Preparation method of alumina porous microsphere

A technology of porous microspheres and alumina, applied in alumina/aluminum hydroxide and other directions, can solve the problems of complex process and achieve the effect of simple process

Inactive Publication Date: 2014-07-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method of alumina porous microsphere

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Embodiment 1

[0030] Embodiment 1, a kind of preparation method of aluminum oxide porous microsphere, carries out following steps successively:

[0031] 1) Dissolve 4g of sodium lauryl sulfate and 8g of OP-10 in 300g of deionized water, and continuously stir in a high-speed disperser at 1000 rpm for 60 minutes; as the water required for the emulsion method Mutually.

[0032] 2) Mix 2.377g of ethyl acetoacetate, 4.450g of aluminum sec-butoxide and 10.450g of n-octanol, and stir (1000 rpm) for 1 hour, as the oil phase required by the emulsion method.

[0033] 3) Add 0.571g Span80 and 0.571g polyvinylpyrrolidone to the oil phase obtained in step 2), and continue stirring (1000 rpm) for 1 hour to obtain a uniform and clear oil phase.

[0034] 4) Pour the obtained clear oil phase solution into the water phase in the high-speed disperser, and keep stirring (1000 rpm) for emulsification for 24 hours.

[0035] The above steps 1) to 4) are all carried out at room temperature.

[0036] 5) After va...

Embodiment 2

[0039] Change "4g sodium lauryl sulfate and 8g OP-10" in embodiment 1 into "12g sodium lauryl sulfate", and the rest are the same as embodiment 1.

[0040] The size of the obtained aluminum oxide porous microsphere is 1-3 μm, the inside of the microsphere is a closed pore structure, and the diameter of the closed pores is 300 nm-1 μm.

Embodiment 3

[0042] Change "4g sodium lauryl sulfate and 8g OP-10" into "12g of OP-10" in Example 1, and the rest are the same as Example 1.

[0043] The size of the obtained aluminum oxide porous microsphere is 5-50 μm, the inside of the microsphere is a closed pore structure, and the diameter of the closed pore is 50nm-800nm.

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Abstract

The invention discloses a preparation method of an alumina porous microsphere. The preparation method comprises the following steps: 1) dissolving a surfactant in deionized water, stirring the solution, and using the solution as a water phase; 2) mixing a chelating agent, an alumina precursor and octanol, stirring the materials, and using the mixture as an oil phase; 3) adding Span80 and a pore-forming agent to the oil phase, and stirring the materials; 4) pouring the clear oil phase obtained in the step 3) into the water phase, and continuously stirring and emulsifying the materials; 5) carrying out vacuum filtration on the product obtained in the step 4), and washing and then drying the obtained filter cake, thus obtaining the alumina porous microsphere. The microsphere has an internally closed macroporous structure and has a microsphere dimension of 1-100mu m and an internally closed pore diameter of 50nm-5mu m.

Description

technical field [0001] The invention relates to a preparation method of metal oxide porous microspheres; in particular, it relates to a preparation method of alumina porous microspheres with internal closed macropore structure. Background technique [0002] Porous microspheres have attracted more and more attention due to their advantages of low density, low thermal conductivity, large specific surface area and good fluidity. So far, although a variety of porous microspheres with internal closed cavities have been successfully developed, including polymer porous microspheres and silica porous microspheres, the preparation of metal oxide porous microspheres is still worth exploring. The problem. The new preparation process of metal oxide porous microspheres including titania, zirconia and alumina is rarely reported. So far, only a template method based on aerosol-assisted self-assembly technology has been reported to be used to prepare metal oxide porous microspheres with i...

Claims

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Application Information

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IPC IPC(8): C01F7/02
Inventor 郭兴忠蔡伟炜谢园杨辉
Owner ZHEJIANG UNIV
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