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A preparation method and product based on laser-induced superhydrophilic pet surface

A hydrophilic surface, laser-induced technology, used in vacuum evaporation plating, coating, sputtering, etc., can solve the problem of limited large-area production and time-consuming coating process, poor stability of coating wettability materials, etc. problem, to achieve the effect of low production cost, improved hydrophilicity, and simple steps

Active Publication Date: 2019-08-30
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of coating wettable materials is poor, and the coating process is limited by large-area production and time-consuming
[0003] At present, there is no report on the simple preparation method of modifying PET film to be superhydrophilic. However, the preparation of superhydrophilic patterns on hydrophobic PET substrates has a wide range of applications in the fields of water vapor collection, microfluidics, and pharmaceutical production.

Method used

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  • A preparation method and product based on laser-induced superhydrophilic pet surface
  • A preparation method and product based on laser-induced superhydrophilic pet surface
  • A preparation method and product based on laser-induced superhydrophilic pet surface

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preparation example Construction

[0026] A preparation method based on laser-induced super-hydrophilic PET surface, the method comprises the following steps:

[0027] Step 1, PET is attached to the glass surface

[0028] Prepare the attachment substrate 1 by spin-coating the absolute ethanol solution 2 on the glass surface, so that the PET film 3 is attached to the substrate surface 1 more smoothly;

[0029] Step 2, colored layer preparation

[0030] Depositing a colored seed layer 4 with a thickness of 0.03-3 μm on the surface of the sample by sputtering;

[0031] Step 3, laser-induced processing

[0032] Use a laser marking machine to scan the surface of the PET film to obtain a rough surface 5, that is, a hydrophilic layer, with a pulse repetition frequency of 10-100 kHz, a pulse width of 0.1-0.2, and a laser spot speed of 50-500 mm / s;

[0033] Step 4, alkaline solution corrosion

[0034] Use the solution method to etch the processed surface, adjust the alkaline solution to pH = 8-14, and the corrosion ...

Embodiment 1

[0037] Spin-coat anhydrous ethanol solution on the surface of the glass substrate, and then attach the PET film on the glass substrate; deposit a colored layer with a thickness of 2 μm on the surface of the PET film by sputtering; scan the colored layer with a laser, pulse repetition frequency 50kHz, pulse width 0.15, laser spot speed 300mm / s; the hydrophilic layer on the surface of the PET film was etched with an alkaline solution with a pH of 10, and the etching time was 10min to obtain a superhydrophilic PET surface.

Embodiment 2

[0039] Spin-coat anhydrous ethanol solution on the surface of the glass substrate, and then attach the PET film on the glass substrate; deposit a colored layer with a thickness of 3 μm on the surface of the PET film by sputtering; scan the colored layer with a laser, pulse repetition frequency 100kHz, pulse width 0.2, laser spot speed 500mm / s; the hydrophilic layer on the surface of the PET film was etched with an alkaline solution with a pH of 14 for 30 minutes to obtain a super-hydrophilic PET surface.

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Abstract

The invention belongs to the technical field of surface modification of solid materials, and discloses a preparation method of a laser induction-based superhydrophilic PET surface and a product. The preparation method comprises the following steps: (a), adhering a PET film to be treated to a substrate, and preparing a metal colored layer on the PET film in a sputtering manner; (b), focusing laseron the colored layer, wherein the colored layer absorbs the energy of the laser and enables the energy to act on the surface of the PET film at a junction with the colored layer so as to form a hydrophilic surface layer on the surface of the PET film; (c), corroding the hydrophilic surface layer with a solution method so as to change the morphology of the hydrophilic surface layer and form a superhydrophilic surface layer, so that preparation of the superhydrophilic layer of the PET film to be treated is completed. A structure prepared with the preparation method provided by the invention hasthe characteristics of superhydrophilicity, high durability and the like, and is simple in technology and low in cost.

Description

technical field [0001] The invention belongs to the technical field of surface modification of solid materials, and more specifically relates to a laser-induced super-hydrophilic PET surface preparation method and products. Background technique [0002] PET is a commonly used flexible substrate and is widely used in industrial production. Generally, the surface wettability of PET at room temperature exhibits certain hydrophobicity. The method of surface modification of PET mainly includes coating wettability material layer. However, the stability of coating wettable materials is poor, and the coating process is limited to large-area production and time-consuming. [0003] At present, there is no report on the simple preparation method of modifying PET film to be superhydrophilic. However, the preparation of superhydrophilic patterns on hydrophobic PET substrates has a wide range of applications in the fields of water vapor collection, microfluidics, and pharmaceutical prod...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/20C23C14/58C08J7/06C08J7/12C08L67/02
Inventor 廖广兰林建斌谭先华史铁林汤自荣
Owner HUAZHONG UNIV OF SCI & TECH
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