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Polymer hydrogel based on cross-linking of two-dimensional titanium carbide layered compound and preparation method and application of polymer hydrogel

A layered compound, two-dimensional titanium carbide technology, applied in carbide, titanium carbide, nanotechnology for materials and surface science, etc., can solve problems such as poor biocompatibility of chemical crosslinking agents, and achieve a simple preparation method. Feasible, high toughness, good biocompatibility

Inactive Publication Date: 2018-08-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the technical problem of poor biocompatibility of chemical crosslinking agents existing in the preparation process of existing polymer hydrogels, the present invention provides a method for preparing polymer hydrogels based on crosslinking of two-dimensional titanium carbide layered compounds , aiming to provide new crosslinkers with good biocompatibility in polymer hydrogels

Method used

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  • Polymer hydrogel based on cross-linking of two-dimensional titanium carbide layered compound and preparation method and application of polymer hydrogel
  • Polymer hydrogel based on cross-linking of two-dimensional titanium carbide layered compound and preparation method and application of polymer hydrogel
  • Polymer hydrogel based on cross-linking of two-dimensional titanium carbide layered compound and preparation method and application of polymer hydrogel

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Example 1: Ti 3 C 2 Preparation of nanosheets

[0057] 1-2g Ti 3 AlC 2 Uniformly disperse in 40% hydrofluoric acid solution, stir and peel at room temperature for 3 days, centrifuge at 10000rpm for 10min to get the precipitate, then wash repeatedly with deionized water until the pH is about 5-6; then place the precipitate in 25% After reacting in tetramethylammonium hydroxide (TMAOH) aqueous solution for 48 hours, centrifuge at 3500rpm for 15min to separate, take the precipitate and deoxygenated water in a ratio of 1:300, mix ultrasonically for 24h, centrifuge at 5000rpm for 30min and take the supernatant to obtain Ti 3 C 2 Nanosheets.

Embodiment 2

[0058] Example 2: Thermosensitive polymer hydrogel crosslinked based on two-dimensional titanium carbide layered compound under ultraviolet light triggering

[0059] Dissolve N-isopropylacrylamide monomer in 1mL Ti 3 C 2 (1.6wt%) nanosheets (prepared in Example 1) to obtain a polymerization starting solution, wherein the concentration of the monomers were 8wt%, 15wt%, 20wt% respectively; the starting solution was blown with nitrogen for 30min deoxygenation; At room temperature, the deoxygenated solution is polymerized under the light of a 500W mercury lamp (λ > 260nm), and the polymerization time is 60 minutes to form a temperature-sensitive polymer hydrogel cross-linked by a two-dimensional titanium carbide layered compound. For product photos see figure 1 (section marked mercury lamp).

[0060] When the strain of the polymer gel is in the range of 0% to 10%, the storage modulus G' is basically unchanged and much larger than the loss modulus G", showing the properties of a...

Embodiment 3

[0063] Example 3: Thermosensitive polymer hydrogel based on two-dimensional titanium carbide layered compound crosslinked under visible light triggering

[0064] Dissolve N-isopropylacrylamide monomer in 1mL Ti 3 C 2 (1.6wt%) nanosheets (made in Example 1), the initial polymerization solution was obtained, wherein the concentration of monomers was 8wt%, 15wt%, 20wt% respectively; adding initiator ammonium sulfate (APS; initiator and The molar ratios of the monomers are 0.030, 0.015, 0.010), and the obtained solution is deoxygenated by blowing nitrogen gas for 30 minutes; at room temperature, the solution after deoxygenation is polymerized under the light of a xenon lamp with a certain power (λ>420nm), and the polymerization time is 60 minutes. Thermoresponsive polymer hydrogels cross-linked with titanium carbide layered compounds. For product photos see figure 1 (section marked xenon lamp).

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Abstract

The invention belongs to the field of organic / inorganic nano composite hydrogel, and particularly discloses a preparation method of polymer hydrogel based on cross-linking of a two-dimensional titanium carbide layered compound. The method comprises the step of: with Ti3C2 nanosheets as a cross-linking agent and acrylic compounds and / or acrylamide compounds as monomers, performing a polymerizationreaction so as to obtain the polymer hydrogel. The invention also discloses the polymer hydrogel prepared by using the preparation method and application of the polymer hydrogel as a thermo-sensitivephase-change and / or near-infrared photothermal conversion material. According to the preparation method, the obtained polymer network structure is in situ doped with the Ti3C2 nanosheets which participate in the polymerization reaction through a physical and chemical crosslinking mode, not only can novel photoelectric characteristics be given to the polymer hydrogel, but also excellent mechanicalproperties, such as self-healing performance and high toughness, can be achieved.

Description

technical field [0001] The invention relates to a temperature-sensitive polymer hydrogel crosslinked based on a two-dimensional titanium carbide layered compound, a preparation method and an application thereof, and belongs to the field of organic / inorganic nanocomposite hydrogels. Background technique [0002] Organic / inorganic nanocomposite hydrogels generally refer to the uniform dispersion of inorganic nanoparticles in the crosslinked network composed of organic polymers, which can not only endow polymer hydrogels with new optoelectronic properties, but also endow excellent mechanical properties, such as self- Healing properties, high toughness, etc., are particularly beneficial for expanding the application of hydrogels. Inorganic nanoparticles that have been widely studied in this field include nanoclays (lithium diatomaceous earth, etc.), graphene oxide, layered rare earth hydroxides, C 3 N 4 Wait. [0003] Existing composite hydrogels generally need to be prepared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/54C08F2/48C08K3/14C01B32/921B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/921C08F2/48C08F120/54C08K3/14C08K2201/011
Inventor 李娟陶娜张德盘孙晓毅刘又年
Owner CENT SOUTH UNIV
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