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A Fabrication Method of Flexible and Stretchable Devices Based on Ordered Arrangement and Twisted Structures
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A technology of orderly arrangement and twisted structure, which is applied in the bundling of newly ejected filaments, textiles and papermaking, and fiber processing. , the effect of convenient operation
Inactive Publication Date: 2017-03-08
QINGDAO UNIV
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[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. Aiming at the shortcomings of the current electrospinning technology, the flexible stretchable device can only be unidirectionally stretched along the fiber axis, and it is difficult to achieve accurate pre-strain control. Provide a preparation method for flexible and stretchable devices based on ordered arrangement of twisted structures, using a novel electrospinning technology to induce a two-dimensional network fiber structure on a pre-stretched flexible substrate, thereby preparing flexible and stretchable devices, respectively or Simultaneously realize the two-dimensional direction stress stretching of the flexible stretchable device, and can realize the pre-strain control of the material more accurately in both directions, the prepared stretchable device is based on the pre-stretched flexible substrate Two-dimensional network structure formed after orderly arrangement and twisted structure fiber cross structure prepared by electrospinning
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Embodiment 1
[0017] Example 1: Preparation of flexible and stretchable transparent electrodes
[0018] In this example, the ring-shaped aluminum foil collector is used as the collecting substrate, including the preparation of the electrospinning precursor solution, the preparation of the flexible and stretchable transparent electrode, and the performance test. The specific preparation process is as follows:
[0019] (1), preparation of electrospinning precursor solution: the selected spinning solution is a polyurethane (PU) solution doped with single-walled carbon nanotubes, first dimethylformamide (DMF) and tetrahydrofuran (THF) according to Volume ratio 1: 1 is mixed as solvent, then adding mass fraction in solvent is polyurethane (PU) of 10% to obtain polyurethane (PU) solution, in polyurethane (PU) solution, add the single-walled carbon nanotube aqueous solution prepared in advance ( Containing sodium dodecylbenzene sulfonate as surfactant), after magnetic stirring at room temperature ...
Embodiment 2
[0022] Example 2: Preparation of flexible and stretchable piezoelectric sensors
[0023] In this example, the ring-shaped aluminum foil collector is used as the collecting substrate, including the preparation of the electrospinning precursor solution, the preparation of the flexible and stretchable electric sensor and the performance test. The specific preparation process is as follows:
[0024] (1), Preparation of electrospinning precursor solution: select polyvinylidene fluoride (PVDF) precursor spinning solution, first dissolve 2 grams of PVDF in N,N dimethylformamide ( DMF, 4 grams) and acetone (4 grams) solvent, then magnetically stirred for 4 hours at 40 ° C, the solution was fully mixed, and then left to stand for 30 minutes to obtain a uniform electrospinning precursor solution;
[0025] (2) Preparation of flexible and stretchable electrical sensors: first cut out a flat PDMS film with a size of 2.5cm×2.5cm, and then apply tensile stress in the direction perpendicular ...
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Abstract
The invention belongs to the technical field of flexible device manufacturing, and relates to a method for manufacturing a flexible stretchable device based on an ordered arrangement torsion structure. The method includes the steps that firstly, a flexible macromolecule substrate is pre-stretched to be fixed to a glass sheet, and electrodes are manufactured at the four edges of the pre-stretched flexible macromolecule substrate; secondly, the flexible macromolecule substrate is placed on an annular metal collector connected with the negative electrode of a power source to serve as a collecting substrate, and a machined hollow stainless steel needle serves as a spinning spraying head; a spinning solution is injected into a spinning solution container for electrospinning; the flexible macromolecule substrate is horizontally rotated by 90 degrees for continuous electrospinning and then taken down from the glass sheet, and the flexible stretchable device based on an ordered arrangement torsion structure is obtained. The method is simple in manufacturing process and convenient to operate; the manufactured flexible stretchable device can be stressed and tensioned in one or two of the two-dimensional directions respectively, pre-strain control over materials in the two directions can be accurately achieved, and the application range is wide.
Description
technical field [0001] The invention belongs to the technical field of flexible device preparation, and relates to a method for preparing a flexible stretchable device based on an ordered arrangement and twisted structure, in particular to a method for inducing a two-dimensional network on a pre-stretched flexible substrate using a novel electrospinning technology. A method for fabricating flexible and stretchable devices through fiber-like structures. Background technique [0002] Electrospinning technology is considered to be a simple and effective method for large-scale preparation of uniform and continuous one-dimensional nanostructured materials. In recent years, the fine regulation of electrospun fiber morphology has developed rapidly, such as coaxial electrospinning (NanoLett. 2004, 4, 933), multi-fluid composite electrospinning (J.Am.Chem.Soc. 2007,129,764), near-field electrospinning (Adv.Mater.2011,23,5651), magnetoelectrospinning (Adv.Mater.2007,19,3702), centrif...
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