Non-inductive multifunctional electrospinning micro-pyramid array film and preparation method thereof

A pyramid, array membrane technology, applied in electrospinning, textile and papermaking, filament/thread forming, etc., can solve problems such as multidisciplinary performance and versatility of unfavorable related membrane devices, and achieve excellent performance and versatility , ultra-light weight, high efficiency and large-scale effect

Active Publication Date: 2021-11-26
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Despite the above advantages, a common problem with electrospinning technology is the random deposition of electrospun fibers.
The aforementioned drawbacks lead to very limited tunability of the electrospinning process, which is not conducive to maximizing the multidisciplinary performance and versatility of related membrane devices.

Method used

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  • Non-inductive multifunctional electrospinning micro-pyramid array film and preparation method thereof
  • Non-inductive multifunctional electrospinning micro-pyramid array film and preparation method thereof
  • Non-inductive multifunctional electrospinning micro-pyramid array film and preparation method thereof

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preparation example Construction

[0039] A method for preparing a non-inductive multifunctional electrospun micro-pyramid array film, comprising the steps of:

[0040] 1) adding the polymer into a high boiling point solvent, heating and stirring at a temperature lower than the boiling point of the solvent to fully dissolve the polymer, and then standing at 25°C to remove the bubbles generated during the stirring process to obtain a polymer precursor solution;

[0041] The polymer is any one of polyvinylidene fluoride, thermoplastic polyurethane elastomer rubber, polyvinyl alcohol, polyamide 66; the high boiling point solvent is suitable for dissolving polyvinylidene fluoride and thermoplastic polyurethane elastomer rubber The volume ratio of dimethyl sulfoxide and acetone mixed solution of 1:1 to 3:1, the water suitable for dissolving polyvinyl alcohol, and the corresponding solvent suitable for dissolving polyamide 66 in formic acid; the temperature of the heating and stirring 50°C to 55°C; the standing time ...

Embodiment 1

[0048] 1) Add polyvinylidene fluoride into a mixture of dimethyl sulfoxide and acetone with a volume ratio of 2:1, stir at 50°C to fully dissolve the polyvinylidene fluoride, and then let stand at 25°C for 15 minutes. Remove the bubbles generated during the stirring process to obtain a polyvinylidene fluoride solution with a mass concentration of 8.59%;

[0049] 2) Add the polyvinylidene fluoride solution obtained in step 1) into a No. 22 conductive needle, install a grounded conductive receiver at 8 cm in front of the needle, connect the 12.5 kV DC high voltage to the conductive needle, and set the temperature at 40% humidity And under the environment of 25 ℃, the polyvinylidene fluoride solution is formed under the action of a high-voltage electric field to form a fiber whose specific volume surface area is sprayed to the conductive receiver and which changes periodically along the length of the fiber;

[0050] 3) Use a mechanical pump to control the flow rate of the polyvin...

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Abstract

The invention discloses a non-inductive multifunctional electrospinning micro-pyramid array film and a preparation method thereof. The preparation method comprises the following steps of firstly, preparing a polymer precursor solution; adding the precursor solution into a conductive needle head, and connecting high voltage to the needle head, so that the precursor solution forms charged fibers with a heterostructure; continuously collecting the fibers by adopting a grounded conductive receiver; next, depositing the subsequently sprayed fibers with the heterostructure spontaneously and preferentially at the position where the collected fibers are thicker; and then, volatizing a solvent under the normal temperature condition, and finally obtaining the ultra-light film with the electrospinning micro-pyramid array. The film not only has non-inductivity for long-term use, but also has multiple super properties in the aspects of pressure sensing, radiation refrigeration, piezoelectricity, triboelectricity, hydrophilicity and hydrophobicity and the like.

Description

technical field [0001] The invention relates to the technical field of micro-nano manufacturing, in particular to a non-inductive multifunctional electrospun micro-pyramid array film and a preparation method thereof. Background technique [0002] Non-inductive, multi-functional, and skin-adhesive membrane devices can simultaneously realize long-term health, movement, and behavior monitoring of users, personal protection, biomechanical energy collection and conversion, and many other functions through a simple integrated structure. Health level, quality of life and work efficiency play an important role. The advanced performance and multifunctionality of various skin-fitting membrane devices come from the inherent properties of raw materials and the inherent characteristics of artificial microstructures and significant enhancement effects. Artificial microstructure arrays composed of geometric shapes with spatially uneven distribution characteristics, such as micro-cone arra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/728D04H1/76D01D5/00
CPCD04H1/728D04H1/76D01D5/003
Inventor 张嘉汉潘力佳施毅陈璐瑶高兴迅程燕涂增源张树铭
Owner NANJING UNIV
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