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MXene/natural rubber flexible composite film and preparation method thereof

A natural rubber and composite film technology, applied in the field of MXene/natural rubber flexible composite film and its preparation, can solve the problems of poor mechanical properties, complicated process, poor environmental friendliness, etc., and achieve low cost, broad application prospects, and excellent flexibility Effect

Active Publication Date: 2019-12-24
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved in the present invention is to overcome the defects such as poor mechanical properties, complicated process, and poor environmental friendliness in the existing technology for preparing MXene films, and provide a kind of MXene / natural rubber flexible composite film and its preparation method

Method used

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  • MXene/natural rubber flexible composite film and preparation method thereof
  • MXene/natural rubber flexible composite film and preparation method thereof
  • MXene/natural rubber flexible composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Ti 3 C 2 The preparation of the flexible composite film of natural rubber, the method is as follows:

[0031] 1) Take 0.5g Ti 3 AlC 2 Put 0.5g lithium fluoride in a plastic beaker, add 10mL hydrochloric acid with a concentration of 7mol / L, stir and react at 30°C for 36h, the stirring speed is 400rpm, after the reaction is completed, it is centrifuged repeatedly, washed until the pH is 6, and dried to obtain Ti 3 C 2 precipitation.

[0032] 2) Take the Ti obtained in step 1) 3 C 2 Precipitate 0.2g, disperse in 40mL deionized water, ultrasonicate at 0°C for 30min, ultrasonic power is 100W, then centrifuge at 4000rpm for 5min, remove the precipitate, take the supernatant to obtain Ti 3 C 2 nanosheet suspension.

[0033] 3) with the Ti obtained in step 2) 3 C 2 Prepared as a 2mg / mL suspension, natural rubber as a 2mg / mL emulsion, according to Ti 3 C 2 The volume ratio of nanosheet suspension and natural rubber emulsion is 9:1 to prepare a mixed solution. Ultra...

Embodiment 2

[0037] Ti 3 C 2 The preparation of the flexible composite film of natural rubber, the method is as follows:

[0038] 1) Take 0.5g Ti 3 AlC 2 Put 0.5g lithium fluoride in a plastic beaker, add 11mL of hydrochloric acid with a concentration of 8mol / L, stir and react at 35°C for 42h, the stirring speed is 450rpm, after the reaction, centrifuge repeatedly, wash until the pH is 6.5, and dry to obtain Ti 3 C 2 precipitation.

[0039] 2) Take the Ti obtained in step 1) 3 C 2 Precipitate 0.2g, disperse in 45mL deionized water, sonicate at 1°C for 40min, ultrasonic power is 150W, then centrifuge at 4500rpm for 10min, remove the precipitate, take the supernatant to obtain Ti 3 C 2 nanosheet suspension.

[0040] 3) with the Ti obtained in step 2) 3 C 2 Prepared as a 2mg / mL suspension, natural rubber as a 2mg / mL emulsion, according to Ti 3 C 2 The volume ratio of nanosheet suspension and natural rubber emulsion is 8:2 to prepare a mixed solution. Ultrasound at 1°C for 15 min...

Embodiment 3

[0043] Ti 3 C 2 The preparation of the flexible composite film of natural rubber, the method is as follows:

[0044] 1) Take 0.5g Ti 3 AlC 2 Put 0.5g lithium fluoride in a plastic beaker, add 12mL of hydrochloric acid with a concentration of 9mol / L, stir and react at 40°C for 48h, the stirring speed is 500rpm, after the reaction, centrifuge repeatedly, wash until the pH is 7, and dry to obtain Ti 3 C 2 precipitation.

[0045] 2) Take the Ti obtained in step 1) 3 C 2 Precipitate 0.2g, disperse in 50mL deionized water, ultrasonicate at 2°C for 50min, ultrasonic power is 200W, then centrifuge at 5000rpm for 15min, remove the precipitate, take the supernatant to obtain Ti 3 C 2 nanosheet suspension.

[0046] 3) with the Ti obtained in step 2) 3 C 2 Prepared as a 2mg / mL suspension, natural rubber as a 2mg / mL emulsion, according to Ti 3 C 2 The volume ratio of nanosheet suspension and natural rubber emulsion is 6:4 to prepare a mixed solution. Ultrasound at 2°C for 20 ...

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Abstract

The invention discloses an MXene / natural rubber flexible composite film and a preparation method thereof, and belongs to the technical field of nano composite material preparation. The MXene / natural rubber flexible composite film is formed by compounding an MXene two-dimensional nano material and natural rubber. The preparation method comprises the following steps: firstly, etching an A atomic layer in M<n+1>AXn by utilizing a mixed solution of lithium fluoride and hydrochloric acid to prepare an MXene precipitate; re-dispersing the MXene precipitate in water, carrying out ultrasonic treatmentand centrifugation, removing the precipitate, and collecting the supernatant to obtain an MXene nanosheet suspension; and finally, mixing the natural rubber aqueous emulsion with the MXene nanosheetsuspension, and carrying out ultrasonic treatment, suction filtration and drying treatment to obtain the MXene nanosheet / natural rubber composite material. The preparation method disclosed by the invention is simple, does not contain an organic solvent, and has good environmental friendliness. The prepared MXene / natural rubber flexible composite film has excellent flexibility, mechanical strengthand electromagnetic wave shielding performance, the shape of the MXene / natural rubber flexible composite film can be flexibly changed, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite preparation, and in particular relates to an MXene / natural rubber flexible composite film and a preparation method thereof. Background technique [0002] MXene is a new generation of two-dimensional nanomaterials, composed of transition metal carbides, nitrides or carbonitrides (such as Ti 3 C 2 、Ti 2 C. Nb 2 C, V 2 C.Ti 3 CN and Mo 2 C, etc.), has a special structure and excellent electrical conductivity. MXenes are usually derived from metallic conductive layered M n+1 AX n It is prepared by selectively etching out the A layer in the phase, wherein M is a transition metal, A is IIIA or IVA element, X is C and / or N element, and n is equal to 1, 2 or 3. During the etching process, M n+1 x n The A atoms between the layers are replaced by various functional groups to generate MXene nanosheets with hydroxyl, oxygen or fluorine groups on the surface. [0003] MXene has broad applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08K3/14C08K3/28C08J5/18
CPCC08J5/18C08J2307/00C08K2201/011C08K3/14C08K3/28
Inventor 杨伟李浩汪林强鲁红典
Owner HEFEI UNIV
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