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Method for preparing mesoscopic material with controllable appearance

A technology of morphology and gas tube, which is applied in the field of preparation of mesoscopic materials with controllable morphology, can solve the problems of inability to control pore size and structure, limited types of phase separation agents and surfactants, and achieve production costs Low, no environmental pollution, easy to obtain raw materials

Inactive Publication Date: 2009-11-18
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited selection of phase separation agents and surfactants, the control of pore size and structure cannot be achieved
Therefore, how to prepare large-scale and controllable mesoporous hollow microspheres using a template-free method is still a challenging issue.

Method used

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  • Method for preparing mesoscopic material with controllable appearance
  • Method for preparing mesoscopic material with controllable appearance
  • Method for preparing mesoscopic material with controllable appearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, bubble generating device

[0037] The special device used in the method for preparing mesoscopic materials with controllable morphology provided by the present invention is a bubble generating device, such as figure 1 As shown, it consists of a three-layer casing including an inner gas pipe 1, an outer gas pipe 3 and a liquid inlet pipe 2, wherein the inner gas pipe 1 is located in the chamber of the liquid inlet pipe 2, and the liquid inlet pipe 2 is located in the outer gas pipe Inside the tube 3 lumens.

[0038] In the above-mentioned bubble generating device, the distance between the inner gas pipe 1 and the liquid inlet pipe 2 is greater than 0 and less than 2 cm. The device may also include a curing channel 4 , the inlet of the curing channel 4 is connected to the gas outlets of the inner gas tube 1 and the outer gas tube 3 .

Embodiment 2

[0039] Embodiment 2, preparation of silica hollow spheres

[0040] The foaming type surfactant SDS (sodium dodecyl sulfate) of 1 weight part, the water of 100 weight parts, the 2M hydrochloric acid of 2 weight parts are mixed homogeneously, then add the tetraethyl orthosilicate of 20 weight parts, reaction 2 After one hour, inject bubbles into the bubbling device, the external air velocity is 400L / h, the internal air velocity is 10L / h, and react at 200°C in a 1m long, 6cm thick glass column, receive it with a flask, and A white powder was collected.

[0041] Hollow spheres of about 120nm can be seen under the transmission electron microscope.

Embodiment 3

[0042] Embodiment 3, preparation of silica hollow spheres

[0043] The foaming type surfactant SDS (sodium dodecyl sulfate) of 1 weight part, the water of 100 weight parts, the 2M hydrochloric acid of 2 weight parts are mixed homogeneously, then add the tetraethyl orthosilicate of 20 weight parts, reaction 2 After one hour, inject bubbles into the bubbling device, the external air velocity is 250L / h, the internal air velocity is 40L / h, and react at 250°C in a 1m long, 6cm thick glass column, receive it with a flask, and A white powder was collected.

[0044] Hollow spheres of about 150nm can be seen under the transmission electron microscope.

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Abstract

The invention discloses a method and a special device for preparing a mesoscopic material with a controllable appearance. The device comprises three sleeved pipes, i.e. an inter gas pipe, an outer gas pipe and a liquid inlet pipe and further comprises a solidified channel, wherein the inner gas pipe is positioned in the cavity of the liquid inlet pipe; and the liquid inlet pipe is positioned in the cavity of the outer gas. The method for preparing a mesoscopic material with a controllable appearance comprises the following steps: (1) adding foaming surface active agent into water, uniformly stirring, adding shell preformed polymer, uniformly stirring and reacting to obtain a precursor solution; and (2) injecting the precursor solution into the liquid inlet pipe of the special device to generate air bubbles at the air outlet of the inner gas pipe, frothing by the outer gas pipe, and solidifying the bubbles. Continuous preparation of hollow microballoon spheres, nano-plates and nano-granules can be realized through adjusting the airflow speed of frothing. The method can continuously prepare the mesoscopic material in large scale in one step, has strong controllability for the shape and the function of the material, simple and convenient process, no environment pollution, low production cost and wide application range and can fully satisfy the industrial requirement.

Description

technical field [0001] The invention relates to a method for preparing a mesoscopic material with controllable morphology and a special device thereof. Background technique [0002] Since researchers from Mobil Corporation successfully synthesized MCM-41 mesoporous molecular sieves in 1992, mesoporous materials with a single pore size, high specific surface area and porosity have attracted extensive attention from the scientific community (C.T.Kresge, M.E.Leonowicz , W.J.Roth, J.C.Vartuli, J.S.Beck, "Ordered mesoporousmolecular sieves synthesized by a liquid crystal template mechanism", Nature 1992, 359, 710). Now people can not only use different template molecules to control the shape and size of the pores, but also prepare mesoporous materials with different shapes to meet the needs of applied research. Mesoporous materials with special shapes such as mesoporous films, fibers, nano and microspheres, bulk materials and "single crystals" have been synthesized by controllin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/18C01G23/047C01G33/00C01G35/00B81C5/00B81C99/00
Inventor 杨振忠余响林刘继广屈小中
Owner INST OF CHEM CHINESE ACAD OF SCI
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