PVC composite material with antistatic effect and preparation method thereof

Abstract

The invention relates to the technical field of preparation of high polymer materials, and particularly discloses a PVC composite material with an antistatic effect and a preparation method of the PVC composite material. The PVC composite material with the antistatic effect comprises the following raw material components in parts by weight: 80-120 parts of PVC resin; 4-6 parts of a heat stabilizer; 5-10 parts of an antistatic agent; and 10 to 20 parts of graphene. The PVC composite material with the antistatic effect, disclosed by the invention, not only has the antistatic effect, but also has relatively good impact resistance, and has an important application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer material preparation, and particularly relates to a PVC composite material with antistatic function and a preparation method thereof. Background Art

[0002] Polyvinyl chloride (PVC) is a widely used thermoplastic plastic and is widely used in many fields due to its excellent mechanical properties, chemical resistance and low cost. However, PVC materials have some deficiencies in certain applications, especially the problem of static electricity accumulation. Static electricity accumulation not only affects the surface quality and appearance of the material, but may also cause equipment failures, fire risks and impacts on human health.

[0003] When the PVC-based composite material is used as a building and decoration material, especially in environments with extremely high requirements for static electricity control, such as laboratories, electronic component manufacturing workshops, operating rooms, etc., the generation of static electricity may interfere with precision instrument equipment and even pose risks; therefore, developing a PVC composite material with antistatic function has important practical significance and market demand. Summary of the Invention

[0004] In order to overcome at least one of the technical problems existing in the prior art, the present invention provides a PVC composite material with antistatic function and a preparation method thereof.

[0005] The technical solution of the present invention is as follows: The present invention first provides a PVC composite material with antistatic function, which comprises the following raw material components in parts by weight: 80 - 120 parts of PVC resin; 4 - 6 parts of heat stabilizer; 5 - 10 parts of antistatic agent; 10 - 20 parts of graphene.

[0006] The present invention provides a PVC composite material with antistatic function having a brand-new composition; by adding an antistatic agent and graphene with conductive function, the surface resistance of the PVC material can be reduced, so that the PVC material has antistatic function.

[0007] Preferably, the PVC composite material with antistatic function comprises the following raw material components in parts by weight: 90 - 110 parts of PVC resin; 4 - 5 parts of heat stabilizer; 5 - 8 parts of antistatic agent; 10 - 12 parts of graphene.

[0008] Most preferably, the PVC composite material with antistatic function comprises the following raw material components in parts by weight: 95 parts of PVC resin; 4.5 parts of heat stabilizer; 8 parts of antistatic agent; 12 parts of graphene.

[0009] Preferably, the heat stabilizer is zinc stearate.

[0010] Preferably, the antistatic agent is antistatic agent SAS-93.

[0011] Preferably, the graphene is modified graphene; The modified graphene is prepared by the following method: (1) Add graphene into water and ultrasonically disperse it evenly to obtain a graphene dispersion; (2) Add sulfate and carbonate into the graphene dispersion, stir and react for 3-5 h, and then filter to obtain a reaction solid; (3) Heat-treat the reaction solid at 600-900 °C for 3-5 h to obtain the modified graphene.

[0012] The inventors found in the research that adding the modified graphene prepared by the above method into the PVC composite material of the present invention can significantly improve the impact resistance of the PVC composite material compared with adding unmodified graphene.

[0013] Preferably, in step (1), the weight ratio of graphene to water is 1:4-8.

[0014] Most preferably, in step (1), the weight ratio of graphene to water is 1:5.

[0015] Preferably, in step (2), the weight ratio of the graphene dispersion to the metal salt and carbonate is 100:1.5-2.5:2.5-3.5.

[0016] Most preferably, in step (2), the weight ratio of the graphene dispersion to the metal salt and carbonate is 100:2:3.

[0017] Preferably, the sulfate in step (2) is selected from magnesium sulfate or zirconium sulfate.

[0018] Further preferably, the sulfate in step (2) is composed of magnesium sulfate and zirconium sulfate.

[0019] Further preferably, the weight ratio of magnesium sulfate to zirconium sulfate is 1-3:1.

[0020] Most preferably, the weight ratio of magnesium sulfate to zirconium sulfate is 2:1.

[0021] The inventor found in the research that during the preparation of modified graphene, the selection of sulfate is crucial; in step (2), when magnesium sulfate and zirconium sulfate are selected for the modification reaction to prepare modified graphene, compared with the modified graphene prepared by using magnesium sulfate or zirconium sulfate alone for the modification reaction, it can further significantly improve the impact resistance of the PVC composite material; in step (2), when magnesium sulfate and zirconium sulfate are simultaneously selected for the modification reaction to prepare modified graphene, it can synergistically improve the impact resistance of the PVC composite material.

[0022] Preferably, the carbonate is potassium carbonate.

[0023] The present invention also provides a preparation method of the above-mentioned PVC composite material with antistatic effect, which comprises the following steps: After uniformly mixing PVC resin, heat stabilizer, antistatic agent and graphene, the obtained mixture is melt-extruded by a twin-screw extruder to obtain the PVC composite material with antistatic effect.

[0024] Beneficial effects: The present invention provides a PVC composite material with antistatic effect having a brand-new composition; by adding an antistatic agent and graphene with conductive effect, the surface resistance of the PVC material can be reduced, so that the PVC material has antistatic effect. Further, by adding the modified graphene prepared by the method of the present invention to the PVC composite material of the present invention, compared with adding unmodified graphene, it can significantly improve the impact resistance of the PVC composite material; making the prepared PVC composite material also have good impact resistance. Thus, it can be seen that the PVC composite material with antistatic effect of the present invention not only has antistatic effect, but also has good impact resistance, and has important application prospects. Specific embodiments

[0025] The following specific embodiments are used to further explain the present invention, but the embodiments do not limit the present invention in any form.

[0026] In the following embodiments, the PVC resin used is PVC with the brand S-60 of Formosa Plastics Group; the remaining raw materials are all conventional raw materials that can be purchased by those skilled in the art.

[0027] Example 1 Preparation of a PVC composite material with antistatic effect Composition by weight of raw materials: 95 parts of PVC resin; 45 parts of heat stabilizer (zinc stearate); 8 parts of antistatic agent (antistatic agent SAS-93); 12 parts of graphene.

[0028] Preparation method: The PVC resin, heat stabilizer, antistatic agent and graphene are uniformly mixed and then melt-extruded by a twin-screw extruder to obtain the PVC composite material with antistatic effect.

[0029] Preparation of the PVC Composite Material with Antistatic Effect in Example 2 Composition of raw materials by weight: 95 parts of PVC resin; 45 parts of heat stabilizer (zinc stearate); 8 parts of antistatic agent (antistatic agent SAS-93); 12 parts of graphene; The graphene described is modified graphene; The modified graphene is prepared by the following method: (1) Add graphene to water and ultrasonically disperse it evenly to obtain a graphene dispersion; among them, the weight ratio of graphene to water is 1:5; (2) Add sulfate and carbonate to the graphene dispersion, stir and react for 4 h, and then filter to obtain a reaction solid; among them, the weight ratio of the graphene dispersion to the metal salt and carbonate is 100:2:3; the sulfate is magnesium sulfate; the carbonate is potassium carbonate; (3) Heat-treat the reaction solid at 750 °C for 4 h to obtain the modified graphene.

[0030] Preparation method: The PVC resin, heat stabilizer, antistatic agent and graphene are uniformly mixed and then melt-extruded by a twin-screw extruder to obtain the PVC composite material with antistatic effect.

[0031] Preparation of the PVC Composite Material with Antistatic Effect in Example 3 Composition of raw materials by weight: 95 parts of PVC resin; 45 parts of heat stabilizer (zinc stearate); 8 parts of antistatic agent (antistatic agent SAS-93); 12 parts of graphene; The graphene described is modified graphene; The modified graphene is prepared by the following method: (1) Add graphene to water and ultrasonically disperse it evenly to obtain a graphene dispersion; among them, the weight ratio of graphene to water is 1:5; (2) Add sulfate and carbonate to the graphene dispersion, stir and react for 4 h, and then filter to obtain a reaction solid; among them, the weight ratio of the graphene dispersion to the metal salt and carbonate is 100:2:3; the sulfate is zirconium sulfate; the carbonate is potassium carbonate; (3) Heat-treat the reaction solid at 750 °C for 4 h to obtain the modified graphene.

[0032] Preparation method: After uniformly mixing PVC resin, heat stabilizer, antistatic agent and graphene, the antistatic PVC composite material is obtained by melt extrusion through a twin-screw extruder.

[0033] Example 4 Preparation of Antistatic PVC Composite Material Composition by weight of raw materials: 95 parts of PVC resin; 45 parts of heat stabilizer (zinc stearate); 8 parts of antistatic agent (antistatic agent SAS-93); 12 parts of graphene; The graphene described is modified graphene; The modified graphene is prepared by the following method: (1) Add graphene to water and disperse it evenly by ultrasonic to obtain a graphene dispersion; among them, the weight ratio of graphene to water is 1:5; (2) Add sulfate and carbonate to the graphene dispersion, stir and react for 4 h, and then filter to obtain a reaction solid; among them, the weight ratio of the graphene dispersion to the metal salt and carbonate is 100:2:3; the sulfate is composed of magnesium sulfate and zirconium sulfate with a weight ratio of 2:1; the carbonate is potassium carbonate; (3) Heat-treat the reaction solid at 750 °C for 4 h to obtain the modified graphene.

[0034] Preparation method: After uniformly mixing PVC resin, heat stabilizer, antistatic agent and graphene, the antistatic PVC composite material is obtained by melt extrusion through a twin-screw extruder.

[0035] Referring to the method in GB / T 21189-2007, a cantilever beam notched impact tester is used to test the notched impact strength of the antistatic PVC composite materials prepared in Examples 1 to 4; the test results are shown in Table 1.

[0036]

[0037] It can be seen from the experimental results in Table 1 that the notched impact strength of the antistatic PVC composite materials prepared in Examples 2 and 3 is significantly higher than that of the antistatic PVC composite material prepared in Example 1; this shows that: adding the modified graphene prepared by the method described in the present invention to the PVC composite material of the present invention can significantly improve the impact resistance of the PVC composite material compared with adding unmodified graphene.

[0038] It can be seen from the experimental results in Table 1 that the notched impact strength of the antistatic PVC composite material prepared in Example 4 is further significantly higher than that of the antistatic PVC composite materials prepared in Examples 2 and 3; this shows that: in the preparation process of modified graphene, the selection of sulfate is very crucial; in step (2), when magnesium sulfate and zirconium sulfate are selected for the modification reaction to prepare modified graphene, compared with the modified graphene prepared by using magnesium sulfate or zirconium sulfate for the modification reaction, it can further significantly improve the impact resistance of the PVC composite material; in step (2), the modified graphene prepared by simultaneously using magnesium sulfate and zirconium sulfate for the modification reaction can synergistically improve the impact resistance of the PVC composite material.

Claims

1. A PVC composite material with antistatic effect, characterized in that, It comprises the following raw material components in parts by weight: 80 - 120 parts of PVC resin; 4 - 6 parts of heat stabilizer; 5 - 10 parts of antistatic agent; 10 - 20 parts of graphene.

2. The PVC composite material with antistatic effect according to claim 1, characterized in that, It comprises the following raw material components in parts by weight: 90 - 110 parts of PVC resin; 4 - 5 parts of heat stabilizer; 5 - 8 parts of antistatic agent; 10 - 12 parts of graphene.

3. The PVC composite material with antistatic effect according to claim 1, characterized in that, It comprises the following raw material components in parts by weight: 95 parts of PVC resin; 45 parts of heat stabilizer; 8 parts of antistatic agent; 12 parts of graphene.

4. The PVC composite material with antistatic effect according to claim 1, characterized in that, The heat stabilizer is zinc stearate.

5. The PVC composite material with antistatic effect according to claim 1, characterized in that, The antistatic agent is antistatic agent SAS - 93.

6. The PVC composite material with antistatic function according to claim 1, characterized in that, The graphene is modified graphene; The modified graphene is prepared by the following method: (1) Add graphene into water and disperse it evenly by ultrasonic to obtain a graphene dispersion; (2) Add sulfate and carbonate into the graphene dispersion, stir and react for 3 - 5 h, then filter to obtain a reaction solid; (3) Heat - treat the reaction solid at 600 - 900 °C for 3 - 5 h to obtain the modified graphene.

7. The PVC composite material with antistatic effect according to claim 6, characterized in that, In step (1), the weight ratio of graphene to water is 1:4 - 8; Most preferably, in step (1), the weight ratio of graphene to water is 1:

5.

8. The PVC composite material with antistatic effect according to claim 6, characterized in that, In step (2), the weight ratio of the graphene dispersion to the metal salt and the carbonate is 100:1.5 - 2.5:2.5 - 3.5; Most preferably, in step (2), the weight ratio of the graphene dispersion to the metal salt and the carbonate is 100:2:

3.

9. The PVC composite material with antistatic effect according to claim 6, characterized in that, The sulfate in step (2) is selected from magnesium sulfate or zirconium sulfate.

10. The preparation method of the PVC composite material with antistatic effect according to any one of claims 1 to 9, characterized in that, It comprises the following steps: Mix the PVC resin, heat stabilizer, antistatic agent and graphene evenly, and then melt - extrude them through a twin - screw extruder to obtain the antistatic PVC composite material.

Images