Preparation method of starch nanofiber membrane and starch nanofiber membrane

A starch nano-fiber film technology, which is applied in fiber treatment, textiles, papermaking, non-woven fabrics, etc., can solve the problems of poor direct film-forming property, affecting the performance of the film, and the film does not have a nanoscale, so that the preparation process is simple, Good direct film-forming effect

Inactive Publication Date: 2021-06-25
WUHAN POLYTECHNIC UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods of preparing natural thin films require the addition of processing aids, which have poor direct film-forming properties, and the obtained thin films do not have a nanometer scale, which in turn affects the performance of the thin film.

Method used

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  • Preparation method of starch nanofiber membrane and starch nanofiber membrane
  • Preparation method of starch nanofiber membrane and starch nanofiber membrane
  • Preparation method of starch nanofiber membrane and starch nanofiber membrane

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preparation example Construction

[0038] see figure 1 , the preparation method of starch nanofiber film, comprises the following steps:

[0039] S10, dissolving the starch in a solvent, stirring at 60-80° C. for 11-13 hours to obtain a starch liquid;

[0040] For the kind of solvent, the present invention does not limit, and preferably, solvent is the aqueous solution of dimethyl sulfoxide, and dimethyl sulfoxide (DMSO) is a kind of sulfur-containing organic compound, and molecular formula is (CH 3 ) 2 SO, a colorless, odorless, transparent liquid at room temperature, is a hygroscopic flammable liquid. It has the characteristics of high polarity, high boiling point, good thermal stability, aprotic, and water miscibility. It can be dissolved in most organic substances such as ethanol, propanol, benzene and chloroform, and is known as a "universal solvent". Using an aqueous solution of dimethyl sulfoxide can quickly dissolve starch, and in addition, it can also quickly volatilize during electrospinning, so th...

Embodiment 1

[0057] Starch was added to an aqueous solution of dimethyl sulfoxide with a volume concentration of 95%, and magnetically stirred at 70°C for 12 hours to obtain a uniform and transparent starch liquid with a mass fraction of 20%, and the starch liquid was left standing at room temperature for defoaming. Obtain starch spinning solution. Add the starch spinning solution into a 10mL medical syringe, set the ambient temperature to 60°C at a propulsion speed of 1ml / L, the spinning voltage to 20kV, and the distance between the needle and the collection device to be 15cm to perform electrospinning, electrospinning After a period of time, a starch nanofibrous film is obtained on the collecting device.

Embodiment 2

[0059] Starch was added into an aqueous solution of dimethyl sulfoxide with a volume concentration of 95%, and magnetically stirred at 70°C for 12 hours to obtain a uniform and transparent starch liquid with a mass fraction of 22.5%, and the starch liquid was left to defoam at room temperature. Obtain starch spinning solution. Add the starch spinning solution into a 10mL medical syringe, set the ambient temperature to 60°C at a propulsion speed of 1ml / L, the spinning voltage to 20kV, and the distance between the needle and the collection device to be 15cm to perform electrospinning, electrospinning After a period of time, a starch nanofibrous film is obtained on the collecting device.

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Abstract

The invention discloses a preparation method of a starch nanofiber membrane and the starch nanofiber membrane, and relates to the technical field of nanofibers. The preparation method of the starch nanofiber membrane comprises the following steps of S10, dissolving starch in a solvent, and stirring at 60-80 DEG C for 11-13 hours to obtain starch solution; S20, standing and defoaming the starch solution to obtain a starch spinning solution; and S30, carrying out electrostatic spinning on the starch spinning solution at 50-80 DEG C to obtain the starch nanofiber membrane. According to the preparation method of the starch nanofiber membrane, the electrostatic spinning technology is assisted at the temperature of 50-80 DEG C, so that in the electrostatic spinning process, a solvent is volatilized uniformly, nanoscale starch fibers with uniform thickness and smooth surfaces are formed favorably, the preparation process is simple, the direct membrane forming property is good, no processing inhibitor is added, and the starch nanofiber membrane with uniform thickness and smooth surface can be prepared.

Description

technical field [0001] The invention relates to the technical field of nanofibers, in particular to a method for preparing a starch nanofiber film and the starch nanofiber film. Background technique [0002] Over the past few decades, the widespread use of petroleum-based plastic films has had serious negative environmental impacts due to their difficulty in biodegradation. At present, many researchers are committed to seeking environmentally friendly membrane materials to replace traditional petroleum-based plastics, and are expected to be used in many fields such as food, medicine, and chemical industry. [0003] Some natural renewable resources, such as cellulose, starch, chitosan, protein, etc., have been applied in the preparation of membrane materials. Among them, starch is favored by many scholars because of its relatively low price, easy processing, abundant sources, and good biocompatibility. However, the existing methods for preparing natural thin films require t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D01D5/00
CPCD01D5/003D04H1/728
Inventor 蔡杰
Owner WUHAN POLYTECHNIC UNIVERSITY
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