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CN-121991449-A - High-transparency infrared contact lens and preparation method thereof

CN121991449ACN 121991449 ACN121991449 ACN 121991449ACN-121991449-A

Abstract

The invention provides a high-transparency infrared contact lens and a preparation method thereof, and belongs to the technical field of infrared contact lenses. The high-transparency infrared contact lens comprises an organic hydrogel and modified up-conversion nano particles, wherein the mass ratio of the organic hydrogel to the modified up-conversion nano particles is 100:3-8, the organic hydrogel is poly (2-hydroxyethyl methacrylate) hydrogel or silicon-based hydrogel, the specific type of organic hydrogel is combined with the modified up-conversion nano particles, near infrared light invisible to naked eyes can be converted into visible light, the near infrared light detection and perception functions are achieved, the light transmittance and the transparency are good, and the visible light transmittance is not affected.

Inventors

  • TANG YINXI
  • HAO XIAOXIA
  • HE XING

Assignees

  • 甘肃康视丽隐形眼镜有限公司

Dates

Publication Date
20260508
Application Date
20260211

Claims (8)

  1. 1. The high-transparency infrared contact lens is characterized in that raw materials of the high-transparency infrared contact lens comprise organic hydrogel and modified up-conversion nanoparticles, wherein the mass ratio of the organic hydrogel to the modified up-conversion nanoparticles is 100:3-8; the organic hydrogel is poly (2-hydroxyethyl methacrylate) hydrogel or silicon-based hydrogel; The preparation process of the modified up-conversion nano-particles comprises the steps of dispersing the up-conversion nano-particles in dilute hydrochloric acid and hydrophilic substances in sequence, centrifuging and drying to obtain the modified up-conversion nano-particles.
  2. 2. The high transparency infrared contact lens of claim 1, wherein the upconverting nanoparticle comprises one or more of NaYF 4 , er nanoparticle, naYF 4 ：Er 3+ ,Tm 3+ nanoparticle, naYF 4 ：Yb 3+ ,Tm 3+ nanoparticle, naYF 4 ：Yb 3+ ,Er 3+ nanoparticle, and NaGdF 4 ：Yb 3+ ,Er 3+ nanoparticle.
  3. 3. The high-transparency infrared contact lens according to claim 1 or 2, wherein the silicon-based hydrogel comprises, by mass, 20-40 parts of methacryloxypropyl tris (trimethylsiloxy) silane, 15-25 parts of N-vinylpyrrolidone, 10-20 parts of hydroxyethyl methacrylate, 0.5-1.5 parts of ethylene glycol dimethacrylate and 0.3-0.8 part of photoinitiator.
  4. 4. The high transparency infrared contact lens of claim 3, wherein the photoinitiator is 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, or phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide.
  5. 5. The high transparency infrared contact lens of claim 1, wherein the hydrophilic material is a polyethylene glycol solution and/or a hyaluronic acid solution.
  6. 6. The high-transparency infrared contact lens according to claim 1 or 5, wherein the up-conversion nanoparticles are dispersed in dilute hydrochloric acid for 0.5 to 1.5 hours, in a hydrophilic substance for 0.5 to 1.5 hours, and the concentration of the dilute hydrochloric acid is 0.05 to 0.1mol/L, and after the completion of the dispersion in the hydrophilic substance, the modified up-conversion nanoparticles are obtained by centrifugation and drying.
  7. 7. The method for preparing the high-transparency infrared contact lens according to any one of claims 1 to 6, which is characterized by comprising the following steps: Adding the modified up-conversion nano particles into the organic hydrogel, uniformly mixing to obtain a mixed solution, and performing ultraviolet curing on the mixed solution in a contact lens mold to obtain the high-transparency infrared contact lens.
  8. 8. The preparation method of claim 7, wherein the ultraviolet curing time is 15-25 min.

Description

High-transparency infrared contact lens and preparation method thereof Technical Field The invention relates to the technical field of infrared contact lenses, in particular to a high-transparency infrared contact lens and a preparation method thereof. Background Near infrared light refers to electromagnetic waves with wavelengths in the range of 780-2526 nm, and cannot be recognized by human eyes. However, under dark and night sky-free conditions, the radiation of the near infrared spectrum, especially the near infrared spectrum of 1-2 mu m, is much larger than the radiation of the visible light region, and all objects can reflect the near infrared radiation commonly existing in the environment. Light reflected by different objects on near infrared radiation is converted into visible light, and the eyes can observe a night scene. The up-conversion luminescent nanomaterial may convert low-energy near infrared light into high-energy visible light. The up-conversion luminescent nano material has important application value in various fields such as anti-counterfeiting, display, fluorescent imaging, medical treatment and the like due to the characteristics of long fluorescence lifetime, larger specific surface area, narrow luminescent band and the like. The rare earth up-conversion luminescence nano material has the advantages of good light stability, long luminescence service life, low toxicity, no damage to biological tissues and the like, and is particularly suitable for being applied to contact lenses. However, when the nanoparticle content is high, although the light conversion effect increases, the overall light transmittance of the contact lens is inevitably lowered, seriously affecting visibility, and in order to secure high light transmittance, it is necessary to lower the nanoparticle content, at which time the light conversion effect of the contact lens is also lowered. Therefore, it is important to provide an infrared contact lens that improves near infrared light conversion effect, transmittance, and comfort. Disclosure of Invention The invention aims to provide an infrared contact lens with high transparency and a preparation method thereof, aiming at the defects of the prior art. In order to achieve the above object, the present invention provides the following technical solutions: the invention provides a high-transparency infrared contact lens, which is prepared from the following raw materials of an organic hydrogel and modified up-conversion nanoparticles, wherein the mass ratio of the organic hydrogel to the modified up-conversion nanoparticles is 100:3-8; the organic hydrogel is poly (2-hydroxyethyl methacrylate) hydrogel or silicon-based hydrogel; The preparation process of the modified up-conversion nano-particles comprises the steps of dispersing the up-conversion nano-particles in dilute hydrochloric acid and hydrophilic substances in sequence, centrifuging and drying to obtain the modified up-conversion nano-particles. Preferably, the up-conversion nanoparticle comprises one or more of an Er nanoparticle, a NaYF 4：Er3+,Tm3+ nanoparticle, a NaYF 4：Yb3+,Tm3+ nanoparticle, a NaYF 4：Yb3+,Er3+ nanoparticle and a NaGdF 4：Yb3+,Er3+ nanoparticle. Preferably, the silicon-based hydrogel comprises, by mass, 20-40 parts of methacryloxypropyl tris (trimethylsiloxy) silane, 15-25 parts of N-vinylpyrrolidone, 10-20 parts of hydroxyethyl methacrylate, 0.5-1.5 parts of ethylene glycol dimethacrylate and 0.3-0.8 part of a photoinitiator. Preferably, the photoinitiator is 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone or phenyl bis (2, 4, 6-trimethylbenzoyl) phosphine oxide. Preferably, the hydrophilic substance is a polyethylene glycol solution and/or a hyaluronic acid solution. Preferably, the up-conversion nano particles are dispersed in dilute hydrochloric acid for 0.5-1.5 h, in hydrophilic substances for 0.5-1.5 h, the concentration of the dilute hydrochloric acid is 0.05-0.1 mol/L, and after the dispersion in the hydrophilic substances is finished, the modified up-conversion nano particles are obtained by centrifugation and drying. The invention also provides a preparation method of the high-transparency infrared contact lens, which comprises the following steps: Adding the modified up-conversion nano particles into the organic hydrogel, uniformly mixing to obtain a mixed solution, and performing ultraviolet curing on the mixed solution in a contact lens mold to obtain the high-transparency infrared contact lens. Preferably, the ultraviolet curing time is 15-25 min. The invention has the beneficial effects that: 1) After the up-conversion nano particles are modified by adopting dilute hydrochloric acid and hydrophilic substances, oleic acid molecules on the surfaces of the particles can be removed, so that the surface hydrophilicity of the nano particles is improved, the interface effect of the particles and hydrogel is facilitated, the light transmittance of the contac