CN110888242A - Application method of melanin and preparation method of melanin lens - Google Patents
Application method of melanin and preparation method of melanin lens Download PDFInfo
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- CN110888242A CN110888242A CN201910998952.XA CN201910998952A CN110888242A CN 110888242 A CN110888242 A CN 110888242A CN 201910998952 A CN201910998952 A CN 201910998952A CN 110888242 A CN110888242 A CN 110888242A
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- melanin
- lens
- plastic resin
- liquid plastic
- pigment
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- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/108—Colouring materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Eyeglasses (AREA)
Abstract
The embodiment of the invention discloses an application method of melanin, which is characterized in that the surface structure of water-soluble melanin which is the same as a light transmission spectrum material of a human crystalline lens is modified, the hydrophilic structure of the surface is modified into a hydrophobic structure, and then the synthetic lens pigment obtained after modification is absorbed and dispersed in liquid plastic resin to be made into an optical device in a lens or an optical filter of ophthalmic equipment, or can be dispersed in ARM to be made into a protective film. The invention takes melanin as a medium of an anti-electromagnetic radiation absorption color developing agent and a radiation absorption pigment, injects the melanin into various filters, protects eyes and skin from being damaged by radiation from an artificial light source and a natural light source, the radiation wavelength absorbed by the melanin can reach as high as 2500 nanometers and can reach as low as about 200 nanometers, the radiation quantity absorbed by the melanin is continuously increased along with the shortening of the radiation wavelength, and a lens containing the melanin is placed in front of the eyes to provide the protection of electromagnetic radiation and harmful light for cornea, crystalline lens and retina.
Description
Technical Field
The embodiment of the invention relates to the technical field of melanin application, and particularly relates to a melanin application method and a melanin lens preparation method.
Background
At present, the common radiation-proof lens can only filter ultraviolet rays and certain electromagnetic radiation, but can not filter blue light. The all-round blue-light-proof lens not only can effectively isolate ultraviolet rays and radiation, but also can filter more than 70% of blue light, is suitable for being used when watching computers or televisions, greatly reduces the stimulation of the blue light to eyes, eliminates uncomfortable symptoms such as acerbity, fever or pain of the eyes and the like, and relieves eye fatigue. Relative to other methods and measures, wearing blue-blocking lenses is the most effective method for protecting eye health.
Because people's eye self can not filter the blue light, will reduce the damage of blue light to eyes, generally need wear professional level and prevent the glasses of blue light lens, ordinary coating film lens can only filter ultraviolet ray, electromagnetic radiation. It is worth mentioning that blue light filtering and myopia glasses are two things, and people who are not near sighted should also pay attention to protect eyes from being damaged by blue light.
When a computer or a mobile phone is used, a pair of blue-light-proof glasses is worn, so that the stimulation of blue light to eyes can be greatly reduced, the uncomfortable symptoms such as the acerbity, the eye swelling and the pain of the eyes can be relieved, and the eye fatigue can be relieved; when the automobile is driven at night, the stimulation of glare to eyes is effectively reduced, the long-range contrast is improved, the driving is safer, and the eyes are more comfortable.
Disclosure of Invention
Therefore, the embodiment of the invention provides an application method of melanin and a preparation method of a melanin lens, and the problem that effective protection cannot be provided in the prior art is solved through the application of the melanin.
In order to achieve the above object, an embodiment of the present invention provides the following:
in a first aspect of the embodiments of the present invention, there is provided a method for applying melanin, which is characterized in that the surface structure of water-soluble melanin which is the same as the light transmission spectrum material of human crystalline lens is modified to make the hydrophilic structure of the surface modified into hydrophobic structure, and then the synthetic lens pigment obtained after modification is absorbed and dispersed in liquid plastic resin or ARM to make the protective film of the lens of ophthalmic device, optical device in optical filter or display screen of multimedia device.
As a preferred embodiment of the present invention, the synthetic lens colorants comprise the polymerization product of 3-hydroxykynurenine.
In a preferred embodiment of the present invention, the synthetic lens pigment is purified and then combined with a liquid plastic resin by a thermosetting casting process or a thermoplastic injection molding process.
In a preferred embodiment of the present invention, the liquid plastic resin includes a polyvinyl alcohol solid plastic film.
In a second aspect of the embodiments of the present invention, there is provided a method for preparing a melanin lens, which includes the following steps:
step 100, obtaining water-soluble melanin;
200, modifying water-soluble melanin to obtain a synthetic lens pigment;
step 300, purifying the synthesized lens pigment;
step 400, absorbing and dispersing the purified synthetic lens pigment in liquid plastic resin or ARM;
step 500, the liquid plastic resin is made into an optical device or ARM is made into a protective film.
As a preferable aspect of the present invention, in step 300, the step of performing the cleaning process on the synthetic lens dye comprises the specific steps of: impurities are precipitated by changing the temperature.
As a preferred embodiment of the present invention, in step 400, the specific method for absorbing and dispersing the synthetic lens dye is:
adding the synthetic lens pigment into the alcohol solution, and continuously stirring until the synthetic lens pigment is completely dissolved in the alcohol solution;
introducing compressed air into the dissolved alcohol solution, increasing the pressure of the mixed solution, and maintaining the pressure for stirring and mixing;
dispersing the mixed alcohol solution with high pressure into liquid plastic resin successively, and distilling at reduced pressure and low temperature while stirring until all alcohol in the solution is evaporated.
In a preferred embodiment of the present invention, in step 500, a synthetic lens pigment is compounded with the liquid plastic resin in a thermosetting casting process or a thermoplastic injection molding process to obtain a lens.
As a preferred embodiment of the present invention, in step 500, the thermosetting casting molding or thermoplastic injection molding specifically comprises the following steps:
selecting a mold, uniformly spraying a release agent on the inner surface of the mold, closing the mold and sealing an outlet to check the air tightness of the mold;
filling protective gas into the mold after the mold is completely airtight, temporarily closing the filling hole, and arranging a vertical liquid storage pipe on the filling hole;
heating a specified amount of liquid plastic resin to a specified stability, filling the liquid plastic resin through a filling hole at one time, and temporarily storing the liquid plastic resin in a liquid storage pipe;
the outlet is opened in sequence to allow the liquid plastic resin to flow into the mold, closed when the outlet has the liquid plastic resin flowing out, and the other outlets are opened in sequence until filling is completed.
As a preferable scheme of the invention, the pressure of the filled protective gas is 0.4-0.8 MPa, and the mould is preheated to the temperature of the heated liquid plastic resin before the protective gas is filled.
The embodiment of the invention has the following advantages:
(1) the invention takes melanin as a medium and a radiation absorbing pigment of an anti-electromagnetic radiation absorbing color developing agent, and injects the melanin into plastic, glass optical lenses and other various filters to protect eyes and skin from being damaged by radiation from an artificial light source and a natural light source, the radiation wavelength absorbed by the melanin can reach as high as 2500 nanometers and can reach as low as about 200 nanometers, the radiation quantity absorbed by the melanin is continuously increased along with the shortening of the radiation wavelength, and the lens containing the melanin is placed in front of the eyes to provide strong radiation and harmful light protection for cornea, crystalline lens and retina, and simultaneously can be injected into ARM to be made into a display screen protective film of a mobile phone, a tablet or a computer to protect the eyes;
(2) the invention can fully and uniformly distribute the melanin in the resin, and the molding density of the resin is similar by controlling the pressure in the molding process, so that the distribution of the melanin is further uniform, and the protection effect is improved.
Description of the drawings:
fig. 1 is a schematic flow chart of a method for applying melanin provided by the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the present invention provides a method for applying melanin, which modifies the surface structure of water-soluble melanin similar to that of a light transmission spectrum material of a human lens, and assumes the surface structure as a hydrophilic structure since the water-soluble melanin is always present in an aqueous environment, and the surface of the molecular structure must be modified into a hydrophobic structure, which is collectively referred to as: "synthetic lens pigment" is prepared by absorbing and dispersing the modified synthetic lens pigment in liquid plastic resin (including polyvinyl alcohol solid plastic film) to obtain lens of ophthalmic device or optical device of optical filter.
In the invention, the melanin can be dispersed in the ARM, and the mixed ARM is made into a protective film of a mobile phone, a tablet or a computer display screen to protect eyes.
Melanin is used as a medium of an anti-electromagnetic radiation absorption color developing agent and a radiation absorption pigment, and is injected into plastic, glass optical lenses and other various filters to protect eyes and skin from being damaged by radiation from an artificial light source and a natural light source, the radiation wavelength absorbed by the melanin can reach as high as 2500 nanometers and can reach as low as about 200 nanometers, the radiation quantity absorbed by the melanin is continuously increased along with the shortening of the radiation wavelength, and the lens containing the melanin is placed in front of the eyes to provide strong radiation and harmful light protection for the cornea, crystalline lens and retina; synthetic lens colorants include the polymerization product of 3-hydroxykynurenine.
The enhanced dispersion of the synthetic lens pigment reduces the scattering and fogging of the blocking light in the final lens or filter product, and after purification, the material can be compounded with a liquid plastic resin in a thermosetting casting process or in a thermoplastic injection molding process.
According to the application method provided by the invention, natural melanin, melanin prepared by a synthetic method or any other type of melanin can be used for the light-absorbing pigment, and when such lenses are tested in a plurality of tests (such as Farnsworth-Munsell color development test), a slight difference between the transmission spectrum of the in vitro synthetic lens pigment and the transmission spectrum simulated by the synthetic artificial dye can cause a significant difference in color perception. These differences are likely to be ignored if the task of mimicking the transmission spectrum is left to the optician or optometrist.
Many artificial dyes will be required to better mimic the in vitro synthetic lens pigment transmission spectrum and therefore, after a certain length of exposure to sunlight, these artificial fuels will fade due to non-uniform dyeing speed, resulting in a more different transmission spectrum.
The polyvinyl alcohol/melanin film prepared according to the present invention achieves a lower percentage of light transmission with a small thickness, and even though the concentration of melanin in polyvinyl alcohol is high (about 10%), melanin can be uniformly dispersed without aggregation and fogging, and without excessive light scattering, thus achieving higher performance in the application of ophthalmic devices.
Melanin is capable of absorbing the ultraviolet radiation that produces superoxide on the surface of the eye, and thus any melanin containing medium, whether contact lenses, sunglasses, or the like, prevents superoxide from causing damage to the eye and other deleterious effects described above.
The melanin can effectively prevent aging and regulate free radicals; the advantages of reducing such free radicals by heat or light present in molecules in the vicinity of melanin macromolecules and leading to melanin being a light absorbing pigment in radioprotective media include: the melanin has the functions of light resistance, heat resistance and chemical degradation; the melanin has a broad-band light absorption function; the absorption spectrum covers the entire solar spectrum; the absorption coefficient of melanin is continuously increased along with the gradual shortening of the wavelength (stronger damage); the absorption coefficient of the pigment can not be degraded; the pigment has photosensitivity; namely, the melanin is blackened immediately after being exposed to light; this blackening process is a reversible oxidation reaction of the polymer with free radical intermediates.
The present invention provides a melanin pigment for absorbing ultraviolet, visible and near infrared rays from artificial light sources and natural light sources. The sunglass lens can better protect retina and crystalline lens without interfering color vision. Protection of the retina is enhanced while reducing high-energy visible (HEV) light. In using such sunglass lenses, the color perception may be affected while the violet and blue light is reduced. A decrease in color perception may occur when using lenses made of synthetic lens colorants in vitro, because the light transmission of such lenses is very similar to that of the human crystalline lens, and the neurophysiologic properties of the eye-brain system are very well adapted to the human crystalline lens. The polymer precursor 30HKyn actually used in the in vivo polymerization synthesis should be most representative of the light transmission spectrum of naturally occurring eye pigment.
Melanin keeps visual acuity in addition to protecting the eyes over a wide spectral range because melanin both successfully and naturally filters out potentially high energy damaging visible light in each wavelength, while completely absorbing the energy of the light.
Melanin absorbs harmful ultraviolet rays and HEV wavelengths in the iris, helps the base of the lens block harmful light rays, and thus reduces the risk of cataract
The melanin provides an optimal protective layer for retinal pigment epithelial cells (behind retina) in the eye, plays an important role in the health of the eye, and reduces the damage of macular degeneration
Melanin has the unique property of filtering harmful light while maintaining the entire color spectrum, maintaining the balance of colors seen by both eyes.
The melanin in the eyes is like a black box in a camera, so that the light catapulting (especially HEV light) is reduced, the glare is reduced, the contrast of the visual field is improved, and the vision is more acute
The melanin is synthesized in the glasses, which not only can protect the eye health and improve the vision, but also provides a convenient, economical and feasible good product for people
The selective filtration can protect the eyes by wearing a pair of melanin glasses
Melanin glasses-reducing glare and enhancing visual perception
The melanin glasses filter the ultraviolet and HEV rays that produce reflected and scattered light in the eyes, thereby greatly reducing glare and increasing visual contrast
Melanin glasses-reduce harmful HEV light by absorbing a certain percentage of the spectrum of light, rather than simply blocking high energy light, and do not harm the original hue of the color.
The invention also provides a preparation method of the melanin lens, which comprises the following steps:
step 100, obtaining water-soluble melanin;
200, modifying water-soluble melanin to obtain a synthetic lens pigment;
step 300, purifying the synthesized lens pigment;
step 400, absorbing and dispersing the purified synthetic lens pigment in liquid plastic resin or ARM;
step 500, the liquid plastic resin is made into an optical device or ARM is made into a protective film.
In the present invention, melanin is natural melanin extracted from plants, and a hydrophilic structure of the surface is modified into a hydrophobic structure by a modification method, thereby obtaining a synthetic lens pigment. In addition, in this embodiment, in order to avoid the influence of impurities on the lens, it is necessary to further perform a cleaning process on the synthetic lens dye, and in step 300, a specific step of performing the cleaning process on the synthetic lens dye is to deposit impurities by changing the temperature.
Because the solubility of different components in the solution is different, the solubility of impurities in the solution can be changed by increasing or reducing the temperature, so that the impurity components in the solution are separated out under the separation action, the aim of purifying and removing impurities is fulfilled, the temperature is required to be kept away from the solubility of the effective components when the temperature is adjusted, and the aims of removing impurities and leaving the effective components are fulfilled.
In this embodiment, in order to improve the action of melanin, it is necessary to uniformly disperse melanin in a resin, and therefore, in step 400, a specific method for absorbing and dispersing a synthetic lens pigment is:
adding the synthetic lens pigment into the alcohol solution, and continuously stirring until the synthetic lens pigment is completely dissolved in the alcohol solution;
introducing compressed air into the dissolved alcohol solution, increasing the pressure of the mixed solution, and maintaining the pressure for stirring and mixing;
dispersing the mixed alcohol solution with high pressure into liquid plastic resin successively, and distilling at reduced pressure and low temperature while stirring until all alcohol in the solution is evaporated.
In the above method, the pigment can be dissolved therein without destroying its original structure by selecting an alcohol solution, and in the present embodiment, the alcohol solution is preferably ethanol which can dissolve an organic substance and can dissolve the organic substance at an arbitrary ratio to water.
In the invention, the melanin is completely dissolved by ethanol, air is pressed in a high-pressure mode after the melanin is detected, the pressure is gradually reduced after the melanin is mixed, so that the gas originally dissolved in the melanin overflows, and the solution is mixed by the overflow and dispersion of the gas, thereby improving the dispersion and mixing of the melanin in the liquid plastic resin. And is assisted by stirring during the dispersion process to further improve the mixing effect.
In this embodiment, step 500 is to combine the synthetic lens pigment with the liquid plastic resin to obtain the lens by using a thermosetting casting process or a thermoplastic injection molding process.
In step 500, the thermosetting casting molding or thermoplastic injection molding comprises the following specific steps:
selecting a mold, uniformly spraying a release agent on the inner surface of the mold, closing the mold and sealing an outlet to check the air tightness of the mold;
filling protective gas into the mold after the mold is completely airtight, temporarily closing the filling hole, and arranging a vertical liquid storage pipe on the filling hole;
heating a specified amount of liquid plastic resin to a specified stability, filling the liquid plastic resin through a filling hole at one time, and temporarily storing the liquid plastic resin in a liquid storage pipe;
the outlet is opened in sequence to allow the liquid plastic resin to flow into the mold, closed when the outlet has the liquid plastic resin flowing out, and the other outlets are opened in sequence until filling is completed.
In this embodiment, the casting or injection molding is realized in an airtight manner, and the function of the injection molding is to inject a prepared amount of mixed liquid into a temporary liquid storage pipe, and gradually release the pressure to enable the mixed liquid to gradually enter a mold, so as to complete the corresponding molding operation.
According to the invention, by adopting the mode, the mixed liquid can enter any place in the mold, the aggregation degrees of the mixed liquid at all places are similar, the uniformity degree after molding is improved, the uniform distribution of melanin in the lens is facilitated, and the protective capability of the lens is improved. The pressure of filling the protective gas is 0.4-0.8 MPa, so that the liquid can orderly flow to all parts in the die.
In addition, in order to ensure the uniformity and edge smoothness of the mold formation, the mold is preheated to the temperature after the liquid plastic resin is heated before the protective gas is filled.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. An application method of melanin is characterized by that the surface structure of water-soluble melanin identical to light transmission spectrum material of human crystalline lens is modified, and the hydrophilic structure of surface is modified into hydrophobic structure, then the synthetic lens pigment obtained after modification is absorbed and dispersed in liquid plastic resin or ARM so as to obtain the invented product.
2. The method of claim 1, wherein the synthetic lens pigment comprises a polymer product of 3-hydroxykynurenine.
3. The method of claim 2, wherein the synthetic lens pigment is purified and then combined with the liquid plastic resin by a thermosetting casting process or a thermoplastic injection molding process.
4. The method of claim 3, wherein the liquid plastic resin comprises a polyvinyl alcohol solid plastic film.
5. The preparation method of the melanin lens is characterized by comprising the following steps:
step 100, obtaining water-soluble melanin;
200, modifying water-soluble melanin to obtain a synthetic lens pigment;
step 300, purifying the synthesized lens pigment;
step 400, absorbing and dispersing the purified synthetic lens pigment in liquid plastic resin or ARM;
step 500, the liquid plastic resin is made into an optical device or ARM is made into a protective film.
6. A method for preparing a melanin lens according to claim 5, wherein in step 300, the specific steps of purifying the synthetic lens pigment are as follows: impurities are precipitated by changing the temperature.
7. A method for preparing a melanin lens according to claim 5, wherein in step 400, the absorption and dispersion of the synthetic lens pigment are carried out by:
adding the synthetic lens pigment into the alcohol solution, and continuously stirring until the synthetic lens pigment is completely dissolved in the alcohol solution;
introducing compressed air into the dissolved alcohol solution, increasing the pressure of the mixed solution, and maintaining the pressure for stirring and mixing;
dispersing the mixed alcohol solution with high pressure into liquid plastic resin successively, and distilling at reduced pressure and low temperature while stirring until all alcohol in the solution is evaporated.
8. A method as claimed in claim 5, wherein step 500 comprises combining synthetic lens pigment with the liquid plastic resin to obtain the lens by a thermosetting casting process or a thermoplastic injection molding process.
9. A method for preparing a melanin lens according to claim 5, wherein in step 500, the thermosetting casting molding or thermoplastic injection molding comprises the following specific steps:
selecting a mold, uniformly spraying a release agent on the inner surface of the mold, closing the mold and sealing an outlet to check the air tightness of the mold;
filling protective gas into the mold after the mold is completely airtight, temporarily closing the filling hole, and arranging a vertical liquid storage pipe on the filling hole;
heating a specified amount of liquid plastic resin to a specified stability, filling the liquid plastic resin through a filling hole at one time, and temporarily storing the liquid plastic resin in a liquid storage pipe;
the outlet is opened in sequence to allow the liquid plastic resin to flow into the mold, closed when the outlet has the liquid plastic resin flowing out, and the other outlets are opened in sequence until filling is completed.
10. The method for preparing a melanin lens according to claim 9, wherein the pressure of the filling of the protective gas is 0.4-0.8 MPa, and the mold is preheated to the temperature of the liquid plastic resin after heating before the filling of the protective gas.
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| CN201910998952.XA CN110888242B (en) | 2019-10-21 | 2019-10-21 | Application method of melanin and preparation method of melanin lens |
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