Carbon nanotube elastic core-spun yarn as well as preparation method and application thereof

Abstract

The invention discloses a carbon nanotube elastic core-spun yarn as well as a preparation method and application thereof. The preparation method comprises the following steps of providing a carbon nanotube spring wire with a spiral structure; providing two twisting roll shafts rotating in the same direction, wherein a selected gap is formed between the two twisting roll shafts, and the rotating direction of each twisting roll shaft is the same as the spiral direction of the spiral structure of the carbon nanotube spring wire; and stretching the carbon nanotube spring wire along the length direction to enable the carbon nanotube spring wire to continuously enter the selected gap, and simultaneously enabling a short fiber flow formed by short fibers to enter the selected gap and be distributed on the surface of the carbon nanotube spring wire to form the carbon nanotube elastic core-spun yarn. The carbon nanotube elastic core-spun yarn comprises the carbon nanotube spring wire serving asa core body and a skin layer completely wrapping the core body, and the skin layer comprises the short fibers. The carbon nanotube elastic core-spun yarn provided by the invention has good mechanicalstrength, the elongation at break of the yarn is improved, the fatigue resistance is improved, and meanwhile, functional complementation of carbon nanotube fibers and the short fibers is achieved.

Description

technical field [0001] The invention relates to a carbon nanotube elastic core-spun yarn and a preparation method thereof, in particular to a composite core-spun yarn made of continuous carbon nanotube (hereinafter abbreviated as CNT) fiber grown by CVD method, natural fiber and chemical chopped fiber The yarn method and its application belong to the technical field of nanocomposite material processing. Background technique [0002] Carbon nanotube (CNT) is a new type of material in the 21st century, with high strength, ultra-light mechanical properties and special thermal and electrical properties. In order to realize engineering applications, the existing technology assembles them into carbon nanotube fibers, which are one-dimensional macroscopic manifestations of carbon nanotubes, generally with a diameter of about 1-10 μm, and the size is still small. In order to further develop and deepen carbon nanotubes The research and application of macroscopic materials need to be...

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Problems solved by technology

[0006] But the aforementioned prior art has some shortcomings in processing and performance, as the processing length of the carbon nanotube spring in the aforementioned method is limited, the primary fiber lengths used during processing are respectively 1-50cm, 2-50cm, 5-50cm, i.e. The longest length of the carbon nanotube spring is 50cm, and the spring cannot be used as a macroscopic material for engineering application; the processing method of the carbon nanotube composite yarn is to prepare the solution by mixing the carbon nanotube powder and other solutions to prepare the composite yarn Either the carbon nanotube array is pulled and twisted to make a core-spun composite yarn of carbon nanotubes and metal fibers. These methods do not involve how to prepare composite yarns from carbon nanotube fibers grown by CVD. It does not involve how to prepare macroscopic and continuous carbon nanotube spring wires, nor does it involve the processing of CNT fibers and short fiber composite yarns

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