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A kind of mxene-based solvent-free nanofluid and preparation method thereof

A nanofluid, solvent-free technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems such as MXene-based solvent-free nanofluid preparation methods and properties that have not been reported, and achieve improvement Processing and application performance, high stability, and the effect of improving barrier performance

Active Publication Date: 2021-10-22
陕西道博飞科新材料技术有限公司
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  • Claims
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Problems solved by technology

As a graphene-like two-dimensional material, the preparation methods and properties of MXene-based solvent-free nanofluids have not been reported yet.

Method used

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  • A kind of mxene-based solvent-free nanofluid and preparation method thereof
  • A kind of mxene-based solvent-free nanofluid and preparation method thereof

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preparation example Construction

[0042] Preparation method of the present invention sees attached figure 1 (Take organosilane SID 3392.0 as an example):

[0043] The main component is MXene, the neck layer is organic silane SID 3392.0, and the crown layer is organic oligomer.

[0044] The MXene nanosheet Ti 3 C 2 T x , average size ≤ 100nm.

[0045] The organosilane used was dichloride, SID 3392.0.

[0046] The outer oligomer (coronal layer) is 4-nonylphenol-polyvinyl ether potassium sulfonate (PEGS).

[0047] The method for preparing MXene nanosheets is as follows:

[0048] a) LiF and HCl (9mol / L) with a molar ratio of 1:1 were stirred for 5 minutes to fully dissolve to obtain a solution.

[0049] b) Add 1g Ti 3 AlC 2 Add to the solution obtained in a, and stir at 25°C for 24h to obtain an acidic mixed solution B.

[0050] c) The above solution B was repeatedly washed with deionized water (5000rmp / min), centrifuged, and the supernatant was poured until the pH of the supernatant was 7, and the lower...

Embodiment 2

[0057] a) MXene (Ti 3 C 2 Tx) Preparation of nanosheets: 1.6 g of LiF was mixed with 20 mL of HCl solution (9 mol / L), and stirred for 5 min to fully dissolve. Then add 1g of precursor raw material Ti 3 AlC 2 , and stirred at 25°C for 24h to obtain an acidic mixed solution. This solution was repeatedly washed with deionized water, centrifuged (5000rmp / min), and the supernatant was poured until the pH of the supernatant=7, the lower layer of sediment was removed, and freeze-dried for 48h to obtain MXene (Ti 3 C 2 T x )Nanosheets.

[0058] b) Use the organosilane N,N-didecyl-N-methyl-N-(3-trimethoxysilylpropyl)ammonium chloride (decacinium chloride, SID 3392.0) as the neck layer, adding 0.05 g of MXene (Ti 3 C 2 T x ) nanosheets are dispersed in the aqueous solution, add 0.1~0.1.0mL SID 3392.0 (30% aqueous solution), stir at 60℃~70℃ for 24 hours, the silane is hydrolyzed and linked to MXene(Ti 3 C 2 Tx) on the surface of nanosheets, the coronal layer adopts organic ol...

Embodiment 3

[0060] a) Preparation of MXene nanosheets: 1.6 g of LiF was mixed with 20 mL of HCl solution (9 mol / L), and stirred for 5 min to fully dissolve. Then add 1g of precursor raw material Ti 3 AlC 2 , and stirred at 25°C for 24h to obtain an acidic mixed solution. This solution was repeatedly washed with deionized water (5000rmp / min), centrifuged, and the supernatant was poured until the pH of the supernatant was 7, the lower layer of precipitate was removed, and MXene (Ti 3 C 2 T x )Nanosheets.

[0061] b) Preparation of neck layer-corona layer: Add 1.4g organosilane KH560 and 12g DOPO-based organic oligomer of corona layer into a 250mL three-necked flask, and add 120mL methanol to ultrasonically disperse evenly, condense and reflux at 50°C under magnetic stirring After 24 hours, the reaction was stopped, cooled to room temperature, and the outer layer solution was obtained.

[0062] c) 0.25g of MXene (Ti 3 C 2 Tx) The nanosheets are added to the above solution, and the st...

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Abstract

The invention relates to an MXene-based solvent-free nanofluid and a preparation method thereof. Using a surface chemical engineering method, organosilane is grafted on the surface of MXene nanosheets as a neck layer, and an organic oligomer is used as a crown layer. The neck layer and the neck layer are The coronal layers are linked by covalent bonds or ionic bonds to prepare MXene-based solvent-free nanofluids. The nanofluid has a stable structure and exhibits macroscopic liquid behavior at room temperature, which solves the problem of easy agglomeration of MXene nanosheets. The preparation method of the MXene-based solvent-free nanofluid prepared by the present invention is simple and easy, and the cost is low. It has both the excellent physical and chemical properties of the MXene nanosheet itself and the fluidity of the fluid. Enhance the mechanical properties of polymer-based composites, improve the barrier properties of coatings, etc.

Description

technical field [0001] The invention belongs to the field of nanofluids, and relates to an MXene-based solvent-free nanofluid and a preparation method thereof, which can be used as nanofillers in the fields of flame-retardant materials, polymer-based composite material modifiers, paint protective layers, and the like. Background technique [0002] MXene is a new type of two-dimensional transition metal carbide or carbonitride, which has a two-dimensional structure similar to graphene. In 2011, Professor Gogotsi of Drexel University in the United States selectively etched away the A element in the MAX phase. prepared. Its chemical formula is M n+1 x n T x , n=1, 2, 3, where M is an early transition metal element, X is carbon or nitrogen, and T is an active functional group such as -OH, -O linked to the surface. Because of its unique two-dimensional layered structure, large specific surface area, excellent mechanical properties, and easy surface functionalization, it can b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/12C09C3/04C09K21/12C09K21/06C09K21/14C09K21/02B82Y30/00B82Y40/00C08K9/04C08K9/06C08K3/14C08K7/00C09D7/62
CPCB82Y30/00B82Y40/00C01P2004/64C08K3/14C08K7/00C08K9/04C08K9/06C08K9/08C08K2201/011C09C1/36C09C3/04C09C3/12C09K21/02C09K21/06C09K21/12C09K21/14C09D7/62C09D7/70
Inventor 郑亚萍王德超
Owner 陕西道博飞科新材料技术有限公司
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