Flame-retardant finishing method for polyacrylonitrile carbon fiber

A polyacrylonitrile-based carbon fiber and flame-retardant finishing technology, which is applied in the direction of carbon fiber, fiber treatment, flame-retardant fiber, etc., can solve the problems affecting the performance of composite materials and complicated preparation process, and achieve low environmental pollution, simple production process, Inexpensive effect

Active Publication Date: 2019-12-20
绍兴市德承机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, many scholars have conducted extensive research on the flame-retardant properties of carbon fibers. Chinese patent application number 201410157894.5 discloses a flame-retardant carbon fiber impregnation and its preparation method, which includes a carbon fiber layer and a flame-retardant epoxy resin, wherein the flame-retardant epoxy The resin is impregnated in the carbon fiber layer, and the preparation process of this method is r

Method used

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  • Flame-retardant finishing method for polyacrylonitrile carbon fiber

Examples

Experimental program
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Example Embodiment

[0019] Example 1

[0020] In this embodiment, a flame-retardant finishing method of polyacrylonitrile-based carbon fiber includes the following steps:

[0021] Step 1: Degumming of carbon fiber: The carbon fiber is placed in acetone solvent, the temperature is set to 55°C, the degumming time is 1.5h, and the bath ratio is 1:25.

[0022] Step 2: Sizing and finishing of carbon fiber: The carbon fiber enters the sizing tank equipped with flame-retardant sizing agent through the guide roller, and then enters the drying oven from the squeezing roller to dry, and the sizing amount is controlled at 1.2%;

[0023] The preparation method of the flame retardant sizing agent is:

[0024] Weigh 0.8g sodium dodecylbenzene sulfonate, 1.5g octylphenol polyoxyethylene ether emulsifier, 0.15mol acrylic acid, 0.3mol vinyl phosphate and 0.8g ammonium persulfate initiator, and combine all ten Sodium dialkylbenzene sulfonate, octylphenol polyoxyethylene ether emulsifier and 1 / 3 of the total acrylic acid, v...

Example Embodiment

[0029] Example 2

[0030] In this embodiment, a flame-retardant finishing method of polyacrylonitrile-based carbon fiber includes the following steps:

[0031] Step 1: Degumming of carbon fiber: The carbon fiber is placed in acetone solvent, the temperature is adjusted to 50°C, the degumming time is 1.5h, and the bath ratio is 1:20.

[0032] Step 2: Sizing and finishing of carbon fiber: The carbon fiber enters the sizing tank equipped with flame-retardant sizing agent through the guide roller. After being infiltrated, the squeezing roller enters the drying oven to dry, and the sizing amount is controlled at 1.0%;

[0033] The preparation method of the flame retardant sizing agent is:

[0034] Weigh 0.5 g of sodium dodecyl benzene sulfonate, 1 g of octyl phenol polyoxyethylene ether emulsifier, 0.1 mol of acrylic acid, 0.2 mol of vinyl phosphate and 0.5 g of ammonium persulfate initiator. Sodium alkyl benzene sulfonate, octyl phenol polyoxyethylene ether emulsifier and acrylic acid, vin...

Example Embodiment

[0039] Example 3

[0040] In this embodiment, a flame-retardant finishing method of polyacrylonitrile-based carbon fiber includes the following steps:

[0041] Step 1: Degumming of carbon fiber: The carbon fiber is placed in acetone solvent, the temperature is adjusted to 53°C, the degumming time is 2h, and the bath ratio is 1:30.

[0042] Step 2: Sizing and finishing of carbon fiber: The carbon fiber enters the sizing tank equipped with flame-retardant sizing agent through the guide roller, and then enters the drying oven from the squeezing roller to dry, and the sizing amount is controlled at 1.5%;

[0043] The preparation method of the flame retardant sizing agent is:

[0044] Weigh out 1g of sodium dodecylbenzene sulfonate, 2g of octylphenol polyoxyethylene ether emulsifier, 0.2mol of acrylic acid, 0.4mol of vinyl phosphate and 1g of ammonium persulfate initiator. Sodium benzene sulfonate, octyl phenol polyoxyethylene ether emulsifier and acrylic acid, vinyl phosphate and ammonium ...

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Abstract

The invention relates to a flame-retardant finishing method for a polyacrylonitrile-based carbon fiber. The method is characterized by comprising the steps that firstly, the polyacrylonitrile-based carbon fiber is subjected to gel removal, a prepared flame-retardant sizing agent is used for sizing finishing on the carbon fiber, and then a layer-by-layer self-assembly technology is adopted for alternate adsorption on a cationic poly-(diallyldimethylammonium chloride) and an anionic flame retardant separately. It is shown through a flame-retardant experiment that the initial limit oxygen index of the carbon fiber obtained after flame-retardant finishing reaches 29% or above; after 10-time washing with water, the initial limit oxygen index of the carbon fiber is not obviously decreased and still reaches 28% or above. The carbon fiber prepared through the method has high flame retardance, the overall production technology is simple, the cost is low, and the environmental pollution in the production process is small.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber microspheres, and in particular relates to a method for flame-retardant finishing of polyacrylonitrile-based carbon fibers. Background technique [0002] Carbon fiber is a new type of fiber material with a carbon content of more than 92% or carbon allotropes as structural units. It has the characteristics of high strength, high modulus, light weight, and stable chemical properties. It is used in aerospace , military, automobile, construction and other fields are widely used. At present, the main raw material of carbon fiber is polyacrylonitrile, which occupies more than 90% of the carbon fiber market, and the rest comes from viscose and asphalt. [0003] With the rapid development of carbon fiber, it has been widely used in more and more fields. Many fields have high requirements for the flame retardancy of carbon fiber. The development of a carbon fiber with flame retardancy has become an u...

Claims

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Application Information

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IPC IPC(8): D06M15/356D06M15/263D06M13/127C08F220/06C08F230/02D06M101/40
CPCD06M15/3564D06M15/263D06M13/127C08F220/06C08F230/02D06M2200/30D06M2101/40
Inventor 彭雄义邓健刘仰硕王军蔡亚军于泽浩
Owner 绍兴市德承机电有限公司
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