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Novel nano-fluid and its preparation method and application thereof

A nanofluid, a new type of technology, applied in chemical instruments and methods, fibrous fillers, dyed low-molecular organic compound treatment, etc., can solve problems such as weak physical affinity, not the best effect, and difficult application of direct modification. The preparation method is simple and easy, and the processing performance is improved

Inactive Publication Date: 2015-07-01
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above-mentioned studies are all through a series of grafting and substitution reactions to obtain nanofluids, which only stay at the level of changing the appearance of inorganic nanoparticles. The modified nanoparticles only have the characteristic of fluids due to the lack of functional groups on the chain segments. It is difficult to apply further direct modification. When directly applied to composite materials, coupling agent molecules can only form weak physical affinity with polymer molecules, and the effect is not optimal.

Method used

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  • Novel nano-fluid and its preparation method and application thereof
  • Novel nano-fluid and its preparation method and application thereof
  • Novel nano-fluid and its preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: Preparation of novel nanofluid

[0049] (1) Weigh 1.67g of 30wt% silica aqueous solution (purchased from Sigma-Aldrich) with an average particle size of 7nm and dilute it in 75ml of water (use sodium hydroxide to adjust the pH of the solution to 12), sonicate for 1h; Dissolve 0.59g of γ-glycidyl ether propoxytrimethoxysilane coupling agent (purchased from Aladdin Reagent Company) in 40ml of ethanol, then pour it into the above-mentioned sonicated silica solution, and stir at 70°C for reaction , after 6h, the reaction is complete, and the reaction solution of nano-silica / epoxy coupling agent is obtained. For the reaction mechanism, see figure 1 .

[0050] (2) Weigh and add 0.51g of tri-n-butylamine and 0.27g of concentrated hydrochloric acid with a concentration of 36.5wt% to the nano-silica / epoxy coupling agent reaction solution in step (1), stir and react at a constant temperature of 70°C , after 24 hours of reaction, the reaction solution of nano-silic...

Embodiment 2

[0053] Embodiment 2: Preparation of novel nanofluid

[0054] (1) Weigh 1.67g of 30wt% silica aqueous solution (purchased from Sigma-Aldrich) with an average particle size of 7nm and dilute it in 75ml of water (use sodium hydroxide to adjust the pH of the solution to 12), sonicate for 1h; Dissolve 0.59g of γ-glycidyl ether propoxytrimethoxysilane coupling agent (purchased from Aladdin Reagent Company) in 40ml of ethanol, then pour it into the above-mentioned sonicated silica solution, and stir at 70°C for reaction , after 6h, the reaction is complete, and the reaction solution of nano-silica / epoxy coupling agent is obtained. For the reaction mechanism, see figure 1 .

[0055] (2) Weigh and add 0.51g of tri-n-butylamine and 0.27g of concentrated hydrochloric acid with a concentration of 36.5wt% to the nano-silica / epoxy coupling agent reaction solution in step (1), stir and react at a constant temperature of 70°C , after 24 hours of reaction, the reaction solution of nano-silic...

Embodiment 3

[0057] Embodiment 3: Preparation of novel nanofluid

[0058] (1) Weigh 1.67g of a 30% silica solution with an average particle size of 7nm and dilute it in 5ml of water, ultrasonicate for 1h, and add 5.0g of γ-glycidyl ether propoxymethoxydiethoxysilane coupling agent Dissolve it in 40ml of ethanol, then pour it into the sonicated silicon dioxide aqueous solution, stir and react at a constant temperature at 80°C, and the reaction is complete after 4 hours to obtain a nanometer silicon dioxide / epoxy coupling agent reaction solution.

[0059] (2) Weigh and add 2.55g of tri-n-butylamine and 1.35g of concentrated hydrochloric acid with a mass concentration of 36.5% to the nano-silica / epoxy coupling agent reaction solution in step (1), stir and react at a constant temperature of 80°C , after reacting for 1 hour, the reaction liquid of nano-silica / ammonium salt organic ions was obtained.

[0060] (3) Add 2.04g of C 9 h 19 -(C 6 h 4 )-(OCH 2 CH 2 ) 10 -O(CH 2 ) 3 SO 3 – K...

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Abstract

The invention belongs to the technical field of modified inorganic nanometer functional materials and discloses a novel nano-fluid and its preparation method and an application thereof. The preparation method comprises the following specific steps: dissolving inorganic nanoparticles in water, adjusting pH to alkaline by adding alkali, carrying out ultrasound, adding the inorganic nanoparticle solution into a silane coupling agent ethanol solution to react for 4-48h so as to obtain a nanoparticle solution containing epoxy functional groups; adding tertiary amine and hydrochloric acid to react for 1-48h, adding polyoxyethylene ether sulfonate to react for 1-48h, and purifying to obtain the novel nano-fluid. The novel nano-fluid is a fluid-like shape. Processability of nanoparticles is raised. The novel nano-fluid also can be used as a special solvent and a reaction medium. The preparation method is simple and easy to operate. Modified nanoparticles will not be agglomerated. Physicochemical properties of nanoparticle kernel are still retained, and nano-fluids with different properties can be obtained by adjusting the type of inorganic nanoparticles and polymerization degree of polyoxyethylene ether sulfonate.

Description

technical field [0001] The invention belongs to the technical field of modified inorganic nanometer functional materials, and in particular relates to a novel nanofluid and its preparation method and application. Background technique [0002] Nano-inorganic particles have excellent special properties such as light, force, electricity, heat, magnetism, radiation, and absorption. They have unique characteristics in many disciplines and fields and play an irreplaceable role. Large, very easy to agglomerate, the dispersion stability of the particles must be improved through surface modification. The surface modification of inorganic nanoparticles can be divided into two categories: surface chemical modification and physical modification. Physical modification makes the particles difficult to agglomerate by adsorbing surfactants on the surface of inorganic particles. However, research and practice have shown that the grafted amount of high molecular organic matter on the surface...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/00C09C3/12C09C3/08C09C3/10C09C1/28C09C1/04C09C1/24C09C1/36C09C1/02C08G18/48C08K9/06C08K3/22C08K3/36C08K3/26C08J5/18
Inventor 邱志明易小龙严玉蓉
Owner SOUTH CHINA UNIV OF TECH
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