CN116162323A

CN116162323A - Composite material, preparation method thereof and electronic product shell

Info

Publication number: CN116162323A
Application number: CN202211683672.8A
Authority: CN
Inventors: 董磊; 舒汇琳; 任娜娜; 汪帅
Original assignee: Shenzhen Honghe Innovation Information Technology Co Ltd
Current assignee: Shenzhen Honghe Innovation Information Technology Co Ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-26

Abstract

The application relates to the technical field of high polymer materials, and provides a composite material and a preparation method thereof, wherein the composite material comprises the following components in percentage by weight based on 100% of the total weight of the composite material: 10-15% of first coupling agent modified potassium titanate, 15-20% of second coupling agent modified titanium silicon carbide, 55-70% of acrylonitrile-butadiene-styrene copolymer, 2-5% of antibacterial agent, 4-7% of antioxidant and 3-7% of stabilizer. According to the composite material, the ABS is modified by the potassium titanate modified by the first coupling agent and the titanium silicon carbide modified by the second coupling agent, so that the mechanical properties such as strength and rigidity of the composite material can be greatly improved, and the stability of the composite material can be improved by the components such as the antibacterial agent, the stabilizer and the stabilizer, so that the composite material has excellent mechanical properties due to the synergistic effect of the components, and has wide application prospects in the electronic product industry.

Description

Composite material, preparation method thereof and electronic product shell

Technical Field

The application belongs to the technical field of high polymer materials, and particularly relates to a composite material, a preparation method thereof and an electronic product shell.

Background

The engineering plastic has the excellent comprehensive properties of high rigidity, small creep, high mechanical strength, good heat resistance and the like, not only retains the excellent characteristics of common plastics, but also has heat resistance and mechanical loudness far higher than those of common plastics, can be kept stable for a long time in harsh physical and chemical environments, and can be used as engineering materials in a plurality of application fields instead of metals.

As a common thermoplastic engineering plastic, ABS (Acrylonitrile Butadiene Styrene, acrylonitrile-butadiene-styrene copolymer) plastic has the advantages of high strength, good toughness, good fluidity, easy processing and forming and good dimensional stability. However, ABS plastics have poor comprehensive mechanical properties, especially poor rigidity, which limits their application in many fields, and thus many industries are researching how to develop high-rigidity ABS materials. At present, the mechanical properties of the ABS plastic are improved mainly by adding styrene-butadiene rubber, a monoalkyl vinyl aromatic monomer, unsaturated nitrile, an auxiliary agent and the like, and the rigidity of the ABS plastic is slightly improved although the bending resistance and the tensile strength of the ABS plastic can be improved.

Therefore, there is a need to develop a composite material with high rigidity.

Disclosure of Invention

The purpose of the application is to provide a composite material, a preparation method thereof and an electronic product shell, and aims to solve the problem that the existing composite material is poor in rigidity.

In order to achieve the purposes of the application, the technical scheme adopted by the application is as follows:

in a first aspect, the present application provides a composite material, comprising the following components in weight percent, based on 100% total weight of the composite material:

in a second aspect, the present application provides a method of preparing a composite material, comprising the steps of:

the mass ratio is (10-15): (10-20): (55-70): (2-5): (4-7): (3-7) respectively weighing first coupling agent modified potassium titanate, second coupling agent modified titanium silicon carbide, acrylonitrile-butadiene-styrene copolymer, antibacterial agent, antioxidant and stabilizer;

mixing the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant and the stabilizer to obtain a mixture;

and (3) carrying out melt extrusion granulation on the mixture to obtain the composite material.

In a third aspect, the present application provides an electronic product housing comprised of the composite material provided herein or the composite material made by the manufacturing method provided herein.

Compared with the prior art, the application has the following beneficial effects:

the composite material provided by the first aspect of the application is suitable for an electronic product shell, and is prepared from 10-15% of potassium titanate modified by a first coupling agent, 15-20% of titanium silicon carbide modified by a second coupling agent, 2-5% of an antibacterial agent, 4-7% of an antioxidant, 3-7% of a stabilizer and other components for modifying an acrylonitrile-butadiene-styrene copolymer, wherein the potassium titanate has a slim structure and excellent mechanical properties such as high expansion strength and high elastic modulus, and can play a role of a skeleton when being added into the acrylonitrile-butadiene-styrene copolymer, and the potassium titanate whisker can develop a directional structure to reduce defect formation, so that the tensile strength, bending strength, rigidity and other mechanical properties of the composite material can be improved; the potassium titanate modified by the first coupling agent generates a multi-branched structure, and new functional groups such as carboxyl, hydroxyl and the like are introduced, so that the interface effect of the potassium titanate modified by the first coupling agent and the acrylonitrile-butadiene-styrene copolymer can be enhanced, and the potassium titanate modified by the first coupling agent can be uniformly dispersed in the composite material, so that the mechanical property of the composite material can be further improved; the titanium silicon carbide is used as a layered ceramic material, has high strength and high elastic modulus, has plasticity and workability of a metal material, can further improve the mechanical properties of a composite material when being added into an acrylonitrile-butadiene-styrene copolymer, and can be more uniformly dispersed in the composite material after being modified by a second coupling agent, so that the tensile strength, bending strength, rigidity and other mechanical properties of the composite material can be greatly improved on the premise of not affecting the molding of the composite material; stability can be improved by the synergistic interaction of the components of the antimicrobial agent, the antioxidant, the stabilizer, and the like. The composite material provided by the invention endows the composite material with excellent mechanical properties such as tensile strength, bending strength, rigidity and the like through the mutual synergistic effect of the components, and has wide application prospects in the electronic product industry.

The preparation method of the composite material provided by the second aspect of the application comprises the following steps of: (10-20): (55-70): (2-5): (4-7): the first coupling agent modified potassium titanate salt, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant and the stabilizer of (3-7) are mixed to obtain a mixture, and then the mixture is subjected to melt extrusion granulation to obtain the composite material, wherein the preparation method is simple to operate and is suitable for industrial production and application.

The electronic product shell provided by the third aspect of the application is composed of the composite material with good mechanical properties such as tensile strength, bending strength and rigidity, so that the electronic product shell also has the good characteristics and can meet the application requirements of the electronic product shell.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved by the present application more clear, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In this application, the term "and/or" describes an association relationship of an association object, which means that there may be three relationships, for example, a and/or B may mean: a alone, a and B together, and B alone. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

In the present application, "at least one" means one or more, and "a plurality" means two or more. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, "at least one (individual) of a, b, or c," or "at least one (individual) of a, b, and c," may each represent: a, b, c, a-b (i.e., a and b), a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple, respectively.

It should be understood that, in various embodiments of the present application, the sequence number of each process does not mean that the sequence of execution is sequential, and some or all of the steps may be executed in parallel or sequentially, where the execution sequence of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The weights of the relevant components mentioned in the embodiments of the present application may refer not only to specific contents of the components, but also to the proportional relationship between the weights of the components, and thus, any ratio of the contents of the relevant components according to the embodiments of the present application may be enlarged or reduced within the scope disclosed in the embodiments of the present application. Specifically, the mass described in the specification of the examples of the present application may be a mass unit known in the chemical industry such as μ g, mg, g, kg.

The terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated for distinguishing between objects such as substances from each other. For example, a first XX may also be referred to as a second XX, and similarly, a second XX may also be referred to as a first XX, without departing from the scope of embodiments of the present application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

The first aspect of the embodiment of the application provides a composite material, which comprises the following components in percentage by weight, based on 100% of the total weight of the composite material:

the composite material provided by the embodiment of the application is suitable for an electronic product shell, and is prepared from 10-15% of potassium titanate modified by a first coupling agent, 15-20% of titanium silicon carbide modified by a second coupling agent, 2-5% of an antibacterial agent, 4-7% of an antioxidant, 3-7% of a stabilizer and other components for modifying an acrylonitrile-butadiene-styrene copolymer, wherein the potassium titanate has a slim structure and excellent mechanical properties such as high expansion strength and high elastic modulus, and can play a role of a skeleton when being added into the acrylonitrile-butadiene-styrene copolymer, and the potassium titanate whisker can develop a directional structure to reduce defect formation, so that the tensile strength, bending strength, rigidity and other mechanical properties of the composite material can be improved; the potassium titanate modified by the first coupling agent generates a multi-branched structure, and new functional groups such as carboxyl, hydroxyl and the like are introduced, so that the interface effect of the potassium titanate modified by the first coupling agent and the acrylonitrile-butadiene-styrene copolymer can be enhanced, and the potassium titanate modified by the first coupling agent can be uniformly dispersed in the composite material, so that the mechanical property of the composite material can be further improved; the titanium silicon carbide serving as a layered ceramic material has high strength and high elastic modulus, and has plasticity and workability of a metal material, so that the mechanical properties of the composite material can be further improved when the titanium silicon carbide modified by the second coupling agent is added into an acrylonitrile-butadiene-styrene copolymer, and the titanium silicon carbide modified by the second coupling agent can be more uniformly dispersed in the composite material, so that the mechanical properties such as tensile strength, bending strength and rigidity of the composite material can be greatly improved on the premise of not affecting the molding of the composite material; the stability of the composite material can be improved through the synergistic interaction among the components such as the antibacterial agent, the antioxidant, the stabilizer and the like. The composite material provided by the invention endows the composite material with excellent mechanical properties such as tensile strength, bending strength, rigidity and the like through the mutual synergistic effect of the components, and has wide application prospects in the electronic product industry.

The acrylonitrile-butadiene-styrene copolymer is abbreviated as ABS, hereinafter abbreviated as ABS. In an embodiment, the first coupling agent modified potassium titanate includes a potassium titanate, a silica coating layer coated on the surface of the potassium titanate, and a first coupling agent attached to the outer surface of the silica coating layer. The potassium titanate in the potassium titanate modified by the first coupling agent can be better connected with the first coupling agent through the silicon dioxide coating layer, a multi-branched structure can be formed, and new functional groups such as carboxyl, hydroxyl and the like are introduced into the outermost layer of the potassium titanate, so that the potassium titanate modified by the first coupling agent can have stronger interface effect with ABS, and the potassium titanate modified by the first coupling agent can be more uniformly dispersed in a material system, and therefore, the tensile strength, bending strength, rigidity and other mechanical properties of the composite material can be greatly improved.

In the embodiment, the potassium titanate comprises at least one of potassium hexatitanate and potassium octatitanate, for example, the potassium titanate can be potassium octatitanate, the potassium octatitanate has excellent mechanical properties such as high expansion strength and high elastic modulus, the potassium octatitanate can play a skeleton role when being added into ABS, the surface of the potassium octatitanate is coated with a silicon dioxide coating layer and is connected with a first coupling agent through the silicon dioxide coating layer, the potassium octatitanate modified by the first coupling agent forms a multi-branched structure, and new functional groups such as carboxyl, hydroxyl and the like are introduced into the outermost layer of the potassium octatitanate, so that the potassium octatitanate modified by the first coupling agent has strong interface effect with the ABS, and can be fully and uniformly dispersed in a material system, and therefore, the mechanical properties such as tensile strength, bending strength, rigidity and the like of the composite material can be greatly improved.

In an embodiment, the first coupling agent is selected from silane coupling agents, for example, the silane coupling agent may be selected from a151 (vinyltriethoxysilane), a171 (vinyltrimethoxysilane), a172 (vinyltris (β -methoxyethoxy) silane), and the like.

In an embodiment, the second coupling agent modified titanium silicon carbide comprises titanium silicon carbide nanoparticles and a second coupling agent connected to the surfaces of the titanium silicon carbide nanoparticles, wherein the titanium silicon carbide has the chemical formula of Ti ₃ SiC ₂ . The titanium silicon carbide has the advantages of high strength and high elastic modulus of the layered ceramic material, and meanwhile has the plasticity and the workability of the metal material, the mechanical properties such as tensile strength, bending strength, rigidity and the like of the composite material can be improved by adding the titanium silicon carbide modified titanium silicon carbide composite material to the ABS, a multi-branched structure can be formed on the surface of the titanium silicon carbide nano particles by connecting a second coupling agent to the surface of the titanium silicon carbide nano particles, and new functional groups such as carboxyl and hydroxyl are introduced, so that the titanium silicon carbide modified by the second coupling agent has a very strong interface effect with the ABS, and the titanium silicon carbide modified by the second coupling agent is more easily and fully dispersed uniformly in the ABS, so that the mechanical properties such as tensile strength, bending strength, rigidity and the like of the composite material can be greatly improved on the premise of not affecting the molding of the composite material.

In an embodiment, the second coupling agent is selected from at least one of a silane coupling agent, a titanate coupling agent. For example, the second coupling agent may be selected from silane coupling agents, and specifically may be selected from a151 (vinyltriethoxysilane), a171 (vinyltrimethoxysilane), a172 (vinyltris (β -methoxyethoxy) silane), and the like. The second coupling agent may be selected from titanate coupling agents, and specifically may be selected from neopentyl (diallyl) oxy tridecyl titanate, neopentyl (diallyl) oxy tridecyl) benzenesulfonyl titanate, neopentyl (diallyl) oxy tris (dioctyl) phosphate titanate, isopropyl tris (dioctyl pyrophosphoryl) titanate, and the like.

In an embodiment, the antibacterial agent is selected from at least one of chitosan, chitin, tea polyphenols. For example, the antibacterial agent may be selected from chitosan. The specific antibacterial agents have good antibacterial effects, can endow the composite material with antibacterial property, can inhibit the invasion of microorganisms to the composite material and reduce unnecessary physical or chemical changes, so that the composite material can be further ensured to have good mechanical properties such as tensile strength, bending strength, rigidity and the like through the synergistic effect of the antibacterial agents, the stabilizing agents and the antioxidants.

In an embodiment, the antioxidant is selected from at least one of phenolic antioxidants, aminic antioxidants. For example, the phenolic antioxidant may be selected from the group consisting of antioxidant 1010, antioxidant 1076, antioxidant 3114, and the like. The amine antioxidant can be selected from naphthylamine, diphenylamine, p-phenylenediamine, etc. The specific antioxidants have good antioxidant effect, play an antioxidant role in the processing process of the composite material, so that the composite material can keep the due performance to the maximum extent after processing, and meanwhile, the aging speed of the product can be delayed, so that the composite material can be further ensured to have good mechanical properties such as tensile strength, bending strength, rigidity and the like through the synergistic effect of the antioxidants, the stabilizer and the antibacterial agent.

In an embodiment, the stabilizer is selected from at least one of calcium stearate, calcium ricinoleate, zinc stearate, zinc ricinoleate. The specific stabilizers have good inhibition effect on degradation of the composite material, and can improve the stability of the composite material, so that the composite material can be further ensured to have good mechanical properties such as tensile strength, bending strength, rigidity and the like through the synergistic effect of the stabilizers, the antibacterial agent and the antioxidant.

In a specific embodiment, the composite material comprises 10-15% of the first coupling agent modified potassium octatitanate and/or the first coupling agent modified potassium hexatitanate, 55-70% of the acrylonitrile-butadiene-styrene copolymer, 15-20% of the second coupling agent modified titanium silicon carbide, 2-5% of the antibacterial agent, 4-7% of the antioxidant and 3-7% of the stabilizer.

The composite material provided by the embodiment of the application can be prepared by the following method.

A second aspect of embodiments of the present application provides a method for preparing a composite material, including the following steps:

s01: the mass ratio is (10-15): (10-20): (55-70): (2-5): (4-7): (3-7) respectively weighing first coupling agent modified potassium titanate, second coupling agent modified titanium silicon carbide, acrylonitrile-butadiene-styrene copolymer, antibacterial agent, antioxidant and stabilizer;

s02: mixing the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant and the stabilizer to obtain a mixture;

s03: and (3) carrying out melt extrusion granulation on the mixture to obtain the composite material.

The preparation method of the composite material provided by the embodiment of the application comprises the following steps of: (10-20): (55-70): (2-5): (4-7): the first coupling agent modified potassium titanate salt, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant and the stabilizer of (3-7) are mixed to obtain a mixture, and then the mixture is subjected to melt extrusion granulation to obtain the composite material, wherein the preparation method is simple to operate and is suitable for industrial production and application.

In the step S01, the preparation method of the first coupling agent modified potassium titanate includes: dispersing potassium titanate in water to form a dispersion; dissolving silicate in water to form silicate solution; adding silicate solution and acid solution into the dispersion liquid to carry out silicon-coated treatment to obtain silicon dioxide coated potassium titanate; and mixing the silicon dioxide coated potassium titanate with a solution containing the first coupling agent for first surface modification treatment, and then drying to obtain the first coupling agent modified potassium titanate. Wherein the temperature of the silicon-coated treatment is 85-95 ℃ and the pH value is 9-10. The silicate may be at least one selected from sodium silicate and potassium silicate, and for example, the silicate may be sodium silicate. The method comprises the steps of carrying out silicon coating treatment on potassium titanate through silicate, forming a silicon dioxide coating layer on the surface of the potassium titanate, and carrying out surface modification treatment on the potassium titanate through a first coupling agent, so that the potassium titanate is connected with the first coupling agent through silicon dioxide combined on the surface of the potassium titanate to form a multi-branched structure, and novel functional groups such as carboxyl, hydroxyl and the like are introduced into the outermost layer of the potassium titanate, so that the obtained potassium titanate modified by the first coupling agent has stronger interface effect with ABS, and the potassium titanate modified by the first coupling agent can be more uniformly dispersed in a system, and can greatly improve the tensile strength, bending strength, rigidity and other mechanical properties of the composite material.

In the embodiment, the mass ratio of the potassium titanate salt, the silicate and the first coupling agent is (85-90): (5-10): (2-5).

In an embodiment, the method of preparing the second coupling agent modified titanium silicon carbide comprises: and adding the titanium silicon carbide nano particles into a solution containing a second coupling agent to perform second surface modification treatment to obtain the second coupling agent modified titanium silicon carbide. Wherein the mass ratio of the titanium silicon carbide nano-particles to the second coupling agent is (90:95): (5-10). The surface of the titanium silicon carbide nano particle is modified by the second coupling agent, a multi-branched structure can be formed on the surface of the titanium silicon carbide nano particle, and new functional groups such as carboxyl, hydroxyl and the like are introduced on the surface of the silicon carbide nano particle, so that the modified titanium silicon carbide modified by the second coupling agent has strong interface effect with ABS, and the titanium silicon carbide modified by the second coupling agent is easier to fully and uniformly disperse in the ABS, therefore, the tensile strength, bending strength, rigidity and other mechanical properties of the composite material can be greatly improved on the premise of not affecting the molding of the composite material.

In the embodiments, reference may be made to the antibacterial agent, the antioxidant and the stabilizer in the above embodiments, and for the sake of brevity, details are not repeated here.

In the above step S02, the step of mixing the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant, and the stabilizer comprises: the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide and the acrylonitrile-butadiene-styrene copolymer are placed into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min to be mixed for 2-3 h, and then the antibacterial agent, the antioxidant and the stabilizer are added to be mixed uniformly.

In the step S03, the step of melt-extruding and granulating the mixture includes: and (3) carrying out melt extrusion granulation on the mixture by a double-screw extruder under the conditions that the working temperature is 180-245 ℃ and the rotating speed of the double screw is 250-350 rpm, so as to obtain the composite material.

In the embodiment, the working temperature from a feed inlet to a head outlet in a main machine barrel of the double-screw extruder is divided into ten sections of control from 190-210 ℃, 200-220 ℃, 200-210 ℃ and 200-220 ℃, and the temperature in the main machine barrel of the double-screw extruder is controlled in a sectional manner, so that all raw material components are heated uniformly in all parts and stages in the feed barrel, and all raw material components are mixed more uniformly. In a specific embodiment, the working temperature from the feed inlet to the head outlet in the main barrel of the twin-screw extruder is controlled in ten stages of 200 ℃, 210 ℃, 205 ℃ and 210 ℃.

A third aspect of embodiments of the present application provides an electronic product housing, which is composed of the composite material provided herein or the composite material manufactured by the manufacturing method provided herein.

The electronic product shell material provided by the embodiment of the application is composed of the composite material with good mechanical properties such as tensile strength, bending strength and rigidity, so that the electronic product shell also has the excellent characteristics, and the application requirements of the electronic product shell can be met.

The following description is made with reference to specific embodiments.

Example 1

The embodiment provides a composite material and a preparation method thereof.

The composite material comprises the following components in percentage by weight:

the first coupling agent modified potassium octatitanate comprises potassium octatitanate, a silicon dioxide coating layer coated on the surface of the potassium octatitanate and a vinyl triethoxysilane coupling agent connected to the outer surface of the silicon dioxide coating layer, and the second coupling agent modified titanium silicon carbide comprises titanium silicon carbide nano particles and a vinyl trimethoxysilane coupling agent connected to the surfaces of the titanium silicon carbide nano particles.

The preparation method of the composite material comprises the following steps:

s11: preparing first coupling agent modified potassium octatitanate:

the mass ratio is 85:10:5, weighing potassium octatitanate, sodium silicate and vinyl triethoxysilane coupling agent; dispersing potassium octatitanate in water to form potassium octatitanate dispersion liquid, and dissolving sodium silicate in water to obtain sodium silicate solution;

heating the potassium octatitanate dispersion liquid in water bath, adding sodium silicate solution under stirring, then dripping dilute sulfuric acid to adjust the pH value of the reaction system to 9.5, and filtering, washing and drying after the reaction is finished to obtain the silicon dioxide coated potassium octatitanate;

dispersing a vinyl triethoxysilane coupling agent in a solvent, slowly adding a proper amount of silicon dioxide coated potassium octatitanate in an ultrasonic vibration machine, stirring to remove most of the solvent after complete mixing, and drying in a baking oven at 150 ℃ to obtain first coupling agent modified potassium octatitanate;

s12: preparing second coupling agent modified titanium silicon carbide:

the mass ratio is 90:10, weighing titanium silicon carbide nano particles and a vinyl trimethoxy silane coupling agent; dispersing a vinyl trimethoxy silane coupling agent in a solvent, then adding titanium silicon carbide nano particles, stirring and carrying out ultrasonic vibration until the titanium silicon carbide nano particles are uniformly dispersed, and standing at room temperature to completely evaporate the solvent to obtain titanium silicon carbide modified by a second coupling agent;

s13: the mass ratio is 10:10:70:2:5: respectively weighing the first coupling agent modified potassium octatitanate, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the chitosan, the diphenylamine and the calcium stearate;

s14: putting the first coupling agent modified potassium octatitanate, the second coupling agent modified titanium silicon carbide and the acrylonitrile-butadiene-styrene copolymer into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min, mixing for 2-3 h, adding chitosan, diphenylamine and calcium stearate, mixing uniformly, and then adding into a double-screw extruder for melt extrusion granulation to obtain a composite material;

example 2

The embodiment provides a composite material and a preparation method thereof.

The preparation method of the composite material of the present embodiment specifically refers to the steps of embodiment 1, and is different in that step S21 of the present embodiment is that the mass ratio is 90:8:2, weighing potassium octatitanate, sodium silicate and vinyl triethoxysilane coupling agent; step S22 is to obtain the following components in percentage by mass: 5, weighing titanium silicon carbide nano particles and a vinyl trimethoxy silane coupling agent; step S23 is to obtain a mass ratio of 12:18:60:2:5: and 3, respectively weighing the potassium octatitanate modified by the first coupling agent, the titanium silicon carbide modified by the second coupling agent, the acrylonitrile-butadiene-styrene copolymer, the chitosan, the diphenylamine and the calcium stearate.

Example 3

The embodiment provides a composite material and a preparation method thereof.

The preparation method of the composite material of this embodiment specifically refers to the steps of embodiment 1, and is different in that step S31 of this embodiment is that the mass ratio is 88:9:3 weighing potassium octatitanate, sodium silicate and vinyl triethoxysilane coupling agent; step S32 is to obtain the following components according to the mass ratio of 93:7, weighing titanium silicon carbide nano particles and a vinyl trimethoxy silane coupling agent; step S33 is to obtain a mass ratio of 15:20:55:2:5: and 3, respectively weighing the potassium octatitanate modified by the first coupling agent, the titanium silicon carbide modified by the second coupling agent, the acrylonitrile-butadiene-styrene copolymer, the chitosan, the diphenylamine and the calcium stearate.

Example 4

The embodiment provides a composite material and a preparation method thereof.

the first coupling agent modified potassium hexatitanate comprises potassium hexatitanate, a silicon dioxide coating layer coated on the surface of the potassium hexatitanate and a vinyl triethoxysilane coupling agent connected to the outer surface of the silicon dioxide coating layer, and the second coupling agent modified titanium silicon carbide comprises titanium silicon carbide nano particles and neopentyl (diallyl) oxy tridecyl titanate coupling agent connected to the surfaces of the titanium silicon carbide nano particles.

The preparation method of the composite material comprises the following steps:

s41: preparing first coupling agent modified potassium hexatitanate:

the mass ratio is 90:5:5, weighing potassium hexatitanate, potassium silicate and vinyl triethoxysilane coupling agent; dispersing potassium hexatitanate in water to form potassium hexatitanate dispersion liquid, and dissolving potassium silicate in water to obtain potassium silicate solution;

heating the potassium hexatitanate dispersion liquid in a water bath, adding a potassium silicate solution under a stirring state, then dripping dilute sulfuric acid to adjust the pH value of a reaction system to 9.5, and filtering, washing and drying after the reaction is finished to obtain silicon dioxide coated potassium hexatitanate;

dispersing a vinyl triethoxysilane coupling agent in a solvent, slowly adding a proper amount of silicon dioxide coated potassium hexatitanate in an ultrasonic vibration machine, stirring to remove most of the solvent after complete mixing, and drying in a baking oven at 150 ℃ to obtain first coupling agent modified potassium hexatitanate;

s42: preparing second coupling agent modified titanium silicon carbide:

the mass ratio is 93: weighing titanium silicon carbide nano-particles and neopentyl (diallyl) oxy tridecyl titanate coupling agent; dispersing a neopentyl (diallyl) oxy tridecyl titanate coupling agent in a solvent, then adding titanium silicon carbide nano particles, stirring, performing ultrasonic vibration until the dispersion is uniform, and standing at room temperature to completely evaporate the solvent to obtain titanium silicon carbide modified by a second coupling agent;

s43: the mass ratio is 12:18:60:2:5:3, respectively weighing the potassium octatitanate modified by the first coupling agent, the titanium silicon carbide modified by the second coupling agent, the acrylonitrile-butadiene-styrene copolymer, the chitin, the antioxidant 3114 and the calcium ricinoleate;

s44: putting the potassium hexatitanate modified by the first coupling agent, the titanium silicon carbide modified by the second coupling agent and the acrylonitrile-butadiene-styrene copolymer into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min, mixing for 2-3 h, adding chitin, antioxidant 3114 and calcium ricinoleate, mixing uniformly, and then adding into a double-screw extruder for melt extrusion granulation to obtain a composite material;

comparative example 1

This comparative example provides a commercially available ABS material that does not contain any toughening component as compared to the examples.

Comparative example 2

This comparative example provides a composite material and a method of making the same.

the preparation method of the composite material comprises the following steps:

s1: the mass ratio is 12:78:2:5:3, respectively weighing potassium titanate, acrylonitrile-butadiene-styrene copolymer, chitosan, diphenylamine and calcium stearate;

s2: and (3) putting the potassium titanate and the acrylonitrile-butadiene-styrene copolymer into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min, mixing for 2-3 h, adding chitosan, diphenylamine and calcium stearate, uniformly mixing, and then adding into a double-screw extruder for melt extrusion granulation to obtain the composite material.

Comparative example 3

The comparative example provides a composite material comprising the following components in percentage by weight:

the preparation method of the composite material comprises the following steps:

s1: the mass ratio is 12:18:60:2:5:3, respectively weighing potassium titanate, titanium silicon carbide nano particles, acrylonitrile-butadiene-styrene copolymer, chitosan, diphenylamine and calcium stearate;

s2: the preparation method comprises the steps of placing potassium titanate, titanium silicon carbide nano particles and acrylonitrile-butadiene-styrene copolymer into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min, mixing for 2-3 h, adding chitosan, diphenylamine and calcium stearate, uniformly mixing, and then adding into a double-screw extruder for melting, blending, extruding and granulating to obtain the composite material.

Correlation performance test analysis:

to verify the advancement of the composite materials of the examples herein, performance tests were performed on the examples herein and the comparative examples.

The products obtained in examples 1 to 4 and comparative examples 1 to 3 were pelletized and then batch-blended, and then injection molded into standard bars using a plastic injection molding machine at a temperature of 210 ℃. The injection molded bars were immediately placed in a glass desiccator and subjected to mechanical property testing after at least 24 hours at room temperature, the test results are shown in Table 1 below.

The performance testing method comprises the following steps:

tensile strength was measured according to the method of ASTM D638 tensile Property test method for Plastic articles;

flexural Strength according to the procedure of ASTM-D790-03 Standard test method for the non-reinforced and reinforced plastic and electric insulation Material flexibility;

tensile elastic modulus was measured according to GBT1040-2006 determination of Plastic tensile Properties;

shore hardness is in accordance with the method of ASTM D2240 durometer Standard test method.

TABLE 1

From the above test results, it is known that the mechanical properties such as tensile strength, flexural strength, tensile elastic modulus and shore hardness of the standard spline prepared from the composite materials of examples 1 to 4 are significantly higher than those of the standard spline prepared from the commercial ABS material of comparative example 1 to which no toughening component is added; the mechanical properties of the standard spline prepared by the composite material of the example 2, such as tensile strength, bending strength, tensile elastic modulus, shore hardness and the like, are obviously higher than those of the standard spline prepared by the composite material of the comparative example 2 added with only potassium titanate, and are also obviously higher than those of the standard spline prepared by the composite material of the comparative example 3 added with the potassium titanate and titanium silicon carbide nano particles which are not modified by the modification of the coupling agent, which indicates that the mechanical properties of the composite material, such as tensile strength, bending strength, rigidity and hardness, and the like, can be greatly improved by modifying ABS by adding the titanate modified by the first coupling agent and the titanium silicon carbide modified by the second coupling agent. The composite materials of the embodiments 1 to 4 have excellent mechanical properties such as tensile strength, bending strength, rigidity and hardness, and can be widely applied to the electronic product industry.

The foregoing description of the preferred embodiments of the present application is not intended to be limiting, but is intended to cover any and all modifications, equivalents, and alternatives falling within the spirit and principles of the present application.

Claims

1. A composite material, characterized by comprising the following components in percentage by weight, based on 100% of the total weight of the composite material:

2. the composite material of claim 1, wherein the first coupling agent modified potassium titanate comprises a potassium titanate, a silica coating coated on the surface of the potassium titanate, and a first coupling agent attached to the outer surface of the silica coating; and/or

The second coupling agent modified titanium silicon carbide comprises titanium silicon carbide nano particles and a second coupling agent connected to the surfaces of the titanium silicon carbide nano particles.

3. The composite material of claim 2, wherein the first coupling agent is selected from silane coupling agents; and/or

The second coupling agent is at least one selected from silane coupling agents and titanate coupling agents.

4. A composite material according to any one of claims 1 to 3, wherein the potassium titanate comprises at least one of potassium hexatitanate, potassium octatitanate; and/or

The antibacterial agent is at least one selected from chitosan, chitin and tea polyphenol; and/or

The antioxidant is at least one selected from phenolic antioxidants and aminic antioxidants; and/or

The stabilizer is at least one selected from calcium stearate, calcium ricinoleate, zinc stearate and zinc ricinoleate.

5. A method of preparing a composite material, comprising the steps of:

and carrying out melt extrusion granulation on the mixture to obtain the composite material.

6. The method of preparing a composite material according to claim 5, wherein the method of preparing the first coupling agent modified potassium titanate salt comprises:

dispersing potassium titanate in water to form a dispersion; dissolving silicate in water to form silicate solution;

adding the silicate solution and the acid solution into the dispersion liquid to carry out silicon-coated treatment to obtain silicon dioxide coated potassium titanate;

and mixing the silicon dioxide coated potassium titanate with a solution containing a first coupling agent for carrying out first surface modification treatment, and then drying to obtain the first coupling agent modified potassium titanate.

7. The method of producing a composite material according to claim 6, wherein the mass ratio of the potassium titanate salt, the silicate and the first coupling agent is (85 to 90): (5-10): (2-5);

the temperature of the silicon-coated treatment is 85-95 ℃ and the pH value is 9-10.

8. The method of preparing a composite material according to claim 5, wherein the method of preparing the second coupling agent modified titanium silicon carbide comprises:

adding titanium silicon carbide nano-particles into a solution containing a second coupling agent to perform second surface modification treatment to obtain titanium silicon carbide modified by the second coupling agent;

wherein the mass ratio of the titanium silicon carbide nanoparticle to the second coupling agent is (90:95): (5-10).

9. The method of producing a composite material according to any one of claims 5 to 8, wherein the step of mixing the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide, the acrylonitrile-butadiene-styrene copolymer, the antibacterial agent, the antioxidant, and the stabilizer comprises:

and (2) placing the first coupling agent modified potassium titanate, the second coupling agent modified titanium silicon carbide and the acrylonitrile-butadiene-styrene copolymer into a high-speed mixer with the working temperature of 230-240 ℃ and the rotating speed of 1000-1500 r/min, mixing for 2-3 h, and then adding the antibacterial agent, the antioxidant and the stabilizer, and uniformly mixing.

10. An electronic product housing, characterized in that it consists of a composite material according to any one of claims 1 to 4 or a composite material produced by a production method according to any one of claims 5 to 9.