CN113969026A

CN113969026A - Antistatic PVC board

Info

Publication number: CN113969026A
Application number: CN202010726763.XA
Authority: CN
Inventors: 李丹丹
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-25
Filing date: 2020-07-25
Publication date: 2022-01-25

Abstract

The invention relates to the technical field of high polymer materials, in particular to an antistatic PVC plate. The PVC plastic plate is easy to rub and generate electricity, is easy to absorb dust and dirt, and generates electrode phenomenon to people in the processing and using processes. Based on the problems, the invention provides an antistatic PVC plate, which adopts modified graphene as an auxiliary antistatic agent component, the modified graphene is sulfur-nitrogen co-doped graphene, nitrogen is introduced into a carbon material, the electronegativity of the carbon material can be changed, carbon atoms around the nitrogen atoms are enabled to have more positive charges, a PVC product is easy to generate negative charges due to friction, the carbon atoms with the positive charges around the nitrogen atoms can neutralize part of electrons, and the introduction of S element enables the graphene to generate more defect structures and active vacancies, so that the conduction speed of accumulated charges in a PVC system to the outside can be increased better, the static electricity can be eliminated by neutralizing the negative charges inside the PVC product, and the antistatic PVC plate has a good application prospect.

Description

Antistatic PVC board

Technical Field

The invention relates to the technical field of high polymer materials, in particular to an antistatic PVC plate.

Background

Static electricity is a charge accumulation phenomenon concentrated on the surface of an insulating material, and is caused by friction, contact or induction, and the charging of the insulating material is local, but the plastic product is charged to cause a series of hazards. Except for the phenomena that the workpiece is easy to absorb dust and dirt, electrodes are generated to people in the processing and using processes, and even serious accidents such as explosion and the like are caused by sparks generated by electrostatic discharge. To solve the antistatic problem of plastics, the insulation resistance of plastic parts can be reduced by adding an antistatic agent. During the friction process of the object, electric charges are generated continuously and are neutralized continuously, and during the neutralization of the electric charges, three paths of volume conduction, surface conduction and radiation to the air are mainly used. Of which surface conduction is dominant because volume conduction depends primarily on surface resistivity. Whereas the volume resistivity of a typical solid is higher than the surface resistivity. The prevention of charging of plastics is mainly governed by the surface resistivity of the polymeric material. If the surface resistance can be reduced and the surface electrical conduction can be improved, the function of preventing static electricity can be achieved. The antistatic agent can accelerate the neutralization of charges generated by plastic friction, and further plays a role in antistatic.

Research shows that the antistatic performance of PVC products can be greatly improved by adding carbon materials into the PVC products, for example, 2mm chopped carbon fibers are mixed into PVC paste to prepare sample sheets by adopting a blade coating method, and the sample sheets are plasticized in an oven to obtain the PVC products, the antistatic performance of the PVC products is greatly improved, and the surface resistance of the PVC products can be reduced to 10⁴Omega magnitude, however, when the PVC product is prepared by calendering, the chopped carbon fibers are broken in a large amount, and the addition of the chopped carbon fibers has no effect on the antistatic performance of the PVC product (Wangbuan, once per cent, research on carbon fiber/polyvinyl chloride blended antistatic material [ J)]Green buildings, 1996,012(004): 149-; for another example, patent CN 105507558A discloses an antistatic PVC plastic floor, which uses modified poly (3, 4-ethylenedioxythiophene) -polystyrene sulfonic acid and graphene containing antistatic agent component to spray on the surface of PVC floor to achieve the effect of improving the antistatic property of PVC product, and the surface resistance of PVC product is reduced to 10⁵Omega magnitude order, and the antistatic performance of the antistatic coating needs to be further improved. Therefore, how to utilize the carbon material to better improve the antistatic performance of the PVC product is a problem worthy of study.

Disclosure of Invention

Aiming at the problems in the prior art, the technical problems to be solved by the invention are as follows: the PVC plate is easy to rub and generate electricity, is easy to absorb dust and dirt, and generates electrode phenomenon to people in the processing and using processes.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides an antistatic PVC plate which comprises the following components in parts by weight:

specifically, the modified graphene is prepared according to the following steps:

dispersing 150mg GO (graphene oxide) in 20mL of deionized water, ultrasonically dispersing uniformly, adding 1mL of formaldehyde, adding 250mg of melamine and 50mg of thiourea, stirring uniformly, placing the mixture in a high-pressure hydrothermal reaction kettle, carrying out hydrothermal reaction at 160 ℃ for 8h, and then placing the obtained product in a vacuum drying oven at 80 ℃ for drying to obtain the modified graphene.

Specifically, the polymerization degree of the PVC is 1000-1200.

Specifically, the phthalate plasticizer is DOP, BBP, DCP, DBP or DMP.

Specifically, the nonionic surfactant is TX-10, OP-10 or OII-10.

Specifically, the fatty alcohol lubricant is paraffin wax, microcrystalline wax, polyethylene wax, oxidized polyethylene wax, stearate or fatty acid composite ester.

The invention has the beneficial effects that:

(1) according to the invention, the modified graphene is added into a PVC plate system, so that the antistatic property of the PVC plate is further improved;

(2) the modified graphene is sulfur-nitrogen co-doped graphene, nitrogen is introduced into a carbon material, the electronegativity of the carbon material can be changed, so that carbon atoms around the nitrogen atoms have more positive charges, a PVC product is easy to generate negative charges due to friction, the carbon atoms around the nitrogen atoms with the positive charges can neutralize part of electrons, and the introduction of S element enables the graphene to generate more defect structures and active vacancies, can better accelerate the conduction speed of accumulated charges in a PVC system to the outside, so as to neutralize the negative charges inside the PVC product and eliminate static electricity; however, the doping amount of the S element cannot be excessive, otherwise, the structure of the graphene is deformed and distorted, and the conduction rate of accumulated electrons in the PVC is reduced to a certain extent, thereby affecting the antistatic effect.

Detailed Description

The present invention will now be described in further detail with reference to examples.

GO adopted by the following examples and comparative examples of the invention is purchased from Qingdao Huagaoyaochene science and technology Co., Ltd;

the polymerization degree of the PVC used in the following examples and comparative examples of the present invention was 1000-1200.

The phthalate plasticizers used in the following examples and comparative examples of the present invention were DOP, BBP, DCP, DBP or DMP.

The nonionic surfactants used in the following examples and comparative examples of the present invention were TX-10, OP-10 or OII-10.

The fatty alcohol-based lubricant used in the following examples and comparative examples of the present invention was paraffin wax, microcrystalline wax, polyethylene wax, oxidized polyethylene wax, stearate, or fatty acid complex ester.

The modified graphene adopted in the following examples and comparative examples of the present invention was prepared according to the following method:

dispersing 150mg GO in 20mL of deionized water, performing ultrasonic dispersion uniformly, adding 1mL of formaldehyde, adding 250mg of melamine and 50mg of thiourea, stirring uniformly, placing the mixture in a high-pressure hydrothermal reaction kettle, performing hydrothermal reaction at 160 ℃ for 8 hours, and then placing the obtained product in a vacuum drying oven at 80 ℃ for drying to obtain the modified graphene.

Example 1

The antistatic PVC board comprises the following components in parts by weight:

example 2

The antistatic PVC board comprises the following components in parts by weight:

example 3

The antistatic PVC board comprises the following components in parts by weight:

comparative example 1 differs from example 3 in that: the modified graphene is prepared according to the following method:

dispersing 150mgGO in 20mL of deionized water, ultrasonically dispersing uniformly, adding 1mL of formaldehyde, adding 300mg of melamine, stirring uniformly, placing the mixture in a high-pressure hydrothermal reaction kettle, carrying out hydrothermal reaction at 160 ℃ for 8h, and then placing the obtained product in a vacuum drying oven at 80 ℃ for drying to obtain the modified graphene.

Comparative example 2 differs from example 3 in that: the modified graphene is prepared according to the following method:

dispersing 150mgGO in 20mL of deionized water, performing ultrasonic dispersion uniformly, adding 1mL of formaldehyde, adding 300mg of thiourea, stirring uniformly, placing the mixture in a high-pressure hydrothermal reaction kettle, performing hydrothermal reaction at 160 ℃ for 8h, and then placing the obtained product in a vacuum drying oven at 80 ℃ for drying to obtain the modified graphene.

Comparative example 3 differs from example 3 in that:

dispersing 150mg GO in 20mL of deionized water, performing ultrasonic dispersion uniformly, adding 1mL of formaldehyde, adding 250mg of melamine and 150mg of thiourea, stirring uniformly, placing the mixture in a high-pressure hydrothermal reaction kettle, performing hydrothermal reaction at 160 ℃ for 8 hours, and then placing the obtained product in a vacuum drying oven at 80 ℃ for drying to obtain the modified graphene.

Comparative example 4 differs from example 3 in that: the weight portion of the modified graphene is 15 portions.

Examples and comparative examples PVC sheets were obtained according to the following method:

weighing the raw materials according to the formula, adding the raw materials into a mixer, uniformly mixing at 40 ℃, open-milling at 150 ℃ in an open mill, pressing into sheets at 180 ℃ in a press, trimming the formed sheets by a trimming and slitting device, drawing the sheets to a shearing machine by a tractor for cutting according to the required specification, and finally preparing the PVC plate.

And (3) performance testing:

the results of the performance test of the PVC sheets prepared in the examples and comparative examples are shown in table 1:

TABLE 1

The data of comparative example 4 in table 1 show that if the modified graphene is added in an excessive amount, the antistatic performance of the PVC article is also reduced because the excessive amount of modified graphene is easily agglomerated.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The antistatic PVC board is characterized by comprising the following components in parts by weight:

2. an antistatic PVC plate as claimed in claim 1, characterized in that: the modified graphene is prepared according to the following steps:

3. An antistatic PVC plate as claimed in claim 1, characterized in that: the polymerization degree of the PVC is 1000-1200.

4. An antistatic PVC plate as claimed in claim 1, characterized in that: the phthalate plasticizer is DOP, BBP, DCP, DBP or DMP.

5. An antistatic PVC plate as claimed in claim 1, characterized in that: the nonionic surfactant is TX-10, OP-10 or OII-10.

6. An antistatic PVC plate as claimed in claim 1, characterized in that: the fatty alcohol lubricant is paraffin, microcrystalline wax, polyethylene wax, oxidized polyethylene wax, stearate or fatty acid composite ester.