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Method for producing multi-layer hollow pellet or stephanoporate pellet with multi-chamber vesicle mould plate method

A technology of hollow spheres and porous spheres, applied in the preparation of microspheres, microcapsule preparations, etc., can solve the problems of unsuccessful reports and achieve the effect of easy control of the structure and simple preparation process

Inactive Publication Date: 2008-10-29
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, it can be used as a template to form a multilayer hollow sphere structure, but there has been no previous successful report

Method used

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  • Method for producing multi-layer hollow pellet or stephanoporate pellet with multi-chamber vesicle mould plate method
  • Method for producing multi-layer hollow pellet or stephanoporate pellet with multi-chamber vesicle mould plate method
  • Method for producing multi-layer hollow pellet or stephanoporate pellet with multi-chamber vesicle mould plate method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] to prepare Cu 2 O multi-layer hollow ball as an example. Dissolve 3.64 g of cetyltrimethylammonium bromide (CTAB) in 100 mL of water, then add 0.05 g of CuSO 4 ·5H 2 O, add 0.18g ascorbic acid again. The mixed solution was heated to 55°C and stirred for 20 minutes. Add NaOH solution dropwise to the above mixed solution until Cu 2 O is completely precipitated. Continue stirring for 5-10 minutes. The obtained yellow precipitate was centrifuged, washed three to five times with deionized water and absolute ethanol, and then dried at 50°C. figure 2 It is the XRD pattern of the product, which proves that the product is cuprous oxide in the cubic phase. image 3 The morphology of the product under this concentration condition is mainly single-layer hollow spheres, and there are also a small amount of double-layer, three-layer and four-layer hollow spheres. The single-layer hollow spheres have a size of 100-120 nm, while the double-layer hollow spheres have a size of 1...

Embodiment 2

[0027]Take the preparation of ZnS porous spheres and porous hollow spheres as an example. Dissolve 1-4g of cetyltrimethylammonium bromide (CTAB) in 100mL of water, then add 0.15g of Zn(CH 3 COO) 2 2H 2 O. The mixed solution was heated to 60° C. and stirred for 20 minutes. Add excess thiourea or thioacetamide solution dropwise to the above mixed solution. Continue to heat up to 90°C and stir for 2-10 hours. The obtained white precipitate was centrifuged, washed three to five times with deionized water and absolute ethanol, and then dried at 50°C. Figure 7 It is the XRD pattern of the product, which proves that the product is zinc sulfide. Figure 8 (a) and (b) are the morphology of the product under the condition of low concentration of CTAB, mainly porous spherical structure. The size of such porous spheres is 120-180nm. Figure 8 The electron diffraction pattern in (b) shows that the porous spherical structure is polycrystalline. Figure 8 (c) is a high-magnificatio...

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Abstract

The present invention relates to a hollow sphere or porous sphere preparation method through vesicle and multi-chamber vesicle template method. The preparation method is characterized in that a surface active agent forms vesicle and multi-chamber as the soft template under certain conditions; inorganic material carries out nucleus growth on the surface of the soft template so as to copy the shape of the vesicle and multi-chamber vesicle and obtain a single-layer hollow sphere and multi-layer hollow sphere structure; due to different growing ways of crystal, the formed hollow sphere can be single crystal, polycrystal or multiaperture. The surface active agent is anion surface active agent, cation active agent or a mixer of the two surface active agents. The deposited inorganic material includes oxide, sulfide, simple metal substance, selenide, hydroxid or inorganic salts, which form core and grow on the surface of the vesicle and multi-chamber vesicle and finally obtain the single-layer and multi-layer hollow sphere structure and the porous sphere structure. Cu2O and ZnS hollow sphere or porous sphere is taken as the embodiment for detailed description.

Description

technical field [0001] The invention relates to the preparation of hollow spheres and porous spheres with special structures by using multi-chamber vesicles as soft templates. The hollow spheres prepared by this method have a multilayer shell structure. Background technique [0002] Nanomaterials have attracted extensive attention due to their special physical and chemical properties that many bulk materials do not possess. In recent years, nanomaterials have also begun to be used in military defense and real life. Since the morphology, size, and structure of nanomaterials are closely related to their performance and applications, preparing various structures and effectively adjusting the structure and size are one of the research hotspots. Nanomaterials with hollow sphere structures have attracted much attention because of their broad application prospects in drug delivery, artificial cells, catalysis, chemical storage, nanoreactors, etc. There are many methods for prepa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 王文中徐浩兰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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