steps:

[0082] (1) Pretreatment of polyethersulfone basement membrane

[0083] Weigh 10g of sodium bisulfite powder and dissolve it in 1000mL of deionized water to prepare a sodium bisulfite solution with a mass volume ratio of 1%. Soak a circular polyethersulfone basement membrane with a diameter of 8cm in the sodium bisulfite solution Sterilized and stored, after soaking for 24 hours, take out the polyethersulfone basement membrane and place it in ultrapure water for later use. The polyethersulfone basement membrane soaked in ultrapure water for 24 hours can be used for modification synthesis.

[0084] (2) Dopamine (PDA) modified polyethersulfone membrane

[0085] Dopamine modification: Weigh 2 g of dopamine hydrochloride and place it in 1000 mL of prepared Tris buffer solution to prepare a dopamine hydrochloride solution, which is sealed for use. Soak the polyethersulfone ba...

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

No PUM Login to view more

Abstract

The invention discloses a method for modifying a polyethersulfone forward osmosis membrane through ZIF-8 in-situ growth and an obtained membrane and belongs to the technical field of water treatment membranes. The method comprises the following steps: modifying a polyethersulfone based basement membrane with dopamine, so as to obtain a modified membrane; subjecting the modified membrane to a reaction in ZIF-8 mother liquor, and obtaining a continuous and dense ZIF-8 membranous layer on the surface of the membrane by using an in-situ growth method, thereby obtaining the membrane. The technicalscheme of the invention is the simplest and effective technology for modifying the polyethersulfone forward osmosis membrane through in-situ method growth, the entire process has no need of high pressure and high temperatures, an aqueous solvent is used and is non-toxic and pollution-free, and thus, the method is an environment-friendly synthesis process.

Description

technical field [0001] The invention relates to the technical field of water treatment membranes, in particular to a method for ZIF-8 in-situ growth modified polyethersulfone forward osmosis membrane and the obtained membrane. Background technique [0002] With the rapid development of economy and society, the population density is increasing year by year, and the crisis of fresh water resources has become one of the obstacles hindering human progress. The most important thing to use. [0003] Tracing back to the present, there are different methods of seawater desalination, but there are very few that can be mass-produced and processed by factories for commercial operation. The traditional methods have their disadvantages. The distillation device occupies a large area, consumes a lot of energy and will cause environmental pollution. The operation and management are complicated and require special care, and the operation and use costs are high. Reverse osmosis is a separat...

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 Applications(China)
IPC IPC(8): B01D61/00B01D67/00B01D69/02B01D71/68
Inventor 孟祥民王新萍陈夫山
Owner QINGDAO UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap