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MXene high-strength composite hydrogel as well as preparation method and application thereof

A composite hydrogel, high-strength technology, used in antifouling/underwater coatings, biocide-containing paints, coatings, etc., can solve problems such as self-aggregation, difficulty in obtaining uniform distribution, etc. Excellent self-healing and mechanical properties

Pending Publication Date: 2022-05-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when high concentration of MXene is added to the hydrogel, it is prone to self-aggregation, and it is difficult to obtain a uniformly distributed MXene composite hydrogel.

Method used

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  • MXene high-strength composite hydrogel as well as preparation method and application thereof
  • MXene high-strength composite hydrogel as well as preparation method and application thereof
  • MXene high-strength composite hydrogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 100mg Ti 3 C 2 T x Add 20mL of ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C). After ultrasonication, add 20 mL of absolute ethanol and 50 mg of surface modifier AMBD, stir at room temperature for 24 h, wash with ultrapure water and absolute ethanol for 3 times (centrifugal speed 10000 r / min, centrifugation time 5 min), and then dry in vacuum Dry in oven at 40°C for 12h to obtain surface-functionalized MXene nanosheets, denoted as AMBD-Ti 3 C 2 T x .

[0035] 40mgAMBD-Ti 3 C 2T x Put it into a 25mL beaker, add 10mL ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C), then add 4.32g (60mmol) acrylic acid, 1.13g (10mmol) N-isopropylacrylamide, 9.24mgN, N-methylenebisacrylamide, after mixing evenly, add an appropriate amount of ultrapure water to prepare 20mL of hydrogel pre-polymerization solution, keep the negative pressure in a vacuum drying oven for 30min to remove the...

Embodiment 2

[0039] 100mg Ti 3 C 2 T x Add 20mL of ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C). Add 20m L of absolute ethanol and 50mg of surface modifier AMBD after the ultrasonication, stir at room temperature for 24h, centrifuge and wash with ultrapure water and absolute ethanol three times (centrifugation speed 10000r / min, centrifugation time 5min), and then vacuum Dry in a drying oven for 12 hours (at a temperature of 40°C) to obtain surface-functionalized MXene nanosheets, denoted as AMBD-Ti 3 C 2 T x .

[0040] 40mgAMBD-Ti 3 C 2 T x Put it into a 25mL beaker, add 10mL ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C), then add 4.26g (60mmol) acrylamide, 1.13g (10mmol) N-isopropylacrylamide, 9.24mg N,N-methylenebisacrylamide, after mixing evenly, add appropriate amount of ultrapure water to prepare 20mL hydrogel pre-polymerization solution, keep negative pressure in a vacuum dry...

Embodiment 3

[0043] 100mg Ti 3 C 2 T x Add 20mL of ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C). Add 20m L of absolute ethanol and 50mg of surface modifier AMBD after the ultrasonication, stir at room temperature for 24h, centrifuge and wash with ultrapure water and absolute ethanol three times (centrifugation speed 10000r / min, centrifugation time 5min), and then vacuum Dry in a drying oven for 12 hours (at a temperature of 40°C) to obtain surface-functionalized MXene nanosheets AMBD-Ti 3 C 2 T x .

[0044] 40mgAMBD-Ti 3 C 2 T x Put it into a 25mL beaker, add 10mL ultrapure water for directional ultrasound (ultrasonic time 30min, power 320w, temperature 5°C), then add 4.32g (60mmol) acrylic acid, 1.13g (10mmol) N-isopropylacrylamide, mix well Add appropriate amount of ultrapure water to make 20mL hydrogel pre-polymerization liquid, keep negative pressure in vacuum drying oven for 30min to remove air bubbles in the pre-polymerizati...

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Abstract

The invention discloses Mxene high-strength composite hydrogel as well as a preparation method and application thereof, and belongs to the technical field of nano composite materials. The preparation method comprises the following steps: adding original Mxene into water, and carrying out low-temperature ultrasonic treatment in an air atmosphere to obtain a stripped Mxene nanosheet solution; adding 4-((allylamino) methyl) benzene-1, 2-diol and absolute ethyl alcohol into the solution, and obtaining surface-functionalized Mxene nanosheets under the anchoring action of dopamine groups; the preparation method comprises the following steps: dispersing Mxene into water, then adding a monomer and a cross-linking agent, uniformly mixing to obtain a hydrogel pre-polymerized solution, adding an initiator into the hydrogel pre-polymerized solution, and standing at room temperature to generate a polymerization reaction to obtain the Mxene high-strength composite hydrogel. According to the preparation method disclosed by the invention, MXene is uniformly distributed in the hydrogel, and the prepared MXene high-strength composite hydrogel is endowed with a functional characteristic while the mechanical property is greatly improved.

Description

technical field [0001] The invention relates to the technical field of nanocomposite materials, and more specifically relates to a Mxene high-strength composite hydrogel and its preparation method and application. Background technique [0002] Hydrogel material is a squishy material with a three-dimensional cross-linked network, which has strong hydrophilicity. The water content in its components accounts for a considerable proportion, and it has excellent biocompatibility. It can be used in biological materials, Wearable devices, smart sensors and other fields have broad application prospects. However, traditional chemically crosslinked hydrogels have poor mechanical properties and lack of functionality, which limits the application of hydrogels in many aspects. [0003] Nanoparticles are a widely used polymer filler material. When nanoparticles are added to the polymer system, the resulting nanocomposites can significantly improve mechanical properties, thermal stability,...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08F220/06C08F220/54C08F222/38C08F220/56C08K9/04C08K9/02C08K3/14C09D133/02C09D133/26C09D133/24C09D5/14
CPCC08J3/075C08F220/06C08F220/56C08F220/54C08K9/04C08K9/02C08K3/14C09D133/02C09D133/26C09D133/24C09D5/14C08K2201/011C08J2333/02C08J2333/26C08J2333/24C08F222/385
Inventor 叶谦高敬得何宝罗刘淑娟周峰
Owner NORTHWESTERN POLYTECHNICAL UNIV