Diacetate electrostatic spinning solution based spinning method

A technology of electrospinning and diacetate, applied in the field of preparation of diacetate, can solve problems such as non-electrospinning, achieve the effects of small diameter, increase specific surface area, and save production cost

Inactive Publication Date: 2011-01-19
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, although there have been domestic literature reports on the experimental research of film formation after diacetate is dissolved in a certain solvent system, none of the methods used are electrospinning methods.

Method used

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  • Diacetate electrostatic spinning solution based spinning method
  • Diacetate electrostatic spinning solution based spinning method
  • Diacetate electrostatic spinning solution based spinning method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Spinning processing parameters: the applied voltage is 10-25kV, the receiving distance is 10-30cm, the solution flow rate is 3ml / h, and the variation range of CA concentration is 4-12wt%. Select the optimal combination: the applied voltage is 18kV, the receiving distance is 20cm, and the solution concentration is 8%. The volume ratio of the mixed solvent was set at 2:1, wherein the amount of acetone was 40 mL, and the amount of DMAC was 20 mL. The prepared nanofibrous membrane is similar to a non-woven mat. Through electron microscope analysis, the external morphology and structure of the fiber obtained are as follows: image 3 shown. The invention and figure 1 There are clear differences in the fiber morphology shown. After testing, the fineness of the spun diacetate nanofiber is 0.20-0.5 μm, the unevenness of fineness is 20%, and the longitudinal shape of the fiber is cylindrical.

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PUM

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Abstract

The invention relates to a diacetate electrostatic spinning solution based spinning method. The method comprises the following steps: (1) dissolving diaceate CA in acetone and DMAC to obtain diacetate electrostatic spinning solution with concentration of between 4 and 12 weight percent, wherein the volume ratio of the acetone to the DMAC is 1-3:1; and (2) electrostatically spinning the electrostatic spinning solution at voltage of between 10 and 25KV, receiving distance of between 10 and 30cm and solution flowing speed of 3ml / h. The method is used for preparing nano-fibers at normal temperature without heating or pressurizing, so that the production step is simplified, production cost is saved, no pollution is caused to the environment, and a new state of the diacetate is opened for electrostatic spinning technology with excellent market prospect.

Description

technical field [0001] The invention belongs to the field of preparation of diacetate, in particular to a spinning method based on diacetate electrospinning solution. Background technique [0002] Electrospinning technology has a history of more than 70 years. It was first filed in 1934 when Formhals applied for a patent for an electrospinning device for preparing polymer ultrafine fibers. Since the fiber fineness obtained by electrospinning technology is in the nanometer range, and the collected fiber membrane has a felt-like structure, it has various properties. Because the fiber fineness is extremely small, it has the characteristics of large relative area, and the fiber membrane has a large porosity, so it can be used in filter materials, biomedical engineering materials, composite materials and other fields. With the development in recent years, the application of its membrane has attracted the attention of more and more scientific researchers, and more research has be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/28D01D5/00
Inventor 覃小红王慧曹建华张杰
Owner DONGHUA UNIV
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