Method for modifying nanometer alumina particles by using inorganic nonmetal or metal elements

A technology of nano-alumina and metal elements, applied in the direction of nanotechnology, chemical instruments and methods, nanotechnology, etc. for materials and surface science, can solve the problem that it is difficult to flexibly adjust the chemical and physical structure of nano-alumina, and cannot be flexible Adjust the chemical and physical structure of nanoparticles, and it is difficult to further obtain nano-alumina particles, etc., to achieve the effects of improving compatibility, improving dielectric properties, and reducing the tendency of agglomeration

Inactive Publication Date: 2014-03-26
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, DuPont's aerosol process is difficult to flexibly adjust the chemical and physical structure of nano-alumina, so it is difficult to further obtain nano-alumina particles with an "alloy" structure, which can more effectively improve the dielectric properties of polymer materials
At present, there are many nano-alumina products in the domestic and foreign markets, but all the nano-alumina materials available on the market have their insurmountable disadvantages when modifying polymers, such as nano-alumina powder, which can be modified by doping. However, only mechanical blending can be used, which is difficult to achieve uniform dispersion, and the ready-made nano-alumina dispersion cannot flexibly adjust the chemical and physical structure of nanoparticles.

Method used

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  • Method for modifying nanometer alumina particles by using inorganic nonmetal or metal elements
  • Method for modifying nanometer alumina particles by using inorganic nonmetal or metal elements

Examples

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Embodiment 1

[0019] A method for modifying nano-alumina particles with inorganic non-metal or metal elements. The method is divided into three steps. The first step is to fully dissolve the alkoxy compounds of non-metal or metal elements in toluene

[0020] M[OR]n obtained partial hydrolysis product; the second step, the hydrolysis reaction of aluminum isopropoxide; the third step, adding the hydrolyzate of the first step reaction to the second step reaction to obtain modified γ-Al 2 o 3 Nanodispersion.

Embodiment 2

[0022] The method for modifying nano-alumina particles with inorganic non-metal or metal elements described in embodiment 1, the first step described:

[0023] Fully mix and dissolve different metalloid or metal element alkoxy compounds M[OR]n in toluene, the concentration of solute in the solution is less than 15w%, add an appropriate amount of catalyst, acidic catalyst such as acetic anhydride, acetic acid, formic acid, methanesulfonate Acid, basic catalysts such as ammonia water, diethylamine, ethylenediamine, etc., the amount is controlled at 0.2-2% of the solute mass, and then slowly added dropwise to the solution in the temperature range of 40-80 ℃ and under ultrasonic conditions Deionized water (dropping water for more than 2 hours), the amount of water can be adjusted in the range of 0.1 to 1.5 times the molar amount of M[OR]n according to needs, and continue to stir ultrasonically for 2 hours. The reaction principle is as follows:

[0024] Ma[OR]n 1 The hydrolysis re...

Embodiment 3

[0033] The method for modifying nano-alumina particles with inorganic non-metal or metal elements described in embodiment 1 or 2, the second step described:

[0034] The reaction of aluminum isopropoxide, the reaction steps are the same as the first step reaction, the principle is as follows:

[0035] Hydrolysis reaction: Al(OC 3 h 7 ) 3 + 2H 2 o Al(OC 3 h 7 ) (OH) 2 + 2C 3 h 7 Oh

[0036] Adjusting the amount of dripping water can adjust the degree of hydrolysis.

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Abstract

The invention relates to a method for modifying nanometer alumina particles by using inorganic nonmetal or metal elements. Nanometer alumina prepared by adopting an aerosol process in Dupont Company is used as a nanometer doped and modified high polymer material so as to improve the corona resistance performance, which achieves a great success; and an inorganic nanometer hydride polyimide film with corona resistance, namely a Kapton100CR film, is prepared and is always in a leading level in the world in recent twenty years. The method for modifying nanometer alumina particles by using inorganic nonmetal or metal elements comprises the following steps of: 1, fully dissolving a hydrocarbyloxy compound M[OR]n of the inorganic nonmetal or metal elements in toluene to obtain partial hydrolysate; 2, carrying out hydrolysis reaction on aluminum isopropoxide; and 3, adding the hydrolysate obtained through the reaction in the step 1 to a modified gamma-Al2O3 nanometer alumina particle dispersion obtained in the step 2. The method is used for modifying high polymer materials.

Description

Technical field: [0001] The invention relates to a modified nanometer material, in particular to a method for modifying high polymer nano-alumina particles modified with inorganic non-metallic or metal elements. Background technique: [0002] DuPont used aerosol technology to prepare nano-alumina for nano-doping modified polymer materials to improve its corona resistance performance, and achieved great success, and made a corona-resistant inorganic nano-hybrid polyimide Amine film - Kapton 100CR film, has been at the leading level in the world for nearly two decades. However, DuPont's aerosol process is difficult to flexibly adjust the chemical and physical structure of nano-alumina, so it is difficult to further obtain nano-alumina particles with an "alloy" structure, which can more effectively improve the dielectric properties of polymer materials. At present, there are many nano-alumina products in the domestic and foreign markets, but all the nano-alumina materials avai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06B82Y30/00B82Y40/00C08K9/02C08K3/22
Inventor 范勇陈昊周宏
Owner HARBIN UNIV OF SCI & TECH
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