Process for preparing chitosan nano fiber film with stable state

A technology of chitosan nanometer and nanofiber, which is applied in the direction of fiber treatment, fiber chemical characteristics, and conjugated synthetic polymer artificial filament, can solve the problems of inability to maintain the structure and shape of nanofiber composite membrane, and achieve stable shape structure, The effect of high porosity and high specific surface area

Inactive Publication Date: 2007-02-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the currently prepared chitosan/polyvinyl alcohol nanofiber composite membrane cannot maintain the original structure of the nan

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0014] Example 1

[0015] Dissolve 5% by weight chitosan (viscosity average molecular weight of 100,000) in 90% acetic acid aqueous solution, stir mechanically at room temperature, and form a homogeneous, transparent, viscous solution after complete dissolution; change the weight percentage 9% polyvinyl alcohol (polymerization degree is 1700, alcoholysis degree is 88%) dissolved in water to form a homogeneous, transparent and viscous solution; the chitosan and polyvinyl alcohol solution is in a volume ratio of 1:1 Mix uniformly to obtain the spinning solution, add it to the sampler, connect it to the spinneret, connect the spinneret to the high-voltage power supply, the distance between the spinneret and the receiver is about 10 cm, the spinneret spinning solution The flow rate is 0.3 ml / hour, the voltage is 20 kV, and electrospinning is performed to obtain a chitosan / polyvinyl alcohol nanofiber composite membrane with a diameter of 50-200 nanometers. Then the obtained nanofiber c...

Example Embodiment

[0016] Example 2

[0017] Dissolve 4% by weight chitosan (viscosity average molecular weight of 200,000) in 90% acetic acid aqueous solution, stir mechanically at room temperature, and form a homogeneous, transparent, viscous solution after complete dissolution; change the weight percentage 9% polyvinyl alcohol (polymerization degree is 2400~2500, alcoholysis degree is 99%) is dissolved in water to form a homogeneous, transparent and viscous solution; the chitosan and polyvinyl alcohol solution are in a volume ratio of 2 :1 Mix evenly to obtain the spinning solution, add it to the sampler, connect to the spinneret, connect the spinneret to the high-voltage power supply, the distance between the spinneret and the receiver is about 10 cm, the spinneret spins The flow rate of the silk liquid is 0.5 ml / hour, the voltage is 20 kV, and the electrospinning is performed to obtain a chitosan / polyvinyl alcohol nanofiber composite membrane with a diameter of 100-300 nanometers. Then immerse ...

Example Embodiment

[0018] Example 3

[0019] Dissolve 3% by weight chitosan (viscosity average molecular weight of 500,000) in 90% acetic acid aqueous solution, stir mechanically at room temperature, and form a homogeneous, transparent and viscous solution after complete dissolution; change the weight percentage 10% polyvinyl alcohol (polymerization degree is 1700, alcoholysis degree is 88%) is dissolved in water to form a homogeneous, transparent and viscous solution; the chitosan and polyvinyl alcohol solution is in a volume ratio of 3:1 Mix uniformly to obtain the spinning solution, add it to the sampler, connect to the spinneret, connect the spinneret to the high-voltage power supply, the distance between the spinneret and the receiver is about 15 cm, the spinneret spinning solution The flow rate is 1.0 ml / hour, the voltage is 20 kV, and electrospinning is performed to obtain a chitosan / polyvinyl alcohol nanofiber composite membrane with a diameter of 400-800 nanometers. Then immerse the resulti...

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Abstract

the invention discloses a chitose nanometer fiber film and preparing method with stable shape structure in the carrier domain, which comprises the following steps: forming transparent solution in the water mixed solvent through dissolving chitose and polyvinyl alcohol in the glacial acetic acid; putting the spin liquid in the feeder; connecting spin-spraying head with high-pressure power at 5-30 kV; spinning; immersing the film material in the strong alkaline solution; possessing stable shape structure.

Description

technical field [0001] The invention relates to a preparation technology of a chitosan nanofiber membrane with a stable morphological structure. Background technique [0002] The use of electrospinning to prepare nano-sized fiber composite membrane materials has attracted more and more attention. Electrospinning technology is to spin a polymer solution or melt under an electric field, stretch it due to electrostatic action, and obtain ultra-fine nanofibers after cooling or solvent volatilization. This type of material has the advantages of high specific surface area and high porosity. . The electrospinning method can be used to prepare various polymer nanofiber composite membrane materials. US 20030215624; 20040013873 common polymers such as: polyvinyl alcohol, polyethylene, polypropylene, polystyrene, polysulfone, polycarbonate, polyurethane, polymethacrylate, polyvinyl chloride, polyamide by electrospinning , polyacrylate, polyvinylpyrrolidone, etc. to prepare superfine...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/08D01F8/18D01F8/04D01D5/00
Inventor 徐志康黄小军弋丹
Owner ZHEJIANG UNIV
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