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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 relatively complicated; Chinese patent application number 201510571583.8 discloses an environmentally friendly flame-retardant carbon fiber reinforced polyamide composite material and its preparation method and application. The composite material includes polyamide, carbon fiber, polyvinylidene fluoride, Composite flame retardant, dispersant, etc. The composite flame retardant in this method will affect the performance of the composite material

Method used

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  • Flame-retardant finishing method for polyacrylonitrile carbon fiber

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Embodiment 1

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

[0021] Step 1: Degumming of carbon fibers: place carbon fibers in acetone solvent, set the temperature at 55° C., degumming time for 1.5 h, and bath ratio of 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 after being soaked, it is then sent to the drying oven by the extrusion roller for drying, and the sizing amount is controlled at 1.2%;

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

[0024] Take by weighing 0.8g of sodium dodecylbenzenesulfonate, 1.5g of octylphenol polyoxyethylene ether emulsifier, 0.15mol of acrylic acid, 0.3mol of vinyl phosphate and 0.8g of ammonium persulfate initiator. Sodium dialkylbenzenesulfonate, octylphenol polyoxyethylene ether emulsifier and acrylic a...

Embodiment 2

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

[0031] Step 1: Degumming of carbon fibers: place carbon fibers in acetone solvent, set the temperature at 50° C., degumming time for 1.5 h, and bath ratio of 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, and after being soaked, it is then sent to the drying oven by the extrusion roller for drying, and the sizing amount is controlled at 1.0%;

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

[0034] Take by weighing 0.5g sodium dodecylbenzene sulfonate, 1g octylphenol polyoxyethylene ether emulsifier, 0.1mol acrylic acid, 0.2mol vinyl phosphate and 0.5g ammonium persulfate initiator, all dodecylbenzene Dissolve sodium alkylbenzene sulfonate, octylphenol polyoxyethylene ether emulsifier and...

Embodiment 3

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

[0041] Step 1: Degumming of carbon fibers: place carbon fibers in acetone solvent, set the temperature at 53° C., degumming time for 2 hours, and bath ratio of 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 after being soaked, it is then sent to the drying oven by the extrusion roller for drying, and the sizing amount is controlled at 1.5%;

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

[0044] Weigh 1g of sodium dodecylbenzenesulfonate, 2g of octylphenol polyoxyethylene ether emulsifier, 0.2mol of acrylic acid, 0.4mol of vinyl phosphate and 1g of ammonium persulfate initiator, and mix all the dodecylbenzene Dissolve sodium benzenesulfonate, octylphenol polyoxyethylene ether emulsif...

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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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