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Method for preparing hollow-structured nano-organosilicon microspheres

A nano-organosilicon and hollow structure technology, applied in the field of materials, can solve problems such as complex preparation process and shell material damage, and achieve the effect of avoiding cumbersome process, avoiding residue problems, and avoiding material waste

Active Publication Date: 2017-01-04
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this process, not only the preparation process is complicated, but also it will inevitably cause different degrees of damage to the shell material.

Method used

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  • Method for preparing hollow-structured nano-organosilicon microspheres
  • Method for preparing hollow-structured nano-organosilicon microspheres
  • Method for preparing hollow-structured nano-organosilicon microspheres

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preparation example Construction

[0042] The method for preparing nano-organosilicon microspheres with a hollow structure according to an embodiment of the present invention uses a silane coupling agent as a raw material. During the preparation process, by using a hydrothermal method, a multilayer hollow microsphere can be formed at one time without adding a template, thereby It avoids the material waste and cumbersome process of eroding the template, and at the same time, there is no need to add an emulsifier in the system, so the residual problem of the emulsifier in the subsequent treatment is avoided. In addition, the structure of the silicon microsphere can be adjusted by adjusting the experimental conditions, and the obtained hollow Structural nano-organosilicon microspheres can meet the needs of various purposes.

[0043] refer to figure 2 , the method for preparing hollow nano-organosilicon microspheres according to an embodiment of the present invention further includes:

[0044] S400: pre-dispersed...

Embodiment 1

[0048] 1) Preparation of silane coupling agent dispersion: mix 5g of silane coupling agent A151 with 300ml of deionized water, stir with a homogenizer, set the stirring speed at 200r / min, so that silane coupling agent A151 is evenly dispersed in the water phase neutralized and hydrolyzed for 2 hours to obtain a silane coupling agent dispersion;

[0049] 2) Preparation of monodisperse silicone solid spheres: add ammonia water to the obtained dispersion liquid, wherein the concentration of ammonia water is 0.1wt%, the dropping rate of ammonia water is 0.5ml / min, and the total amount of dropping is 0.5ml, and then After 20 minutes of reaction, monodisperse silicone solid balls can be formed;

[0050] 3) Preparation of hollow silicon microspheres: Transfer the obtained silicone solid sphere dispersion into a hydrothermal reaction kettle, react at 180°C for 12 hours, and cool naturally to obtain hollow nano-structure silicone microspheres (such as image 3 ).

Embodiment 2

[0052] 1) Preparation of silane coupling agent dispersion: mix 10g of silane coupling agent A151 with 300ml of deionized water, and stir with a homogenizer, set the stirring speed to 400r / min, so that the silane coupling agent A151 is evenly dispersed in the water phase neutralized and hydrolyzed for 2 hours to obtain a silane coupling agent dispersion;

[0053] 2) Preparation of monodisperse silicone solid spheres: add ammonia water to the obtained dispersion liquid, wherein the concentration of ammonia water is 0.5wt%, the dropping rate of ammonia water is 0.8ml / min, and the total amount of dropping is 1.5ml, and then After 20 minutes of reaction, monodisperse silicone solid balls can be formed;

[0054] 3) Preparation of hollow silicon microspheres: transfer the obtained silicone solid sphere dispersion into a hydrothermal reaction kettle, react at 190°C for 12 hours, and cool naturally to obtain hollow nano-structure silicone microspheres (such as Figure 4 ).

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Abstract

The invention discloses a method for preparing a nanometer organic silicon microsphere with a hollow structure. The method comprises the following steps: (1) mixing a silane coupling agent with water to obtain silane coupling agent dispersion liquid; (2) adding ammonia water into the silane coupling agent dispersion liquid obtained in step (1) to obtain a monodisperse organic silicon solid sphere; (3) carrying out hydrothermal treatment on the organic silicon solid sphere obtained in step (2) to obtain the nanometer organic silicon sphere with the hollow structure. According to the method for preparing the nanometer organic silicon microsphere with the hollow structure, disclosed by the embodiment of the invention, the surface appearance of the nanometer organic silicon microsphere with the hollow structure can be kept complete.

Description

technical field [0001] The invention belongs to the field of materials, in particular, the invention relates to a method for preparing hollow-structured nano-organosilicon microspheres. Background technique [0002] In recent years, hollow spherical nanostructured materials have attracted widespread attention because of their special structure and morphology, and the research on this kind of hollow microspheres has achieved remarkable results in terms of different sizes, shapes, structures, and surface properties. the results. Hollow spheres have the characteristics of low density, high specific surface area, and low expansion coefficient, so they have great application potential in catalysts, refractive surface coatings, rechargeable batteries, lithium batteries, and drug delivery and sustained release. For example, micelles, vesicles, hydrogels, etc. prepared from functional polymers, and SiO 2 , Fe 3 o 4 , Au and other inorganic nanoparticles. Due to good biocompatib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02
Inventor 谢续明万贤
Owner TSINGHUA UNIV
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