A nanometer rare earth film

Abstract

The utility model discloses a kind of nanometer rare earth films, including first surface protective layer, first optical control layer, rare earth functional gradient layer, second optical control layer and substrate interface coupling layer arranged in turn from exposure surface to substrate interface;The surface of first surface protective layer is constructed with micro-nano conical column array, first optical control layer inside is constructed with subwavelength grating structure, rare earth functional gradient layer is the convex gradient structure of center thick edge thin, and it is three-dimensional microcavity limited structure formed by abrasion-resistant alumina sublayer and corrosion-resistant porous silica sublayer alternately stacked, second optical control layer inside is constructed with the reverse grating structure of first optical control layer grating period and asymmetric cross arrangement, substrate interface coupling layer has fractal interface structure.The utility model integrates multiple functional modules such as protection, optical control, core function, interface coupling in one, each layer each plays its role and synergistically.

Description

Technical Field

[0001] This utility model relates to the field of nano-rare earth membrane technology, and in particular to a nano-rare earth membrane. Background Technology

[0002] Rare earth nanomaterials, with their unique optical, electrical, and magnetic properties derived from 4f electron transitions, have shown great application potential in cutting-edge fields such as fluorescence conversion, optical displays, radiative cooling, infrared stealth, and photoelectrocatalysis. Integrating rare earth nanomaterials into device systems in the form of functional thin films is one of the key pathways to realizing their industrial application.

[0003] Currently, most common rare-earth nanofilms employ simple single-layer coatings or physically blended composite structures. However, these traditional membrane structures have inherent design flaws, making it difficult for them to meet increasingly stringent application requirements in terms of overall performance. Specifically, this manifests in the following aspects: First, rare earth nanomaterials are generally brittle. When combined with a polymer matrix, they are prone to developing microcracks within the film layer under external or thermal stress. These cracks propagate rapidly, leading to functional failure. Increasing the matrix content or introducing reinforcements to improve mechanical strength significantly dilutes the functional density of the rare earth components, impairing their core optical or chemical properties.

[0004] Secondly, due to the differences in physicochemical properties between the functional film layer and the device substrate (such as glass, PET, etc.), there is significant interfacial stress, resulting in poor adhesion. During long-term use or environmental changes, phenomena such as peeling and blistering are prone to occur, which seriously affect the reliability and service life of the device.

[0005] Furthermore, existing structures are mostly single-function designs, making it difficult to achieve the synergy and optimization of multiple properties (such as high light transmittance, wear resistance, corrosion resistance, and anti-reflection). For example, a densified structure designed to improve the hardness of the membrane often sacrifices its flexibility and impact resistance; while a porous structure, while introducing specific functions, may also provide channels for the penetration of corrosive media in the environment. Utility Model Content

[0006] The technical problem solved by this invention is to provide a nano-rare earth membrane.

[0007] This application provides a nano-rare earth film, comprising a first surface protection layer, a first optical modulation layer, a rare earth functional gradient layer, a second optical modulation layer, and a substrate interface coupling layer sequentially disposed from the exposed surface to the substrate interface. The first surface protection layer, the first optical modulation layer, the rare earth functional gradient layer, the second optical modulation layer, and the substrate interface coupling layer are tightly bonded together by lamination or coating curing processes. The surface of the first surface protection layer is constructed with a micro-nano cone-pillar array, the first optical modulation layer is constructed with a subwavelength grating structure, the rare earth functional gradient layer has a convex gradient structure with a thick center and thin edges, and it is a three-dimensional microcavity confinement structure formed by alternating stacking of wear-resistant alumina sublayers and corrosion-resistant silica porous sublayers. The second optical modulation layer is constructed with a reverse grating structure that is asymmetrically cross-arranged with the grating period of the first optical modulation layer, and the substrate interface coupling layer has a fractal interface structure.

[0008] Furthermore, in the rare earth functional gradient layer, the wear-resistant alumina sublayer is an alumina sublayer, and the corrosion-resistant porous silica sublayer is a porous silica sublayer.

[0009] Furthermore, the period of the subwavelength grating structure of the first optical control layer differs from that of the inverse grating structure of the second optical control layer by ±10%, and the two are arranged in an asymmetrical cross pattern.

[0010] Furthermore, the substrate interface coupling layer is bonded to the PET substrate or glass substrate through its fractal interface structure.

[0011] Furthermore, the first surface protective layer is made of fluorinated silica or polydimethylsiloxane, the first optical control layer is made of titanium dioxide or zirconium oxide, the rare earth functional gradient layer is made of silicone or epoxy resin matrix doped with nano-rare earth particles, the second optical control layer is made of silica or silicon nitride, and the substrate interface coupling layer is made of polyurethane acrylate or silane coupling agent layer.

[0012] Compared with existing technologies, this utility model integrates multiple functional modules such as protection, optical control, core functions, and interface coupling into one, with each layer performing its own function and working together to enhance efficiency; the alternating stacking structure of rare earth functional gradient layers makes wear resistance and corrosion resistance no longer mutually restrictive seesaws, but achieves complementary performance through alternating spatial distribution, while possessing excellent resistance to mechanical wear and chemical media erosion, thus broadening the application scenarios. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of this utility model.

[0014] Figure 1 This is a schematic diagram of the structure of the nano-rare earth membrane of this utility model; Figure 2 This is a schematic diagram of the structure of the rare earth functional gradient layer of this utility model.

[0015] The reference numerals in the attached figures include: 1. First surface protective layer; 2. First optical control layer; 3. Rare earth functional gradient layer; 4. Second optical control layer; 5. Substrate interface coupling layer; 6. Micro / nano cone-pillar array; 7. Subwavelength grating structure; 8. Wear-resistant alumina sublayer; 9. Corrosion-resistant porous silica sublayer; 10. Reverse grating structure; 11. Substrate; 12. Fractal interface structure. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0017] like Figures 1-2 As shown, the nano-rare earth film of this invention includes a first surface protective layer 1, a first optical control layer 2, a rare earth functional gradient layer 3, a second optical control layer 4, and a substrate interface coupling layer 5 arranged sequentially from the exposed surface to the substrate interface. The first surface protective layer 1, the first optical control layer 2, the rare earth functional gradient layer 3, the second optical control layer 4, and the substrate interface coupling layer 5 are tightly bonded together by lamination or coating curing process. The surface of the first surface protective layer 1 is constructed with a micro-nano cone-shaped array 6, which is made of fluorinated silicon dioxide or polydimethylsiloxane; The first optical control layer 2 has a subwavelength grating structure 7 inside, which is made of titanium dioxide or zirconium oxide; The rare earth functional gradient layer 3 is made of a silicone or epoxy resin matrix doped with nano-rare earth particles, exhibiting a convex gradient structure that is thicker at the center and thinner at the edges. It is a three-dimensional microcavity confinement structure formed by alternating stacks of a wear-resistant alumina sublayer 8 and a corrosion-resistant porous silica sublayer 9. The wear-resistant alumina sublayer 8 is an alumina sublayer, and the corrosion-resistant porous silica sublayer 9 is a porous silica sublayer. Figure 2 As shown, this is the structure within a single microcavity. The structures within each microcavity are repeated to form a rare earth functional gradient layer 3. The second optical control layer 4 has an internal reverse grating structure 10 that is asymmetrically cross-arranged with the grating period of the first optical control layer 2. The material is silicon dioxide or silicon nitride. The subwavelength grating structure 7 of the first optical control layer 2 and the reverse grating structure 10 of the second optical control layer 4 have a period difference of ±10%, and the two are arranged in an asymmetrical cross pattern. The substrate interface coupling layer 5 is a polyurethane acrylate or silane coupling agent layer with a fractal interface structure 12. The substrate interface coupling layer 5 is bonded to the PET substrate 11 or glass substrate 11 through its fractal interface structure 12, and the fractal interface structure 12 and the substrate 11 are mechanically interlocked and bonded by van der Waals.

[0018] This utility model integrates multiple functional modules, including protection, optical control, core functions, and interface coupling, into one unit, with each layer performing its own function while synergistically enhancing efficiency. Among them, The unique "three-dimensional microcavity confinement structure" of the rare-earth functionally graded layer 3 divides the brittle functional material into independent micro-units, effectively preventing the propagation of microcracks caused by stress or fatigue across cavities. This fundamentally overcomes the brittle fracture problem of traditional rare-earth films, endowing the film with excellent damage tolerance. Internally, it consists of alternating layers of dense alumina and porous silica, forming a periodic arrangement of "hard phase" and "buffer phase." Alumina provides high hardness and wear resistance, while porous silica absorbs and dissipates stress. Together, they enable the film to maintain high hardness while possessing good toughness and impact resistance. This alternating stacking structure means that wear resistance and corrosion resistance are no longer mutually restrictive, but rather functionally complementary.

[0019] A highly efficient bilayer photonic crystal structure is formed through the synergistic effect of the subwavelength grating of the first optical control layer 2 (TiO2 or ZrO2) and the inverse asymmetric grating of the second optical control layer 4 (SiO2 or Si3N4). The former mainly reduces visible light reflection, achieving anti-reflection; the latter effectively disrupts the waveguide mode in the infrared band, achieving scattering or blocking of specific wavelengths (such as near-infrared). This design significantly improves the utilization rate of incident light and endows the film with dynamic spectral management capabilities.

[0020] The micro-nano conical array 6 of the first surface protective layer 1 (fluorinated SiO2 or PDMS) further assists in broadband anti-reflection by utilizing its "gradient refractive index" effect, while endowing the film with superhydrophobicity and self-cleaning function, reducing the impact of surface contamination on optical performance.

[0021] The fractal interface structure 12 of the substrate interface coupling layer 5 (polyurethane acrylate or silane coupling agent), through its multi-scale rough surface, greatly increases the actual contact area with the PET or glass substrate 11, generating strong van der Waals forces and achieving mechanical interlocking. This fundamentally solves the industry problem of weak adhesion and easy peeling caused by stress mismatch between the film layer and the substrate 11, ensuring the structural integrity and reliability of the device during long-term use.

[0022] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0023] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0024] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A nano-rare earth membrane, characterized in that, The first surface protection layer (1), the first optical control layer (2), the rare earth functional gradient layer (3), the second optical control layer (4), and the substrate interface coupling layer (5) are arranged sequentially from the exposed surface to the substrate interface. The first surface protection layer (1), the first optical control layer (2), the rare earth functional gradient layer (3), the second optical control layer (4), and the substrate interface coupling layer (5) are tightly bonded together by lamination or coating curing process. The surface of the first surface protection layer (1) is constructed with a micro-nano cone-pillar array (6). The first optical control layer (2) is constructed with a subwavelength grating structure (7). The rare earth functional gradient layer (3) has a convex gradient structure with a thick center and thin edges. It is a three-dimensional microcavity confinement structure formed by alternating stacking of wear-resistant alumina sublayer (8) and corrosion-resistant silica porous sublayer (9). The second optical control layer (4) is constructed with an inverse grating structure (10) that is asymmetrically cross-arranged with the grating period of the first optical control layer (2). The substrate interface coupling layer (5) has a fractal interface structure (12).

2. The nano-rare earth film as described in claim 1, characterized in that, In the rare earth functional gradient layer (3), the wear-resistant alumina sublayer (8) is an alumina sublayer, and the corrosion-resistant porous silica sublayer (9) is a porous silica sublayer.

3. The nano-rare earth film as described in claim 2, characterized in that, The period of the subwavelength grating structure (7) of the first optical control layer (2) differs by ±10% from the period of the reverse grating structure (10) of the second optical control layer (4), and the two are arranged in an asymmetrical cross pattern.

4. The nano-rare earth film as described in claim 3, characterized in that, The substrate interface coupling layer (5) is bonded to the PET substrate or glass substrate through its fractal interface structure (12).

5. The nano-rare earth film as described in claim 4, characterized in that, The first surface protective layer (1) is made of fluorinated silicon dioxide or polydimethylsiloxane, the first optical control layer (2) is made of titanium dioxide or zirconium oxide, the rare earth functional gradient layer (3) is made of silicone or epoxy resin matrix doped with nano-rare earth particles, the second optical control layer (4) is made of silicon dioxide or silicon nitride, and the substrate interface coupling layer (5) is made of polyurethane acrylate or silane coupling agent layer.

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