A kind of non-inductive multifunctional electrospinning micro-pyramid array membrane 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: 2022-07-29
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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  • A kind of non-inductive multifunctional electrospinning micro-pyramid array membrane and preparation method thereof
  • A kind of non-inductive multifunctional electrospinning micro-pyramid array membrane and preparation method thereof
  • A kind of non-inductive multifunctional electrospinning micro-pyramid array membrane and preparation method thereof

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preparation example Construction

[0039] A preparation method of a non-inductive multifunctional electrospun micro-pyramid array membrane, comprising the following steps:

[0040] 1) adding the polymer to a high-boiling 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 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 mixture of 1: 1 to 3: 1, the water suitable for dissolving polyvinyl alcohol, the corresponding solvent in formic acid suitable for dissolving polyamide 66; the temperature of the heating and stirring The temperature is 50°C to 55°C; the stan...

Embodiment 1

[0048] 1) Add polyvinylidene fluoride to the mixed solution of dimethyl sulfoxide and acetone with a volume ratio of 2:1, stir at 50°C to fully dissolve the polyvinylidene fluoride, and then stand at 25°C for 15 minutes, Remove the bubbles generated in 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 22-gauge conductive needle, install a grounded conductive receiver 8 cm in front of the needle, and electrically connect a 12.5kV DC high voltage to the conductive needle, at a humidity of 40%. and 25 ℃ environment, the polyvinylidene fluoride solution is formed under the action of a high-voltage electric field to form a fiber whose specific volume surface area sprayed to the conductive receiver periodically changes along the fiber length;

[0050] 3) Use a mechanical pump to control the flow rate of the polyvinylidene fluoride solution in the conduc...

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Abstract

The invention discloses a non-inductive multifunctional electrospinning micro-pyramid array membrane and a preparation method thereof. The preparation method comprises the following steps: firstly disposing a polymer precursor solution; then adding the precursor solution to a conductive needle, and connecting the needle when the needle is connected High-voltage electricity causes the precursor solution to form charged fibers with heterostructures; the above fibers are continuously collected by a grounded conductive receiver; then, the subsequently ejected fibers with heterostructures spontaneously preferentially accumulate in the thicker layers of the collected fibers. position deposition; secondly, volatilize the solvent at room temperature, and finally obtain an ultralight film with electrospun micropyramid arrays. The membrane not only has insensitivity for long-term use, but also has multiple super properties in 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 electrospinning micro-pyramid array membrane and a preparation method thereof. Background technique [0002] The non-inductive, multi-functional, and skin-friendly membrane device can simultaneously achieve long-term health, movement, behavior monitoring, personal protection, biomechanical energy collection and conversion and many other functions for users through a simple integrated structure, which is very important for improving human beings. health level, quality of life and work efficiency play an important role. The advanced performance and multifunctionality of various skin-adhering membrane devices originate from the inherent properties of raw materials and the inherent properties of artificial microstructures and significant enhancement effects. Artificial microstructure arrays composed of geometric shapes with spatially ...

Claims

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Application Information

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Patent Type & Authority Patents(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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