阅读说明：本技术 一种二氧化钛纳米颗粒辅助红外纳秒激光在玻璃表面制备微结构的方法 (Method for preparing microstructure on glass surface by titanium dioxide nanoparticle assisted infrared nanosecond laser ) 是由 蔡玉奎 刘战强 罗煕淳 唐一平 万熠 宋清华 王兵 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种二氧化钛纳米颗粒辅助红外纳秒激光在玻璃表面制备微结构的方法,包括以下步骤：(1)将二氧化钛纳米颗粒水凝胶滴至玻璃样件表面；(2)将另一片玻璃压在水凝胶表面,使得水凝胶均匀分布在两片玻璃之间,然后水平静置一段时间,使得二氧化钛纳米颗粒水凝胶晾干；(3)将玻璃片分开得到具有均匀二氧化钛纳米颗粒涂层的玻璃；(4)利用波长1064nm的红外纳秒激光器进行微结构加工；(5)后处理,将步骤3所得样件分别用丙酮、无水乙醇、去离子水超声清洗10分钟,以去除表面粘附的二氧化钛纳米颗粒,得到具有微结构的玻璃样件；解决了石英玻璃对于1064nm的红外纳秒激光吸收率很低,无法实现材料去除的问题。(The invention relates to a method for preparing a microstructure on the surface of glass by titanium dioxide nano-particles assisted by infrared nanosecond laser, which comprises the following steps: (1) dripping the titanium dioxide nano-particle hydrogel on the surface of a glass sample piece; (2) pressing the other piece of glass on the surface of the hydrogel to enable the hydrogel to be uniformly distributed between the two pieces of glass, and horizontally standing for a period of time to enable the titanium dioxide nanoparticle hydrogel to be dried; (3) separating the glass sheet to obtain glass with a uniform titanium dioxide nanoparticle coating; (4) processing a microstructure by using an infrared nanosecond laser with the wavelength of 1064 nm; (5) performing post-treatment, namely ultrasonically cleaning the sample piece obtained in the step 3 by using acetone, absolute ethyl alcohol and deionized water for 10 minutes respectively to remove titanium dioxide nano particles adhered to the surface, so as to obtain a glass sample piece with a microstructure; the problem that the absorption rate of quartz glass to 1064nm infrared nanosecond laser is very low, and material removal cannot be realized is solved.)

1. A method for preparing a microstructure on a glass surface by titanium dioxide nanoparticles assisted by infrared nanosecond laser is characterized by comprising the following steps:

dripping the titanium dioxide nano-particle hydrogel on the surface of a glass sample piece;

then pressing the other piece of glass on the surface of the titanium dioxide nanoparticle hydrogel to ensure that the titanium dioxide nanoparticle hydrogel is uniformly distributed between the two pieces of glass and horizontally stands until the titanium dioxide nanoparticle hydrogel is solidified;

separating the two pieces of glass to obtain glass with a uniform titanium dioxide nanoparticle coating;

processing a microstructure by adopting laser;

and (5) post-treating to obtain the glass sample with the microstructure.

2. The method for preparing the microstructure on the surface of the glass by the titanium dioxide nanoparticles assisted by infrared nanosecond laser according to claim 1, wherein the glass is quartz glass.

3. The method for preparing the microstructure on the surface of the glass by the titanium dioxide nanoparticles assisted by the infrared nanosecond laser as claimed in claim 1, wherein the laser is the infrared nanosecond laser.

4. The method for preparing the microstructure on the glass surface by the titanium dioxide nanoparticle assisted infrared nanosecond laser as claimed in claim 3, wherein the wavelength of the infrared nanosecond laser is 1064nm, the laser processing parameters are that the average laser power is 2W-10W, the pulse frequency is 20 kHz-200 kHz, and the scanning speed is 1000 mm/min-2000 mm/min.

5. The method for preparing the microstructure on the glass surface by the titanium dioxide nanoparticle assisted infrared nanosecond laser as claimed in claim 1, wherein the volume of the titanium dioxide nanoparticle hydrogel per unit area is 0.1-0.2 μ L/mm²。

6. The method for preparing the microstructure on the glass surface by the titanium dioxide nanoparticle assisted infrared nanosecond laser as claimed in claim 1, wherein the concentration of the titanium dioxide nanoparticle hydrogel is 35-40%.

7. The method for preparing the microstructure on the glass surface by the titanium dioxide nanoparticle assisted infrared nanosecond laser as claimed in claim 1, wherein the horizontal standing time is 5-10 minutes.

8. The method for preparing the microstructure on the surface of the glass by the titanium dioxide nanoparticles assisted by infrared nanosecond laser according to claim 1, wherein the post-treatment comprises the following specific steps: and respectively carrying out ultrasonic cleaning on the glass sample by using acetone, absolute ethyl alcohol and deionized water to remove titanium dioxide nano particles adhered to the surface.

9. A glass-like article having a microstructure made by the method of any one of claims 1-8.

10. Use of a microstructured glass-like part according to claim 9 in the biomedical or aerospace field.

Technical Field

The invention belongs to the technical field of laser processing, and discloses a method for preparing a microstructure on a glass surface by using infrared nanosecond laser.

Background

The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.

The quartz glass has excellent physical and chemical properties and can be widely applied to the fields of biological medicine, aerospace and the like, for example, a microfluidic chip prepared from the quartz glass has the advantages of good transmittance, good chemical stability and good biological compatibility. However, due to the characteristics of high hardness, brittleness and low fracture toughness of glass, the manufacture of surface micropores and micro channels of the glass has a difficult problem, and the traditional abrasive jet processing is suitable for glass cutting and is difficult to be applied to the manufacture of glass surface microstructures. The chemical etching processing of the glass microstructure has the defects of chemical pollution and low processing efficiency. The laser processing is used as a non-contact processing method and has the advantages of simple process, small pollution, no need of mask for pattern direct writing and the like. At present, 10.6 mu m of CO is commonly used for glass processing₂Lasers are used for glass cutting or excimer lasers are used for drilling and microstructure machining. However, the average power of the excimer laser is low, which results in low processing efficiency and high cost. The infrared nanosecond laser is one of the most widely applied laser types at present, and quartz glass is a good infrared transmitting material, so that the absorption rate of the infrared nanosecond laser with the wavelength of 1064nm is very low, and the material cannot be removed.

Disclosure of Invention

Aiming at the characteristic that quartz glass cannot absorb infrared nanosecond laser, the invention increases the infrared nanosecond laser absorption rate at the interface of the glass and the titanium dioxide nanoparticle coating by coating the titanium dioxide nanoparticle coating, thereby realizing the manufacture of the microstructure. The invention solves the problems that the absorption rate of quartz glass to infrared nanosecond laser with the wavelength of 1064nm is low and the quartz glass cannot be processed.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a method for preparing a microstructure on a glass surface by titanium dioxide nanoparticles assisted by infrared nanosecond laser comprises the following steps:

dripping the titanium dioxide nano-particle hydrogel on the surface of a glass sample piece;

then pressing the other piece of glass on the surface of the titanium dioxide nanoparticle hydrogel to ensure that the titanium dioxide nanoparticle hydrogel is uniformly distributed between the two pieces of glass and horizontally stands until the titanium dioxide nanoparticle hydrogel is solidified;

separating the two pieces of glass to obtain glass with a uniform titanium dioxide nanoparticle coating;

processing a microstructure by adopting laser;

and (5) post-treating to obtain the glass sample with the microstructure.

The research of the application finds that: the hydrogel has certain viscosity, can not be completely spread on the surface of the glass when being dripped on the surface of the glass, can realize uniform coating by utilizing the pressure of the other piece of glass, and can coat two pieces of glass at one time. However, other coating methods are difficult to ensure the uniformity of the whole glass surface through experiments.

In some embodiments, the glass is quartz glass, and efficient and low-cost fabrication of the microstructures is achieved by increasing the infrared nanosecond laser absorption rate at the interface of the titanium dioxide nanoparticle coating and the glass substrate.

In some embodiments, the laser is an infrared nanosecond laser. Currently, short wavelength lasers (e.g., 532nm) do not require coatings to process glass directly, but lasers are relatively expensive. Infrared lasers are the most common and popular lasers, and therefore, it is an object of the present invention to enable glass microstructure fabrication using infrared nanosecond lasers.

In some embodiments, the wavelength of the infrared nanosecond laser is 1064nm, the laser processing parameters are that the average power of the laser is 2W-10W, the pulse frequency is 20-200 kHz, and the scanning speed is 1000-2000 mm/min, so that the processing efficiency and the processing precision are improved.

The thickness can affect the absorptivity of laser, and if the titanium dioxide coating is too thick, most of laser energy is absorbed by the coating and a microstructure cannot be formed on the glass surface, so that in some embodiments, the concentration of the titanium dioxide nanoparticle hydrogel is 35-40%, and the volume of the titanium dioxide nanoparticle hydrogel per unit area of the glass surface is 0.1-0.2 muL/mm²。

Among them, the 35% titanium dioxide nanoparticle hydrogel used for the 40mm × 20mm glass sheet is 30 microliters, and the effect is better.

In some embodiments, the horizontal standing time is 5-10 min to fully cure the titanium dioxide nanoparticle hydrogel.

In some embodiments, the post-processing comprises the following specific steps: and respectively carrying out ultrasonic cleaning on the glass sample by using acetone, absolute ethyl alcohol and deionized water to remove titanium dioxide nano particles adhered to the surface.

The invention also provides a glass sample with a microstructure prepared by any one of the methods.

The invention has the beneficial effects that:

(1) the titanium dioxide nano-particles are non-toxic, have strong adhesion, and have good opacity, whiteness and brightness.

(2) The infrared nanosecond laser absorption rate at the interface of the titanium dioxide nanoparticle coating and the glass substrate is increased, and the efficient and low-cost manufacture of the microstructure is realized.

(3) The operation method is simple, low in cost, universal and easy for large-scale production.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic diagram of a method for preparing a microstructure on a glass surface by titanium dioxide nanoparticles assisted by infrared nanosecond laser in example 1 of the invention;

FIG. 2 shows a glass microstructure processed by the method of example 1;

FIG. 3 is a view showing a glass micro flow channel processed by the preparation method of example 1 of the present invention;

FIG. 4 is a partial topography of a glass micro flow channel processed by the preparation method of the embodiment 1 of the invention;

the device comprises a quartz glass sample 1 and 40mm multiplied by 20mm, a titanium dioxide nanoparticle hydrogel with the mass fraction of 35%, a liquid transfer device 3, an infrared nanosecond laser pulse 4 and 40mm multiplied by 20mm quartz glass sample 2 and 5, and a focusing mirror used by a laser 6.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As introduced by the background technology, the problems that an excimer laser which is commonly adopted in the prior glass processing has low processing efficiency and high cost, and quartz glass has low absorptivity to infrared nanosecond laser with wavelength of 1064nm and can not realize material removal are solved. Therefore, the method for preparing the microstructure on the surface of the glass by the titanium dioxide nano-particles assisted by infrared nanosecond laser comprises the following steps:

step (1): dripping the titanium dioxide nano-particle hydrogel on the surface of a glass sample piece;

step (2): pressing the other piece of glass on the surface of the hydrogel to enable the hydrogel to be uniformly distributed between the two pieces of glass, horizontally standing for a period of time to enable the titanium dioxide nanoparticle hydrogel to be dried in the air,

step (3) separating the glass sheets to obtain glass with uniform titanium dioxide nanoparticle coatings;

and (4): and (3) processing the microstructure by using an infrared nanosecond laser with the wavelength of 1064 nm.

And (5): and (3) post-treatment, namely ultrasonically cleaning the sample piece obtained in the step (3) by using acetone, absolute ethyl alcohol and deionized water for 10 minutes respectively to remove titanium dioxide nano particles adhered to the surface, so as to obtain the glass sample piece with the microstructure.

Preferably, the 35% titania nanoparticle hydrogel used in step (1) for a 40mm by 20mm glass sheet is 30. mu.l, and the volume of the titania nanoparticle hydrogel per unit area of the glass surface is 0.1 to 0.2. mu.L/mm²。

Preferably, the standing time in the step (2) is 5 minutes.

The present invention is described in further detail below with reference to specific examples, which are intended to be illustrative of the invention and not limiting.