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

a fe-based 3 o 4 Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure

A technology of polyacrylamide and cross-linked structure, which is applied in the field of preparation of polyacrylamide hydrogel based on Fe3O4 nanosheet cross-linked structure, can solve problems such as the three-dimensional network cross-linked structure of nanoparticles, and achieve the goal of preparing The process is simple, the reproducibility of product shape is good, and the effect of improving dispersion

Active Publication Date: 2022-04-01
HEBEI UNIV OF ENG
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, the reported Fe 3 o 4 Composite materials of nanomaterials and hydrogels, mainly based on Fe 3 o 4 Nano-zero-dimensional materials and Fe 3 o 4 Nano-one-dimensional materials, there is no report on the formation of a three-dimensional network cross-linked structure through magnetic assembly of nanoparticles

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 fe-based <sub>3</sub> o <sub>4</sub> Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure
  • a fe-based <sub>3</sub> o <sub>4</sub> Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure
  • a fe-based <sub>3</sub> o <sub>4</sub> Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] This embodiment provides a Fe-based 3 o 4 A preparation method for a polyacrylamide hydrogel with a cross-linked nanosheet structure, comprising the following steps:

[0046] (1) Weigh 1.09g of ferric chloride hexahydrate, add 2.8mL of ultrapure water, 40mL of absolute ethanol, and 5.0g of anhydrous sodium acetate, transfer the above mixture to a 100mL stainless steel hydrothermal kettle, heat to 170°C for 12h and then separate washing. Add 100mL ultrapure water and 5mL polyacrylic acid aqueous solution (M W =1800, 7.2mg / mL), stirred by a magnet for 24h, washed by centrifugation, and dispersed in 60mL ultrapure water (about 5mg / mL). figure 1 (a) is the Fe that embodiment 1 obtains 2 o 3 TEM image of nanosheets, Fe 2 o 3 The side length of the hexagonal nanosheets is 150 nm.

[0047] (2) Take 100mg Fe 2 o 3 Add 12mL of ultrapure water, 80mL of absolute ethanol, 4mL of ammonia water, and 250 μL of tetraethyl orthosilicate to react at room temperature for 30 minu...

Embodiment 2

[0055] This embodiment provides a Fe-based 3 o 4 A preparation method for a polyacrylamide hydrogel with a cross-linked nanosheet structure, comprising the following steps:

[0056] (1) Weigh 1.09g of ferric chloride hexahydrate, add 2.8mL of ultrapure water, 40mL of absolute ethanol, and 5.0g of anhydrous sodium acetate, transfer the above mixture to a 100mL stainless steel hydrothermal kettle, heat to 170°C for 12h and then separate washing. Add 100mL ultrapure water and 5mL polyacrylic acid aqueous solution (M W =1800, 7.2mg / mL), stirred by a magnet for 24h, washed by centrifugation, and dispersed in 60mL ultrapure water (about 5mg / mL). This step yields polyacrylic acid surface-modified Fe 2 o 3 Nanosheets.

[0057] (2) Take 100mg Fe 2 o 3 Nanosheets, add 12mL ultrapure water, 80mL absolute ethanol, 4mL ammonia water, 200μL tetraethyl orthosilicate, react at room temperature for 30min, centrifuge wash with ethanol, SiO 2 The thickness of the shell layer is 8 nm. T...

Embodiment 3

[0062] This embodiment provides a Fe-based 3 o 4 A preparation method for a polyacrylamide hydrogel with a cross-linked nanosheet structure, comprising the following steps:

[0063] (1) Weigh 1.09g of ferric chloride hexahydrate, add 2.8mL of ultrapure water, 40mL of absolute ethanol, and 5.0g of anhydrous sodium acetate, transfer the above mixture to a 100mL stainless steel hydrothermal kettle, heat to 170°C for 12h and then separate washing. Add 100mL ultrapure water and 5mL polyacrylic acid aqueous solution (M W =1800, 7.2mg / mL), stirred by a magnet for 24h, washed by centrifugation, and dispersed in 60mL ultrapure water (about 5mg / mL). This step yields polyacrylic acid surface-modified Fe 2 o 3 Nanosheets.

[0064] (2) Take 100mg Fe 2 o 3 Nanosheets, add 12mL ultrapure water, 80mL absolute ethanol, 4mL ammonia water, 250μL tetraethyl orthosilicate, react at room temperature for 30min, centrifuge wash with ethanol, SiO 2 The thickness of the shell layer is 10 nm. ...

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
wavelengthaaaaaaaaaa
wavelengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a Fe-based 3 o 4 Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure, including Fe 2 o 3 The nanosheets are used as templates, which are sequentially coated with silica, Fe 2 o 3 reduced to Fe 3 o 4 , in situ polymerized polyacrylamide and coated Fe 3 o 4 / SiO 2 Nanosheets, when polymerizing polyacrylamide, a certain strength of magnetic field is applied at the same time to obtain Fe-based 2 o 3 Polyacrylamide hydrogels with nanosheet cross-linked structure. Preferably Fe can also be obtained 3 o 4 / SiO 2 The nanosheets were then dispersed in water and a short-term magnetic field was applied to obtain Fe 3 o 4 Nanosheet cross-linked structure. with Fe 3 o 4 The cross-linked structure of nanosheets is the core, and the outer covering is polyacrylamide. The invention has the advantages of adjustable product structure, stable performance, high reproducibility, easy storage and use, and the like. The hydrogel prepared by the method of the invention contains both a molecular-scale three-dimensional network cross-linking structure and a nano-scale three-dimensional network cross-linking structure.

Description

technical field [0001] The invention relates to the technical field of nanocomposite synthesis, in particular to a Fe-based 3 o 4 Preparation method of polyacrylamide hydrogel with nanosheet cross-linked structure. Background technique [0002] Hydrogel is a polymer network system with a hydrophilic three-dimensional network cross-linked structure. Hydrogel is soft, can maintain a certain shape, can absorb a large amount of water, has good biocompatibility and biodegradability, and is widely used in energy, water absorption, sensing, biology and other fields. [0003] Fe 3 o 4 Nanomaterials have a huge specific surface area, are cheap, and have abundant reserves. They have attracted much attention in the fields of magnetism, catalysis, drug carriers, adsorption, sewage treatment, and optics. Fe 3 o 4 The properties of nanomaterials are closely related to their structures. For zero-dimensional Fe 3 o 4 Nanospherical materials, one-dimensional Fe 3 o 4 Nanorod mate...

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): C08J3/075C08F220/56C08F222/38C08K9/10C08K9/02C08K3/22C08K3/36
CPCC08J3/075C08F220/56C08K9/08C08K2201/011C08K2003/2275C08K3/36C08K9/10C08J2333/26C08F222/385
Inventor 张晓亮武春霞童林王彦明王泽虎
Owner HEBEI UNIV OF ENG