阅读说明：本技术 一种导电包芯纱及其制备方法 (Conductive core-spun yarn and preparation method thereof ) 是由 贾可 刘玮 周子滢 于 2020-07-21 设计创作，主要内容包括：本发明公开了一种导电包芯纱及其制备方法,所述导电包芯纱,是由碳纳米管薄膜丝束和服用纤维须条共同加捻而得的以碳纳米管薄膜丝束为芯纱、以服用纤维作为包覆纱的导电包芯纱。本发明提供的导电包芯纱,由碳纳米管薄膜丝束和服用纤维须条共同加捻而得,以碳纳米管薄膜丝束为芯纱、以服用纤维作为包覆纱,碳纳米管薄膜丝束被包埋在服用纤维内部,不仅可有效提高碳纳米管在导电包芯纱中的稳定性,还有效提高了导电包芯纱整体的耐水性性和可织造性能。(The invention discloses a conductive core-spun yarn and a preparation method thereof, wherein the conductive core-spun yarn is obtained by twisting a carbon nanotube film tow and a clothing fiber strip together, and the conductive core-spun yarn takes the carbon nanotube film tow as a core yarn and the clothing fiber as a cladding yarn. The conductive core-spun yarn provided by the invention is obtained by twisting the carbon nanotube film tow and the clothing fiber strand together, the carbon nanotube film tow is used as the core yarn, the clothing fiber is used as the cladding yarn, and the carbon nanotube film tow is embedded in the clothing fiber, so that the stability of the carbon nanotube in the conductive core-spun yarn can be effectively improved, and the integral water resistance and the weaving performance of the conductive core-spun yarn are also effectively improved.)

1. An electrically conductive core spun yarn, comprising: the conductive core-spun yarn is obtained by twisting a carbon nano tube film tow and a clothing fiber strand together, wherein the carbon nano tube film tow is used as a core yarn, and the clothing fiber is used as a cladding yarn.

2. An electrically conductive core spun yarn according to claim 1, wherein: the carbon nanotube film tow is a continuous carbon nanotube film, the width of the carbon nanotube film tow is 2-15 mm, the thickness of the carbon nanotube film tow is 2-30 mu m, and the conductivity of the carbon nanotube film tow is 10²～10⁵S/m。

3. An electrically conductive core spun yarn according to claim 1, wherein: the fibers for the clothing are natural fibers, chemical fibers or blended fibers.

4. A method of making the conductive core-spun yarn of claim 1, comprising the operations of:

covering the conductive carbon nanotube film tow on the surface of the fiber strand to be fed into the drafting zone of the spinning equipment, so that the conductive carbon nanotube film tow is twisted together with the fiber strand in the twisting zone under the drafting of the drafting zone.

5. The method of claim 4, wherein: the spinning equipment is a spinning frame.

6. The method of claim 5, wherein: the spinning frame is a spinning frame with a twisting triangular space.

7. The method of claim 4, wherein: the feeding speed of the conductive carbon nano tube film tows in the drafting zone is more than 1 mm/s.

8. The method of claim 4, wherein: the conductive carbon nanotube film tows cover the center position of the surface of the clothing fiber strip or one side position of the surface of the clothing fiber strip.

Technical Field

The invention relates to a core-spun yarn and a preparation method thereof, in particular to a conductive core-spun yarn and a preparation method thereof, and belongs to the technical field of spinning.

Background

In recent years, intelligent textiles, and especially intelligent electronic textiles, have gained increasing attention in the industry and academia. The electronic intelligent textile is a novel textile developed by applying high-tech means such as sensing, communication, artificial intelligence and the like to textile technology based on electronic technology. Conductive yarns are a key material in the design and manufacturing process of smart textiles. At present, most of conductive fibers are metal conductive fibers such as steel wires and silver or blend fibers of the metal conductive fibers and clothing fibers, and the fabrics obtained by the method need to be improved in the aspects of comfort and air permeability.

The carbon nano tube has excellent mechanical, electrical and electrochemical properties, is widely applied to the field of textiles, and can be used for obtaining functional textiles such as electric conduction, strain sensing and the like by utilizing the carbon nano tube modified textile fibers. However, due to the nano-size of carbon nanotubes, it is very challenging to use in practical applications. In the prior art, the modification of the carbon nano tube to the textile fiber is to combine the carbon nano tube dispersion liquid with the textile through the methods of padding, spraying and the like. Because the carbon nano tube is attached to the surface of the textile, the modified textile obtained by the method has poor fastness to washing, and the taking safety needs to be further researched. In addition, the carbon nanotube yarn is a linear macroscopic material which is composed of pure carbon nanotubes and has excellent ordered arrangement performance, has the advantages of high strength, high conductivity and strain sensing performance, but has the diameter of only 10-50 mu m and is very fine, so that the carbon nanotube yarn is low in tensile strength and poor in wear resistance, and cannot be woven.

If the carbon nano tube is used as the core yarn and embedded in the clothing yarn to form the covering yarn, the clothing performance of the yarn can be improved. However, the core yarn is greatly drawn during the preparation process of the core yarn, and the carbon nanotube yarn as the core yarn is broken and discontinuous inside the core yarn, which affects the conductivity of the core yarn.

Disclosure of Invention

In view of the above problems in the prior art, an object of the present invention is to provide an electrically conductive core spun yarn and a method for preparing the same.

In order to achieve the purpose, the invention adopts the following technical scheme:

a conductive core-spun yarn is a conductive core-spun yarn which is obtained by twisting a carbon nano tube film tow and a clothing fiber strip together and takes the carbon nano tube film tow as a core yarn and the clothing fiber as a cladding yarn.

In one embodiment, the carbon nanotube film tow is a continuous carbon nanotube film with a width of 2-15 mm, a thickness of 2-30 μm, and an electrical conductivity of 10²～10⁵S/m。

In one embodiment, the carbon nanotube film tow can be a single-layer carbon nanotube film or a plurality of layers of carbon nanotube films stacked together.

In one embodiment, the carbon nanotube film tow has fineness of 6-50 nm (preferably 10-50 nm) and length-diameter ratio of 500-40000 (preferably 5000-40000).

In one embodiment, the carbon nanotube film tow may be a carbon nanotube film tow having a width of 2 to 15mm extracted from a spinnable array of carbon nanotubes, a carbon nanotube film tow having a width of 2 to 15mm prepared by a floating catalytic vapor deposition method, or a carbon nanotube film tow having a width of more than 15mm prepared by a floating catalytic vapor deposition method and having a width of 2 to 15mm formed by cutting.

In one embodiment, the fibers of the clothing are natural fibers (e.g., cotton fibers), chemical fibers (e.g., polyester fibers), or blend fibers.

In one embodiment, the clothing fiber strand is a clothing fiber roving strand (e.g., cotton fiber roving strand) or a continuous uniform staple fiber strand formed by drawing the clothing fiber roving strand.

A preparation method of the conductive core-spun yarn comprises the following operations:

covering the conductive carbon nanotube film tow on the surface of the fiber strand to be fed into the drafting zone of the spinning equipment, so that the conductive carbon nanotube film tow is twisted together with the fiber strand in the twisting zone under the drafting of the drafting zone.

In one embodiment, the spinning apparatus is a spinning frame.

In one embodiment, the spinning frame is a spinning frame with a twisting triangle, including but not limited to ring spinning frames and compact spinning frames.

In one embodiment, the feeding speed of the conductive carbon nanotube film tows into the drafting zone is more than 1mm/s, preferably 5-15 mm/s.

In one embodiment, the conductive carbon nanotube film tow is covered at a central position of the surface of the clothing fiber strand or at a side position of the surface of the clothing fiber strand.

In one embodiment, the fiber length of the fiber strand for clothing is 30-75 mm, and the fiber fineness is 1.5-2.7 dtex.

In one embodiment, the draft ratio of the spinning equipment is 10-30.

Compared with the prior art, the invention has the beneficial technical effects that:

the conductive core-spun yarn provided by the invention is obtained by twisting the carbon nanotube film tow and the clothing fiber strand together, the carbon nanotube film tow is used as the core yarn, the clothing fiber is used as the cladding yarn, and the carbon nanotube film tow is embedded in the clothing fiber, so that the stability of the carbon nanotube in the conductive core-spun yarn can be effectively improved, and the integral water resistance and the weaving performance of the conductive core-spun yarn are also effectively improved; in addition, data show that the conductive medium (carbon nano tube) in the conductive core-spun yarn is uniform and continuous, the conductive core-spun yarn has better conductive stability, and the conductivity range is 10³～10⁵S/m, the fineness of the conductive covering yarn is 30-50 tex, and the conductive covering yarn has excellent spinnability; in addition, the carbon nano tube film tows are used as core yarns to be added into fiber strands to be twisted for twisting together in the spinning process, the operation is simple, the method is suitable for industrial production, and the method has extremely high practical value and is worthy of wide popularization and application.

Drawings

FIG. 1 is a schematic twisting diagram of a conductive core spun yarn produced by a ring spinning frame in example 1 of the present invention;

FIG. 2 is a schematic twisting diagram of a conductive core spun yarn produced by a compact spinning frame in example 2 of the present invention;

FIG. 3 is a schematic cross-sectional view of an electrically conductive core spun yarn prepared in example 3 of the present invention;

the numbers in the figures are as follows: 1. carbon nanotube film tow; 2. administering fiber; 3. a conductive core spun yarn; 4. a front roller; 5. a carbon nanotube spinnable array; 6. a mesh suction roller; 7. and (4) pressing the rolls.

Detailed Description

The technical solution of the present invention will be further clearly and completely described below with reference to the accompanying drawings and examples.