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

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...

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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

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