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Thermoplastic polyurethane nanofiber film preparation method

A thermoplastic polyurethane and nanofiber technology, applied in textiles, papermaking, non-woven fabrics, etc., can solve the problems of TPU solvent reduction, limited mechanical properties, high concentration of TPU, etc., to achieve effective tensile strength, solubility stability, elongation good length effect

Inactive Publication Date: 2018-09-28
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the TPU-DMF system, the TPU-DMF / THF and TPU-DMF / EA solutions can better prepare nanofibers, and the research and use of the TPU-DMF / THF solution system is more common, but there is a higher concentration of TPU. High, TPU solvent content will decrease with working time and limited mechanical properties

Method used

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  • Thermoplastic polyurethane nanofiber film preparation method
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  • Thermoplastic polyurethane nanofiber film preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0019] (1) Mix trifluoroethanol and chloroform with a volume ratio of 2:8 as a solvent (10mL), add 0.5g thermoplastic polyurethane (TPU) and stir on a magnetic stirrer for 12 hours to dissolve it, and the speed is 200-600rmp; Stir until the thermoplastic polyurethane (TPU) is completely dissolved, so that the solution is clear, transparent, and free of bubbles, and the spinning stock solution is obtained;

[0020] (2) Put the spinning stock solution into the liquid storage container of the electrospinning equipment, adopt the electrospinning technology, collect the fibers ejected and formed from the spinning nozzle in the electrospinning equipment on the aluminum foil plate, and obtain the fiber diameter of The TPU nanofiber film of 400-800nm ​​has a tensile strength of 4.9±1.7MPa and an elongation at break of 437±42%. The specific preparation parameters are as follows: room temperature, humidity at 20-60%, distance between receiver and spinneret at 10-20cm, electrospinning hi...

Embodiment 2

[0022] (1) Mix trifluoroethanol and chloroform with a volume ratio of 4:6 as a solvent (10mL), add 0.5g thermoplastic polyurethane (TPU) and stir on a magnetic stirrer for 12 hours to dissolve it, and the rotation speed is 200-600rmp; Stir until the thermoplastic polyurethane (TPU) is completely dissolved, so that the solution is clear, transparent, and free of bubbles, and the spinning stock solution is obtained;

[0023] (2) Put the spinning stock solution into the liquid storage container of the electrospinning equipment, adopt the electrospinning technology, collect the fibers ejected and formed from the spinning nozzle in the electrospinning equipment on the aluminum foil plate, and obtain the fiber diameter of The TPU nanofiber film of 700-2600nm has a tensile strength of 7.4±1.8MPa and an elongation at break of 412±41%. The specific preparation parameters are as follows: room temperature, humidity at 20-60%, distance between receiver and spinneret at 10-20cm, electrospi...

Embodiment 3

[0025] (1) Mix trifluoroethanol and chloroform with a volume ratio of 5:5 as a solvent (10mL), add 0.5g thermoplastic polyurethane (TPU) and stir it on a magnetic stirrer for 12 hours to dissolve it, and the rotation speed is 200-600rmp; Stir until the thermoplastic polyurethane (TPU) is completely dissolved, so that the solution is clear, transparent, and free of bubbles, and the spinning stock solution is obtained;

[0026] (2) Put the spinning stock solution into the liquid storage container of the electrospinning equipment, adopt the electrospinning technology, collect the fibers ejected and formed from the spinning nozzle in the electrospinning equipment on the aluminum foil plate, and obtain the fiber diameter of The TPU nanofiber film of 500-2300nm has a tensile strength of 8.0±1.8MPa and an elongation at break of 530±38%. The specific preparation parameters are as follows: room temperature, humidity at 20-60%, distance between receiver and spinneret at 10-20cm, electro...

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Abstract

The invention discloses a thermoplastic polyurethane nanofiber film preparation method which comprises the steps: dissolving thermoplastic polyurethane (TPU) into a mixed solvent of trifluoroethanol (TFE) and trichloromethane (TCM), stirring on a magnetic stirrer until the TPU is completely dissolved and making a solution clarified, transparent and free of bubbles to obtain a spinning solution; filling a liquid storage container of electrostatic spinning equipment with the spinning solution, collecting fiber which is sprayed and formed by a spinning nozzle in the electrostatic spinning equipment on an aluminum foil plate by utilizing an electrostatic spinning method to obtain TPU nanofiber films with the fiber diameter as 400 to 2600nm. In the thermoplastic polyurethane nanofiber film preparation method disclosed by the invention, a novel TFE / TCM solution system is utilized, so that the TPU material which has a nanofiber structure, high tensile strength, high toughness and good extended length can be quickly and effectively prepared in large quantity; the diameter of the prepared TPU nanofiber is 400 to 2600nm, the tensile strength is 3 to 10MPa, and elongation at break is 330 to 570%.

Description

technical field [0001] The invention relates to the technical field of nanometer polymer preparation, in particular to a method for preparing a thermoplastic polyurethane nanofiber film. Background technique [0002] Thermoplastic polyurethane (TPU) is a linear block polymer composed of chain extenders, diisocyanates, and polyols. The modulus of TPU is between plastic and rubber, so it has both plasticity and elasticity. It has excellent mechanical properties, cold resistance, wear resistance, oil resistance and ozone resistance. It has been widely used in medical, equipment, light industry and other fields. . In recent years, some research progress has also been made in the preparation of TPU micro / nanofibers by electrospinning technology. For example, in the literature [PolymerEngineering&Science, 2014, 54(6):1412-1417], TPU micro / nano fibers were prepared by laser melting electrospinning technology, the average fiber diameter is 1.70-2.53 μm, and the average elongation ...

Claims

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Application Information

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IPC IPC(8): D04H1/728D04H1/4358
CPCD04H1/728D04H1/4358
Inventor 袁卉华李碧云曹军王兆慧刘寅虎
Owner NANTONG UNIVERSITY