CN-121976404-A - High-performance electromagnetic shielding printing and dyeing fabric and preparation method thereof

Abstract

The invention provides a high-performance electromagnetic shielding printing and dyeing fabric and a preparation method thereof. The preparation method comprises the steps of printing and curing MXene-based electroactive ink on a fabric substrate by adopting a screen printing process, and forming an electromagnetic shielding functional layer on the surface of the fabric substrate, wherein the MXene-based electroactive ink comprises MXene nano-sheets, an adhesive, a thickener and water. The invention utilizes the high conductivity of the MXene nano-sheet to construct a shielding network, the shielding network is fixed on the surface of a fabric substrate by a water-based binder and a thickener in a screen printing mode, the high-efficiency shielding is realized, the inherent comfort and durability of the fabric are realized, the shielding effect of the prepared printing and dyeing fabric reaches more than 30dB, the printing and dyeing fabric is not easy to oxidize, the washing fastness is high, and the air permeability, the moisture permeability and the softness are excellent.

Inventors

• WANG YIFENG
• YAN BIAOBIAO
• ZOU ZHUANYONG
• SUN XUAN
• ZHOU ZHONGHAN

Assignees

• 浙江富润印染有限公司
• 绍兴文理学院

Dates

Publication Date

20260505

Application Date

20260129

Claims (10)

1. 1. A preparation method of high-performance electromagnetic shielding printing and dyeing fabric is characterized in that a silk screen printing process is adopted to print and solidify MXene-based electroactive ink on a fabric substrate, and an electromagnetic shielding functional layer is formed on the surface of the fabric substrate; Wherein the MXene-based electroactive ink comprises MXene nanoplatelets, a binder, a thickener, and water.
2. 2. The method for producing a high performance electromagnetic shielding printed fabric according to claim 1, wherein the MXene nanoplatelets are selected from encapsulated MXene nanoplatelets, wherein the encapsulated treatment agent is selected from tannic acid and/or sodium ascorbate.
3. 3. The method for preparing the high-performance electromagnetic shielding printing and dyeing fabric according to claim 2, wherein the concentration of tannic acid is 2-4 g/L; the concentration of the sodium ascorbate is 1-2 g/L.
4. 4. The method for preparing the high-performance electromagnetic shielding printing and dyeing fabric according to any one of claims 1 to 3, wherein the concentration of the MXene nano-sheets in the MXene-based electroactive ink is 10-15 g/L, the concentration of the adhesive is 1-4 g/L, and the concentration of the thickener is 0.1-0.5 g/L.
5. 5. The method for preparing a high-performance electromagnetic shielding printing and dyeing fabric according to claim 1, wherein the MXene-based electroactive ink further comprises a conductive material, wherein the conductive material is at least one selected from the group consisting of carbon nanotubes, graphene, carbon black and polyaniline.
6. 6. The method for preparing the high-performance electromagnetic shielding printing and dyeing fabric according to claim 5, wherein the addition amount of the conductive material is 5-10 g/L.
7. 7. The method for preparing a high performance electromagnetic shielding printing and dyeing fabric as claimed in claim 1, wherein the MXene-based electroactive ink further comprises silicon nitride nano-sheets.
8. 8. The method for preparing a high-performance electromagnetic shielding printing and dyeing fabric according to claim 7, wherein the addition amount of the silicon nitride nano-sheets is 10-30% of that of the MXene nano-sheets.
9. 9. The method for preparing the high-performance electromagnetic shielding printing and dyeing fabric according to claim 1, wherein the printing and curing times are 3-5.
10. 10. A high-performance electromagnetic shielding printing and dyeing fabric obtained by the preparation method according to any one of claims 1 to 9, which is characterized by comprising a fabric substrate and an MXene-based electromagnetic shielding layer adhered to the surface of the fabric substrate.

Description

High-performance electromagnetic shielding printing and dyeing fabric and preparation method thereof Technical Field The invention relates to the technical field of functional fabrics, in particular to a high-performance electromagnetic shielding printing and dyeing fabric and a preparation method thereof. Background As the first physical barrier of the human body, the textile becomes an ideal substrate for realizing the wearable electromagnetic shielding function by virtue of the inherent characteristics of light weight, flexibility and ventilation. With the popularization of electronic equipment and the increasing complexity of electromagnetic environment, development of electromagnetic shielding fabrics with high-efficiency protection and daily wearing comfort has urgent market demands. Research and development personnel at home and abroad try to endow textiles with electromagnetic shielding functions through various technical routes, but the aspects are still in a core contradiction which is difficult to reconcile when facing practical application, especially when printing and dyeing fabrics with appearance and durability are required. The traditional technical route mainly comprises the following steps: (1) And (3) blending or interweaving metal fibers, namely mixing metal fibers such as stainless steel and copper with textile fibers, and forming a shielding network by utilizing the conductivity of metal. Although the method can obtain the shielding effect, the method inevitably leads to the increase of the rigidity of the fabric, the hard hand feeling plate and poor drapability, seriously sacrifices the softness and ventilation property of the fabric and obviously reduces the wearing comfort; (2) Metal coating processes (e.g., electroless plating, electroplating, vacuum sputtering) deposit a continuous metal layer on the fabric surface. The method has higher shielding effect, but the obtained coating is easy to corrode, has large brittleness, has weak bonding force with the low level of the flexible fabric, is easy to crack and even peel in daily wearing and washing processes, and has poor stability. At the same time, the dense metal layer completely closes the fabric pores, resulting in very poor air permeability. In order to overcome the inherent defects of the metal materials, researchers find that carbon-based materials, high conductive molecules, novel two-dimensional MXene and other materials can be loaded on fabrics in a coating, dipping and other modes, and have remarkable advantages in the aspect of maintaining flexibility. However, there are still problems that firstly, in order to increase the shielding effect, the thickness or density of the coating tends to be increased, which causes that nano materials are easily stacked on the surface of the fabric to block the pore channels of the fabric, and the air permeability and the moisture permeability are obviously reduced, so that contradiction exists between comfort and energy efficiency, secondly, the corrosion problem of the metal coating is reduced by adopting nano carbon materials, but the physical adhesion strength between the coating and the fabric is not high, the interface bonding is not stable enough, the performance is seriously attenuated after mechanical friction and repeated washing, and furthermore, although the MXene material has excellent conductivity, the chemical stability in a water-oxygen environment is poor, so that the service life of the product is short. Therefore, the development of the electromagnetic shielding function which is efficient, stable and durable is significant by optimizing the process and materials on the premise of not damaging the original soft, breathable and moisture-permeable characteristics of the fabric. Disclosure of Invention (One) solving the technical problems Aiming at the defects of the prior art, the invention provides a high-performance electromagnetic shielding printing and dyeing fabric and a preparation method thereof, and solves the problems in the prior art. (II) technical scheme In order to achieve the above purpose, the invention is realized by the following technical scheme: According to a first aspect of the invention, there is provided a method for preparing a high-performance electromagnetic shielding printing and dyeing fabric, wherein a screen printing process is adopted to print and cure MXene-based electroactive ink on a fabric substrate, and an electromagnetic shielding functional layer is formed on the surface of the fabric substrate; Wherein the MXene-based electroactive ink comprises MXene nanoplatelets, a binder, a thickener, and water. The invention utilizes the high conductivity of the MXene nano-sheet to construct a shielding network, and the shielding network is fixed on the surface of a fabric substrate in a screen printing mode through a water-based binder and a thickener, so that the high-efficiency shielding is realized, and the inherent comfort and durability