阅读说明：本技术 一种石墨/石墨烯/银包玻璃微珠涂层吸波织物的制备方法 (Preparation method of graphite/graphene/silver-coated glass bead coating wave-absorbing fabric ) 是由 刘元军 王翊 赵晓明 于 2020-06-05 设计创作，主要内容包括：本发明公开了一种石墨/石墨烯/银包玻璃微珠涂层吸波织物的制备方法。选取连续玄武岩纤维织物为基布,利用织物涂层法,在其表面整理石墨、石墨烯和银包玻璃微珠。制备步骤为：(1)基布的准备：将合适大小的基布平整固定在涂层机针板架上。(2)涂料的制备：a称量一定量石墨、石墨烯、银包玻璃微珠和聚氨酯树脂。b设定搅拌器低速搅拌树脂,同时缓慢少量加入功能粒子。待全部加入后,再以高速搅拌30min。c测定涂料粘度,若未达规定范围20000mPa·s～40000mPa·s,需少量多次添加增稠剂。(3)涂层织物的制备：设定涂层厚度为0.6mm～2.4mm,在涂层机上对基布进行涂层整理,置于烘箱内,80℃～230℃烘干40min,取出置于室温下固化24h。经测试,该材料具有优良的吸波性能。(The invention discloses a preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric. Selecting a continuous basalt fiber fabric as a base fabric, and finishing graphite, graphene and silver-coated glass beads on the surface of the base fabric by using a fabric coating method. The preparation steps are as follows: (1) preparing base cloth: and flatly fixing the base cloth with proper size on a needle board frame of the coating machine. (2) Preparation of the coating: a, weighing a certain amount of graphite, graphene, silver-coated glass beads and polyurethane resin. b, setting a stirrer to stir the resin at a low speed, and slowly adding a small amount of functional particles. After all the components are added, stirring at high speed for 30 min. c, measuring the viscosity of the coating, and if the viscosity of the coating does not reach the specified range of 20000 mPas-40000 mPas, adding a small amount of the thickening agent for a plurality of times. (3) Preparation of coated fabric: setting the thickness of the coating to be 0.6-2.4 mm, carrying out coating finishing on the base cloth on a coating machine, placing the base cloth in an oven, drying for 40min at 80-230 ℃, taking out and placing at room temperature for curing for 24 h. Tests show that the material has excellent wave-absorbing performance.)

1. A preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric is characterized by comprising the following steps:

(1) preparing base cloth: preparing cloth with proper size according to requirements, flatly fixing the cloth on a needle plate frame of a coating machine, and adjusting the cloth to proper tension.

(2) Preparation of the coating: a weigh a certain amount of functional particles (in this study a mixture of graphite, graphene and silver-coated glass beads) and polyurethane resin. b, holding and fixing the beaker filled with the polyurethane resin on a stirrer, setting the stirrer to operate at low speed (about 600rad/min) for stirring the resin, slowly adding a small amount of functional particles into the resin in the process, and adding a certain amount of thickening agent after the functional particles are completely added to obtain a mixed material. Then, the stirrer was set to operate at a high speed (about 2000rad/min), and the above mixed materials were sufficiently stirred for 30min to ensure uniform mixing. c, measuring the viscosity of the uniformly stirred coating obtained in the step b, and if the viscosity does not reach the specified range of 20000mPa & s-40000 mPa & s, adding a small amount of thickening agent for many times under the low-speed (about 600rad/min) stirring state until the viscosity reaches the standard to obtain the required coating.

(3) Preparation of coated fabric: setting the thickness of the coating to be 0.6-2.4 mm, carrying out coating finishing on the base cloth prepared in the step (1) by the wave-absorbing coating prepared in the step (2) on a coating machine, placing the coated fabric in an oven, drying for 40min at 80-230 ℃, taking out, and placing at room temperature for curing for 24 h.

2. The graphite/graphene/silver-coated glass bead coated wave-absorbing fabric according to claim 1, wherein the base fabric is a continuous basalt fiber fabric.

3. The graphite/graphene/silver-coated glass bead coated wave-absorbing fabric according to claim 1, wherein the content (relative to the mass percentage of polyurethane) of the graphite functional particles is one of 0%, 3.33%, 6.66%, 8%, 10%, 13.33%, 16.66%, 20%, 30% and 40%.

4. The graphite/graphene/silver-coated glass bead coated wave-absorbing fabric according to claim 1, wherein the content (relative to the mass percentage of polyurethane) of the graphene functional particles is one of 0%, 3.33%, 6.66%, 8%, 10%, 13.33%, 16%, 16.66% and 24%.

5. The graphite/graphene/silver-coated glass bead coated wave-absorbing fabric according to claim 1, wherein the content (relative to the mass percentage of polyurethane) of the silver-coated glass bead functional particles is one of 0%, 3.33%, 4%, 6.66%, 8%, 10%, 12%, 13.33%, 16% and 16.66%.

6. The graphite/graphene/silver-coated glass bead coated wave-absorbing fabric prepared by the preparation method of the graphite/graphene/silver-coated glass bead coated wave-absorbing fabric according to any one of claims 1 to 5.

Technical Field

The invention belongs to the technical field of electromagnetic wave-absorbing fabrics, and particularly relates to a preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric.

Background

With the rapid development of electronic science and technology, electromagnetic radiation brings problems of electromagnetic interference, electromagnetic pollution, leakage and the like. The hazard of electromagnetic radiation contamination mainly includes two aspects: interference to machine equipment and negative impact on human health. On the one hand, electromagnetic waves affect the normal operation of large-scale integrated circuits and microcurrent electronic equipment, possibly causing operational obstacles of the electronic equipment. On the other hand, if the electromagnetic wave acts on cells, tissues and organs of the human body for a long time, the problems of inappetence, dizziness, hypodynamia, psychasthenia, immunity reduction and the like can be caused. Therefore, prevention and treatment of electromagnetic radiation is urgent. Electromagnetic pollution, an invisible new pollution, has been negatively affecting human society, and has attracted attention from many countries. Currently, the prevention and control of electromagnetic pollution is incorporated into one of environmental protection projects.

Graphites are layered hexagonal crystals in which the carbon atoms are in sp form²The hybrid mode forms bonds, each layer is composed of countless carbon six-ring, the chemical property is stable, the conductivity is good, and the conductive loss type wave-absorbing material is provided. Graphene is a two-dimensional hexagonal honeycomb crystal composed of a single layer of carbon atoms, the carbon atoms of which are sp²The hybrid mode is bonding, the density is low, the conductivity is good, the chemical property is stable, and the material is dielectric loss type wave-absorbing material. The silver-coated glass bead is a core-shell structure of the silver-coated glass bead, has good conductivity, small mass, low density, wide particle size distribution and low cost, and is widely applied to the filler of conductive and shielding materials.

The continuous basalt fiber fabric is woven by basalt fiber yarns, and has the advantages of excellent mechanical property, high temperature resistance, acid and alkali resistance, low hygroscopicity, good insulativity, excellent heat and sound insulation property, good wave transmission property and the like. The research on finishing the wave-absorbing functional particles to common cellulose fiber fabrics (such as cotton fabrics) or synthetic fiber fabrics (such as polyester fabrics) is more, and the research on finishing the wave-absorbing functional particles to continuous basalt fiber fabrics to prepare the electromagnetic wave-absorbing material is less.

Disclosure of Invention

The invention provides a preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric for solving the technical problems.

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

a preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric comprises the following steps:

(1) preparing base cloth: preparing cloth with proper size according to requirements, flatly fixing the cloth on a needle plate frame of a coating machine, and adjusting the cloth to proper tension.

(2) Preparation of the coating: a weigh a certain amount of functional particles (in this study a mixture of graphite, graphene and silver-coated glass beads) and polyurethane resin. b, holding and fixing the beaker filled with the polyurethane resin on a stirrer, setting the stirrer to operate at low speed (about 600rad/min) for stirring the resin, slowly adding a small amount of functional particles into the resin in the process, and adding a certain amount of thickening agent after the functional particles are completely added to obtain a mixed material. Then, the stirrer was set to operate at a high speed (about 2000rad/min), and the above mixed materials were sufficiently stirred for 30min to ensure uniform mixing. c, measuring the viscosity of the uniformly stirred coating obtained in the step b, and if the viscosity does not reach the specified range of 20000mPa & s-40000 mPa & s, adding a small amount of thickening agent for many times under the low-speed (about 600rad/min) stirring state until the viscosity reaches the standard to obtain the required coating.

(3) Preparation of coated fabric: setting the thickness of the coating to be 0.6-2.4 mm, carrying out coating finishing on the base cloth prepared in the step (1) by the wave-absorbing coating prepared in the step (2) on a coating machine, placing the coated fabric in an oven, drying for 40min at 80-230 ℃, taking out, and placing at room temperature for curing for 24 h.

The base cloth is a continuous basalt fiber fabric.

The content (relative to the mass percent of polyurethane) of the graphite functional particles is one of 0 percent, 3.33 percent, 6.66 percent, 8 percent, 10 percent, 13.33 percent, 16.66 percent, 20 percent, 30 percent and 40 percent.

The content (relative to the mass percent of polyurethane) of the graphene functional particles is one of 0%, 3.33%, 6.66%, 8%, 10%, 13.33%, 16%, 16.66% and 24%.

The content (relative to the mass percent of polyurethane) of the silver-coated glass bead functional particles is one of 0%, 3.33%, 4%, 6.66%, 8%, 10%, 12%, 13.33%, 16% and 16.66%.

The invention has the advantages that:

the wave-absorbing coating with a single functional particle type is difficult to meet the requirement of a wide frequency band and has poor wave-absorbing performance, and three different types of functional particles are compositely coated on the continuous basalt fiber fabric, so that the wave-absorbing coating not only widens the absorption frequency band and enhances the wave-absorbing performance, but also enhances the mechanical property and the chemical stability of the coated fabric, and provides a reference for the development of the fabric of the electromagnetic protective clothing.

Drawings

Fig. 1 is a preparation flow chart of the graphite/graphene/silver-coated glass bead coating wave-absorbing fabric.

Fig. 2 is a graph for detecting the wave absorption performance of the graphite/graphene/silver-coated glass bead coating wave-absorbing fabric prepared in the embodiment.

Detailed Description

The invention provides a preparation method of a graphite/graphene/silver-coated glass bead coating wave-absorbing fabric, and the invention is further explained by combining a specific embodiment.