CN115746684A - Anti-static high-shielding conductive material for screen film, preparation method of anti-static high-shielding conductive material and screen film - Google Patents
Anti-static high-shielding conductive material for screen film, preparation method of anti-static high-shielding conductive material and screen film Download PDFInfo
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Abstract
The invention provides an anti-static high-shielding conductive material for a screen film, a preparation method of the anti-static high-shielding conductive material and the screen film, and relates to the technical field of screen protection of electronic products. The antistatic high-shielding conductive material applied to the screen film comprises the following raw materials in parts by mass: 40-60 parts of resin, 1.2-1.8 parts of conductive filler, 2-6 parts of polyarylsulfone, 3-5 parts of metal oxide, 0.5-5 parts of dispersant, 0.1-1 part of defoamer and 15-40 parts of solvent. The heat transfer medium can not only contact with the reaction materials of water and oxygen inhibition without reaction, but also has large specific heat and strong heat-conducting property.
Description
Technical Field
The invention relates to the technical field of electronic product screen protection, in particular to an anti-static high-shielding conductive material for a screen film, a preparation method thereof and a screen film.
Background
With the development of science and technology and the deepening of digital life, electronic products have become essential tools in daily life of people, such as computers, mobile phones, tablets, notebooks and the like. The display screen is an important component of electronic products, and people pay more attention to the color problem, the brightness problem and the technical problem of the display screen, but the static problem of the display screen is easily ignored. Static electricity can cause the display screen to malfunction and even damage the display screen, and if the display screen is not subjected to anti-static treatment, the service life of the electronic equipment is easily shortened.
At present, the common processing method for preventing the display screen from static electricity comprises the steps of coating an anti-static coating on the display screen, grounding, pasting an anti-static film on the screen and the like. Among them, the antistatic film is a relatively simple and fast method. Based on the fact that the types of products in the market are single, most of the products only have the function of static electricity prevention, the pain points of EMI interference existing in the display screen are provided by many customers, and therefore how to ensure that the display screen adhesive film can prevent static electricity and resist electromagnetic wave interference is a research focus of adhesive film manufacturers.
Disclosure of Invention
In order to solve the problems that most of the sticking film products for screen protection in the market only have the anti-static effect and cannot enable a display screen to resist the influence of electromagnetic waves, the invention provides an anti-static high-shielding conductive material for a screen sticking film, and the anti-static high-shielding conductive material can be coated on the surface of a screen film base layer to form a conductive coating, so that the screen film has the conductive performance, prevents electrostatic deposition and has the electromagnetic wave shielding efficiency.
The specific scheme is as follows:
an antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 40-60 parts of resin, 1.2-1.8 parts of conductive filler, 2-6 parts of polyarylsulfone, 3-5 parts of metal oxide, 0.5-5 parts of dispersant, 0.1-1 part of defoamer and 15-40 parts of solvent.
In carrying out the above embodiment, preferably, the resin is selected from a polyurethane resin or an epoxy resin.
In implementing the above embodiment, preferably, the conductive filler is selected from one or two of carboxylated fullerene and amino modified fullerene.
In practicing the above embodiments, preferably, the polyarylsulfone has a molecular weight of 5 to 9 ten thousand.
In the implementation of the above embodiment, preferably, the dispersant is selected from one or more of polyoxyethylene ether, polyacrylamide, sodium polyacrylate, polymethacrylic acid, sodium lignosulfonate and methyl cellulose.
In carrying out the above embodiment, preferably, the defoaming agent is selected from silicone or polyethylene glycol.
In implementing the above embodiment, preferably, the metal oxide is one or more of molybdenum trioxide, vanadium pentoxide, and nickel oxide.
In carrying out the above embodiment, preferably, the solvent is selected from water or ethanol.
On the other hand, the preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersing agent and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed solution obtained in the step one and the mixed solution obtained in the step two, stirring, and eliminating bubbles to obtain the antistatic high-shielding conductive material.
In another aspect, the present invention also provides a screen film comprising a base layer and a conductive coating layer; the conductive coating is obtained by coating and drying the anti-static high-shielding conductive material applied to the screen film.
Compared with the prior art, the invention has the following beneficial effects:
1. the antistatic high-shielding conductive material is coated on the surface of a base layer of a screen film to form a shielding layer. The screen film has good conductivity, can effectively prevent the screen from being influenced by static electricity, and has electromagnetic shielding efficiency.
2. The raw material components of the antistatic high-shielding conductive material are added with the conductive filler, and the conductive filler is selected from carboxylated fullerene or amino modified fullerene, so that the material has conductivity, meanwhile, the raw material components are also added with polyarylsulfone, and the reaction of the polyarylsulfone in resin induces phase separation behavior, so that the construction of a resin/conductive filler co-continuous conductive network is induced, the multiple reflection of electromagnetic waves between conductive interfaces is enhanced, and the electromagnetic shielding performance is obviously enhanced.
3. According to the anti-static high-shielding conductive material, the raw material components are added with the metal oxide, so that the conductivity and the light transmittance of the transparent conductive film are improved. Meanwhile, the conductive filler is less in addition amount through the synergistic effect of the conductive filler and the polyarylsulfone, the influence on the light transmittance of the conductive film is weakened, and the improvement of the electromagnetic shielding performance can be ensured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The reagents of the examples and comparative examples are illustrated below:
resin: epoxy resin, chemical industry of Jinan Jiabin;
conductive filler: amino-modified fullerenes, sienna millennium;
polyarylsulfone: plasticizing Suzhou polyester;
dispersing agent: polyoxyethylene ether, denxin ke;
defoaming agent: polysiloxane, chemical industry of denxingda;
metal oxide(s): vanadium pentoxide, denna spring star;
solvent: and (3) ethanol.
It should be noted that the reagents or apparatuses used in the examples are not indicated by the manufacturer, but those not indicated by the specific techniques or conditions described in the literature in the art or by the specifications of the products are all conventional products commercially available.
Example 1
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 40 parts of resin, 1.8 parts of conductive filler, 6 parts of polyarylsulfone, 5 parts of metal oxide, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Example 2
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 60 parts of resin, 1.2 parts of conductive filler, 6 parts of polyarylsulfone, 5 parts of metal oxide, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersing agent and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Example 3
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 60 parts of resin, 1.8 parts of conductive filler, 2 parts of polyarylsulfone, 5 parts of metal oxide, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersing agent and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Example 4
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 60 parts of resin, 1.8 parts of conductive filler, 6 parts of polyarylsulfone, 3 parts of metal oxide, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed solution obtained in the step one and the mixed solution obtained in the step two, stirring, and eliminating bubbles to obtain the antistatic high-shielding conductive material.
Example 5
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 60 parts of resin, 1.8 parts of conductive filler, 6 parts of polyarylsulfone, 5 parts of metal oxide, 0.5 part of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Example 6
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 60 parts of resin, 1.8 parts of conductive filler, 6 parts of polyarylsulfone, 5 parts of metal oxide, 5 parts of dispersant, 0.1 part of defoaming agent and 15 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Comparative example 1
A coating material applied to a screen film comprises the following raw materials in parts by weight: 40 parts of resin, 6 parts of polyarylsulfone, 5 parts of metal oxide, 5 parts of dispersing agent, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
step one, adding metal oxide into a solvent, and oscillating for 1-3min by ultrasonic for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed solution obtained in the step one and the mixed solution obtained in the step two, stirring, and eliminating bubbles to obtain the antistatic high-shielding conductive material.
Comparative example 2
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 40 parts of resin, 1.8 parts of conductive filler, 5 parts of metal oxide, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
Comparative example 3
An antistatic high-shielding conductive material applied to a screen film comprises the following raw materials in parts by mass: 40 parts of resin, 1.8 parts of conductive filler, 6 parts of polyarylsulfone, 5 parts of dispersant, 1 part of defoaming agent and 40 parts of solvent.
The preparation method of the antistatic high-shielding conductive material applied to the screen film comprises the following steps:
adding a conductive filler and a metal oxide into a solvent, and ultrasonically oscillating for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed solution obtained in the step one and the mixed solution obtained in the step two, stirring, and eliminating bubbles to obtain the antistatic high-shielding conductive material.
In order to verify the effect of the antistatic high-shielding conductive material of the present invention, the coatings of examples and comparative examples were designed for each experimental group to perform the following operations:
the preparation of the screen film comprises the steps of unreeling a base material at the unreeling speed of 2-2.5m/min, roll-coating the prepared coating liquid on the surface of the base material film, drying at the drying temperature of 90 ℃ for 5min, curing the dried coating by ultraviolet irradiation at the light quantity of 150mJ/cm < 2 >, and cutting the screen film of 10 multiplied by 10cm for performance test.
The test items include:
light transmittance: measuring the light transmittance using a light transmittance haze meter; > 90%, comparative example 79%
Surface resistance: measuring the surface resistance by using a high resistance meter; power of 6 of 10
Electromagnetic interference shielding test: and (4) performing detection under a 10GHz detection signal according to the GB/T30142-2013 test standard. Greater than 65db.
The results of the performance test are shown in table 1:
TABLE 1
As can be seen from the test results in Table 1, the test results of the test points 1-6 in the examples show that the transmittance of the examples reaches more than 88.6%, the examples have high transmittance, the examples can be used for pasting films on display screens, the display work of the display screens is not influenced, and the maximum surface resistance of the examples is 6.3 multiplied by 10 6 Omega, has excellent electric conductivity, has antistatic ability, and in addition, its shielding performance is greater than 61dBdB, has excellent electromagnetic shield effect.
Comparative example 1 in which the conductive filler was absent from the components, it was found that the surface resistance was increased and the antistatic ability was weak, and that the shielding property was extremely decreased and the anti-electromagnetic interference ability was decreased, as compared with examples 1 to 6.
Comparative example 2, which lacks polyarylsulfone in its composition, was found to have an increased surface resistance, a reduced antistatic ability, a greatly reduced shielding performance, and a reduced ability to resist electromagnetic interference, as compared to examples 1-6.
Combining the test results of comparative example 1 and comparative example 2, it can be found that the material of the present invention has high shielding conductive performance through the synergistic effect of the conductive filler and the polyarylsulfone
Comparative example 3 shows that the light transmittance of the composition of comparative example 3 is degraded due to the absence of the metal oxide, as compared with examples 1 to 6, thereby demonstrating that the metal oxide has an effect of promoting the light transmittance of the example system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The anti-static high-shielding conductive material applied to the screen film is characterized by comprising the following raw materials in parts by mass: 40-60 parts of resin, 1.2-1.8 parts of conductive filler, 2-6 parts of polyarylsulfone, 3-5 parts of metal oxide, 0.5-5 parts of dispersant, 0.1-1 part of defoamer and 15-40 parts of solvent.
2. The antistatic high-shielding conductive material applied to the screen paste as claimed in claim 1, wherein the resin is selected from a polyurethane resin or an epoxy resin.
3. The antistatic high-shielding conductive material applied to the screen pasting film according to claim 1, wherein the conductive filler is selected from one or two of carboxylated fullerene and amino modified fullerene.
4. The antistatic high-shielding conductive material applied to the screen film as claimed in claim 1, wherein the molecular weight of the polyarylsulfone is 5 to 9 ten thousand.
5. The antistatic high-shielding conductive material applied to the screen film as claimed in claim 1, wherein the dispersant is selected from one or more of polyoxyethylene ether, polyacrylamide, sodium polyacrylate, polymethacrylic acid, sodium lignosulfonate and methyl cellulose.
6. The antistatic high-shielding conductive material applied to a screen paste as claimed in claim 1, wherein the antifoaming agent is selected from polysiloxane or polyethylene glycol.
7. The antistatic high-shielding conductive material applied to the screen pasting film according to claim 1, wherein the metal oxide is one or more of molybdenum trioxide, vanadium pentoxide and nickel oxide.
8. The antistatic high-shielding conductive material applied to the screen paste as claimed in claim 1, wherein the solvent is selected from water or ethanol.
9. The method for preparing the antistatic high-shielding conductive material applied to the screen pasting film according to any one of claims 1 to 8, characterized by comprising the following steps:
adding a conductive filler and a metal oxide into a solvent, and performing ultrasonic oscillation for 1-3min for later use;
step two, mixing the resin with polyarylsulfone, a dispersant and a defoaming agent, and stirring and uniformly mixing for later use;
and step three, mixing the mixed liquid obtained in the step one and the mixed liquid obtained in the step two, stirring, and eliminating bubbles to obtain the anti-static high-shielding conductive material.
10. A screen film, comprising a base layer and a conductive coating layer; the conductive coating is obtained by coating and drying the antistatic high-shielding conductive material applied to the screen film according to any one of claims 1 to 8.
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