High-conductivity high-flexibility high-water-washing-resistance fabric based on silver nanowires

[0028] In a preferred embodiment, the method for preparing silver nanowires of the present invention includes the following steps: dispersing polypyrrole, silver salt, and iron salt in ethylene glycol, heating to 100-150°C, and stirring for 2-4h , Centrifugal drying, and then get nano silver wire.

[0029] In a preferred embodiment, the silver salt of the present invention is selected from one or more of silver nitrate, silver fluoride, silver fluoroborate, silver acetate, silver trifluoroacetylacetonate, and silver acetylacetonate.

[0030] In a preferred embodiment, the iron salt of the present invention is selected from one or more of iron sulfate, iron nitrate, and iron chloride.

[0031] In a preferred embodiment, the method for preparing silver nanowires of the present invention includes the following steps: dissolving 1-2g polypyrrole, 0.5-2g silver nitrate, and 0.1-1mg ferric chloride in 100-200g ethylene glycol In the medium, the temperature is raised to 100-150°C, stirred for 2-4h, and centrifuged to dry, to obtain nano silver wires.

[0032] In a more preferred embodiment, the method for preparing silver nanowires of the present invention includes the following steps: dissolving 1.2-1.8 g of polypyrrole, 0.7-1.9 g of silver nitrate, and 0.1-0.9 mg of ferric chloride in 120- In 180g ethylene glycol, the temperature is raised to 110-140°C, stirred for 2.5-3.8h, and centrifuged and dried to obtain nano silver wires.

[0033] In a preferred embodiment, the nano silver wire of the present invention has a length ≥ 10 μm, a diameter ≤ 50 nm, and an aspect ratio ≥ 200.

[0034] In a preferred embodiment, the surface of the nano silver wire of the present invention is covered with polypyrrole, and the thickness of the polypyrrole is 1-2 nm.

[0035] The invention first obtains the nano silver wire covered with polypyrrole through the composite of nano silver wire and polypyrrole, and then uses a simple dipping method to compound with the fabric to obtain a fabric with high conductivity, high flexibility and high washing resistance; The possible reason is that the combination of polypyrrole and nano-silver wire effectively reduces the surface potential energy of nano-silver, slows down the phenomenon of agglomeration between the interfaces of nano-silver wire due to strong interaction, and increases the nano-silver wire’s The possible reason for the stability is that polypyrrole forms a dense network structure on the surface of the silver nanowires, which largely prevents the entry of oxygen and prevents the oxidation of the silver nanowires; in addition, the combination of silver nanowires and polypyrrole The combination effectively improves the dispersion of polypyrrole in the system, so that the composite material can be compounded with the fabric through a simple impregnation method. The mutually reinforcing synergistic effect and special conductivity of the two enhance the conductivity of the composite fabric.

[0036] The inventors unexpectedly discovered through experiments that when the present invention introduces high aspect ratio nano silver wires, especially when the aspect ratio is ≥200 and the thickness of the polypyrrole coating is controlled to be 1-2nm, the composite fabric can have excellent Flexibility and washing resistance; the possible reason is that there is a strong electronic interaction between the silver nanowires with a certain aspect ratio and a certain amount of polypyrrole, which makes it easier for the silver nanowires loaded with polypyrrole to follow the fabric fibers It is arranged radially to fill the gaps between the fabric fibers, each fiber is tightly wrapped by it, and a continuous film layer is formed between the fibers, thereby giving the conductive fabric higher flexibility and washing resistance.

[0037] Fabric

[0038] The fabric of the present invention is a flat flexible sheet block formed by crossing, winding or connecting small and flexible objects.

[0039] In a preferred embodiment, the fabric of the present invention is selected from one or more of cotton fabric, linen fabric, wool fabric, silk fabric, chemical fiber fabric, leather fabric, blended fabric, and modal fabric.

[0040] The cotton fabric of the present invention is also called cotton cloth, which is a fabric woven from cotton yarn. Cotton fabric has become one of the most commonly used fabrics for its excellent wearability, and is widely used in apparel fabrics, decorative fabrics and industrial fabrics.

[0041] As examples of cotton fabrics, plain cloth, fine spun, twill, tribute silk, and velveteen can be cited.

[0042] The main preparation materials of the hemp fabric of the present invention are several soft hemp fibers such as ramie, flax, jute and apocynum.

[0043] As examples of hemp fabrics, ramie cloth, linen cloth, apocynum cloth, and hemp fiber can be cited.

[0044] The silk fabric of the present invention can be divided into silk, tussah silk, rayon and the like. The performance of silk fabric is shiny, soft and smooth, strong tensile force, good elasticity, not easy to wrinkle and fluff, non-conductive, and also has the characteristics of moisture absorption, shrinking and curling in water.

[0045] The chemical fiber fabric of the present invention is a new type of clothing developed in modern times, and has many types. Here mainly refers to the pure spinning, blending or interlaced fabric processed by chemical fiber, that is to say, the fabric woven from purified fiber, excluding the blending and interlaced fabric with natural fiber, the characteristics of chemical fiber fabric are woven into it The characteristics of chemical fiber itself are determined.

[0046] As examples of chemical fiber fabrics, one can cite: regenerated cellulose fiber, strong fiber, polyester, nylon, acrylic, velvet, chlorin, and spandex.

[0047] The regenerated cellulose fiber (cellulose fiber) of the present invention uses natural cellulose (cotton, hemp, bamboo, trees, shrubs, etc.) as raw materials, does not change its chemical structure, but only changes the physical structure of natural cellulose, thereby manufacturing Regenerated cellulose fibers with better performance come out.

[0048] As examples of regenerated cellulose fibers, there can be cited: Tencel, Modal, bamboo fibers, chitin fibers, and cupra fibers.

[0049] The leather in the leather fabric of the present invention is an animal skin that has been denatured and is not perishable obtained by physical and chemical processing such as dehairing and tanning. The leather is composed of natural protein fibers tightly woven in a three-dimensional space. There is a special grain layer on the surface, which has natural grain and luster, and feels comfortable.

[0050] Examples of leather fabrics include genuine leather, recycled leather, artificial leather, and synthetic leather.

[0051] As examples of artificial leather, PVC leather and PU leather can be cited.

[0052] The blended fabric of the present invention is a fabric made by blending two or more different types of fibers into yarns and then woven.

[0053] The modal in the modal fabric of the present invention is a cellulose fiber, which belongs to the same cellulose fiber as rayon, and is a pure rayon fiber.

[0054] Solvent

[0055] The solvent in the present invention refers to a substance that can dissolve solid, liquid or gaseous solutes and then become a solution.

[0056] In a preferred embodiment, the preparation raw material of the present invention further includes a solvent.

[0057] In a preferred embodiment, the boiling point of the solvent of the present invention is 50-90°C.

[0058] In a preferred embodiment, the solvent of the present invention is selected from one or more of ethanol, acetone, ethyl acetate, methyl ethyl ketone, isopropanol, tetrahydrofuran, and hexane.

[0059] The second aspect of the present invention provides a method for preparing a highly conductive, highly flexible, and highly washable fabric based on silver nanowires, which includes the following steps:

[0060] (1) Disperse nano silver wires in a solvent to form a nano silver wire suspension;

[0061] (2) Immerse the fabric in the nano silver wire suspension prepared in step (1) for 1-3 hours, take it out and dry it to obtain.

[0062] In a preferred embodiment, the mass concentration of the nano silver wire suspension is 0.002%-2%.

[0063] In a more preferred embodiment, the mass concentration of the nano silver wire suspension is 0.5%-2%.

[0067] Example 1

[0068] Example 1 provides a highly conductive, highly flexible, and highly washable fabric based on silver nanowires. In parts by weight, the preparation raw materials include 0.2 parts of silver nanowires and 99.8 parts of fabric.

[0069] The preparation raw material also includes a solvent.

[0070] The solvent is acetone.

[0071] The fabric is cotton fabric, purchased from Changshu Tianbin Weaving Co., Ltd., and the article number is IMG-2788.

[0072] The preparation method of the nano silver wire includes the following steps: dissolving 1.5g polypyrrole, 1.6g silver nitrate, 0.5mg ferric chloride in 150g ethylene glycol, heating to 120°C, stirring and reacting for 3h, and centrifugal drying to obtain Nano silver wire.

[0073] The length of the nano silver wire is 60 μm, the diameter is 50 nm, and the aspect ratio is 1200.

[0074] The preparation method of the highly conductive, highly flexible, and highly washable fabric based on silver nanowires includes the following steps:

[0075] (1) Disperse nano silver wires in acetone to form a nano silver wire suspension, the mass concentration of which is 0.005%;

[0076] (2) The cotton fabric is immersed in the nano silver wire suspension for 2 hours, then taken out, and dried at room temperature for 1 hour to obtain the conductive fabric.

[0077] Example 2

[0078] Example 2 provides a highly conductive, highly flexible, and highly washable fabric based on silver nanowires. By weight, the preparation raw materials include 33 parts of silver nanowires and 67 parts of fabric.

[0079] The preparation raw material also includes a solvent.

[0080] The solvent is ethanol.

[0081] The fabric is a cupra fabric, purchased from Shanghai Nengtai Textile Co., Ltd.

[0082] The preparation method of the nano silver wire includes the following steps: dissolving 1.5g polypyrrole, 1.6g silver nitrate, 0.5mg ferric chloride in 150g ethylene glycol, heating to 120°C, stirring and reacting for 3h, and centrifugal drying to obtain Nano silver wire.

[0083] The length of the nano silver wire is 60 μm, the diameter is 50 nm, and the aspect ratio is 1200.

[0084] The preparation method of the highly conductive, highly flexible, and highly washable fabric based on silver nanowires includes the following steps:

[0085] (1) Disperse nano silver wires in acetone to form a nano silver wire suspension with a mass concentration of 0.50%;

[0086] (2) The copper ammonia fabric is immersed in the nano silver wire suspension for 2 hours, then taken out, and dried at room temperature for 1 hour to obtain the conductive fabric.