CN-121975174-A - Surface touch-resistant extinction flexible film, preparation method and application thereof, and flexible extinction component

CN121975174ACN 121975174 ACN121975174 ACN 121975174ACN-121975174-A

Abstract

The application relates to the field of surface engineering, and discloses a surface touch-resistant extinction flexible film, a preparation method and application thereof and a flexible extinction component. The extinction flexible film adopts nano carbon black and extinction powder as fillers, and flexible organic silicon resin as a binder to provide bonding performance, the film adopts a structure of a base coat and a surface coating, and on the basis of optimizing the formula of the base coat and the surface coating, the film presents a micro-nano rough structure of the base coat with higher uniform covering property and the surface coating, meanwhile, by using the binder materials of the base coat and the surface coating, the integral coating structure without a definite interface but different functional purposes between the base coat and the surface coating is realized, the touch-resistant micro-nano rough coating surface matched with polyimide high flexibility folding and unfolding characteristics is formed, and the touch-resistant ultra-high absorptivity flexible film capable of meeting engineering application and resisting large-angle light scattering is obtained and can be used as a flexible shading material of a space telescope.

Inventors

ZHANG DONG
BAI JINGYING
PING TUO
WEN CHEN
DING WEI
ZHANG JIAQIANG
LI SIZHEN
LI CONG

Assignees

北京星驰恒动科技发展有限公司
北京卫星制造厂有限公司

Dates

Publication Date: 20260505
Application Date: 20251217

Claims (10)

1. A extinction flexible film, which is characterized by comprising a polyimide substrate, a bottom coating and a top coating; The primer layer is arranged on at least one surface of the polyimide substrate along the thickness direction of the polyimide substrate, and the top coating layer is arranged on at least one surface of the primer layer along the thickness direction of the polyimide substrate; The surface coating comprises a first organic silicon resin, carbon black, extinction powder and a curing agent, wherein the surface coating comprises a second organic silicon resin, carbon black, extinction powder and a curing agent, and the second organic silicon resin comprises vulcanized silicone resin and vulcanized silicone rubber.
2. A matted flexible film according to claim 1, characterized in that the curing agent comprises TEOS, organotin catalyst, silane coupling agent.
3. A matted flexible film according to claim 2, characterized in that the mass ratio of TEOS, organotin catalyst, silane coupling agent and silicone resin is (0.01-0.15): 0.01-0.05: 0.5-1.5.
4. The matted flexible film according to claim 1, characterized in that the pigment ratio in the primer layer is 1 (5-10), the pigment ratio in the topcoat layer is 1 (1.5-2.5), and the pigment ratio is the ratio of the total weight of carbon black and matting agent to the weight of silicone resin.
5. A method of making a matt flexible film in accordance with claim 1, comprising: s1, uniformly mixing an organic solvent, a first organic silicon resin, carbon black and extinction powder to obtain a primer, adding a curing agent into the primer, spraying the primer on the surface of a polyimide substrate, and curing to obtain the polyimide substrate with a bottom coating; And S2, uniformly mixing the organic solvent, the second organic silicon resin, the carbon black and the extinction powder to obtain a finish paint, adding a curing agent into the finish paint, spraying the finish paint on the surface of the base coat of the polyimide substrate, and curing to obtain the extinction flexible film.
6. The method of claim 5, wherein the polyimide substrate is surface-sprayed with a surface treatment agent.
7. The method of claim 5, wherein curing in S1 comprises curing at room temperature for 2.5-3.5 hours.
8. The method according to claim 5, wherein the organic solvent comprises one or more of butyl acetate, xylene, and isopropyl alcohol.
9. Use of a matt flexible film as claimed in any of claims 1 to 4 for the production of a matt component.
10. A flexible matting member comprising a substrate and a matting flexible film disposed on the surface of the substrate, the matting flexible film comprising a matting flexible film as defined in any one of claims 1 to 4.

Description

Surface touch-resistant extinction flexible film, preparation method and application thereof, and flexible extinction component Technical Field The application relates to the field of surface engineering, in particular to a surface touch-resistant extinction flexible film, a preparation method and application thereof and a flexible extinction component. Background With the rapid development of the fields of space detection and the like, the requirements of space cameras, space telescopes and the like (such as weber astronomical telescopes, hamper astronomical telescopes and the like) on stray light suppression are further improved, the black polyimide carbon film adopted by the flexible light shielding plate materials of the optical systems at present has lower light absorptivity, specular reflection is shown under a large angle, stray light suppression capability is weak, imaging stability is affected, observation requirements of higher precision and resolution are difficult to meet, and meanwhile, the currently developed extinction coating with the solar absorption ratio exceeding 0.98 cannot be used for flexible substrates of polyimide films, cannot be touched after surface coating construction, and further use of the film products is affected. In the prior art, high absorptivity is realized through materials such as a nano-pore structure, carbon aerogel and graphene, but the materials are focused on single wavelength or broadband absorption, and the materials cannot have high absorptivity under the light rays with different incident angles. Meanwhile, although the adhesion or weather resistance is paid attention to the current extinction coating, systematic research on the touch resistance of the surface of the coating is not performed. In addition, the current polyimide film product focuses on the field of electronic products, is not suitable for the field of surface engineering for deep space exploration, and has the problems of insufficient light absorption performance, inappetence to touch and rub on the surface and the like. Disclosure of Invention In view of the above, the application aims to provide a surface touch-resistant extinction flexible film and a preparation method thereof, so that the extinction flexible film has excellent performance that solar absorptivity (alpha S) is higher than 0.980 under incident light of 0-65 degrees, the surface of the flexible film can resist bare hand touch rubbing, and a surface micro-nano rough structure is kept intact; Another object of the present application is to provide an application of the extinction flexible film in preparing an extinction component, and to provide a flexible extinction component, which has excellent performance brought by the extinction flexible film, and can be applied to a light shielding plate of an optical system like an astronomical telescope. In order to solve the above technical problems/achieve the above objects or at least partially solve the above technical problems/achieve the above objects, as a first aspect of the present application, there is provided a surface touch-resistant matt flexible film comprising a polyimide substrate, a primer layer and a topcoat layer; The primer layer is arranged on at least one surface of the polyimide substrate along the thickness direction of the polyimide substrate, and the top coating layer is arranged on at least one surface of the primer layer along the thickness direction of the polyimide substrate; The surface coating comprises a first organic silicon resin, carbon black, extinction powder and a curing agent, wherein the surface coating comprises a second organic silicon resin, carbon black, extinction powder and a curing agent, and the second organic silicon resin comprises vulcanized silicone resin and vulcanized silicone rubber. Optionally, the curing agent comprises TEOS, an organotin catalyst and a silane coupling agent. Further alternatively, the mass ratio of TEOS, the organotin catalyst, the silane coupling agent and the organosilicon resin is (0.01-0.15): 0.01-0.05): 0.5-1.5. Optionally, the pigment ratio in the base coat is 1 (5-10), the pigment ratio in the top coat is 1 (1.5-2.5), and the pigment ratio is the ratio of the total weight of carbon black and extinction powder to the weight of the organic silicon resin. As a second aspect of the present application, there is provided a method for producing a matt flexible film of the present application, comprising: s1, uniformly mixing an organic solvent, a first organic silicon resin, carbon black and extinction powder to obtain a primer, adding a curing agent into the primer, spraying the primer on the surface of a polyimide substrate, and curing to obtain the polyimide substrate with a bottom coating; And S2, uniformly mixing the organic solvent, the second organic silicon resin, the carbon black and the extinction powder to obtain a finish paint, adding a curing agent into the finish paint, spraying the finish paint o