阅读说明：本技术 碳纤维pa66热塑性复合材料中碳纤维的改性方法 (Method for modifying carbon fiber in carbon fiber PA66 thermoplastic composite material ) 是由 蔡福泉 于 2019-09-25 设计创作，主要内容包括：本发明涉及一种碳纤维PA66热塑性复合材料,特别涉及一种碳纤维PA66热塑性复合材料中碳纤维的改性方法。本发明提供了如下技术方案：一种碳纤维PA66热塑性复合材料中碳纤维的改性方法,步骤如下：a、将碳纤维投入有机溶液中实施浸泡；b、将步骤a中完成浸泡的碳纤维进行干燥,促使碳纤维表面形成有机层；c、将步骤c中表面具有有机层的碳纤维进行低温处理；d、将步骤c中实施低温处理的碳纤维的表面进行氧化处理。采用上述技术方案,提供了一种经过改性后,碳纤维易于粘接、粘接强度高的碳纤维PA66热塑性复合材料中碳纤维的改性方法。(The invention relates to a carbon fiber PA66 thermoplastic composite material, in particular to a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material. The invention provides the following technical scheme: a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material comprises the following steps: a. putting the carbon fiber into an organic solution for soaking; b. drying the carbon fiber soaked in the step a to promote the surface of the carbon fiber to form an organic layer; c. c, carrying out low-temperature treatment on the carbon fiber with the organic layer on the surface in the step c; d. and c, carrying out oxidation treatment on the surface of the carbon fiber subjected to low-temperature treatment in the step c. By adopting the technical scheme, the method for modifying the carbon fiber in the carbon fiber PA66 thermoplastic composite material is provided, wherein the carbon fiber is easy to bond and high in bonding strength after modification.)

1. A method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material is characterized by comprising the following steps: a. putting the carbon fiber into an organic solution for soaking; b. drying the carbon fiber soaked in the step a to promote the surface of the carbon fiber to form an organic layer; c. c, carrying out low-temperature treatment on the carbon fiber with the organic layer on the surface in the step c; d. and c, carrying out oxidation treatment on the surface of the carbon fiber subjected to low-temperature treatment in the step c.

2. The method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite according to claim 1, wherein: the organic solution in the step a is any one of phenolic resin slurry or aliphatic hydrocarbon solution, and the soaking time is 4-5 h.

3. The process for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite according to claim 1 or 2, wherein: the temperature of the low-temperature treatment in the step c is 180-220 ℃; the carbon fiber is any one of polyacrylonitrile-based carbon fiber, petroleum asphalt-based carbon fiber or coal asphalt-based carbon fiber.

4. The process for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite according to claim 1 or 2, wherein: and d, performing oxidation treatment on the surface of the carbon fiber by using an oxidation gas in the step d, wherein the oxidation gas is a mixed gas of chlorine or sulfur dioxide and argon or helium.

5. The method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite according to claim 3, wherein: and d, performing oxidation treatment on the surface of the carbon fiber by using an oxidation gas in the step d, wherein the oxidation gas is a mixed gas of chlorine or sulfur dioxide and argon or helium.

Technical Field

The invention relates to a carbon fiber PA66 thermoplastic composite material, in particular to a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material.

Background

Carbon fiber composite materials are an important branch of composite materials, and because of their excellent properties, the use and yield of such materials have been expanding in recent years. The self-molding method has the characteristics of quick molding, easy recovery and the like.

The carbon fiber PA66 thermoplastic composite material is mainly prepared from PA66 base material, carbon fiber and related auxiliary agents in proportion. The carbon fiber has the characteristics of high strength, high specific modulus, low density, high temperature resistance, chemical corrosion resistance, low resistance and the like, but the carbon fiber has low bonding strength and is easy to damage in the using process.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material, which is easy to bond carbon fibers and high in bonding strength after modification.

In order to achieve the purpose, the invention provides the following technical scheme: a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material is characterized by comprising the following steps: a. putting the carbon fiber into an organic solution for soaking; b. drying the carbon fiber soaked in the step a to promote the surface of the carbon fiber to form an organic layer; c. c, carrying out low-temperature treatment on the carbon fiber with the organic layer on the surface in the step c; d. and c, carrying out oxidation treatment on the surface of the carbon fiber subjected to low-temperature treatment in the step c.

Further comprises the following steps: the organic solution in the step a is any one of phenolic resin slurry or aliphatic hydrocarbon solution, and the soaking time is 4-5 h.

The temperature of the low-temperature treatment in the step c is 180-220 ℃; the carbon fiber is any one of polyacrylonitrile-based carbon fiber, petroleum asphalt-based carbon fiber or coal asphalt-based carbon fiber.

And d, carrying out oxidation treatment on the surface of the carbon fiber by using an oxidizing gas in the step d, wherein the oxidizing gas is a mixed gas of chlorine or sulfur dioxide and argon or helium.

By adopting the technical scheme, the carbon fiber is soaked in the organic solution, so that an organic layer is formed on the surface of the carbon fiber, and the organic layer can ensure that the carbon fiber has better adhesion; and then, low-temperature treatment is carried out on the carbon fiber, so that the organic layer on the surface of the carbon fiber can be completely fused with the carbon fiber, and the compatibility between the organic layer and the carbon fiber is improved.

Detailed Description

The invention relates to a method for modifying carbon fibers in a carbon fiber PA66 thermoplastic composite material, which comprises the following steps: a. putting the carbon fiber into an organic solution for soaking; b. drying the carbon fiber soaked in the step a to promote the surface of the carbon fiber to form an organic layer; c. c, carrying out low-temperature treatment on the carbon fiber with the organic layer on the surface in the step c; d. and c, carrying out oxidation treatment on the surface of the carbon fiber subjected to low-temperature treatment in the step c. In the scheme, the carbon fibers are soaked in the organic solution, so that an organic layer is formed on the surfaces of the carbon fibers, and the organic layer can enable the carbon fibers to have better adhesion; and then, low-temperature treatment is carried out on the carbon fiber, so that the organic layer on the surface of the carbon fiber can be completely fused with the carbon fiber, and the compatibility between the organic layer and the carbon fiber is improved.

In the embodiment of the invention, the organic solution in the step a is any one of phenolic resin slurry or aliphatic hydrocarbon solution, and the soaking time is 4-5 h. The temperature of the low-temperature treatment in the step c is 180-220 ℃; after the temperature treatment, the temperature is kept for 1 to 1.5 hours. The carbon fiber in the embodiment of the invention is any one of polyacrylonitrile-based carbon fiber, petroleum asphalt-based carbon fiber or coal asphalt-based carbon fiber. Of course, viscose-based carbon fibers, phenolic-based carbon fibers, vapor grown carbon fibers are also possible.

In the embodiment of the present invention, the oxidation treatment in step d is performed on the surface of the carbon fiber by using an oxidizing gas, which is a mixed gas of chlorine gas or sulfur dioxide and argon gas or helium gas. Of course, a mixed gas of nitrogen dioxide and radon gas is also feasible.