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A kind of fluorinated amphiphilic nanoparticle and its application

A technology of nanoparticle and fluorination, which is applied in the field of nanoparticle, can solve problems such as difficult industrial production and utilization, and achieve the effect of simple modification method, high repeatability and good repeatability

Active Publication Date: 2020-03-24
NORTHEAST GASOLINEEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, uniformly modified nanoparticles are commonly used, but because the preparation of Pickering emulsion usually requires severe shear or ultrasonic treatment to make the particles adsorb to the interface, it is difficult to put into industrial production and utilization

Method used

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  • A kind of fluorinated amphiphilic nanoparticle and its application
  • A kind of fluorinated amphiphilic nanoparticle and its application
  • A kind of fluorinated amphiphilic nanoparticle and its application

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Embodiment Construction

[0022] Below in conjunction with accompanying drawing, the present invention will be further described:

[0023] This fluorinated amphiphilic nanoparticle is 2 The surface is made of non-uniform grafted PFTS, as follows:

[0024] a) Preparation of paraffin / water emulsion:

[0025] Silica particles were dispersed in distilled water containing DDAB (dioctadecylammonium bromide) at 75 °C. Add paraffin to the above mixed solution, adjust the speed of the emulsifier to 3000 r / min, emulsify for 1 h, and prepare a paraffin / water emulsion by shearing the emulsifier. The prepared emulsion was immediately poured into an ice bath to solidify the paraffin. In the process of paraffin solidification, it is necessary to reduce the temperature (0-50°C is suitable) to speed up the paraffin solidification speed and reduce the influence of paraffin deformation on modification.

[0026] b) Modification process:

[0027] The solidified paraffin pellets were washed 5 times with distilled water...

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Abstract

The present invention relates to a fluorinated amphiphilic nanoparticle and its application, wherein the fluorinated amphiphilic nanoparticle is formed on SiO 2 It is made of non-uniform grafted PFTS on the surface, a) prepare a paraffin / water emulsion, and immediately pour the prepared emulsion into an ice bath to solidify the paraffin; b) modification process: wash the solidified paraffin small with distilled water several times The balls were dried at constant temperature under vacuum for 24 hours; the completely dried paraffin balls were dispersed in the absolute ethanol solution of PFTS and stirred at room temperature for 48 hours; the reacted paraffin balls were filtered and washed with absolute ethanol; The washed paraffin pellets are dissolved in acetone solution to release modified silicon dioxide particles, the solution is centrifuged to collect the modified silicon dioxide particles, and vacuum-dried to obtain fluorinated amphiphilic nanoparticles. The present invention can still effectively emulsify under severe conditions such as high temperature and high salt.

Description

technical field [0001] The invention relates to nanoparticles, in particular to a fluorinated amphiphilic nanoparticle and its application. Background technique [0002] Pickering emulsions are completely composed of colloidal particles coalescing at the interface to form a tightly packed structure, creating a space barrier that can effectively prevent the dispersed phase from coalescing, flocculating or merging. Moreover, the Pickering emulsion has higher stability due to the irreversible adsorption on the interface due to the high desorption energy of the nanoparticles. At present, uniformly modified nanoparticles are commonly used, but since the preparation of Pickering emulsion usually requires severe shearing or ultrasonic treatment to make the particles adsorb to the interface, it is difficult to put it into industrial production and utilization. If it is possible to develop a nanoparticle with an amphiphilic structure that can freely diffuse to the interface without ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B33/12B01F3/08
CPCC01B33/12C01P2002/82C01P2002/80B01F23/4146B01F23/41
Inventor 王克亮王刚逯春晶李根陈宇豪张博文
Owner NORTHEAST GASOLINEEUM UNIV
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