Preparation method for composite modification of carbon nano tube and ABS (Acrylonitrile Butadiene Styrene) material

Abstract

The invention relates to the technical field of chemical composite materials, in particular to a preparation method for composite modification of CNTs (carbon nanotubes) and ABS (acrylonitrile butadiene styrene) materials, which comprises the following steps: oscillating CNTs in absolute ethyl alcohol for 20 minutes; adding an initiator BPO (benzoyl peroxide) into the CNTs and continuously oscillating for 30 minutes; placing the oscillated solution in a water bath kettle at 85 DEG C for 1 hour; filtering the CNTs by adopting a filter screen; putting the filtered CNTs into a drying oven at 120 DEG C, and drying for 3 hours; the CNTs, the ABS plastic, the compatilizer and the lubricant are added into a mixing mill to be mixed for 10 min; the modified ABS plastic is prepared from the following components in parts by weight: 1-3 parts of carbon nanotubes, 95-98 parts of ABS plastic, 0.5-2 parts of compatilizer and 0.2-1 part of lubricant, and is extruded and granulated by a twin-screw extruder under the conditions that the temperature is 220 DEG C and the rotating speed is 400-600 r / min, and the modified ABS plastic is obtained. The compatilizer is POE (Polyolefin Elastomer)-g-MAH ( And the lubricant is ethylene bis stearamide. Compared with the traditional ABS plastic, the modified ABS plastic prepared by the method has the advantages that the tensile strength, the impact strength, the surface resistance, the bending property and the like are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical composite materials, in particular to a preparation method for composite modification of carbon nanotubes and ABS materials. Background Art

[0002] ABS plastic combines the properties of three components: A provides chemical and heat resistance, as well as a certain surface hardness; B imparts high elasticity and toughness; and S imparts the processing and molding characteristics of thermoplastics and improves electrical properties. Therefore, ABS plastic is a tough, hard, and rigid material with readily available raw materials, excellent overall performance, low price, and a wide range of applications. ABS plastic is widely used in the manufacturing industries of machinery, electrical equipment, textiles, automobiles, aircraft, ships, and the chemical industry.

[0003] Since their discovery, carbon nanotubes (CNTs) have aroused great interest. CNTs have excellent mechanical properties, good chemical and thermal stability, good electrical properties and microwave absorption properties, and have a unique nano-effect peculiar to their one-dimensional nanostructure, making them ideal reinforcements for polymer materials and able to give them many new functions. However, CNTs have a high surface energy and are prone to agglomeration, making it difficult to achieve uniform and fine dispersion in a polymer matrix. To be used as a reinforcement material, CNTs must be tightly bonded to the polymer matrix so that stress can be effectively transferred to the CNTs. How to evenly disperse CNTs and enhance the interfacial bonding between CNTs and the polymer matrix is ​​an urgent problem that needs to be solved. Coupling agents are an additive that can combine two substances of different properties through chemical or physical effects and are widely used in composite materials.

[0004] To this end, the present invention proposes a preparation method for composite modification of carbon nanotubes and ABS materials to achieve performance improvement of ABS materials. Summary of the Invention

[0005] The purpose of the present invention is to provide a preparation method for composite modification of carbon nanotubes and ABS materials, so as to improve the performance of ABS materials.

[0006] To achieve the above object, the present invention provides the following technical solution: a preparation method for composite modification of carbon nanotubes and ABS material, comprising the following steps:

[0007] S1, CNTs were shaken in anhydrous ethanol for 20 min;

[0008] S2, add initiator BPO into CNTs and continue shaking for 30 min;

[0009] S3. Place the shaken solution in a water bath at 85°C for 1 h.

[0010] S4, filtering the CNTs using a filter;

[0011] S5. Place the filtered CNTs in a 120°C oven and dry for 3 h;

[0012] S6, adding CNTs, ABS plastic, compatibilizer and lubricant into a mixer and mixing for 10 minutes;

[0013] S7. Extrusion and granulation are performed by a twin-screw extruder at 220° C. and a rotation speed of 400-600 r / min to obtain modified ABS plastic.

[0014] The present invention is further configured as follows: the carbon nanotubes are 1-3 parts, the ABS plastic is 95-98 parts, the compatibilizer is 0.5-2 parts, and the lubricant is 0.2-1 parts.

[0015] The present invention is further configured such that the compatibilizer is POE-g-MAH.

[0016] The present invention is further configured such that the lubricant is vinyl bisstearamide.

[0017] The present invention also provides a carbon nanotube and ABS composite material prepared by the method.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention comprises the following steps: shaking CNTs in anhydrous ethanol for 20 minutes, then adding an initiator BPO to the CNTs and continuing to shake for 30 minutes, placing the shaken solution in an 85°C water bath for 1 hour, filtering the CNTs through a filter screen, placing the filtered CNTs in a 120°C oven for drying for 3 hours, then adding the CNTs, ABS plastic, a compatibilizer and a lubricant into a mixer and mixing for 10 minutes, and finally extruding and granulating the modified ABS plastic through a twin-screw extruder at 220°C and a rotation speed of 400-600 r / min to obtain the modified ABS plastic. Compared with traditional ABS plastic, the modified ABS plastic has improved tensile strength, impact strength, surface resistance and bending properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the preparation process of modified ABS plastic in the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] See also Figure 1 , in the figure: This embodiment is a preferred embodiment of the present technical solution, a preparation method of composite modification of carbon nanotubes and ABS materials, comprising the following steps:

[0024] S1, CNTs were shaken in anhydrous ethanol for 20 min;

[0025] S2, adding initiator and cross-linking agent to CNTs and continuing to shake for 30 minutes;

[0026] S3. Place the shaken solution in a water bath at 85°C for 1 h.

[0027] S4, filtering the CNTs using a filter;

[0028] S5. Place the filtered CNTs in a 120°C oven and dry for 3 h;

[0029] S6, adding CNTs, ABS plastic, compatibilizer and lubricant into a mixer and mixing for 10 minutes;

[0030] S7. Extrusion and granulation are performed by a twin-screw extruder at 220° C. and a rotation speed of 400-600 r / min to obtain modified ABS plastic.

[0031] It should be noted that: the carbon nanotubes are 1-3 parts, ABS plastic is 95-98 parts, compatibilizer is 0.5-2 parts, lubricant is 0.2-1 parts, the compatibilizer is POE-g-MAH, the lubricant is vinyl bisstearamide, the initiator is dibenzoyl peroxide, the chemical formula is C 14 H 10 O4.

[0032] When preparing the modified ABS plastic, the surface of the CNTs is first treated, and then the CNTs are mixed with the ABS plastic and extruded to obtain a modified ABS plastic sample. The parameters of the modified ABS plastic sample are tested, such as the tensile strength, impact strength, surface resistance, and bending properties of the modified ABS plastic sample; wherein:

[0033] Tensile strength is tested according to GB / T1040-92 (50 mm / min);

[0034] Impact strength is tested according to GB1697-82;

[0035] Surface resistance is tested according to GB / T1410-2006;

[0036] Bending performance is tested according to GB / T9341-2000 (2mm / min);

[0037] In order to better study the factors affecting the material parameters of the modified ABS plastic, the preparation conditions were changed during the preparation process to obtain multiple samples of modified ABS plastic; for example:

[0038] By adding different types of CNTs, several modified ABS plastic samples were obtained;

[0039] By changing the addition amount of the same type of CNTs, several modified ABS plastic samples were obtained;

[0040] The extrusion temperature of the twin-screw extruder was changed to obtain several modified ABS plastic samples.

[0041] The above samples were tested for parameters respectively to obtain the function diagram of the influence of each variable on the parameters of the modified ABS plastic sample. The modified ABS plastic sample prepared by taking the peak value has the best performance.

[0042] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0043] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A preparation method for composite modification of carbon nanotubes and ABS materials, characterized in that: The following steps are involved: S1, CNTs were shaken in anhydrous ethanol for 20 min; S2, add initiator to CNTs and continue shaking for 30 min; S3. Place the shaken solution in a water bath at 85°C for 1 h. S4, filtering the CNTs using a filter; S5. Place the filtered CNTs in a 120°C oven and dry for 3 h; S6, adding CNTs, ABS plastic, compatibilizer and lubricant into a mixer and mixing for 10 minutes; S7. Extrusion and granulation are performed by a twin-screw extruder at 220° C. and a rotation speed of 400-600 r / min to obtain modified ABS plastic.

2. The preparation method of composite modification of carbon nanotubes and ABS material according to claim 1, characterized in that: The carbon nanotubes are 1-3 parts, the ABS plastics are 95-98 parts, the compatibilizer is 0.5-2 parts, and the lubricant is 0.2-1 parts.

3. The preparation method of composite modification of carbon nanotubes and ABS materials according to claim 1, characterized in that: The compatibilizer is POE-g-MAH.

4. The preparation method of composite modification of carbon nanotubes and ABS materials according to claim 1, characterized in that: The lubricant is vinyl bisstearamide.

5. A carbon nanotube and ABS composite material prepared according to the method of claim 1.

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