Preparing low density porous tin dioxide nano fiber laser target material by electro-static spinning method

An electrospinning method and nanofiber technology, which is applied in the field of laser target material preparation, can solve the problems of complex operation process, expensive experimental equipment, difficult post-processing, etc., and achieve simple equipment, high fiber fineness and uniformity, and long The effect of large diameter ratio

Inactive Publication Date: 2006-11-08
SOUTHEAST UNIV
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Problems solved by technology

The above-mentioned methods have been very mature as a process for preparing low-density materials, but they all have the dis

Method used

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  • Preparing low density porous tin dioxide nano fiber laser target material by electro-static spinning method
  • Preparing low density porous tin dioxide nano fiber laser target material by electro-static spinning method
  • Preparing low density porous tin dioxide nano fiber laser target material by electro-static spinning method

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preparation example Construction

[0025] low density porous SnO 2 Preparation of nanofibrous materials:

[0026] method one:

[0027] Prepare a 20%-40% (mass ratio) polyvinylpyrrolidone (PVP, Mw=44,000) solution, use absolute ethanol as a solvent, and stir at room temperature for 3 hours until completely dissolved. Weigh tin tetrachloride, add absolute ethanol slowly under stirring according to the proportion of 13-15% (mass ratio), and stir at room temperature for 30 minutes until tin tetrachloride is completely dissolved in ethanol. Then the above two solutions were mixed and vigorously stirred at room temperature for 90 minutes until the solutions were completely mixed to be used as a spinning solution. Fill the above spinneret solution into a 5ml glass syringe with a stainless steel needle. The stainless steel needle can be selected from 5#, 6# and 8#. min driver, the electric field strength is 0.1kv / cm~1kv / cm, and the distance from the receiving screen to the spinneret is 5~30cm. Fibers with different...

Embodiment 1

[0032] Weigh 0.247g SnCl 4 .5H 2 O was dissolved in 2ml of ethanol, stirred for 30min, then slowly added dropwise to 10ml of 20% PVP ethanol solution (dropped at regular intervals), stirred for 90min. The above mixed solution was used as a spinning solution. Use a 5ml glass syringe with a 5# stainless steel needle to inhale 4mL of the above spinning solution, the motor advance speed is 1ml / h, the ambient temperature is 25°C, the humidity is 50%, the voltage is 15kv, the needle tip is 15cm away from the aluminum foil collection device, and the fibers are collected. The obtained fibers were calcined in a muffle furnace at 500 °C for 2 h at a constant temperature to obtain SnO 2 Nanofibers.

Embodiment 2

[0034] Weigh 0.52g SnCl 4 .5H 2O was dissolved in 4ml of ethanol, stirred for 30min, then slowly added dropwise to 8ml of 20% PVP ethanol solution (dropped at regular intervals), stirred for 90min. The above mixed solution was used as a spinning solution. Use a 5ml glass syringe with a 5# stainless steel needle to inhale 4mL of the above spinning solution, the motor advance speed is 1ml / h, the ambient temperature is 25°C, the humidity is 50%, the voltage is 15kv, the needle tip is 15cm away from the aluminum foil collection device, and the fibers are collected. The obtained fibers were calcined in a muffle furnace at 500 °C for 2 h at a constant temperature to obtain SnO 2 Nanofibers.

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Abstract

The electrostatic spinning process for preparing low density porous nanometer SnO2 fiber as laser target material is fast, efficient and simple. The electrostatic spinning process includes compound spinning solution with polyvinyl pyrrolidone, absolute ethyl alcohol, tin tetrachloride in certain weight proportion through mixing at room temperature; electrostatic spinning through spraying the spinning solution with spinning jet to an accepting screen 5-30 cm apart from the jet while applying electric field of 0.1-1 kv/cm, controlling the spraying time and the motion of the accepting screen to obtain fiber of different density and deposited in different areas; and roasting at 450-550 deg.c to obtain the nanometer SnO2 fiber.

Description

technical field [0001] The invention relates to the raw material formulation of low-density nano material and the preparation of laser target material. The invention belongs to the technical field of tin dioxide nanofiber laser target material preparation. Background technique [0002] To prepare porous materials with low density and different pore sizes, the conventional preparation methods are as follows: 1. Sol-gel method, the sol is formed into a gel by chemical reaction or physical means, and then the solvent is removed by supercritical extraction or freeze-drying Obtain porous material; 2. High internal phase emulsion method (HIPE), first prepare water-in-oil type high internal phase emulsion by emulsification, then polymerize the oil phase, and finally remove solvent by replacement and drying to obtain porous material; 3. Polymer And the solvothermal-induced phase separation method, firstly use phase separation to prepare polymer gel or crystal, and then remove the s...

Claims

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Application Information

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IPC IPC(8): D01D5/00D01F9/08
Inventor 顾忠泽潘超
Owner SOUTHEAST UNIV
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