Near field direct writing focusing and micro pattern separation method based on PEO electrospinning film substrate

An electrospinning direct writing and micropattern technology, applied in the field of electrospinning direct writing, can solve the problems of difficulty in removing the electrospinning direct writing micropattern from the substrate, jet whipping, etc.

Active Publication Date: 2019-06-25
厦门定慧力教育科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, it is necessary to provide a simple and easy method that does not need to invest in additional equipment, overcome the problem of jet whipping in the process of electrospinning direct writing and the problem that electrospinning direct writing micropatterns are difficult to remove from the substrate, and realize electrospinning. Non-destructive and rapid separation of electrospun direct-writing micropatterns and substrates by self-collimating focus of direct writing

Method used

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  • Near field direct writing focusing and micro pattern separation method based on PEO electrospinning film substrate
  • Near field direct writing focusing and micro pattern separation method based on PEO electrospinning film substrate
  • Near field direct writing focusing and micro pattern separation method based on PEO electrospinning film substrate

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Embodiment 1

[0028] refer to Figure 1-Figure 5 As shown, this embodiment utilizes the high porosity and water-solubility properties of the PEO fiber membrane to realize the focusing of the electrospinning direct-writing jet and the non-destructive detachment of the micropattern of the poorly water-soluble material. The near-field direct writing focusing and micropattern detachment method based on the PEO electrospun membrane substrate includes the following steps:

[0029] 1. Material selection

[0030] In this example, the target material is polyvinylidene fluoride (PVDF), the isolation sacrificial material is polyethylene oxide (PEO), the collecting substrate is tinfoil paper, and the solution used for separation is deionized water H 2 O; choose the mixed liquid of DMF and acetone as the solvent of PVDF, choose alcohol and deionized water as the solvent of PEO. Among them, polyvinylidene fluoride is a polymer material that is difficult to dissolve in water, and it will not deform grea...

Embodiment 2

[0043] The basic process of this embodiment is the same as that of Embodiment 1, the difference is:

[0044] Prepare 100mL of 6wt% PVDF solution, the ratio of NMP to acetone in the solvent is 5:5, the steps are: measure 50mL of NMP, then weigh 5.785g of PVDF powder, add it to the aforementioned liquid, then measure 50mL of acetone, and pour it into the aforementioned liquid Finally, magnetic particles were added to the mixture, and stirred under a magnetic field for 12 hours to fully mix the components.

[0045] Among them, corresponding to different solution concentrations, the ratio of NMP to acetone in the solvent can be arbitrarily selected in the range of 2:8 to 8:2 to change the solvent volatilization rate, thereby controlling the fiber morphology.

Embodiment 3

[0047] The basic process of this embodiment is the same as that of Embodiment 1, the difference is:

[0048] Prepare 100mL of 20wt% PVDF solution, the ratio of NMP to acetone in the solvent is 5:5, the steps are: measure 50mL of NMP, then weigh 22.656g of PVDF powder, add to the aforementioned liquid, then measure 50mL of acetone, pour into the aforementioned liquid Finally, magnetic particles were added to the mixture, and stirred under a magnetic field for 12 hours to fully mix the components.

[0049] Among them, corresponding to different solution concentrations, the ratio of NMP to acetone in the solvent can be arbitrarily selected in the range of 2:8 to 8:2 to change the solvent volatilization rate, thereby controlling the fiber morphology.

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Abstract

The invention relates to the technical field of electrospinning direct writing, in particular to a near field direct writing focusing and micro pattern separating method based on a PEO electrospinningfilm substrate, according the method, the electrospinning substrate combining the PEO electrospinning film and an aluminum foil is used for realizing focusing of electrospinning direct-writing jet flows and non-destructive separation of a micro-pattern of an electrospinning material which is insoluble in water. The method comprises the following steps: firstly, spinning a layer of water-soluble PEO fiber membrane on a grounding metal substrate by an electrostatic spinning technology to prepare a composite electrospinning substrate, then using an electrospinning direct-writing technology to print the micro-pattern on the substrate, and finally, soaking the composite substrate together with the micro-pattern into a selected solution, the PEO can be dissolved, the micro-pattern cannot be dissolved, and at the moment, due to the fact that a material connected with the target fiber membrane and the substrate is dissolved, the micro-pattern is separated from the substrate. According to themethod, the self-focusing of electrospinning direct-writing and non-destructive separation of the electrospinning direct-writing micro-pattern and the metal substrate can be realized.

Description

technical field [0001] The invention relates to the technical field of electrospinning direct writing, in particular to an electrospinning direct writing focusing and micropattern detachment technology using a PEO electrospun film as a substrate. Background technique [0002] Electrospinning (Electrospinning) is a technology that uses the action of an electric field on a viscous solution to make the solution overcome the surface tension to generate a jet, thereby producing micro / nano-scale fibers. The electrospinning direct writing technology (Electrohydrodynamic Direct Writing, EDW) is a new type of continuous jet printing technology based on electrospinning, which suppresses the spiral, bending and unstable motion of the traditional electrospinning jet, and overcomes the traditional electrostatic Disadvantages of disordered deposition of spun nanofibers, direct-write preparation of ordered nanostructures using a steady linear jet. Compared with the expensive and complicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00C08L27/16
Inventor 郑高峰钟炜政姜佳昕刘益芳柳娟郑建毅
Owner 厦门定慧力教育科技有限公司
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