Method for preparing film on contact lens by using plasma-assisted chemical vapor deposition method

Abstract

The invention discloses a method for preparing a film on a contact lens by using a plasma-assisted chemical vapor deposition method. According to the method, plasma modification treatment is carried out on the surface of a base material of the contact lens, so that a functional group with the hydrophilic function is formed on the surface of the base material, then polyethylene glycol methacrylateand N-vinyl-2-pyrrolidone are heated into a gas state, so that the polyethylene glycol methacrylate and the N-vinyl-2-pyrrolidone can be deposited on the surface of the base material by using the plasma-assisted chemical vapor deposition method, so that he film is formed on the surface of the base material, then surface modification is carried out on the contact lens, so that the contact lens canhave good hydrophilicity and stain resistance at the same time by virtue of the film, in addition, crosslinking is formed between the polyethylene glycol methacrylate and the N-vinyl-2-pyrrolidone after the polyethylene glycol methacrylate and the N-vinyl-2-pyrrolidone are deposited, so that the hydrophilicity time of the contact lens can be prolonged, moreover, after verification, protein precipitated on the surface of the lens can be reduces, and therefore the effects of improving the overall comfort level and prolonging the service life can be achieved.

Description

technical field [0001] The invention relates to a method for preparing a thin film on a contact lens by using a plasma-assisted chemical vapor deposition method, in particular to a substrate surface of a contact lens that can be modified by plasma modification and plasma-assisted chemical vapor deposition. A method of forming a thin film on the surface so that the contact lens has good hydrophilicity and anti-staining ability. Background technique [0002] With the research and development and innovation of various electronic and electrical products, it has brought people a lot of convenience in daily life and work, especially the advent of a large number of 3C electronic products, which has also led to the popularization of communication and Internet applications, so that many people are immersed in In the field of use of 3C electronic products, a large number of 3C electronic products have been used for a long time, whether it is office workers, students or middle-aged and...

AI Technical Summary

Problems solved by technology

[0010] Due to the above reasons, after one week of plasma surface modification treatment, the contact angle of the surface of the contact lens will gradually increase and become a hydrophobic surface, and it will return to a homogeneous surface on the 10th to 14th day. Contact lenses without plasma treatment have the same contact angle, but when the wearer wears hydrophobic lenses, the wearer's eyes will feel an uncomfortable foreign body sensation, which will affect the wearer's ability to continue wearing contact lenses Willingness, and hydrophobic lenses are also easy for sediment to attach, the sediment will not only affect the wearer's vision, the comfort of wearing the lens and the wetness of the lens surface, but also the protein precipitation in the sediment can also be used as bacteria It is a breeding ground for growth, and when the protein deposited on the surface of the lens denatures over time, it may induce an immune response in the human body, which in turn may cause signs of corneal infection such as giant papillary conjunctivitis (Giant Papillary Conjunctivitis), acute red eye, etc. Can't wear contact lenses, besides, since the current deposits cannot be completely removed by contact lens cleaners, over time, the deposits will combine with the material of the contact lenses itself, thus shortening the service life of the contact lenses and causing damage to the contact lenses

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