阅读说明：本技术 一种基于碳纳米管和石墨烯复合的防静电兼电磁屏蔽织物用水性涂层胶及其制备方法 (Anti-static and electromagnetic shielding fabric aqueous coating adhesive based on compounding of carbon nano tube and graphene and preparation method thereof ) 是由 何文龙 黄钟阳 潘伟超 马宁博 王璟楠 于 2020-05-07 设计创作，主要内容包括：本发明涉及水性涂层胶领域,提供一种基于碳纳米管和石墨烯复合的防静电兼电磁屏蔽织物用水性涂层胶及其制备方法,解决现有技术的涂层胶用在织物上后织物的防静电效果不佳、织物洗涤后防静电性能下降快的缺陷。由以下重量百分比的各原料组成：润湿分散剂0.1～1.0％,消泡剂0.05～0.5％,碳纳米管粉体0.1～1％,石墨烯粉体0.05～1％,PU乳液50～65％,杀菌剂0.1～1％,增稠剂0.1～1％,去离子水余量。(The invention relates to the field of water-based coating adhesives, and provides a carbon nanotube and graphene composite water-based coating adhesive for an anti-static and electromagnetic shielding fabric and a preparation method thereof, which solve the defects of poor anti-static effect of the fabric and rapid reduction of anti-static performance of the fabric after washing after the coating adhesive in the prior art is used on the fabric. The composite material consists of the following raw materials in percentage by weight: 0.1-1.0% of wetting dispersant, 0.05-0.5% of defoaming agent, 0.1-1% of carbon nano tube powder, 0.05-1% of graphene powder, 50-65% of PU emulsion, 0.1-1% of bactericide, 0.1-1% of thickening agent and the balance of deionized water.)

1. The utility model provides an antistatic and electromagnetic shielding fabric water-based coating glue based on carbon nanotube and graphene are compound which characterized in that: the composite material consists of the following raw materials in percentage by weight:

2. the carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the wetting dispersant is a mixture of any one or more than two of acrylic block copolymer containing pigment affinity group, phosphate salt solution of high molecular weight copolymer containing pigment affinity group and alkyl ammonium salt solution of acidic polymer mixed in any ratio.

3. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the defoaming agent is a mixture formed by mixing any one or more than two of organic silicon defoaming agent, aliphatic hydrocarbon emulsion, non-silicone organic ester hydrocarbon and hydrophobic particle-containing mineral oil mixture in any ratio.

4. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the carbon nano tube powder has a tube diameter of 7-11 nm and a purity of more than 99.8%.

5. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the number of graphene layers of the graphene powder is 1-10, the diameter of D50 sheets is 4-7 mu m, and the diameter of D90 sheets is 9-11 mu m.

6. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the solid content of the PU emulsion is 58 +/-1%, the pH value is 7.0-9.0, the tensile strength is 20MPa, and the elongation is 700%.

7. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the active component of the bactericide is isothiazolinone, and the appearance of the bactericide is light yellow green transparent liquid.

8. The carbon nanotube and graphene composite-based water-based coating adhesive for the anti-static and electromagnetic shielding fabric according to claim 1, wherein the coating adhesive comprises: the thickener is one of polyurethane thickener or modified polyurea thickener or a mixture of two of the polyurethane thickener and the modified polyurea thickener in any ratio.

9. A preparation method of an aqueous coating adhesive for an anti-static and electromagnetic shielding fabric based on compounding of carbon nanotubes and graphene is characterized by comprising the following steps:

(1) preparing the raw materials according to the weight percentage of the dosage of claim 1;

(2) sequentially adding deionized water, a wetting agent dispersant, a defoaming agent, carbon nanotube powder and graphene powder into a stirring cylinder, grinding the mixture to the fineness of less than 20 microns after the mixture is uniformly dispersed at a high speed, starting low-speed stirring, adding PU emulsion, a bactericide and a thickening agent, and uniformly stirring; and detecting the obtained product, filtering and packaging after the product is qualified.

Technical Field

The invention relates to the field of water-based coating adhesives, in particular to a carbon nanotube and graphene composite water-based coating adhesive for an anti-static and electromagnetic shielding fabric and a preparation method thereof.

Background

Static electricity is caused by contact, and the clothes and the human body as well as the clothes and the clothes are in contact and separated, so that the static electricity is everywhere and untimely in daily life. Static electricity brings some convenience to people's productive life and brings many troubles and even harm. In dry weather conditions in winter, static electricity causes garments, especially synthetic fiber textile garments, to adhere to the body and feel uncomfortable to wear. Static electricity makes textiles susceptible to dust absorption and difficult to decontaminate and destroy clean environments, thereby affecting the production of precision materials, particularly electronic materials, and the operation of precision electronic instruments. More seriously, the static electricity can generate the static electricity discharge phenomenon when the static electricity is accumulated to a certain degree, and in the electronic industry, various precision instruments and electronic components can be punctured and scrapped due to the static electricity discharge; in the industries of explosives, coal mines, petroleum, chemical industry, food and the like, the static discharge is easy to cause flammable and explosive substances to be ignited and exploded, and the vicious accident of huge loss of personnel and property is caused. Therefore, the elimination of fabric electrostatic hazard is an important subject and has very important practical significance.

At present, three production technologies for producing antistatic fabrics are available: firstly, coating and finishing the surface of the fabric; secondly, fiber chemical modification; thirdly, the conductive fiber is embedded and woven. Compared with the latter two methods, the method for coating and finishing the surface of the fabric is simple and practical, but the antistatic performance of the obtained fabric is easy to reduce after the fabric is washed for many times, mainly because the conductive material used in the early period has insufficient conductivity and large addition amount, and the resin dosage is relatively low, so that the adhesive force of the coating adhesive to the fabric is influenced.

The chemical modification method of the fiber is complex in process, the modified fiber is limited by the environment, and when the relative humidity is lower than 40%, the antistatic effect is poor. The method for embedding and weaving the conductive fibers in the fabric is easy to cause breakage of the conductive fibers due to friction or external force in the processing and washing processes, so that the anti-static effect of the fabric is influenced.

Chinese patent application No. 201610747181.3 discloses an anti-sticking gray fabric not easy to generate bacteria and mildew, which comprises an inner fabric layer, and a base fabric layer, a static removing layer and an anti-sticking gray coating layer are sequentially arranged outside the inner fabric layer; each layer is bonded and fixed by aqueous polyurethane glue; the inner layer of the fabric is formed by blending and weaving cotton fibers and bamboo fibers; the base cloth layer is woven by spandex fibers, and the linear density is 1.5 dtex; the antistatic layer comprises warps and wefts, the warps are made of aramid fibers, and the wefts are made of carbon black conductive fibers; the anti-dusting coating is a polyvinylpyrrolidone coating; the back of the inner fabric layer is provided with a lining fabric layer, the lining fabric layer comprises a base fabric layer woven by lace threads, the base fabric layer comprises an inner fabric layer and an outer fabric layer, a nano antibacterial and mildewproof coating layer is arranged between the inner fabric layer and the outer fabric layer, and the outer surface of the outer fabric layer is provided with a Meijia antimicrobial crystal protection shield layer. The antistatic layer comprises warp and weft, the warp is made of aramid fiber, the weft is made of carbon black conductive fiber, and the method for embedding and weaving the conductive fiber has the problems that in the processing and washing processes, the conductive fiber is broken due to friction or external force, the antistatic effect of the fabric is influenced, and the fabric is not soft.

Chinese patent application No. 201610762204.8 is a spider-web-shaped anti-sticking gray fabric, which is characterized in that: the fabric comprises a fabric inner layer (1), wherein a base fabric layer (2), a static removing layer (3) and an anti-dust coating (4) are sequentially arranged outside the fabric inner layer (1); each layer is bonded and fixed by aqueous polyurethane glue; the inner fabric layer (1) is formed by blending and weaving cotton fibers and bamboo fibers; the base cloth layer (2) is woven by spandex fibers, and the linear density is 1.5 dtex; the antistatic layer (3) comprises warps and wefts, wherein the warps are made of aramid fibers, and the wefts are made of carbon black conductive fibers; the anti-dusting coating (4) is a polyvinylpyrrolidone coating; the back of the inner layer in the fabric is provided with a lining fabric layer, the lining fabric layer comprises a plurality of main yarns distributed by a central point, the main yarns are adjacent, secondary yarns are arranged between the main yarns, the secondary yarns are connected with the adjacent main yarns and continuously diffuse outwards from the central point, the fabric main body is woven by the main yarns and the secondary yarns, and the main yarns and the secondary yarns are woven into a spider-web structure. The antistatic effect of this patent is also achieved by embedding conductive filaments, which has the same problems as the above patent.

Disclosure of Invention

Therefore, aiming at the above content, the invention provides the carbon nanotube and graphene composite-based anti-static and electromagnetic shielding aqueous coating adhesive for the fabric and the preparation method thereof, which solve the defects of poor anti-static effect of the fabric and rapid reduction of anti-static performance of the fabric after the coating adhesive in the prior art is used on the fabric.

In order to achieve the purpose, the invention is realized by the following technical scheme: an antistatic and electromagnetic shielding fabric aqueous coating adhesive based on carbon nanotube and graphene composition is composed of the following raw materials in percentage by weight:

the further improvement is that: the wetting dispersant is a mixture of any one or more than two of acrylic block copolymer containing pigment affinity group, phosphate salt solution of high molecular weight copolymer containing pigment affinity group and alkyl ammonium salt solution of acidic polymer mixed in any ratio.

The further improvement is that: the defoaming agent is a mixture formed by mixing any one or more than two of organic silicon defoaming agent, aliphatic hydrocarbon emulsion, non-silicone organic ester hydrocarbon and hydrophobic particle-containing mineral oil mixture in any ratio.

The further improvement is that: the carbon nano tube powder has a tube diameter of 7-11 nm and a purity of more than 99.8%.

The further improvement is that: the number of graphene layers of the graphene powder is 1-10, the sheet diameter (D50) is 4-7 mu m, and the sheet diameter (D90) is 9-11 mu m.

The further improvement is that: the solid content of the PU emulsion is 58 +/-1%, the pH value is 7.0-9.0, the tensile strength is 20MPa, and the elongation is 700%.

The further improvement is that: the active ingredient of the bactericide is isothiazolinone (CIT/MIT), and the appearance of the bactericide is light yellow green transparent liquid.

The further improvement is that: the thickener is one of polyurethane thickener or modified polyurea thickener or a mixture of two of the polyurethane thickener and the modified polyurea thickener in any ratio.

A preparation method of an aqueous coating adhesive for an anti-static and electromagnetic shielding fabric based on compounding of carbon nanotubes and graphene comprises the following steps:

(1) preparing the raw materials according to the weight percentage of the components;

(2) sequentially adding deionized water, a wetting agent dispersant, a defoaming agent, carbon nanotube powder and graphene powder into a stirring cylinder, grinding the mixture to the fineness of less than 20 microns after the mixture is uniformly dispersed at a high speed, starting low-speed stirring, adding PU emulsion, a bactericide and a thickening agent, and uniformly stirring; and detecting the obtained product, filtering and packaging after the product is qualified.

By adopting the technical scheme, the invention has the beneficial effects that: according to the aqueous coating adhesive for the anti-static and electromagnetic shielding fabric based on the compounding of the carbon nano tube and the graphene, the graphene used as a raw material is a two-dimensional flaky carbon material with the best known conductivity, and the carbon nano tube can be regarded as graphene which is curled into a bundle tube shape. The carbon nano tube and the graphene are used in a composite mode, due to the excellent conductivity of the carbon nano tube and the graphene, good conductivity can be obtained only by a small amount of addition, the resin can be used in a relatively sufficient amount, the adhesive force of the coating adhesive to the fabric is greatly improved, and the washing resistance of the fabric is guaranteed. The excellent conductivity of the water-based coating adhesive prepared by compounding the graphene and the carbon nano tube enables the coated fabric to have good electromagnetic shielding performance. Compared with the coating of the traditional fabric, the coating glue of the invention is more resistant to washing.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.