CN103728736A - Anti-fog self-cleaning lens and preparation method thereof - Google Patents

Abstract

The invention discloses an anti-fog self-cleaning lens and a preparation method thereof. Columnar structures are uniformly arranged on the surface of the lens, and each columnar structure is composed of column bodies which are 10-15 microns in diameter and arranged at an interval of 20-30 microns; granular alkyl ketene dimers are uniformly distributed on the surfaces of the columnar structures so as to form a nanostructure. According to the method, columnar structures are formed on the surface of the lens through laser micro processing, and in combination with alkyl ketene dimers, a nanostructure is formed, so that a water droplet forms a contact angle of over 140 DEC on the surface of the lens, and then the water droplet can not be standing on the surface of the lens, thereby preventing the formation of fog on the surface of the lens better. In such a way, the lens provide clearer and more stable vision for people wearing glasses, thereby greatly facilitating the daily life of people wearing glasses. Once the structure is formed, additional measures such as a measure of adding an antifoggant repeatedly are not required to be taken, so that the lens can be durably used.

Description

A kind of antifogging self-cleaning eyeglass and preparation method thereof

Technical field

The present invention relates to eyeglass and manufacture field and Laser Micro-Machining field, refer in particular to a kind of preparation method of antifogging self-cleaning eyeglass.

Background technology

In daily life, fog is ubiquitous, the application of Anti-fog glasses is also more and more extensive, and common people with glasses, doctor, driver, swimmer and deep sea diving operating personnel need to use, so produced the multiple application of fog-proof lens, anti-fogging laryngoscope, Anti-mist mask etc.

The fog-proof lens occurring is the earliest mainly a circle insulating collar is set between two-layer eyeglass and is glued, by this insulating collar, between two-layer eyeglass, formed an insulated chamber, this insulated chamber is pumped into vacuum, to intercept the conduction of most of heat energy, but such fog-proof lens is extremely thick and heavy and not attractive in appearance, is not suitable for ordinary consumer and wears.Then occurred again a kind of fog-proof lens of realizing by plated film, but this eyeglass is easily subject to being infected with of molecule, and the temperature difference is when larger, can not eliminate fast fog.The new fog-proof lens occurring recently is also realized by plated film, its requires in temperature is the vacuum coating cabin of 60 degrees Celsius to 90 degrees Celsius, adopt ion bombardment that the potpourri of zirconia, zinc paste is plated on behind antireflection film layer surface, the potpourri of sodium fluoride, potassium chloride, magnesium fluoride is covered in compound antireflection film layer by vacuum evaporation equably from dosing hole, forms the antifog rete of nanoscale.The anti-fog effect of this fog-proof lens increases, but in its manufacturing process, environment, technology etc. require too highly, be difficult for to form industrialization.

Summary of the invention

The object of this invention is to provide a kind of by the micro-processing of lens surface is there is to the antifogging self-cleaning eyeglass of the imitative lotus leaf micro-nano surface structure of ultra-hydrophobicity with acquisition.

Another object of the present invention is to provide the preparation method of antifogging self-cleaning eyeglass.

Technical scheme of the present invention is: a kind of antifogging self-cleaning eyeglass, and the evenly distributed column structure of lens surface, described column structure is that 10-15 micron, spacing are that the cylinder of 20-30 micron forms by diameter; The alkyl ketene dimer of institute's column structure surface uniform distributed granule shape forms nanostructured.

Further, the particle scale of described granular alkyl ketene dimer is 130 nm, and described height of column is 60-70 micron.

Further, the high Hr=height of column/intercolumniation of the phase coupled columns of described cylinder, 2≤Hr≤3.5, the wide Ar=column diameter/intercolumniation of phase coupled columns of described cylinder, 0.33≤Ar≤0.75, described columnar structured material is coarse than Mr=column diameter/height of column,

0.14≤Mr≤0.25。

Another technical scheme of the present invention is: a kind of preparation method of antifogging self-cleaning eyeglass, comprises the following steps:

1) Ultrasonic Cleaning will be carried out after substrate coating;

2) with laser stepper, lens surface is carried out to Laser Micro-Machining and obtain micron-sized lens surface structure;

3) by purity 98% and above alkyl ketene dimer be heated to 90 ° of C and more than;

4) by step 2) gained eyeglass invades in the liquid of alkyl ketene dimer of step 3) gained after 10-20 minute, cooling fast with nitrogen.

Advantage of the present invention is: this structure makes the globule at lens surface, form the contact angle that is greater than 140 degree, and water droplet cannot be based oneself upon, and has better stoped the formation of fog at lens surface.Thereby for people with glasses provides more clear, stable eyesight, facilitated greatly the person's of getting the right lensses for one's eyeglasses daily life.Once this structure forms, and by without repeatedly adding the additional measures such as antifoggant, can use lastingly.

Accompanying drawing explanation

Below in conjunction with accompanying drawing, the invention will be further described.

Fig. 1 is the micron order column structure figure of minute surface;

Fig. 2 is that the globule is at the schematic diagram of lens surface;

Fig. 3 is eyeglass preparation flow figure;

1 lens surface, 2 column structures, 3 mattress, 4 contact angles.

Embodiment

As shown in Figure 1-2, by Laser Micro-Machining, lens surface 1 is carried out to micro-processing, obtain the minute surface with evenly distributed column structure 2, the diameter 10-15 micron of its cylinder, spacing 20-30 micron, high about 60-70 micron, be mattress 3 between cylinder.Then by microstructure, in conjunction with alkyl ketene dimer (AKD), process and build one deck nanostructured, AKD is graininess and is evenly distributed on through on micro-machined surface, particle scale, in 130 nm left and right, makes eyeglass form the super-hydrophobic minute surface of imitative lotus leaf that contact angle 4 is greater than 140 degree.Column structure 2 has larger phase coupled columns high (Hr=2), can guarantee compound wetting state and less phase coupled columns wide (0.33≤Ar≤0.75), can obtain the contact angle that is no less than 140 degree.And in cylindrical recesses, form one deck mattress 3, further reduce the contact area of the globule and minute surface.The characteristic dimension of column structure can obtain the coarse ratio of large material 0.14≤Mr≤0.25 of trying one's best on the basis that guarantees contact angle, guarantees the mechanical endurance of surface structure.

The preparation method of the eyeglass in the present invention is as shown in Figure 3:

1) first Ultrasonic Cleaning will be carried out after substrate coating.

2) then laser stepper carries out Laser Micro-Machining to lens surface and obtains micron-sized lens surface structure, obtains and has evenly distributed column matrix from the teeth outwards, and these column structure diameters are 10-15 micron, the about 20-30 micron of spacing.

3) finally by microstructure, in conjunction with alkyl ketene dimer (AKD), process and build one deck nanostructured, concrete grammar is as follows: by AKD, (purity is more than 98%, otherwise need purifying) be heated to 90 ° and make above its fusing, again the eyeglass that needs hydrophobization is immersed to about 10-20 minute, cooling fast with nitrogen after taking-up.AKD can be graininess and is evenly distributed on through on micro-machined surface like this, and particle scale, in 130-140 nm left and right, makes lens surface form the super-hydrophobic minute surface of imitative lotus leaf that contact angle is greater than 140 degree.

Claims (5)

1. an antifogging self-cleaning eyeglass, is characterized in that, the evenly distributed column structure of lens surface, and described column structure is that 10-15 micron, spacing are that the cylinder of 20-30 micron forms by diameter; The alkyl ketene dimer of institute's column structure surface uniform distributed granule shape forms nanostructured.

2. a kind of antifogging self-cleaning eyeglass according to claim 1, is characterized in that, the particle scale of described granular alkyl ketene dimer is 130 nm.

3. a kind of antifogging self-cleaning eyeglass according to claim 1, is characterized in that, described height of column is 60-70 micron.

4. a kind of antifogging self-cleaning eyeglass according to claim 1, is characterized in that, high 2≤Hr≤3.5 of phase coupled columns of described cylinder, wide 0.33≤Ar≤0.75 of phase coupled columns of described cylinder, the coarse ratio of described columnar structured material 0.14≤Mr≤0.25.

5. the preparation method of a kind of antifogging self-cleaning eyeglass according to claim 1, is characterized in that comprising the following steps:

1) Ultrasonic Cleaning will be carried out after substrate coating;

2) with laser stepper, lens surface is carried out to Laser Micro-Machining and obtain micron-sized lens surface structure;

3) by purity 98% and above alkyl ketene dimer be heated to 90 ° of C and more than;

4) by step 2) gained eyeglass invades in the liquid of alkyl ketene dimer of step 3) gained after 10-20 minute, cooling fast with nitrogen.

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