Infrared-radiation-assisted high-voltage static spray device with coaxial spinning nozzle and application thereof

A technology of high-voltage electrostatic spraying and coaxial spinning, which is applied in the fields of filament/thread forming, textile and papermaking, fiber treatment, etc. It can solve the problems such as the complexity of high-voltage electrostatic spraying devices and the increasing difficulty of spraying process adjustment and control, and achieve The effect of simple preparation process

Inactive Publication Date: 2011-11-02
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of these reverse hot airflows or coagulation baths not only complicates the high-voltage el

Method used

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  • Infrared-radiation-assisted high-voltage static spray device with coaxial spinning nozzle and application thereof
  • Infrared-radiation-assisted high-voltage static spray device with coaxial spinning nozzle and application thereof
  • Infrared-radiation-assisted high-voltage static spray device with coaxial spinning nozzle and application thereof

Examples

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Embodiment 1

[0041] A method for preparing polyvinylpyrrolidone (PVP)-wrapped polyacrylonitrile (PAN) core-shell structure micro-nanospheres, comprising the following steps:

[0042] (1) Disperse 3.0 g of PAN powder in 100 ml of DMAc at 4°C, then shake overnight in a water-bath shaker at 60°C to form a light yellow uniform transparent solution as the inner core solution;

[0043] Dissolve 20.0 g of PVP K17 powder in 100 ml of ethanol at room temperature as the outer sheath solution;

[0044] (2) Add the inner core solution and outer sheath solution obtained in step (1) into the core liquid syringe and the sheath liquid syringe respectively, and carry out high-voltage electrostatic spraying by infrared radiation-assisted high-voltage electrostatic spraying device;

[0045] The high-voltage electrostatic spraying process controls the flow rate of the outer sheath solution in the sheath fluid syringe to 1-3ml / h, and the flow rate of the inner core solution in the core fluid syringe to 0.2-0.6...

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Abstract

The invention discloses an infrared-radiation-assisted high-voltage static spray device with a coaxial spinning nozzle, and a method for preparing polymer micro-nanometre particles with nuclear-shell structures by using the same. The device comprises an injector 1, an axial flow injection pump 1, an injector 2, an axial flow injection pump 2, a high-voltage power supply, a powder receiving plate and an infrared radiation source, wherein the coaxial spinning nozzle is formed on the injector 1 as well as the front end of an injection needle head of the injector 2 by a high-elasticity soft silicone hose; the high-voltage power supply is connected to the back end of the injection needle head of the injector 2 by a crocodile squeezer; the high-voltage power supply and the powder receiving plate are grounded together; and the infrared radiation source is arranged between a nozzle orifice of the coaxial spinning nozzle and the powder receiving plate. The method for preparing the polymer micro-nanometre particles with the nuclear-shell structures comprises two steps of solution preparing and spraying, and auxiliary drying through irradiation of the infrared radiation source. The preparation method disclosed by the invention is simple, and is suitable for the industrial production; and the obtained polymer nanometre particles with the nuclear-shell structures are fully dried, are small in diameter, and are controllable.

Description

technical field [0001] The invention belongs to the field of preparation of polymer micro-nano particles, in particular to an infrared radiation assisted high-voltage electrostatic spray device with a coaxial spinning nozzle and its application in preparing polymer micro-nano particles with a core-shell structure. Background technique [0002] High-voltage electrostatic spray technology is a top-down micro-nano manufacturing technology. The jet is formed by overcoming the liquid surface tension and viscoelastic force of the droplets at the tip of the nozzle by an external electric field force. Under the joint action of tension, the atomized liquid jet is split by high frequency, and micro-nano particles are obtained at the receiving end through solvent volatilization or melt cooling. This technology has simple process, convenient operation, wide range of material selection, strong controllability, and micro-nano particles with microstructure characteristics can be prepared t...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01D5/34C08J3/12C08L33/20C08L77/00C08L39/06C08L33/02
Inventor 余灯广王霞李颖钱微李晓燕
Owner UNIV OF SHANGHAI FOR SCI & TECH
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