Unlock instant, AI-driven research and patent intelligence for your innovation.

High compatibility nano aluminum oxide and micro-emulsification phase transition preparation

A technology of nano-alumina and micro-emulsion, which is applied in the direction of chemical instruments and methods, inorganic pigment treatment, heat exchange materials, etc., can solve the problems of chemical and physical structure instability, ineffective modification, uneven chemical structure, etc. problems, to achieve the effect of improving heat resistance, enhancing thermal conductivity, and increasing thermal conductivity

Inactive Publication Date: 2012-07-25
HARBIN UNIV OF SCI & TECH
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of inorganic nano-alumina has always been the sol-gel method, but the chemical structure of the sol-gel method is not uniform, and the chemical and physical structure is unstable, so it brings difficulties to the doping process. Generally, the weight percentage of doping is different. More than 10%, the effect of modification is not obvious

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The micro-emulsion phase transition preparation method of high-compatibility nano-alumina, firstly prepare aluminum alkoxide micro-emulsion, under ultrasonic and strong stirring, add 1 part of the mixture of water and emulsifier dropwise, wherein the ratio of water to emulsifier is 1 : 3~12, after more than 12 hours of strong high-speed stirring, it will form a micro-emulsion state, and keep the micro-emulsion zone from liquid phase to nano-scale coagulation phase.

Embodiment 2

[0016] Micro-emulsion phase transition preparation method of highly compatible nano-alumina, take 1 part of aluminum alkoxide, dissolve it with 8-10 parts of toluene, add 0.1 part of acetic acid after heating to 80 °C, and add 1 part dropwise under ultrasonic and strong stirring. A mixture of parts of water and emulsifier, wherein the ratio of water to emulsifier is 1:3 to 12, after 12 hours of strong high-speed stirring to form a micro-emulsion state, and then adding 1.5 parts of ethyl acetate under ultrasonic and strong high-speed stirring , 80 ℃ of heat preservation reaction 24-48 hours later load airtight autoclave, rise to 140-160 ℃ of heat preservation 24-36 hours with the heating rate of one degree per minute, then be warmed up to 180-220 ℃ of heat preservation reaction 2-5 days. Cool down and take out after cooling, extract the acetic acid, ethyl acetate and emulsifier in it with ether, and vacuum and concentrate to obtain the product with an alumina concentration of 10...

Embodiment 3

[0018] The high compatibility nano-alumina prepared by the above micro-emulsion phase transformation preparation method, the obtained product can be observed under the microscope that the formed alumina exists in the state of nanoparticles, and its average particle size is about 8-10 nm. At a temperature of 10-15 °C, the alumina in the concentrate remains stable for several days in a single nanoparticle state without agglomeration, and the fluidity remains unchanged.

[0019] The composition of the compound and its content range: Al n O 1-12n (H 2 O) 0.1-0.3n Na 0.003n K 0.004n , examples of compounds with different contents: (1) When the ratio of water to emulsifier is 1:12, Al n O 1-1.1n (H 2 O) 0.2-0.3n Na 0.003n K 0.004n , when the ratio of water to emulsifier is 1:3, Al n O 1-1.1n (H 2 O) 0.1-0.2n Na 0.003n K 0.004n .

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to nano aluminum oxide with high compatibility and a micro-emulsified phase variation preparation method thereof. Inorganic nano aluminum oxide is prepared by adopting a sol-gal process all the time, but the sol-gal process has uneven chemical structure as well as unstable chemical and physical structures, so that difficulty is brought to the doping process, the weight percentage of the doping is generally less than or equal to 10%, and the modification effect is not obvious. Alkoxide micro-emulsified solution of aluminum is firstly prepared and is dripped with one part of mixture of water and emulsifier under the conditions of ultrasound and intense agitation, wherein, the proportion between the water and the emulsifier is 1:3-12; after 12 hours of strong high speedagitation, the mixture forms a micro-emulsified state, and a micro-emulsified area is maintained to be transformed into a solidifying phase with nanometer level from a liquid phase. The invention canbe applied to the technical field of material science, and is used for the category of the preparation technology inorganic nanophase materials.

Description

Technical field: [0001] The invention relates to a high-compatibility nano-alumina and a preparation method thereof through micro-emulsion phase transformation. Background technique: [0002] Inorganic nanocomposite polymer materials are an important research direction of special high-performance polymer materials, and the use of inorganic nano-alumina composite polymer materials is an effective method to improve the corona resistance and thermal conductivity of polymer materials. The preparation of inorganic nano-alumina has always been by the sol-gel method, but the chemical structure of the sol-gel method is not uniform, and the chemical and physical structures are unstable, so it brings difficulties to the doping process. Generally, the weight percentage of doping is different. More than 10%, the effect of modification is not obvious. Invention content: [0003] The purpose of the present invention is to provide a kind of high-compatibility nano-alumina, and its prepa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09C3/00C09C1/40C09K5/06
Inventor 范勇周宏李娟陈昊
Owner HARBIN UNIV OF SCI & TECH