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Controllable-morphology high-porosity porous ceramic membrane supporting body and preparation method thereof

A technology of porous ceramic membrane and high porosity, which is applied in the field of high-porosity porous ceramic membrane support and its preparation, can solve the problems of uncontrollable pore size of the support, insufficient pure water flux, and insufficient porosity, etc. Excellent chemical stability, excellent thermal stability, high porosity effect

Inactive Publication Date: 2015-07-15
GUANGZHOU HKUST FOK YING TUNG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common defects of the above ordinary ceramic membrane supports are: the porosity is not small enough, the pure water flux is not large enough, and the shape is uncontrollable, resulting in uncontrollable pore size of the support

Method used

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  • Controllable-morphology high-porosity porous ceramic membrane supporting body and preparation method thereof
  • Controllable-morphology high-porosity porous ceramic membrane supporting body and preparation method thereof
  • Controllable-morphology high-porosity porous ceramic membrane supporting body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This example illustrates a method for preparing ceramic powder material / polymer composite fibers.

[0045] Weigh N, N-dimethylformamide (DMF) and ethanol (EtOH) to prepare a mixed solvent at a mass ratio of 1:2.

[0046] Weigh 1.6g of halloysite nanotubes (HNTs) into 17.6g of the above mixed solvent, and ultrasonically disperse until there is no agglomeration. Then add 2.4g of polyvinylpyrrolidone (PVP) and mix thoroughly to obtain a uniform spinning solution.

[0047] The prepared spinning solution was placed in a disposable syringe with a needle inner diameter of 0.4 mm for electrospinning. The electrospinning voltage was set at 5KV, the solution pumping speed was 30 μl / min, the distance from the needle to the collection drum was 10 cm, and the rotation speed of the collection drum with a diameter of 10 cm was 2000 rpm.

[0048] Observing the obtained composite fiber by scanning electron microscope, we can get Figure 1(a). It can be seen from the figure that the PVP...

Embodiment 2

[0053] This example illustrates a method for preparing a ceramic material precursor / polymer composite fiber.

[0054] Weigh 2.4g of polyvinylpyrrolidone (PVP) into 12g of ethanol (EtOH), and mix well. Then add 1.6 g of isopropyl titanate and mix thoroughly to obtain a uniform spinning solution.

[0055] The prepared spinning solution was placed in a disposable syringe with a needle inner diameter of 0.4 mm for electrospinning. The electrospinning voltage was set at 10KV, the solution pumping speed was 30 μl / min, the distance from the needle to the collection drum was 12 cm, and the rotation speed of the collection drum with a diameter of 10 cm was 40 rpm. The obtained isopropyl titanate / PVP composite fiber membrane was observed by scanning electron microscope, and obtained figure 2 .

Embodiment 3

[0057] This example illustrates a method for preparing ceramic powder material / polymer composite fibers.

[0058] Water and ethanol (EtOH) were weighed to prepare a mixed solvent with a mass ratio of 5:3.

[0059] Weigh 2.4g of nanometer aluminum oxide (Al 2 o 3 ) was added to 24 g of the above mixed solvent, and ultrasonically dispersed to a non-agglomerated state. Then add 2.4g of polyvinylpyrrolidone (PVP) and mix thoroughly to obtain a uniform spinning solution.

[0060] The prepared spinning solution was placed in a disposable syringe with a needle inner diameter of 0.4 mm for electrospinning. The electrospinning voltage was set at 10KV, the solution pumping speed was 30 μl / min, the distance from the needle to the collection drum was 12 cm, and the rotation speed of the collection drum with a diameter of 10 cm was 40 rpm. will get Al 2 o 3 / PVP composite fiber membrane was observed by scanning electron microscope, and obtained image 3 .

[0061] The above-mention...

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Abstract

The invention relates to a controllable-morphology high-porosity porous ceramic membrane supporting body and a preparation method thereof. Electrostatic spinning is used for preparation of a ceramic material / polymer micro / nano composite fiber, and a new method for directly sintering a composite fibrofelt into ceramics is used for preparation of the controllable-morphology high-porosity porous ceramic membrane supporting body. Compared with a method for construction and preparation of high-penetration ceramic supporting body by using a ceramic fiber, the preparation method has no need of secondary sintering, the process flow can be simplified, energy consumption can be saved, and moreover, the shape and micro-morphology of the supporting body can be controlled. By regulating electrostatic spinning parameters, the diameter of the composite fiber can be controlled to be nano or micron level and the fiber stacking density can be controlled, so as to control the microstructure of the ceramic membrane supporting body, and thus the pore size and porosity of the supporting body can be controlled. With use of the new preparation route, the high-porosity porous ceramic membrane supporting body having the pore size of 0.1-10 [mu]m, the porosity of 50-85% and the pure water flux of 1700-2500 L / m<2>.h under the pressure of 0.5 bar is obtained.

Description

technical field [0001] The invention relates to a high-porosity porous ceramic membrane support body and a preparation method thereof, in particular to a shape-controllable high-porosity ceramic membrane support body and a preparation method thereof. Background technique [0002] Due to the advantages of high temperature resistance, good chemical stability, high filtration efficiency, and easy cleaning and regeneration, porous ceramic membranes are increasingly widely used in petrochemical, food, medicine, metallurgy, bioengineering and other industries, especially in the It plays a key role in energy, water resources and the environment. [0003] The porous ceramic membrane can be regarded as a porous gradient material, which is composed of a porous ceramic membrane support, an intermediate layer and a membrane layer. The support is the basis for the preparation and application of the porous ceramic membrane, and its function is to provide sufficient The mechanical strengt...

Claims

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Application Information

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IPC IPC(8): C04B35/622
Inventor 张莉张哲明吴景深曾嘉莹陈海滨
Owner GUANGZHOU HKUST FOK YING TUNG RES INST
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