Method for preparing two-dimensional cross-linked polymer

A technology for cross-linking polymers and polymers, applied in the field of polymer chemistry, can solve the problems of dynamic instability, the difficulty of interfacial polymerization to prepare two-dimensional polymers on a large scale, and the inability to maintain two-dimensional structures.

Active Publication Date: 2022-06-07
ANHUI UNIVERSITY
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the interface area, the interfacial polymerization method is difficult to meet the needs of large-scale preparation of two-dimensional polymers
[0004] It is well known that amphiphilic organic compounds, such as surfactants, can form layered two-dimensional supramolecular aggregates through self-assembly in aqueous solution under certain conditions. Molecular self-assembly due to dynamic instability such as molecular exchange, migration, and rearrangement, makes this two-dimensional supramolecular structure very fragile and dissociates after drying or polymerization and cannot maintain its two-dimensional structure.

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 preparing two-dimensional cross-linked polymer
  • Method for preparing two-dimensional cross-linked polymer
  • Method for preparing two-dimensional cross-linked polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1.1 The preparation method of the amphiphilic monofunctional monomer A specifically includes the following steps:

[0055] 50 mL of ethanol, 5 mL of deionized water and sodium hydroxide (1.11 g, 27.86 mmol) were added to 12-aminododecanoic acid (2 g, 9.29 mmol), and acryloyl chloride (1 mL, 12 mmol) was added dropwise under an ice-water bath, and the dropwise addition was completed. Then, the ice-water bath was removed, and then the reaction was performed at room temperature for 3 hours. After the reaction was completed, suction filtration was performed, and the filtrate was acidified with hydrochloric acid. Then, 500 mL of deionized water was added. At this time, a white solid was precipitated. Body A in 70% yield. like figure 1 shown, the monofunctional monomer A was characterized by NMR.

[0056] The synthetic route of monofunctional monomer A is shown below:

[0057]

[0058] 1.2 Self-assembly of the amphiphilic monofunctional monomer A, which specifically inc...

Embodiment 2

[0064] The preparation method of amphiphilic monofunctional monomer B specifically comprises the following steps:

[0065] To a 100 mL round-bottomed flask was added p-aminobenzoic acid (2.0 g, 14.58 mmol), 10 mL of dichloromethane, triethylamine (6 mL, 43.28 mmol), and acryloyl chloride (1.78 mL, 21.9 mmol) was added dropwise under an ice bath. After dropping, the ice bath was removed, and the reaction was kept overnight at room temperature. After the reaction, 1 mol / L hydrochloric acid was directly used for acidification, and a solid was precipitated. Finally, suction filtration and washing were performed to obtain monofunctional monomer B with a yield of 74%. The H NMR spectrum of the obtained amphiphilic monofunctional monomer B is as follows: Figure 10 shown.

[0066] The synthetic route of monofunctional monomer B is shown below:

[0067]

[0068] To the monofunctional monomer B (1.00 g, 5.23 mmol), add 10 mL of deionized water, sonicate for 5 minutes, then add 1.2...

Embodiment 3

[0071] According to the steps of Example 2, the (cross-linking agent) ethylene glycol dimethacrylate was changed into (cross-linking agent) divinylbenzene (2.1 μL, 14.8 μmol), and the two-dimensional supramolecules were obtained by shaking uniformly;

[0072] Add potassium persulfate (4 mg, 14.86 μmol) aqueous solution to the two-dimensional supramolecular solution, and then add sodium thiosulfate pentahydrate (3.34 mg, 13.45 μmol) aqueous solution after deoxygenation and nitrogen operation, and then polymerize at 30 °C for 12 After the polymerization was completed, dialysis was performed with a dialysis bag with a molecular weight cut-off of 8,000-14,000 for 24 hours, and the water was changed every 3 hours for a total of 4 times to obtain a two-dimensional polymer. like Figure 12 As shown, the morphology of the polymer was characterized by optical microscopy (OM), and a large number of lamellar structures were observed.

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for efficiently preparing a two-dimensional cross-linked polymer, and relates to the field of polymer chemistry, and the method comprises the following steps: (1) synthesizing an amphiphilic monofunctional monomer; (2) self-assembling an amphiphilic monomer and a cross-linking agent in water to obtain a two-dimensional supramolecular aggregate solution; and (3) injecting an initiator into the two-dimensional supramolecular solution, and carrying out free radical polymerization to obtain a two-dimensional cross-linked polymer solution. The preparation method has the beneficial effects that a cross-linked structure in the two-dimensional polymer obtained by the scheme enables the structure to be very stable, the two-dimensional polymer is not limited by surface area and does not need a stripping process when being prepared, and all solvents are water; therefore, the scheme is a simple, convenient, efficient, green and environment-friendly method for preparing the two-dimensional polymer with a stable structure, and a solid foundation is laid for further development and application of the two-dimensional polymer.

Description

technical field [0001] The invention relates to the field of polymer chemistry, and specifically relates to a method for efficiently preparing two-dimensional cross-linked polymers. Background technique [0002] It is well known that the properties of polymers are not only related to their chemical composition, but also highly dependent on the arrangement of their monomeric units. In recent years, research on organic two-dimensional (2D) polymers has also attracted increasing attention, motivated by the significant achievements in graphene research. Two-dimensional polymers are generally defined as repeating structures interconnected by covalent bonds in two-dimensional directions to form lamellar macromolecules with atomic or molecular thickness. Two-dimensional polymers can also be viewed as polymers that are covalently cross-linked in two-dimensional directions. Compared with traditional one-dimensional linear polymers and three-dimensional cross-linked polymers, two-di...

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): C08F220/58C08F222/14C08F212/36
CPCC08F220/58C08F222/102C08F212/36
Inventor 白玮白翠勇张文建
Owner ANHUI UNIVERSITY
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