CN108505187A - A kind of luminous coloration fabric and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of intelligent electronic devices, in particular to a luminous color-changing fabric and a preparation method thereof. The method of the present invention includes: loading a luminescent active material on the flexible fiber conductor to obtain a conductive luminescent active fiber; assembling one or more flexible fiber conductors outside the conductive luminescent active fiber as a counter electrode by winding or paralleling; Externally construct a transparent encapsulation layer or a translucent filter layer or a fluorescent conversion layer to obtain a flexible luminescent fiber that can be used for weaving. Through the selection of luminescent active materials and the selection of filter layers and fluorescent conversion layers, luminescent fibers of various colors can be realized. The construction of luminescent fibers is woven by weaving, knitting and other textile methods to obtain luminous color-changing fabrics. By lighting up fibers of different colors, the overall color change of the fabric is realized, and by further weaving patterns and controlling the design of the circuit, a specific pattern of luminescence is realized.

Description

A kind of light-emitting color-changing fabric and its preparation method

technical field

The invention belongs to the technical field of intelligent electronic devices, and in particular relates to a light-emitting color-changing fabric and a preparation method thereof.

Background technique

As a new generation of electronic devices, wearable devices have attracted extensive attention from the scientific and industrial circles. At present, wearable light-emitting devices are mostly thin-film planar devices, and its planar structure is difficult to adapt to complex deformations such as twisting, collision, scratching or tearing during application, and its airtight structure cannot achieve large-area wearable light-emitting requirements. . The fabric is made of fibers, and the weaving structure makes the fabric have good flexibility, ductility and air permeability. We use fibers as the basic light-emitting unit and weave them to build wearable light-emitting and color-changing devices. Luminescent and color-changing fabrics have a wide range of application values in military and civilian fields.

Contents of the invention

The purpose of the present invention is to provide a luminescent color-changing fabric and a preparation method thereof.

The preparation method of the light-emitting color-changing fabric provided by the present invention, the specific steps are as follows:

(1) Loading a luminescent active layer on the surface of a flexible conductive fiber to obtain a conductive luminescent active fiber;

(2) Assembling conductive luminescent active fibers with conductive fibers;

(3) Wrapping transparent polymer materials on the outer layer of luminous fibers, or transparent polymer materials mixed with dyes and fluorescent conversion materials, as the encapsulation layer;

(4) Weaving the obtained luminescent fiber by traditional weaving method to obtain fabric.

In the step (1) of the present invention, the flexible conductive fiber is selected from: metal wire, natural fiber (such as cotton thread, wool thread, etc.) , nylon, acrylic, vinylon, polyvinyl chloride, spandex, etc.), carbon nanotube fiber, carbon fiber, stainless steel multifilament, metal staple fiber-yarn blended fiber, and metal wire-yarn twisted fiber, etc., fiber diameter 30~200μm .

In the step (1) of the present invention, the luminescent active layer, the luminescent active material is selected from electroluminescent powder, and the electroluminescent powder includes zinc sulfide, cadmium sulfide, calcium sulfide, etc. doped with copper, aluminum, chlorine, and manganese. The transparent insulating polymer is used as a binder, and the luminescent active material is loaded on the surface of the flexible conductive fiber through a dip coating-drying process or a dip coating-ultraviolet crosslinking or a dip coating-thermal curing process, and the thickness of the luminescent active layer is 10-100 μm.

In the step (2) of the present invention, the conductive fiber is used as an electrode, and its material selection range is the same as that of the flexible conductive fiber, and the fiber diameter is 30-100 μm.

In step (3) of the present invention, in the encapsulation layer material, the dyes incorporated include fluorescent yellow, permanent red, indigo, etc., and the fluorescent conversion materials incorporated include inorganic materials (such as nitride phosphor powder, yttrium aluminum doped Garnet phosphor, silicate phosphor, etc.), organic materials (such as coumarin, rhodamine B, rhodamine 6G, etc.), and the final fiber diameter is 100~500μm.

In the step (4) of the present invention, the conventional weaving method, such as weaving, knitting (warp knitting, weft knitting), etc., weaves luminescent fibers, or blends luminescent fibers and yarns to obtain fabrics.

In step (4) of the present invention, the luminescent state of the luminescent fiber can be realized by a portable power supply device such as a dry battery, a lithium battery, a nickel-metal hydride battery and a drive circuit. The portable power supply is fixed on the fabric by sewing or placed in a pocket. The portable power supply The connection with the light-emitting device is connected through a pluggable joint. The electrode of the light-emitting fiber is connected to the power supply through the braided conductive fiber at the edge of the fabric as a current collector. It is realized by energizing or changing the electrical signal, and then realizes the color change of the fabric.

Furthermore, the overall color change of the fabric can be realized by lighting up different colored luminescent fibers; through the design of the weaving pattern and the control circuit, a specific mode of luminescence can be realized.

The luminous brightness of a single luminous fiber can reach up to 157.9cd/m ² , the luminous fiber has excellent flexibility, and the texture of the woven luminous fabric is the same as that of cloth, with excellent flexibility and air permeability, and low power consumption. drive. The brightness of the device remained almost stable after 1000 bending cycles and 10 water washings.

Description of drawings

Fig. 1 is a photo of the light-emitting fiber in the embodiment.

Figure 2 is a photo of the luminescent fabric in the embodiment.

Fig. 3 is the luminance-voltage curve of the light-emitting fiber in the embodiment.

Fig. 4 is the effect of the bending times of the luminescent fabric on the brightness in the embodiment.

Fig. 5 is the effect of the number of times of washing the luminescent fabric on the brightness in the embodiment.

Figure 6 is a photo of the luminescent fabric (enlarged).

Detailed ways

Below in conjunction with specific embodiment, exemplary explanation and help further understand the present invention, but the specific details of embodiment are only in order to illustrate the present invention, do not represent all technical solutions under the present invention's conception, therefore should not be interpreted as the overall technical scheme of the present invention The limitation of the technical solution, some insubstantial additions and changes that do not deviate from the concept of the present invention in the eyes of a skilled person, such as simple replacement or replacement of technical features with the same or similar technical effects, all belong to the protection scope of the present invention.

Example 1

1. Use the dipping-drying method to load the luminescent active layer on the surface of the conductive fiber: mix copper-doped zinc sulfide electroluminescent powder with water-based polyurethane emulsion, the mass ratio of electroluminescent powder to polyurethane is 3:1, and the conductive fiber After passing through the trough containing the mixture, it is dried under the hot air at 150°C. After two coats, the diameter of the finished conductive and luminescent active fiber is about 200 microns;

2. Assemble the counter electrode by winding method: use a winding machine to wind a copper enameled wire with a diameter of 50 microns on the surface of the conductive luminescent active fiber, and the pitch of the copper enameled wire is 0.2 microns;

3. Preparation of the encapsulation layer: the solution dipping-drying method is also used to coat the polyurethane layer crosslinked with aziridine on the surface of the luminescent fiber, and the final diameter of the fiber is about 250 microns;

4. Weaving of luminescent fabric: use a sample knitting machine to blend luminescent fiber and yarn to obtain a luminescent fabric, which is driven by 8 AA batteries to emit light.

In this embodiment, the light-emitting photo of the light-emitting fiber is shown in Figure 1; the light-emitting photo of the light-emitting fabric is shown in Figure 2; the brightness-voltage curve of the light-emitting fiber is shown in Figure 3; the influence of the bending times of the light-emitting fabric on the brightness is shown in Figure 4 ; The impact of the number of washes on the brightness of the luminescent fabric is shown in Figure 5.

Example 2

1. Use the dip coating-ultraviolet curing method to load the luminescent active layer on the surface of the conductive fiber: mix copper-doped zinc sulfide electroluminescent powder with UV-curable polyisoprene liquid rubber, electroluminescent powder and polyisoprene The mass ratio of ethylene rubber is 2:1. The conductive fiber is cured by a high-power ultraviolet lamp after passing through the trough containing the mixture. After one coating, the diameter of the finished conductive and luminescent active fiber is about 200 microns;

2. Assemble the counter electrode by winding method: use a winding machine to wind a copper enameled wire with a diameter of 50 microns on the surface of the conductive luminescent active fiber, and the pitch of the copper enameled wire is 0.2 microns;

3. Preparation of the encapsulation layer: the solution dip-coating-ultraviolet curing method is also used to coat the surface of the luminescent fiber with ultraviolet-cured polyisoprene liquid rubber, and the final diameter of the fiber is about 250 microns;

4. Weaving of luminescent fabrics: use weft knitting machines to blend luminescent fibers and yarns to obtain luminescent fabrics, and use lithium-ion batteries to drive luminescence with a driving circuit.

Example 3

1. Use the dip coating-thermal curing method to load the luminescent active layer on the surface of the conductive fiber: mix the copper-doped zinc sulfide electroluminescent powder with the thermal curing liquid silicone rubber, and the mass ratio of the electroluminescent powder to the liquid silicone rubber is 2: 1. The conductive fiber passes through the trough filled with the mixture and then is cured in an oven at 120°C. After one coat, the diameter of the finished conductive and luminescent active fiber is about 200 microns;

2. Assemble the counter electrode by weaving method: use an improved hose braiding machine to weave a copper enameled wire with a diameter of 50 microns on the surface of the conductive luminescent active fiber;

3. Preparation of the encapsulation layer: the solution dip coating-heat curing method is also used to coat the surface of the luminescent fiber with heat-cured liquid silicone rubber, and the final diameter of the fiber is about 250 microns;

4. Weaving of luminescent fabrics: use weft knitting machines to blend luminescent fibers and yarns to obtain luminescent fabrics, and use lithium-ion batteries to drive luminescence with a driving circuit.

Claims (9)

1. A method for preparing a luminescent color-changing fabric, characterized in that the specific steps are as follows: (1) Loading a luminescent active layer on the surface of a flexible conductive fiber to obtain a conductive luminescent active fiber; (2) Assembling conductive luminescent active fibers with conductive fibers; (3) Wrapping transparent polymer materials on the outer layer of luminous fibers, or transparent polymer materials mixed with dyes and fluorescent conversion materials, as the encapsulation layer; (4) Weaving the obtained luminescent fiber by traditional weaving method to obtain fabric. 2. The preparation method of luminescent color-changing fabric according to claim 1, characterized in that, in step (1), the flexible conductive fiber is selected from: metal wire, metal-plated natural fiber or chemical fiber, carbon nanotube fiber , carbon fiber, stainless steel multifilament, metal staple fiber-yarn blended fiber, and metal wire-yarn twisted fiber, etc., fiber diameter 30~200μm. 3. The preparation method of the luminescent and color-changing fabric according to claim 2, wherein the natural fiber is selected from cotton thread and wool thread; and the chemical fiber is selected from polyester, nylon, acrylic, vinylon, polyvinyl chloride, and spandex. 4. The method for preparing a luminescent color-changing fabric according to any one of claims 1-3, characterized in that, in step (1), the luminescent active layer, wherein the luminescent active material is electroluminescent powder, the electroluminescent Luminescent powders include zinc sulfide, cadmium sulfide, and calcium sulfide doped with copper, aluminum, chlorine, and manganese, and use transparent insulating polymers as binders to achieve luminescent activity through dip-drying process or dip-coating-ultraviolet crosslinking process The material is loaded on the surface of the flexible conductive fiber, and the thickness of the luminescent active layer is 10-100 μm. 5. The preparation method of luminescent and color-changing fabric according to claim 4, characterized in that, in step (2), the conductive fiber is used as an electrode, and its material selection range is the same as that of the flexible conductive fiber, and the fiber diameter is 30-100 μm . 6. The method for preparing luminescent color-changing fabrics according to any one of claims 1-3, 5, characterized in that, in step (3), in the encapsulation layer material, the dyes mixed are selected from fluorescent yellow, permanent Red, indigo, the fluorescent conversion material mixed is selected from inorganic materials and organic materials; the inorganic materials are selected from nitride phosphors, doped yttrium aluminum garnet phosphors, silicate phosphors, and the organic materials are selected from Coumarin, rhodamine B, rhodamine 6G; the final fiber diameter is 100~500μm. 7. The preparation method of luminescent color-changing fabric according to claim 6, characterized in that, in step (4), the traditional weaving method is a weaving or knitting method, weaving luminescent fibers, or combining luminescent fibers and yarns The blend is woven to obtain a fabric. 8. The preparation method of luminous color-changing fabric according to claim 7, characterized in that in step (4), the luminescent state of the luminescent fiber is realized by a dry battery, lithium battery or nickel-metal hydride battery portable power supply device with a drive circuit, The overall color change of the fabric is achieved by lighting up different colored luminescent fibers. 9. The luminous color-changing fabric obtained by the preparation method described in any one of claims 1-8.