CN112341783A - Graphene modified polycarbonate composite material and preparation process thereof - Google Patents
Graphene modified polycarbonate composite material and preparation process thereof Download PDFInfo
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- CN112341783A CN112341783A CN202011258689.XA CN202011258689A CN112341783A CN 112341783 A CN112341783 A CN 112341783A CN 202011258689 A CN202011258689 A CN 202011258689A CN 112341783 A CN112341783 A CN 112341783A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/016—Additives defined by their aspect ratio
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses a graphene modified polycarbonate composite material and a preparation process thereof, wherein the graphene modified polycarbonate composite material is mainly prepared from the following raw materials in parts by weight: 100 parts of polycarbonate, 10-12 parts of polystyrene, 10-12 parts of graphene, 10-12 parts of calcium sulfate whisker, 10100.1-0.4 part of antioxidant, 1-4 parts of polytetrafluoroethylene and 1-3 parts of titanate coupling agent. The invention also comprises a preparation process of the graphene modified polycarbonate composite material. According to the invention, the graphene is firstly adopted to modify the calcium sulfate whisker, so that the length-diameter ratio of the calcium sulfate whisker is further improved, the diameter of the calcium sulfate whisker is reduced, and the compatibility and the interface adhesive force of the calcium sulfate whisker and a matrix can be further improved. The graphene modified polycarbonate composite material has good fatigue resistance and low notch sensitivity, and is particularly suitable for manufacturing shell materials and the like.
Description
Technical Field
The invention relates to a polycarbonate composite material and a preparation process thereof, in particular to a graphene modified polycarbonate composite material and a preparation process thereof.
Background
Polycarbonate (PC), which is typically a hard and brittle polymer, has good overall properties, tensile strength, compressive strength, flexural strength, and the like, comparable to polyamide 6 or polyamide 66, and impact strength higher than all aliphatic polyamides and most engineering plastics. However, polycarbonate has poor fatigue resistance and high notch sensitivity, which limits the application of PC.
Disclosure of Invention
The invention provides a graphene modified polycarbonate composite material and a preparation process thereof, and aims to solve the technical problems of good fatigue resistance and low notch sensitivity of the conventional polycarbonate material.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the graphene modified polycarbonate composite material is mainly prepared from the following raw materials in parts by weight: 100 parts of Polycarbonate (PC), 10-12 parts of Polystyrene (PS), 10-12 parts of graphene, 10-12 parts of calcium sulfate whisker, 10100.1-0.4 part of antioxidant, 1-4 parts of Polytetrafluoroethylene (PTFE) and 1-3 parts of titanate coupling agent.
The preferable weight ratio is as follows: 100 parts of Polycarbonate (PC), 11 parts of Polystyrene (PS), 11 parts of graphene, 11 parts of calcium sulfate whisker, 10100.2 parts of antioxidant, 3 parts of Polytetrafluoroethylene (PTFE) and 1 part of titanate coupling agent.
The preparation process of the graphene modified polycarbonate composite material comprises the following steps:
(1) adding the calcium sulfate whisker, the titanate coupling agent and half of the graphene into a high-speed mixer, and performing activation treatment for 10-20 min to obtain a modified calcium sulfate whisker; the length-diameter ratio of the modified calcium sulfate whisker is 25-30, and the diameter is 0.2-0.4 micrometer;
(2) adding the polycarbonate, the polystyrene, the other half amount of graphene, the antioxidant 1010 and the polytetrafluoroethylene into a high-speed mixer, and mixing for 6-8 min to obtain a mixture of the polycarbonate, the polystyrene, the graphene, the antioxidant 1010, the polytetrafluoroethylene and the modified calcium sulfate whisker;
(3) and (3) melting and granulating the mixture obtained in the step (2) through a double-screw extruder, wherein the temperature of a machine barrel is 220-230 ℃, and the rotating speed of a screw is 180-200 r/min.
Graphene (Graphene) is sp2The hybridized and connected carbon atoms are tightly packed into a new material with a single-layer two-dimensional honeycomb lattice structure. The graphene has excellent optical, electrical and mechanical properties, has important application prospects in the aspects of materials science, micro-nano processing, energy, biomedicine, drug delivery and the like, and is considered to be a revolutionary material in the future. In the prior art, much research is carried out on graphene, but no report of modifying calcium sulfate whiskers by using graphene is found.
Graphene is one of the materials with the highest known strength, has good toughness and can be bent, the theoretical Young modulus of the graphene reaches 1.0TPa, and the inherent tensile strength is 130 GPa. According to the invention, the calcium sulfate whisker is modified by graphene, and then the polycarbonate modified compound is obtained by the joint activation of the graphene and the calcium sulfate whisker, and the mechanical property of the polycarbonate modified compound is excellent.
Calcium sulfate whiskers, also known as gypsum whiskers, are fibrous single crystals of calcium sulfate. Researches show that the calcium sulfate whisker used in the invention has a more uniform cross section and a complete internal structure after being modified by graphene, and has extremely high strength and fine size, so that the calcium sulfate whisker is easy to adhere to a PC interface, the compatibility with a matrix and the interface adhesive force are improved, and when the calcium sulfate whisker is forced to be oriented by external force, the residual stress in the PC can be well transferred to the calcium sulfate whisker, so that the strength of the PC is improved, the PC has good fatigue resistance, and meanwhile, the notch sensitivity of the PC is greatly reduced.
According to the invention, the graphene is firstly adopted to modify the calcium sulfate whisker, so that the length-diameter ratio of the calcium sulfate whisker is further improved, the diameter of the calcium sulfate whisker is reduced, and the compatibility and the interface adhesive force of the calcium sulfate whisker and a matrix can be further improved.
The graphene modified polycarbonate composite material has good fatigue resistance and low notch sensitivity, and is particularly suitable for manufacturing shell materials and the like.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention is described in further detail below.
Detailed Description
The following examples of the present invention are described in detail, but the present invention can be implemented in many different ways which are defined and covered by the following.
Example 1:
the graphene modified polycarbonate composite material of the embodiment is mainly prepared from the following raw materials in parts by weight: 100 parts of Polycarbonate (PC), 10 parts of Polystyrene (PS), 10 parts of graphene, 10 parts of calcium sulfate whisker, 10100.3 parts of antioxidant, 3 parts of Polytetrafluoroethylene (PTFE) and 3 parts of titanate coupling agent.
The preparation process of the graphene modified polycarbonate composite material comprises the following steps:
(1) adding the calcium sulfate whisker, the titanate coupling agent and half of the graphene into a high-speed mixer, and performing activation treatment for 15min to obtain modified calcium sulfate whisker; the length-diameter ratio of the modified calcium sulfate whisker is 25-30, and the diameter is 0.2-0.4 micrometer;
(2) adding the polycarbonate, the polystyrene, the other half amount of graphene, the antioxidant 1010 and the polytetrafluoroethylene into a high-speed mixer, and mixing for 8min to obtain a mixture of the polycarbonate, the polystyrene, the graphene, the antioxidant 1010, the polytetrafluoroethylene and the modified calcium sulfate whisker;
(3) and (3) melting and granulating the mixture obtained in the step (2) through a double-screw extruder, wherein the barrel temperature is 220 ℃, and the screw rotating speed is 200 r/min.
The mechanical properties of the product of this example were measured according to the ATSM Standard protocol, and the results are shown in Table 1.
Example 2:
the graphene modified polycarbonate composite material is mainly prepared from the following raw materials in parts by weight:
100 parts of Polycarbonate (PC), 11 parts of Polystyrene (PS), 11 parts of graphene, 11 parts of calcium sulfate whisker, 10100.2 parts of antioxidant, 3 parts of Polytetrafluoroethylene (PTFE) and 1 part of titanate coupling agent.
The preparation process of the graphene modified polycarbonate composite material comprises the following steps:
(1) adding the calcium sulfate whisker, the titanate coupling agent and half of the graphene into a high-speed mixer, and performing activation treatment for 20min to obtain modified calcium sulfate whisker; the length-diameter ratio of the modified calcium sulfate whisker is 25-30, and the diameter is 0.2-0.4 micrometer;
(2) adding the polycarbonate, the polystyrene, the other half amount of graphene, the antioxidant 1010 and the polytetrafluoroethylene into a high-speed mixer, and mixing for 8min to obtain a mixture of the polycarbonate, the polystyrene, the graphene, the antioxidant 1010, the polytetrafluoroethylene and the modified calcium sulfate whisker;
(3) and (3) melting and granulating the mixture obtained in the step (2) through a double-screw extruder, wherein the barrel temperature is 220 ℃, and the screw rotating speed is 200 r/min.
The mechanical properties of the product of this example were measured according to the ATSM Standard protocol, and the results are shown in Table 1.
Example 3:
the graphene modified polycarbonate composite material is mainly prepared from the following raw materials in parts by weight: 100 parts of Polycarbonate (PC), 10 parts of Polystyrene (PS), 10 parts of graphene, 12 parts of calcium sulfate whisker, 10100.2 parts of antioxidant, 3 parts of Polytetrafluoroethylene (PTFE) and 1 part of titanate coupling agent.
The preparation process of the graphene modified polycarbonate composite material comprises the following steps:
(1) adding the calcium sulfate whisker, the titanate coupling agent and half of the graphene into a high-speed mixer, and performing activation treatment for 20min to obtain modified calcium sulfate whisker; the length-diameter ratio of the modified calcium sulfate whisker is 25-30, and the diameter is 0.2-0.4 micrometer;
(2) adding the polycarbonate, the polystyrene, the other half amount of graphene, the antioxidant 1010 and the polytetrafluoroethylene into a high-speed mixer, and mixing for 8min to obtain a mixture of the polycarbonate, the polystyrene, the graphene, the antioxidant 1010, the polytetrafluoroethylene and the modified calcium sulfate whisker;
(3) and (3) melting and granulating the mixture obtained in the step (2) through a double-screw extruder, wherein the barrel temperature is 220 ℃, and the screw rotating speed is 200 r/min.
The mechanical properties of the product of this example were measured according to the ATSM Standard protocol, and the results are shown in Table 1.
Comparative example 1
In this comparative example, the procedure and parameter conditions were the same as in example 1 except that graphene was not added.
Comparative example 2
In this comparative example, the procedure and parameter conditions were the same as those in example 2 except that graphene was not added.
Comparative example 3
In this comparative example, the procedure and parameter conditions were the same as those in example 3 except that graphene was not added.
TABLE 1 comparison of mechanical Properties of the products of examples 1-3 (23 ℃ C.)
| Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| Notched impact strength J/m | 109 | 108 | 112 | 67 | 72 | 78 |
| Tensile strength MPa | 115 | 120 | 130 | 80 | 90 | 95 |
| Bending strength MPa | 200 | 210 | 205 | 140 | 135 | 150 |
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The graphene modified polycarbonate composite material is characterized by being mainly prepared from the following raw materials in parts by weight: 100 parts of polycarbonate, 10-12 parts of polystyrene, 10-12 parts of graphene, 10-12 parts of calcium sulfate whisker, 10100.1-0.4 part of antioxidant, 1-4 parts of polytetrafluoroethylene and 1-3 parts of titanate coupling agent.
2. The graphene-modified polycarbonate composite material according to claim 1, which is mainly prepared from the following raw materials in parts by weight: 100 parts of polycarbonate, 11 parts of polystyrene, 11 parts of graphene, 11 parts of calcium sulfate whisker, 10100.2 parts of antioxidant, 3 parts of polytetrafluoroethylene and 1 part of titanate coupling agent.
3. The process for preparing the graphene-modified polycarbonate composite material according to claim 1 or 2, comprising the steps of:
(1) adding the calcium sulfate whisker, the titanate coupling agent and half of the graphene into a high-speed mixer, and performing activation treatment for 10-20 min to obtain a modified calcium sulfate whisker;
(2) adding the polycarbonate, the polystyrene, the other half amount of graphene, the antioxidant 1010 and the polytetrafluoroethylene into a high-speed mixer, and mixing for 6-8 min to obtain a mixture of the polycarbonate, the polystyrene, the graphene, the antioxidant 1010, the polytetrafluoroethylene and the modified calcium sulfate whisker;
(3) and (3) melting and granulating the mixture obtained in the step (2) through a double-screw extruder.
4. The preparation process of the graphene modified polycarbonate composite material according to claim 3, wherein in the step (1), the modified calcium sulfate whisker has an aspect ratio of 25-30 and a diameter of 0.2-0.4 μm.
5. The preparation process of the graphene modified polycarbonate composite material according to claim 3 or 4, wherein in the step (3), the barrel temperature of the melting granulation is 220-230 ℃, and the screw rotation speed is 180-200 rpm.
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| CN202011258689.XA CN112341783A (en) | 2020-11-12 | 2020-11-12 | Graphene modified polycarbonate composite material and preparation process thereof |
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| CN202011258689.XA CN112341783A (en) | 2020-11-12 | 2020-11-12 | Graphene modified polycarbonate composite material and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061050A (en) * | 2021-02-25 | 2021-07-02 | 李婷 | Multifunctional water purification ceramic material and preparation method thereof |
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2020
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113061050A (en) * | 2021-02-25 | 2021-07-02 | 李婷 | Multifunctional water purification ceramic material and preparation method thereof |
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Application publication date: 20210209 |