Layered preparation method for membrane bracket of controllable micro-nanofiber structure
A micro-nano fiber and film technology, applied in fiber processing, textile and papermaking, filament/thread forming, etc., can solve the problems of limited application, unfavorable complex structure, poor controllability, etc., achieve fast preparation speed, overcome fiber orientation single effect
Inactive Publication Date: 2015-09-16
XI AN JIAOTONG UNIV
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Problems solved by technology
The micro-nanofibers prepared by traditional solution or melt electrospinning technology are mostly disordered structures, poor controllability, and it is difficult to ensure the stability of structural properties, which greatly limits its application in specific fields.
In order to improve the controllability of the structure of micro-nanofibers, existing improved methods such as using parallel electrodes and high-speed receiving and turning strands as receiving devices can prepare oriented micro-nanofiber structures. Conducive to the manufacture of complex structures; the latest development of near-field electrospinning technology can achieve controllable deposition of single micro-nano fibers by changing the distance from the nozzle to the receiving device and the moving speed of the receiving device, but in the manufacture of complex structures There are problems such as low efficiency and complicated control
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[0023] The present invention is described in further detail below in conjunction with accompanying drawing:
[0024] refer to figure 1 and figure 2 , the layered preparation method of the micro-nano fiber structure controllable film support of the present invention comprises the following steps:
[0025] 1) Put the raw material into the syringe, wherein the raw material is a polymer solution or a solid polymer, and when the raw material is a solid polymer, the raw material is heated to a molten state and sprayed out from the nozzle of the syringe; when When the raw material is a polymer liquid, the raw material is directly ejected from the nozzle of the syringe;
[0026] 2) Connect the receiving platform to the positive electrode, and ground the nozzle of the syringe to form a high-voltage electric field between the nozzle of the syringe and the receiving platform, and then control the flow rate of the raw material ejected from the nozzle of the syringe. After the raw mater...
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Abstract
The invention discloses a layered preparation method for a membrane bracket of a controllable micro-nanofiber structure. The method includes the following steps that (1) raw materials are put in an injector; (2) a high voltage electric field is formed between a nozzle of the injector and a receiving platform, the flow of the raw materials ejected out of the injector is controlled, the raw materials form a Taylor cone after being ejected out of the nozzle of the injector under the action of the high voltage electric field, and the Taylor cone is divided into a plurality of jet steams; (3) the jet steams formed in the second step are deposited on the receiving platform to form a plurality of nanofibers, and a two-dimensional mobile platform drives the receiving platform to move in an xy plane until the upper layer of the to-be-prepared membrane bracket of the controllable micro-nanofiber structure is prepared; (4) a z-axis motor drives the nozzle of the injector to move upward until the to-be-prepared membrane bracket of the controllable micro-nanofiber structure is obtained. According to the method, the membrane bracket of the controllable micro-nanofiber structure can be prepared.
Description
technical field [0001] The invention belongs to the technical field of electrospinning, and relates to a layered preparation method of a film support with a controllable micro-nano fiber structure. Background technique [0002] Electrospinning is a method of applying a high-voltage electric field to form a Taylor cone at the nozzle end of a polymer solution or melt material. By extending the material to form a high-speed jet, the efficient manufacture of micro-nano fiber structures is achieved. The micro-nanofibers prepared by traditional solution or melt electrospinning technology are mostly disordered structures, poor controllability, and it is difficult to ensure the stability of structural properties, which greatly limits their applications in specific fields. In order to improve the controllability of the structure of micro-nanofibers, existing improved methods such as using parallel electrodes and high-speed receiving and turning strands as receiving devices can prepar...
Claims
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IPC IPC(8): D01D5/00
Inventor 贺健康夏鹏李涤尘刘亚雄靳忠民
Owner XI AN JIAOTONG UNIV