Method using acrylamide aqueous solution grafting to modify carbon fiber surface sizing agent
An acrylamide-based, graft-modified technology, applied in the direction of carbon fiber, fiber type, fiber treatment, etc., can solve the problem of low interface bonding strength, and achieve the effects of improving mechanical properties, protecting carbon fibers, and improving interface bonding strength.
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specific Embodiment approach 1
[0021] Specific implementation mode 1: This implementation mode is a method for grafting a modified carbon fiber surface sizing agent with an acrylamide aqueous solution, specifically according to the following steps:
[0022] 1. Configure the modifier solution: dissolve the modifier in water to obtain a modifier solution; the mass concentration of the modifier solution is 0.1% to 5.0%; the modifier is simultaneously in the molecular structure Acrylamide organic small molecules containing amino groups and unsaturated double bonds;
[0023] 2. Carbon fiber surface modification: heat the modifier solution prepared in step 1 to 50°C to 100°C, use the modifier solution at 50°C to 100°C to modify the surface of the carbon fiber, and rinse the surface treated carbon fiber with water , drying at a temperature of 60°C to 100°C for 2h to 6h to obtain carbon fibers modified by chemical grafting of surface sizing agents; the carbon fibers are unidirectional carbon fibers with epoxy type ...
specific Embodiment approach 2
[0025] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the acrylamide-type organic small molecules containing both amino groups and unsaturated double bonds in the molecular structure described in step 1 are acrylamide, methacrylamide, A mixture of one or more of phenylacrylamide and N-methylolacrylamide. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0026] Specific implementation mode three: as figure 1 As stated, the difference between this specific embodiment and specific embodiment one is: when the carbon fiber described in step two is a continuous fiber, the method for surface modification of the carbon fiber with the heated modifier solution in step two is:
[0027] The carbon fiber is immersed in the modifier solution at 50°C to 100°C by means of guide roller traction, and treated for 5min to 30min. Others are the same as in the first embodiment.
[0028] This embodiment is suitable for on-line continuous processing of continuous carbon fibers, has a high degree of automation, can effectively reduce carbon fiber fluffing and broken filaments caused by surface treatment, and improves the bundling property of modified carbon fibers.
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