Carbon fibre bar containing super fine and preparation thereof

Abstract

The invention relates to a carbon fiber stick containing ultra-thin powder and a preparation method thereof. The carbon fiber stick is compounded and prepared by taking carbon fibers, ultra-thin powder and thermosetting resins; wherein, the content of the carbon fiber is larger than 55 percent; the content of the ultra-thin powder filled in the carbon fibers is within 10 percent and the rest is the thermosetting resins. The preparation method thereof includes the following steps: 1) the thermosetting resins are used as a substrate, the carbon fibers are used as reinforcement and an accessory ingredient corresponding to the resin liquid is added in the resin liquid to prepare a pre-mixed liquid; 2) after the ultra-thin powder is completely dipped by a coupling agent, the ultra-thin powder is uniformly dispersed into the pre-mixed liquid to prepare a mixed liquid; 3) after the carbon fibers are completely dipped in the mixed liquid, the carbon fiber stick containing the ultra-thin powder is manufactured by adopting a pultrusion method. A solid fabric shaped by the carbon fiber stick can form a prefabricated part of compound materials containing the ultra-thin powder. The carbon fiber stick can be applied to the construction reinforcement industry as well.

Description

technical field

[0001] The invention relates to a carbon fiber-reinforced thermosetting resin-based pultrusion composite material, in particular to a carbon fiber rod containing ultrafine powder added in a pultrusion process and a preparation method thereof, belonging to the field of composite materials. Background technique

[0002] Carbon fiber / thermosetting resin pultruded carbon fiber rod is a high-performance composite material, which has a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, creep resistance and small thermal expansion coefficient. Epoxy, vinyl ester and other resins have the characteristics of corrosion resistance, high transverse mechanical properties and good heat resistance, and are widely used in various fields of national economy. Pultrusion is an important method to manufacture high fiber volume content, high performance, low cost, continuous processing composite materials.

[0003] Research ...

Examples

Embodiment 1

[0046] Vinyl ester resin (100 parts), low-temperature initiator (1.5 parts), high-temperature initiator (1.5 parts), and release agent (1 part) were mixed uniformly with a low-speed stirrer. In addition, the dried and dehydrated ZrC (18 parts) with a particle size of 40 nm was infiltrated with a coupling agent (3 parts) under stirring, and then treated with ultrasonic dispersion for 40 minutes to obtain a mixed solution. The 8K carbon fiber yarn is drawn into a mold with a diameter of 0.70mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature (the first temperature zone is 70±5°C, the second temperature zone is 110±5°C, the third temperature zone is 135±5°C), and select the appropriate traction speed for continuous Stable pultruded carbon fiber rod. The obtained carbon fiber rods have an average diameter of 0.75 mm. After testing, the carbon fiber content is 67%, and the Zr content is 5.0%. R...

Embodiment 2

[0048] Unsaturated polyester resin (100 parts), high temperature curing agent (1 part), high temperature initiator (1 part), medium temperature initiator (1 part), low temperature initiator (0.7 part), mold release agent (3 parts) , low shrinkage agent (15 parts), mix well with a low-speed mixer. In addition, in the stirring state, the ZrB with a particle size of 2.0 μm has been dried and dehydrated 2 (30 parts) soaked with coupling agent (2 parts), and then treated with an internal cutting emulsifier, controlling the speed at 3000-5000rpm, and the time is 20-30min, so that the mixture is uniformly stirred at a high speed until it meets the predetermined viscosity value. Stir During the process, the temperature of the glue solution was kept at 30°C±2°C. At the same time, the 24K carbon fiber yarn is drawn into a mold with a diameter of 1.2mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature,...

Embodiment 3

[0050] Bisphenol A type epoxy resin (100 parts), curing agent (6 parts), accelerator (2 parts), toughening agent (12 parts), release agent (3 parts), diluent (5 parts), Mix well with mixer on low speed. In addition, soak the dried and dehydrated ZrC (7 parts) with a particle size of 40nm and HfC (7 parts) with a particle size of 1.2μm with a coupling agent (3 parts) in a stirring state, and first process it with an internal emulsifier , control the rotation speed at 4500rpm, and the time is 20min, so that the mixture is uniformly stirred at a high speed, and then it is treated with ultrasonic dispersion method for 20min to prepare the mixture, and the temperature of the constant temperature system of the dipping tank is set at 60±5°C. At the same time, the 66K carbon fiber yarn is drawn into a mold with a diameter of 2.0 mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature (the first temperat...

technical field

[0001] The invention relates to a carbon fiber-reinforced thermosetting resin-based pultrusion composite material, in particular to a carbon fiber rod containing ultrafine powder added in a pultrusion process and a preparation method thereof, belonging to the field of composite materials. Background technique

[0002] Carbon fiber / thermosetting resin pultruded carbon fiber rod is a high-performance composite material, which has a series of excellent properties such as high specific strength, high specific modulus, fatigue resistance, creep resistance and small thermal expansion coefficient. Epoxy, vinyl ester and other resins have the characteristics of corrosion resistance, high transverse mechanical properties and good heat resistance, and are widely used in various fields of national economy. Pultrusion is an important method to manufacture high fiber volume content, high performance, low cost, continuous processing composite materials.

[0003] Research ...

Examples

Embodiment 1

[0046] Vinyl ester resin (100 parts), low-temperature initiator (1.5 parts), high-temperature initiator (1.5 parts), and release agent (1 part) were mixed uniformly with a low-speed stirrer. In addition, the dried and dehydrated ZrC (18 parts) with a particle size of 40 nm was infiltrated with a coupling agent (3 parts) under stirring, and then treated with ultrasonic dispersion for 40 minutes to obtain a mixed solution. The 8K carbon fiber yarn is drawn into a mold with a diameter of 0.70mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature (the first temperature zone is 70±5°C, the second temperature zone is 110±5°C, the third temperature zone is 135±5°C), and select the appropriate traction speed for continuous Stable pultruded carbon fiber rod. The obtained carbon fiber rods have an average diameter of 0.75 mm. After testing, the carbon fiber content is 67%, and the Zr content is 5.0%. R...

Embodiment 2

[0048] Unsaturated polyester resin (100 parts), high temperature curing agent (1 part), high temperature initiator (1 part), medium temperature initiator (1 part), low temperature initiator (0.7 part), mold release agent (3 parts) , low shrinkage agent (15 parts), mix well with a low-speed mixer. In addition, in the stirring state, the ZrB with a particle size of 2.0 μm has been dried and dehydrated 2 (30 parts) soaked with coupling agent (2 parts), and then treated with an internal cutting emulsifier, controlling the speed at 3000-5000rpm, and the time is 20-30min, so that the mixture is uniformly stirred at a high speed until it meets the predetermined viscosity value. Stir During the process, the temperature of the glue solution was kept at 30°C±2°C. At the same time, the 24K carbon fiber yarn is drawn into a mold with a diameter of 1.2mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature,...

Embodiment 3

[0050] Bisphenol A type epoxy resin (100 parts), curing agent (6 parts), accelerator (2 parts), toughening agent (12 parts), release agent (3 parts), diluent (5 parts), Mix well with mixer on low speed. In addition, soak the dried and dehydrated ZrC (7 parts) with a particle size of 40nm and HfC (7 parts) with a particle size of 1.2μm with a coupling agent (3 parts) in a stirring state, and first process it with an internal emulsifier , control the rotation speed at 4500rpm, and the time is 20min, so that the mixture is uniformly stirred at a high speed, and then it is treated with ultrasonic dispersion method for 20min to prepare the mixture, and the temperature of the constant temperature system of the dipping tank is set at 60±5°C. At the same time, the 66K carbon fiber yarn is drawn into a mold with a diameter of 2.0 mm by needle and thread, and dipped in glue. Start the air compressor and rod drawing machine, adjust the three-stage heating temperature (the first temperat...

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