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

A functionalized graphene hybrid composite film based on nano-silver particles and its preparation and application

A technology of nano-silver particles, hybridization and compounding, applied in chemical instruments and methods, membrane technology, petroleum industry, etc., can solve the problems of difficult interaction and stable loading of metal ions, etc., to improve the enrichment factor and improve the preparation process Simple and controllable, mild effect

Active Publication Date: 2018-05-01
TIANJIN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene is a two-dimensional material with a large specific surface area and a large aspect ratio. It is a good choice for supporting metal ions. stable load of ions

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 functionalized graphene hybrid composite film based on nano-silver particles and its preparation and application
  • A functionalized graphene hybrid composite film based on nano-silver particles and its preparation and application
  • A functionalized graphene hybrid composite film based on nano-silver particles and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: prepare the Pebax-nano-silver functionalized graphene hybrid composite membrane composite membrane of 2% of filling amount (that is, the mass ratio of the graphene composition in the filler and the substrate), comprising the following steps:

[0021] Step 1, preparation of functionalized graphene: disperse the graphene oxide nanosheets in deionized water (the usage amount of graphene oxide is determined according to the required ratio according to the Pebax quality used in the subsequent steps, and the ratio is 2%), Make a suspension with a concentration of 0.3g / L, and disperse it ultrasonically for 15 minutes; dissolve tromethamine (trade name Trizma base) in deionized water to make a 0.04mol / L solution; mix the suspension with the solution , the pH of the mixture was adjusted to 10 with hydrochloric acid. Add dopamine hydrochloride with the same mass as the aforementioned graphene oxide, and after dissolving, ultrasonically disperse for 15 minutes in an ...

Embodiment 2

[0025] Embodiment 2: prepare the composite film of filling amount 6%, comprise the following steps:

[0026] Step 1, preparation of functionalized graphene: disperse the graphene oxide nanosheets in deionized water (the usage amount of graphene oxide is determined according to the required ratio according to the Pebax quality used in the subsequent steps, and the ratio is 6%), Make a suspension with a concentration of 0.5g / L, and disperse it ultrasonically for 10 minutes; dissolve Trizma base in deionized water to make a 0.02mol / L solution; mix the suspension with the solution, and adjust the pH of the mixture with hydrochloric acid Adjust to 8.5. Add dopamine hydrochloride with the same mass as the aforementioned graphene oxide, and after dissolving, ultrasonically disperse for 10 minutes in an ice bath (the temperature is kept below 10°C); stir vigorously in a water bath preheated to 60°C, and at a speed of 10000r / min centrifuged under the conditions to obtain a precipitate...

Embodiment 3

[0034] Embodiment 3: prepare the composite film of filling amount 8%, comprise the following steps:

[0035] Step 1, preparation of functionalized graphene: disperse the graphene oxide nanosheets in deionized water (the usage amount of graphene oxide is determined according to the required ratio according to the Pebax quality used in the subsequent steps, and the ratio is 8%), Make a suspension with a concentration of 0.6g / L, and disperse it ultrasonically for 30 minutes; dissolve Trizma base in deionized water to make a 0.01mol / L solution; mix the suspension with the solution, and adjust the pH of the mixture with hydrochloric acid Adjust to 8. Add dopamine hydrochloride with the same mass as the aforementioned graphene oxide, and after dissolving, ultrasonically disperse for 30 minutes in an ice bath (the temperature is kept below 10°C); stir vigorously in a water bath preheated to 55°C, at a speed of 9500r / min centrifuged under the conditions to obtain a precipitate, washe...

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
enrichment factoraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a nano-silver functionalized graphene nanosheet, and application of a hybridized composite membrane constructed on the basis of the preparation method. Silver ions are fixed by poly-dopamine through complexation and form nano-silver particles by in-situ reduction; an adhesion effect of the poly-dopamine, graphene and the nano-silver particles enables the silver particles to be stably loaded on the surface of functionalized graphene. The thickness of a membrane is about 0.5 mu. m, the membrane is formed by a polyether-polyamide block copolymer matrix and a nano-silver functionalized graphene filling agent, wherein the mass fraction of the graphene is 2-8 percent. The poly-dopamine and oxidized graphene react, then silver nitrate is introduced to react with dopamine to generate the nano-silver particles loaded on the surface of the functionalized graphene. The membrane substrate is filled with the functionalized graphene, and the composite membrane is obtained by spin coating the surface of a polysulfone ultrafiltration membrane support layer. The preparation process is simple, convenient and controllable, the membrane is applied to a permeation evaporation oil product desulfurization process, the nano-silver particles play a role of promoting an organic sulfur component to be preferentially transmitted, and higher separation performance is achieved.

Description

technical field [0001] The invention relates to a membrane and its preparation and application, and belongs to the technical field of membrane separation, specifically, to the field of polymer-organic composite membranes. Background technique [0002] Facilitated transfer membrane is a type of reactive membrane, the principle of which is to promote the preferential permeation through the reversible affinity reaction between the active carrier loaded on the membrane and the component that needs to permeate preferentially in the mixture to be separated. This type of membrane usually has high separation performance, and plays an important and unique role in the fields of oil desulfurization, separation of alkanes and olefins, separation of aromatics, carbon dioxide capture, medical oxygen and industrial oxygen production. In the aforementioned fields, the preferentially permeable components can be divided into two types: organic components and inorganic components. The organic...

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): B01D71/80B01D69/12B01D67/00C10G31/09
CPCB01D67/0079B01D69/12B01D71/80C10G31/09C10G2300/202
Inventor 姜忠义于胜楠杨森潘福生杨冬丁鹤
Owner TIANJIN UNIV