Preparation and application of high strength anti-tear magnetic hydrogel

A magnetic water and anti-tearing technology, applied in the direction of magnetism and catheter of organic materials/organic magnetic materials, can solve the problems of high hardness, limited application, large friction, etc., and achieve excellent mechanical properties, easy operation, and repeatability good sex effect

Inactive Publication Date: 2015-12-23
XI AN JIAOTONG UNIV
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, at present, most of the magnetic materials on various magnetic devices and equipment are hard metal magnetic materials, such as samarium cobalt magnets, neodymium iron boron magnets, ferrite magnets, alnico magnets, iron chromium cobalt magnets, etc., these Magnetic materials have disadvantages such as high friction and high hardness, which severely limit their application in related biological materials that are in direct contact with biological soft tissues. Therefore, it is extremely important to develop soft and wet magnetic materials with similar properties to biological tissues.

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
  • Preparation and application of high strength anti-tear magnetic hydrogel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] This embodiment includes the following steps:

[0025] Step 1: First, dissolve the powder of acrylamide and sodium alginate in sodium alginate@Fe 3 o 4 In the magnetic fluid, the above solution was carefully stirred for 1 h to obtain a uniform black magnetic fluid; then, N, N-methylenebisacrylamide crosslinking agent and ammonium persulfate initiator were added in sequence, and the Fe 3 o 4 Nanoparticles account for 5.0wt% of the total weight of the hydrogel, the weight ratio of acrylamide and sodium alginate is 8:1, the total weight of acrylamide monomer and sodium alginate accounts for 14wt% of the total weight of the hydrogel, N, The molar ratio of N-methylenebisacrylamide to acrylamide monomer is 0.028%, and the molar ratio of ammonium persulfate to acrylamide monomer is 0.031%; the prepared solution is transferred to a glass mold, and then the mold Put it into a 50°C water bath and heat it for 6h to form a gel to obtain Fe 3 o 4 @Sodium alginate-polyacrylamide...

Embodiment 2

[0029] This embodiment includes the following steps:

[0030] Step 1: First, dissolve the powder of acrylamide and sodium alginate in sodium alginate@Fe 3 o 4 In the magnetic fluid, the above solution was carefully stirred for 1 h to obtain a uniform black magnetic fluid; then, N, N-methylenebisacrylamide crosslinking agent and ammonium persulfate initiator were added in sequence, and the Fe 3 o 4 Nanoparticles account for 10.0wt% of the total weight of the hydrogel, the weight ratio of acrylamide and sodium alginate is 8:1, the total weight of acrylamide monomer and sodium alginate accounts for 16wt% of the total weight of the hydrogel, N, The molar ratio of N-methylenebisacrylamide to acrylamide monomer is 0.028%, and the molar ratio of ammonium persulfate to acrylamide monomer is 0.031%; the prepared solution is transferred to a glass mold, and then the mold Put it into a 50°C water bath and heat it for 6h to form a gel to obtain Fe 3 o 4 @Sodium alginate-polyacrylamid...

Embodiment 3

[0034] This embodiment includes the following steps:

[0035] Step 1: First, dissolve the powder of acrylamide and sodium alginate in sodium alginate@Fe 3 o 4 In the magnetic fluid, the above solution was carefully stirred for 1 h to obtain a uniform black magnetic fluid; then, N, N-methylenebisacrylamide crosslinking agent and ammonium persulfate initiator were added in sequence, and the Fe 3 o 4 Nanoparticles account for 5.0% of the total weight of the hydrogel, the weight ratio of acrylamide and sodium alginate is 6:1, the total weight of acrylamide monomer and sodium alginate accounts for 10wt% of the total weight of the hydrogel, N, N - The molar ratio of methylenebisacrylamide to acrylamide monomer is 0.028%, and the molar ratio of ammonium persulfate to acrylamide monomer is 0.031%; the prepared solution is transferred to a glass mold, and then the mold is placed Put it into a 50°C water bath and heat it for 6h to form a gel, and get Fe 3 o 4 @Sodium alginate-polya...

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
tensile strengthaaaaaaaaaa
compressive strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention relates to preparation and application of high strength anti-tear magnetic hydrogel. The preparation is as below: dissolving acrylamide monomer and a sodium alginate powder in a sodium alginate@Fe3O4 magnetic fluid, adding a crosslinking agent and an initiator to obtain a polyacrylamide hydrogel penetrated by a sodium alginate@Fe3O4 polymer chain and a free sodium alginate polymer chain; immersing the obtained hydrogel in an aqueous solution containing Mn<+> multivalent cations to diffuse Mn<+> into the hydrogel, crosslinking the sodium alginate@Fe3O4 and free sodium alginate polymer chain by electrostatic interaction to obtain the Fe3O4@(M-sodium alginate/polyacrylamide)magnetic hydrogel, which has high mechanical properties (tensile strength up to 1.0MPa, the maximum elongation at break of up to 11 times, compressive strength of up to 5.0MPa, and the maximum energy to break up to 2800J/m<2>), and is insensitive to the crack (the maximum elongation at break of the sample containing cracks up to 9 times). The high strength anti-tear magnetic hydrogel can be applied to magnetic medical catheters.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to the preparation and application of a high-strength tear-resistant magnetic hydrogel. Background technique [0002] As a kind of soft-wet material containing a large amount of water, hydrogel has been widely used in biomedical fields (for example, carriers of drugs / genes, biosensors, Tissue engineering scaffolds, etc.) and engineering fields (eg, flexible conductors, sensors, and flexible actuators, etc.) have a wide range of applications. Smart hydrogels are driven by various external stimuli, such as concentration, pH, temperature, light, electric and magnetic fields, etc., to realize their special functions. Among many smart hydrogels, magnetic hydrogels have attracted extensive attention due to their temporal and spatial controllability, magnetic responsiveness, especially non-invasiveness and remote actuation. However, due to the low mechanical propert...

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): C08L33/26C08L5/04C08K3/22C08F220/56C08J3/24H01F1/42A61M25/00
Inventor 陈咏梅曾海波
Owner XI AN JIAOTONG UNIV
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