CN107829192B - Textile based on central connection type periodic structure, textile preparation method and application - Google Patents
Textile based on central connection type periodic structure, textile preparation method and application Download PDFInfo
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- CN107829192B CN107829192B CN201711239529.9A CN201711239529A CN107829192B CN 107829192 B CN107829192 B CN 107829192B CN 201711239529 A CN201711239529 A CN 201711239529A CN 107829192 B CN107829192 B CN 107829192B
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- 239000004753 textile Substances 0.000 title claims abstract description 132
- 230000000737 periodic effect Effects 0.000 title claims abstract description 116
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 16
- 239000000758 substrate Substances 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229920000742 Cotton Polymers 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 229920004933 Terylene® Polymers 0.000 claims description 8
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000007747 plating Methods 0.000 claims description 7
- 244000025254 Cannabis sativa Species 0.000 claims description 6
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 6
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 6
- 229920006052 Chinlon® Polymers 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 6
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 6
- 229920002978 Vinylon Polymers 0.000 claims description 6
- 239000004760 aramid Substances 0.000 claims description 6
- 229920003235 aromatic polyamide Polymers 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 6
- 235000009120 camo Nutrition 0.000 claims description 6
- 235000005607 chanvre indien Nutrition 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- 239000011487 hemp Substances 0.000 claims description 6
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 6
- 229920001721 polyimide Polymers 0.000 claims description 6
- 238000007639 printing Methods 0.000 claims description 6
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 6
- 210000002268 wool Anatomy 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 229920002972 Acrylic fiber Polymers 0.000 claims description 4
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 4
- 238000003698 laser cutting Methods 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 239000000049 pigment Substances 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 239000011701 zinc Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract description 28
- 238000009423 ventilation Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000005034 decoration Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000007772 electroless plating Methods 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229920006253 high performance fiber Polymers 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010023 transfer printing Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000001413 cellular effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010021 flat screen printing Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D1/00—Woven fabrics designed to make specified articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
- B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/003—Transfer printing
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06Q—DECORATING TEXTILES
- D06Q1/00—Decorating textiles
- D06Q1/12—Decorating textiles by transferring a chemical agent or a metallic or non-metallic material in particulate or other form, from a solid temporary carrier to the textile
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Woven Fabrics (AREA)
Abstract
The invention relates to a textile based on a central connection type periodic structure, a textile preparation method and application, wherein the textile forms the central connection type periodic structure by a conductive area and a non-conductive area; the non-conductive areas are not communicated with each other, and a cross-shaped or Y-shaped central connection non-conductive structure is adopted to form a cross-shaped periodic structure unit or a Y-shaped periodic structure unit together with the corresponding conductive structure; the invention can obtain light and flexible textile which can shield other electromagnetic wave hazards but does not affect the 2G, 3G or 4G network of mobile phone communication; compared with the conventional electromagnetic shielding fabric which is entirely coated with metal or has certain conductive performance, the textile has only a localized conductive part, so that the textile has not only frequency selective ventilation performance, but also better ventilation wearing performance and comfort performance.
Description
Technical Field
The invention relates to a textile with a periodic structure based on a central connection type, which can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies, a preparation method of the textile and application of the textile in curtains, wall decorations and the like, and belongs to the technical field of technical textiles.
Background
In real life, mobile phone communication has become a necessity for life. The communication frequency of the communication, mobile or telecommunication mobile phone of the existing 2G, 3G and 4G networks in China is in three frequency ranges of 0.9-1.0 GHz, 1.8-2.0 GH and 2.3-2.6 GHz. In addition to cellular frequencies, there are various unpredictable, electromagnetic waves of different frequencies that can affect more or less living or normal communication needs, such as television channels in the 48.5-958 MHz frequency range, wireless local area networks WLANs in 5.8GHz, and other frequency bands. Therefore, a frequency selective transparent textile capable of cutting off electromagnetic waves of other frequencies through mobile phone communication frequency electromagnetic waves is developed, and the textile has a great potential application space, for example: a curtain, a wall, etc. having shielding performance and not affecting mobile phone communication are required.
The existing electromagnetic shielding fabric is generally woven by metal blended yarns or is obtained by integrally plating a metal layer on the surface of the fabric, so that the fabric has shielding effectiveness meeting the requirements, such as higher than 40dB, in a specified electromagnetic wave frequency range, such as 1-18 GHz. The fabrics are shielded by directly reflecting electromagnetic waves, and have certain conductivity, consume a certain amount of metal fibers or have certain metal coating thickness; meanwhile, for electromagnetic waves in the shielding wave band, no matter any frequency, the electromagnetic waves are uniformly reflected. In the electromagnetic field, the frequency selective surface is used as a structure capable of selectively passing electromagnetic waves with certain frequencies and cutting electromagnetic waves with other frequencies, and is applied to various fields such as communication, antennas, radars and the like, and is also a research hot spot. However, the frequency selective surface is currently limited to rigid materials, such as metal patches on rigid media or periodic holes formed in metal plates, and has the disadvantages of being hard, difficult to process, difficult to compound in multiple layers, and the like. Shi Meiwu et al propose research ideas for textile electromagnetics and electromagnetic textile development, by means of a metallized textile technology, reference is made to the periodic structure of the frequency selective surface, and the periodic array of metal conductive or nonconductive dielectric parts in the shape of squares, circles, jersey coolants, dipoles, etc. is distributed on the dielectric textile or the surface of the conductive textile, etc., so that frequency selective transmission of textile materials can be achieved, and rough processing and preparation methods are proposed. The prior art presents a rough preparation method and a viable basic principle, but is a very complex scientific problem for specific applications and design principles of frequency selective surfaces, etc.
For a specific frequency and requirement, in order to successfully develop a satisfactory product, the following aspects also need to be carefully studied: 1) The shape of the periodic structure needs to be designed: the common periodic structures are four kinds, including annular, central connection, solid, combined and the like, different structural shapes need to be prepared by different methods and are suitable for specific purposes, for example, the annular structure is not suitable for direct etching on a conductive substrate, and the solid structure is not suitable for low-frequency resonance points and the like; 2) The periodic structure size needs to be calculated: on one hand, for a certain specific frequency, the sizes corresponding to different shapes are obviously different, so that the practical performance is affected; on the other hand, the sizes of the periodic structures correspond to different meanings, cannot be selected at will, and the too large size of part can lead to grating lobes, the too small size can lead to difficult processing and the like; 3) Considering the difference of the conductive base material and the non-conductive base material, the difference of the conductivity of the conductive part can cause the difference of the resonance frequency; 4) Combination of necessary simulation theoretical calculations and actual experience: as the combination of structure, dimensions and substrates becomes very variable, it is essential to incorporate the necessary theoretical calculations on the basis of known experience in order to develop a suitable material with a specific resonance frequency. Obviously, for selective transmission of specific frequencies, strict theoretical calculation and experimental verification are needed, and a proper periodic structure is selected, the size and the distribution of the periodic structure are more accurate, and a proper specific preparation method is matched; and in terms of application, there are special requirements in order to guarantee the periodicity and planarity of the structure.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a textile with a periodic structure based on a central connection type, which can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies, and a preparation method and application of the textile.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the textile based on the central connection type periodic structure is used for selectively passing mobile phone signals and cutting off electromagnetic waves with other frequencies, and is characterized in that the textile forms a central connection type periodic structure by a conductive area and a non-conductive area; the non-conductive areas are not communicated with each other, and the non-conductive areas adopt cross-shaped center connection non-conductive structures or Y-shaped center connection non-conductive structures, and form cross-shaped periodic structure units or Y-shaped periodic structure units together with the corresponding conductive structures; each cross-shaped periodic structure unit is a square area with a side length of D, a cross-shaped non-conductive structure is arranged in the square area, the rest part of the square area except for the cross-shaped non-conductive structure is a conductive structure, the arm length of the cross-shaped non-conductive structure is r, the arm width is a, D is 60-144 mm, r is 26-70 mm, and a is 2-8 mm; the cross periodic structure unit arrays are arranged to form a cross periodic structure; each Y-shaped periodic structure unit is a square area with a side length of D, a Y-shaped non-conductive structure is arranged in the square area, the rest part of the square area except for the Y-shaped non-conductive structure is a conductive structure, the arm length of the Y-shaped non-conductive structure is r, the arm width is a, wherein D is 68-164 mm, r is 30-80 mm, and a is 2-6 mm; and a plurality of Y-shaped periodic structure unit arrays are arranged to form a Y-shaped periodic structure.
Further, the conductive area is a transfer printing, coating or plating metal layer, and the metal layer is a composite coating or plating layer of silver, copper, zinc, aluminum, iron nickel and copper nickel compounded with one or more metals; the metal layer is woven by metal or metallized fiber yarns.
Further, the non-conductive area is a conventional textile, and the conventional textile is various textiles formed by cotton, hemp, wool or silk; or various textiles composed of terylene, chinlon, acrylic fiber or vinylon; or various textiles composed of UHMWPE, aramid or polyimide; or blends or interweaves of the foregoing types of fibers.
Further, the conductivity of the conductive region is not lower than 10 4 S/m。
In order to achieve the above purpose, the present invention adopts the following technical scheme: the preparation method of the textile based on the central connection type periodic structure is characterized by comprising the following steps of: the method comprises the steps of (1) coating a conductive part of a central connection-shaped periodic structure on a non-conductive textile substrate according to the designed central connection-shaped periodic structure and the size requirement by adopting a gilding paper gilding mode, a local chemical plating mode or a magnetron sputtering mode and a conductive pigment printing mode; or cutting the non-conductive part of the central connection type periodic structure according to the designed central connection type periodic structure and the size requirement by adopting a laser cutting and computer carving mode on the conductive textile substrate to obtain the textile with the central connection type periodic structure unit array formed by the conductive area and the non-conductive area, wherein the textile can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies.
Further, the non-conductive textile substrate does not have conductivity, and refers to various textiles formed by cotton, hemp, wool or silk; or various textiles composed of terylene, chinlon, acrylic fiber and vinylon; or various textiles composed of UHMWPE, aramid or polyimide; or blends or interweaves of the foregoing types of fibers.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the application of the textile based on the central connection type periodic structure is characterized in that when the textile is applied to curtains and wall decorations, the textile is cut according to the size of the curtains or the size of the wall decorations, so that at least 10 crisscross or Y-shaped periodic structure units are respectively contained in the warp and weft directions of the textile, and the curtains and the wall decorations which can selectively shield other electromagnetic signals through mobile phone signals are prepared.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. through researches and experiments for many years, the textile based on the central connection type periodic structure is provided based on strict theoretical calculation, sample preparation verification and fine structural design, the textile which can be selectively cut off electromagnetic signals of a mobile phone and is easy to prepare by other frequency electromagnetic waves is further provided, the textile is further applied to curtains, wall decoration fabrics and the like, the requirements of mobile phone communication of buildings and the like with shielding and protecting performances are met, and dangers possibly caused by other electromagnetic waves are effectively protected. 2. The invention is only aimed at textile products and preparation methods thereof for the mobile phone signal to pass through and cut off other frequencies, but is also applicable to other frequency selective textile products with the same periodic structure shape and preparation methods thereof, and can obtain light and flexible textile products which shield other electromagnetic wave hazards but do not affect mobile phone communication 2G, 3G or 4G networks; the central connection type periodic structure of the textile has the advantages of larger size, simple structure, convenient processing and capability of meeting the requirement of higher processing precision. 3. The central connection type periodic structure of the textile has plane symmetry, has angular stability to electromagnetic waves, and has good frequency selective transmission performance to electromagnetic waves in all directions; compared with the conventional electromagnetic shielding fabric which is entirely coated with metal or has certain conductive performance, the textile has only a localized conductive part, so that the textile has not only frequency selective ventilation performance, but also better ventilation wearing performance and comfort performance.
Drawings
FIG. 1 is a schematic diagram of the structure of a textile according to the present invention, (a) a textile having a crisscross periodic structure, (b) a textile having a Y-shaped periodic structure;
FIG. 2 is a schematic view of a center-connected periodic structure unit of a specific shape of the present invention, (a) is a schematic view of a cross-shaped periodic structure unit, and (b) is a schematic view of a Y-shaped periodic structure unit;
FIG. 3 is a graph of electromagnetic reflectance in terms of Freq (frequency) on the abscissa, GHz on the ordinate, reflection Coefficient (reflectance) on the ordinate, dB for the textile of example 1 of the present invention;
FIG. 4 is a graph of electromagnetic reflectance in GHz, and in dB, for the textile of example 2 according to the invention, with Freq (frequency) on the abscissa and Reflection Coefficient (reflectance) on the ordinate;
FIG. 5 is a graph of electromagnetic reflectance in terms of Freq (frequency) on the abscissa, GHz on the ordinate, reflection Coefficient (reflectance) on the ordinate, dB for the textile of example 3 of the present invention;
FIG. 6 is a graph of electromagnetic reflectance in GHz, and in dB for textile product example 4, plotted against Freq (frequency) and Reflection Coefficient (reflectance);
FIG. 7 is a graph of electromagnetic reflectance in GHz, and in dB for textile product example 5, plotted against Freq (frequency) and Reflection Coefficient (reflectance);
fig. 8 is a graph of electromagnetic reflectance in terms of Freq (frequency) on the abscissa, GHz and Reflection Coefficient (reflectance) on the ordinate, dB for the textile of example 6 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for the purposes of providing a better understanding of the invention and are not to be construed as limiting the invention.
As shown in figure 1, the textile based on the central connection periodic structure provided by the invention is a central connection periodic structure formed by conductive areas and non-conductive areas, and the non-conductive areas are not communicated with each other. The central connection type periodic structure is formed by patterns with specific structures and sizes, and the central connection type periodic structure adopts cross-shaped periodic structure units or Y-shaped periodic structure unit arrays for arrangement.
As shown in fig. 2 (a), the cross periodic structure unit is a square area with a side length D, a cross non-conductive structure 2 with an arm length r and an arm width a is arranged in the square area, and the rest area 1 except the cross non-conductive structure 2 in the square area is a conductive structure, wherein D is 60-144 mm, r is 26-70 mm, and a is 2-8 mm. The cross periodic structure is formed by a plurality of periodic structure unit arrays which are arranged and composed of conductive structures 1 and cross non-conductive structures 2.
As shown in fig. 2 (b), the Y-shaped periodic structure unit is a square area with a side length D, a Y-shaped non-conductive structure 2 with an arm length r and an arm width a is arranged in the square area, the rest area 1 except the Y-shaped non-conductive structure 2 in the square area is a conductive structure, wherein D is 68-164 mm, r is 30-80 mm, a is 2-6 mm, and the Y-shaped periodic structure unit is arranged in an array form formed by a plurality of conductive structures 1 and cross-shaped non-conductive structures 2.
In a preferred embodiment, the conductive areas are transferred, coated or plated metal layers, which may be composite coatings or platings of one or more metals of silver, copper, zinc, aluminum, iron nickel, copper nickel composite, etc.; the metal layer can also be woven by metal fiber or metallized fiber yarn.
In a preferred embodiment, the non-conductive area is a conventional textile, which is made of various natural fibers such as cotton, hemp, wool, and silk, or various common chemical fibers such as terylene, nylon, acrylic, and vinylon, or various high-performance fibers such as UHMWPE, aramid, and polyimide, or a blend or interweaved textile of the foregoing fibers.
In a preferred embodiment, the conductivity of the conductive region is 10 4 S/m or more.
The invention also provides a preparation method of the textile based on the central connection type periodic structure, which comprises the following specific processes:
the method comprises the steps of (1) coating a conductive part of a central connection-shaped periodic structure on a non-conductive textile substrate according to the designed central connection-shaped periodic structure and the size requirement by adopting a gilding paper gilding mode, a local chemical plating mode or a magnetron sputtering mode and a conductive pigment printing mode; or on the conductive textile substrate, adopting a laser cutting and computer carving mode, cutting off the non-conductive part of the central connection periodic structure according to the designed central connection periodic structure and the size requirement, and obtaining the textile which is formed by the conductive area and the non-conductive area and is formed by arranging the central connection periodic structure unit arrays and can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies.
In a preferred embodiment, the non-conductive textile substrate refers to various textiles formed by various natural fibers such as cotton, hemp, wool, silk and the like, various common chemical fibers such as terylene, chinlon, acrylic, vinylon and the like, or high-performance fibers such as UHMWPE, aramid, polyimide and the like, or blended or interwoven textiles of the various fibers, and does not have conductive performance.
In a preferred embodiment, the bronzing of the bronzing paper refers to taking a cross-shaped structure or a Y-shaped structure as a pattern, engraving a pattern of a central connection-shaped periodic structure on a press roller of a bronzing machine, and transferring the cured bronzing slurry on the bronzing paper onto a textile substrate in a gravure printing mode; or according to the pattern of the central connection periodic structure, manufacturing a screen printing plate, and screen printing the gold stamping paste on the textile substrate. The gold stamping paste has certain conductivity, so that the textile which is formed by arranging central connection type periodic structure units formed by conductive areas and non-conductive areas and can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies is obtained.
In a preferred embodiment, the local electroless plating or magnetron sputtering refers to masking a non-conductive area on a fabric substrate according to a cross-shaped or Y-shaped periodic structure and size requirements, and then performing electroless plating or magnetron sputtering to obtain a conductive area, thereby obtaining a textile with central connection-shaped periodic structure units formed by the conductive area and the non-conductive area arranged in an array manner, and the textile can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies.
In a preferred embodiment, the printing of the conductive paint refers to designing a cylinder or flat screen printing roller according to the cross or Y-shaped periodic structure and the size requirement, and printing conductive powder paint containing copper powder, silver powder, aluminum powder or copper-coated silver powder on a textile substrate, thereby obtaining a textile with central connection-shaped periodic structure units formed by conductive areas and non-conductive areas arranged in an array, and the textile can selectively pass mobile phone signals and cut off electromagnetic waves with other frequencies.
In a preferred embodiment, the surface conductivity of the conductive textile is 10 4 S/m or more.
In a preferred embodiment, the laser cutting refers to cutting the conductive textile substrate according to the cross-shaped or Y-shaped periodic structure and the size requirement, cutting the non-conductive area in the central connection-shaped periodic structure, and only leaving the conductive area part, thereby obtaining the textile with the central connection-shaped periodic structure composed of the conductive area and the non-conductive area arranged in an array, and the textile can selectively pass through the mobile phone signal and cut off electromagnetic waves with other frequencies.
In a preferred embodiment, computer engraving refers to cutting the conductive textile substrate by a computer-controlled engraving machine according to the requirements of the cross-shaped or Y-shaped periodic structure and the size, cutting the non-conductive part in the central connection-shaped periodic structure, and only leaving the conductive periodic structure part, thereby obtaining the textile which is formed by arranging the central connection-shaped periodic structure units consisting of the conductive area and the gaps and can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies.
In summary, the textile of the invention can be applied to curtains and wall decoration fabrics, and the specific application process is as follows: the textile is cut according to the size of a curtain or the size of a wall ornament, and the aim of ensuring the textile which can play the role of frequency selective permeability is to ensure that at least 10 crisscross or Y-shaped periodic structure units with the side length of D are respectively contained in the warp and weft directions, so that the curtain and the wall ornament which can selectively pass through mobile phone signals and shield other electromagnetic signals are prepared.
The following describes in detail the preparation method of the textile based on the central connection-type periodic structure according to the present invention by means of specific examples, and the experimental methods used in this example are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the examples are all commercially available unless otherwise specified.
Example 1: the common polyester/cotton 50/50 fabric is used as a base material, the warp and weft yarn count is 144dtex multiplied by 144dtex, the warp and weft density is 330 multiplied by 260 pieces per 10cm, and the square meter weight is 210g/m 2 . The cross-shaped periodic structure unit shown in fig. 2 (a) was used, with dimensions d=144 mm, r=70 mm, a=8 mm. According to the structure and the size, the cross-shaped periodic structure units are closely arranged, and a cylinder mould with the size of 92cm multiplied by 150cm is prepared, wherein the conductive part is a slurry leakage part. Conductive silver paste is adopted, and the conductivity is 6.10X10 7 S/m, printing the conductive silver paste on a polyester/cotton substrate through a cylinder mould, and drying at 180 ℃ to obtain the textile with the cross periodic structure, wherein the conductive area and the non-conductive area are printed on the textile. The resonance point of the textile is between 0.9 and 1.0GHz, and the reflection coefficient at the resonance is-32.58 dB, as shown in figure 3. The textile is cut and sewn, and a complete rectangular cutting piece contains 20 crisscross periodic structure units in the warp and weft directions, so that the curtain or wall decorative fabric is prepared and can pass through a mobile phone of 0.9-1.0 GHzCommunication frequency, and cut off other frequency electromagnetic waves.
Example 2: the terylene conductive fabric with copper and nickel plated on the surface is taken as a base, and the conductivity is 4.5 multiplied by 10 4 S/m, warp and weft yarn count of 222dtex, warp and weft density of 486 x 325 pieces/10 cm, gram weight of 190g/m 2 . On a laser cutter, a Y-shaped periodic structure unit shown in fig. 2 (b) is adopted, and the dimension d=164 mm; r=80 mm; a=5 mm. And cutting the conductive fabric according to the size, and leaving the conductive area and the Y-shaped non-conductive area which are communicated with each other to obtain the textile with the conductive area and the non-conductive area arranged in an array. The resonance point of the textile is between 0.9 and 1.0GHz, and the reflection coefficient at the resonance is-11.03 dB, as shown in figure 4. The textile is cut and sewn, and a complete rectangular cutting piece contains 15Y-shaped periodic structure units in the warp and weft directions, so that the curtain or wall decorative fabric is obtained, and electromagnetic waves with other frequencies can be cut off through the communication frequency of a mobile phone of 0.9-1.0 GHz.
Example 3: the nylon fabric with plain weave is taken as a base material, the warp and weft yarns are 389dtex/144f, the warp and weft density is 234 multiplied by 210 per 10cm, and the square meter weight is 197g/m 2 . The cross-shaped periodic structure unit shown in fig. 2 (a) was used, with dimensions d=74 mm, r=36 mm, a=8 mm. The structure is engraved with concave-convex patterns on the press roller of the stamping machine, and the convex parts of the press roller patterns are consistent with the metal areas in the structure. Selecting commercial gilding paper, enabling a carrier film to face upwards, enabling a transfer layer to be clung to a cloth substrate downwards, adopting a round flat ironing and transfer printing process, wherein the heating temperature is 170 ℃ and the pressure is 8kg/cm 2 And (5) hot stamping for 7s. Electroplated layer in gilding paper (conductivity 4X 10) 6 S/m) is transferred onto the textile according to the designed pattern, and the textile printed with the array arrangement of the conductive areas and the non-conductive areas is obtained. The resonance point of the textile is 1.8-2.0 GHz, and the electromagnetic wave reflection coefficient at the resonance is-19.9 dB, as shown in figure 4. The fabric is cut and sewn, and the warp and weft directions of a complete rectangular cutting piece are all provided with 20 crisscross periodic structure units, so that the curtain or wall decorative fabric is prepared, and electromagnetic waves with other frequencies can be cut off through the communication frequency of a mobile phone of 1.8-2.0 GHz.
Example 4: the ultra-fine polyester fabric is used as a base material, the warp and weft yarn count is 83dtex/72f multiplied by 167dtex/144f, the warp and weft density is 234 multiplied by 210 per 10cm, and the square meter weight is 120g/m 2 . The Y-shaped periodic structure unit shown in fig. 2 (b) was used, and the dimensions were d=88 mm, r=42 mm, and a=6 mm. And preparing a mask according to the structure, wherein the conductive parts are hollow. And (3) attaching a mask to the fabric substrate, and performing vacuum magnetron sputtering, wherein in the sputtering process, the part covered by the mask cannot be sputtered with metal, so that the part is a non-conductive area. Adopting a copper target and a nickel target, sputtering the copper target firstly and then sputtering the nickel target, and obtaining a conductive area with the conductivity of 10 5 S/m. Thus, a textile with a Y-shaped periodic structure shown in fig. 1 (b) is obtained, the resonance point of the textile is 1.8-2.0 GHz, and the reflection coefficient at the resonance point is-18.55 dB, as shown in fig. 5. The fabric is cut and sewn, and the warp and weft directions of a complete rectangular cutting piece are all provided with 23Y-shaped periodic structure units, so that the curtain or wall decorative fabric is prepared, and electromagnetic waves with other frequencies can be cut off through mobile phone communication frequency of 1.8-2.0 GHz.
Example 5: the terylene/chinlon blended fabric is used as a base material, the warp and weft yarn count is 83dtex/72f multiplied by 167dtex/144f, the warp and weft density is 234 multiplied by 210 per 10cm, and the square meter weight is 120g/m 2 . The cross-shaped periodic structure unit shown in fig. 2 (a) was used, with dimensions d=60 mm, r=26 mm, a=2 mm. And preparing a mask according to the structure, wherein the conductive parts are hollow. Attaching a mask to a fabric substrate, and performing copper-nickel composite electroless plating to obtain a conductive region with conductivity of 10 4 S/m. In the electroless plating process, the portion covered by the mask is a non-conductive region. Thus, a textile having a cross-shaped periodic structure as shown in FIG. 1 (a) was obtained, which had a resonance point of 2.5GHz and a reflection coefficient at resonance of-12.55 dB, as shown in FIG. 7. The textile is cut and sewn, and the warp and weft directions of a complete rectangular cutting piece are all provided with 33 crisscross periodic structure units, so that the curtain or wall decorative fabric is prepared, and electromagnetic waves with other frequencies can be cut off through the communication frequency of a mobile phone of 2.3-2.6 GHz.
Example 6: the nylon conductive fabric with silver plated on the surface is used as a base, and the conductivity is highIs 3X 10 6 S/m, warp and weft yarn count is 250dtex, warp and weft density is 500 x 300 roots/10 cm, and gram weight is 210g/m2. On a computer engraving machine, adopting a Y-shaped periodic structure unit shown in the figure 2 (b), wherein the dimension D=68mm; r=30 mm; a=4 mm. According to the size, the conductive fabric is cut, and the conductive part and the Y-shaped gaps which are communicated with each other are left, so that the textile with the periodic arrangement of the conductive areas and the non-conductive Y-shaped gaps is obtained. The resonance point of the textile is 2.3GHz, and the reflection coefficient at resonance is-10.88 dB, as shown in figure 8. The textile is cut and sewn, and the warp and weft directions of a complete rectangular cutting piece are all provided with 30Y-shaped periodic structure units, so that the curtain or wall decorative fabric is prepared, and electromagnetic waves with other frequencies can be cut off through the communication frequency of a mobile phone of 2.3-2.6 GHz.
The foregoing embodiments are only for illustrating the present invention, wherein the structures, connection modes, manufacturing processes, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solutions of the present invention should not be excluded from the protection scope of the present invention.
Claims (7)
1. The textile based on the central connection type periodic structure is used for selectively passing mobile phone signals and cutting off electromagnetic waves with other frequencies, and is characterized in that the textile forms a central connection type periodic structure by a conductive area and a non-conductive area; the non-conductive areas are not communicated with each other, and the non-conductive areas adopt cross-shaped center connection non-conductive structures or Y-shaped center connection non-conductive structures, and form cross-shaped periodic structure units or Y-shaped periodic structure units together with the corresponding conductive structures;
each cross-shaped periodic structure unit is a square area with a side length of D, a cross-shaped non-conductive structure is arranged in the square area, the rest part of the square area except for the cross-shaped non-conductive structure is a conductive structure, the arm length of the cross-shaped non-conductive structure is r, the arm width is a, D is 60-144 mm, r is 26-70 mm, and a is 2-8 mm; the cross periodic structure unit arrays are arranged to form a cross periodic structure;
each Y-shaped periodic structure unit is a square area with a side length of D, a Y-shaped non-conductive structure is arranged in the square area, the rest part of the square area except for the Y-shaped non-conductive structure is a conductive structure, the arm length of the Y-shaped non-conductive structure is r, the arm width is a, wherein D is 68-164 mm, r is 30-80 mm, and a is 2-6 mm; the Y-shaped periodic structure units are arranged in an array mode to form a Y-shaped periodic structure;
the conductivity of the conductive region is not less than 10 4 S/m；
The textile can cut off electromagnetic waves of other frequencies through mobile phone communication frequencies of 0.9-1.0 GHz, 1.8-2.0 GHz or 2.3-2.6 GHz.
2. The textile based on a central connection-shaped periodic structure according to claim 1, wherein the conductive areas are transferred, coated or plated with a metal layer of one or more metals selected from the group consisting of silver, copper, zinc, aluminum, iron nickel and copper nickel.
3. The textile based on a central connection-shaped periodic structure according to claim 1, wherein the conductive areas are woven from metal or metallized fiber yarns.
4. The textile based on a central connection-type periodic structure according to claim 1, wherein the non-conductive area is a conventional textile, and the conventional textile is various textiles composed of cotton, hemp, wool or silk; or various textiles composed of terylene, chinlon, acrylic fiber or vinylon; or various textiles composed of UHMWPE, aramid or polyimide; or blends or interweaves of the foregoing types of fibers.
5. A method for preparing a textile product based on a central connection-shaped periodic structure according to any one of claims 1 to 4, characterized in that it comprises the following:
the method comprises the steps of (1) coating a conductive part of a central connection-shaped periodic structure on a non-conductive textile substrate according to the designed central connection-shaped periodic structure and the size requirement by adopting a gilding paper gilding mode, a local chemical plating mode or a magnetron sputtering mode and a conductive pigment printing mode; or cutting the non-conductive part of the central connection type periodic structure according to the designed central connection type periodic structure and the size requirement by adopting a laser cutting and computer carving mode on the conductive textile substrate to obtain the textile with the central connection type periodic structure unit array formed by the conductive area and the non-conductive area, wherein the textile can selectively pass through mobile phone signals and cut off electromagnetic waves with other frequencies.
6. The method for producing a textile based on a central connection type periodic structure according to claim 5, wherein the non-conductive textile substrate has no conductive property, which means various textiles composed of cotton, hemp, wool or silk; or various textiles composed of terylene, chinlon, acrylic fiber and vinylon; or various textiles composed of UHMWPE, aramid or polyimide; or blends or interweaves of the foregoing types of fibers.
7. An application of textile based on a central connection type periodic structure, which is characterized in that when the textile based on any one of claims 1 to 4 is applied to curtains and wall ornaments, the textile is cut according to the size of the curtains or the size of the wall ornaments, so that at least 10 crisscross or Y-shaped periodic structure units are respectively contained in the warp and weft directions, and the curtains and the wall ornaments which can selectively shield other electromagnetic signals through mobile phone signals are prepared.
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| CN109137464A (en) * | 2018-07-17 | 2019-01-04 | 上海工程技术大学 | A kind of water-fastness compound cotton fabric of graphene/silver of conduction and preparation method thereof |
| CN109137480A (en) * | 2018-07-17 | 2019-01-04 | 上海工程技术大学 | A kind of water-fastness compound cotton fabric of conductive graphene/silver and preparation method thereof |
| CN109112820A (en) * | 2018-07-17 | 2019-01-01 | 上海工程技术大学 | A kind of penetrating water-fastness compound cotton fabric of electric polypyrrole/silver and preparation method thereof |
| CN112095351B (en) * | 2020-08-25 | 2021-11-12 | 东华大学 | Frequency band-adjustable integrated multilayer wave-absorbing planar fabric and preparation method thereof |
| CN112952394A (en) * | 2021-02-09 | 2021-06-11 | 中天通信技术有限公司 | Frequency selective surface structure and manufacturing method thereof, and antenna cover and manufacturing method thereof |
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