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Microfluidic preparation method of ZrO2/PS hybrid microspheres as well as product and application of same

A hybrid microsphere and microfluidic technology, applied in microsphere preparation, chemical instruments and methods, and methods for obtaining spatial resolution, etc., can solve the problems of poor processing performance, low imaging contrast, low refractive index, etc., and achieve excellent Processing performance, improved resolution, effects of controlled refractive index

Pending Publication Date: 2022-02-18
CHONGQING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these single-component pure inorganic microspheres or polymer microspheres still have problems such as poor processability or low refractive index, and their application in the process of real-time super-resolution imaging will cause the problem of low imaging contrast, thus limited in practical applications

Method used

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  • Microfluidic preparation method of ZrO2/PS hybrid microspheres as well as product and application of same
  • Microfluidic preparation method of ZrO2/PS hybrid microspheres as well as product and application of same
  • Microfluidic preparation method of ZrO2/PS hybrid microspheres as well as product and application of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] a ZrO 2 The microfluidic preparation method of / PS hybrid microspheres, the specific preparation method comprises the following steps:

[0037] (1) Preparation of oil-soluble ZrO2 Nanoparticles: 5.6g of zirconium (IV)-isopropanol complex and 55ml of anhydrous benzyl alcohol were added to a 100ml polytetrafluoroethylene autoclave, and after it was sealed, the reactor was placed in React in an oven at 240°C for 4 days to get ZrO 2 Benzyl alcohol solution; the resulting ZrO 2 After centrifugation of the benzyl alcohol solution, the solid precipitate was ZrO 2 Nanoparticles were washed with absolute ethanol and centrifuged again, and the washing-centrifugation process was carried out 3 times to obtain purified ZrO 2 nanoparticles; the purified ZrO 2 The nanoparticles were dispersed in tetrahydrofuran (THF) solution dissolved with methacryloxypropyltrimethoxysilane (MPS) (wherein methacryloxypropyltrimethoxysilane (MPS) was mixed with ZrO 2 The mole of nanoparticles is ...

Embodiment 2

[0043] The flow rate of the dispersed phase solution in the focused microfluidic channel in Example 1 was changed to 5 μL / min and 8 μL / min respectively, and the other preparation methods were the same as in Example 1 to prepare ZrO with different particle sizes 2 / PS hybrid microspheres. When the flow rate of the dispersed phase solution is 5 μL / min, its SEM image is as follows image 3 As shown, the average particle size is 27 μm; when the flow rate of the dispersed phase solution is 8 μL / min, its SEM image is as follows Figure 4 As shown, the average particle size is 26 μm.

Embodiment 3

[0045] Change the flow rate of the dispersed phase solution in the focused microfluidic channel of Example 1 to 8 μL / min, and the flow rate of the polyvinyl alcohol (PVA) continuous phase solution to 30 μL / min, and the other preparation methods are the same as in Example 1. Prepare Obtain ZrO with an average particle size of 31 μm 2 / PS hybrid microspheres, the SEM image is as follows Figure 5 shown.

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Abstract

The invention relates to a microfluidics preparation method of ZrO2 / PS hybrid microspheres as well as a product and application of the of same and belongs to the technical field of hybrid microsphere preparation. According to the preparation method, a dichloromethane solution in which a silane coupling agent methacryloxypropyltrimethoxysilane (MPS) is dissolved and modified ZrO2 nanoparticles and polystyrene (PS) are used as a dispersion phase, a polyvinyl alcohol (PVA) aqueous solution is used as a continuous phase, and therefore, the ZrO2 / PS hybrid microspheres are prepared through a focused microfluidic channel. The modified ZrO2 nanoparticles and a polymer matrix (PS) have good compatibility and can be uniformly distributed in the microspheres, so that the prepared ZrO2 / PS microspheres have good optical transparency, and the refractive index of the hybrid microspheres is increased along with the increase of the content of the doped ZrO2 nanoparticles. The material has more excellent processability and controllable refractive index than single-component microspheres, and has a wider application prospect in the field of super-resolution imaging.

Description

technical field [0001] The invention belongs to the technical field of hybrid microsphere preparation and relates to a ZrO 2 Microfluidic preparation method of / PS hybrid microspheres and its products and applications. Background technique [0002] Optical microscopes can be used to observe the topographic features of the object surface, however, due to Abbe’s diffraction limit, traditional optical microscopes cannot resolve fine features of objects smaller than λ / 2 (λ-wavelength of light), resulting in traditional optical microscopes being in the white light The lower resolution limit is about 200nm (the limit resolution is mainly caused by the exponential attenuation of the high-frequency evanescent waves carried by the fine features of the object as the distance from the object surface increases). [0003] In order to break through the diffraction limit, scientists have developed different super-resolution imaging technologies for more than a century, including super-res...

Claims

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Application Information

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IPC IPC(8): B01J13/02B01L3/00G01N21/17
CPCB01J13/02B01L3/5027G01N21/17G01N2021/178
Inventor 朱海娥赵坤婷刘奇峰唐世林闫凯
Owner CHONGQING UNIV OF TECH
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