High-temperature-resistant carbon fiber sizing agent containing alkylated graphene, preparation method and application
A carbon fiber, high temperature resistant technology, used in carbon fiber, fiber processing, textiles and papermaking, etc., can solve problems such as strong corrosion, a large amount of waste acid water, interface defects, etc., to ensure stability and durability, and improve dispersion stability. , the effect of improving interface performance
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Embodiment 1
[0049] Preparation of alkylated graphene: disperse 0.5g of graphene oxide with a size of no more than 1 μm into 40ml of anhydrous acetonitrile, sonicate for 1h, add 0.5g of DIC, react at 70°C for 4h, and activate the carboxyl groups on the surface of graphene oxide;
[0050] Add 1 g of octadecyl primary amine, and reflux at 80° C. for 8 h under the protection of nitrogen. After the reaction, the product was washed successively with N,N-dimethylacetamide and acetone to remove residual DIC and octadecyl primary amine, and then the product was vacuum-dried at 60° C. for 6 h to obtain alkylated graphene.
[0051] Preparation of high temperature resistant carbon fiber sizing agent:
[0052] (1) Add 2g of polyetherimide to 198g of chloroform, and ultrasonicate for 1 to 2 hours to obtain a 1wt% polyetherimide solution;
[0053] (2) Dispersing 0.005 g of alkylated graphene into the polyetherimide solution in step (1), and ultrasonicating for 1-2 hours to obtain a high-temperature-res...
Embodiment 2
[0063] Preparation of alkylated graphene: disperse 0.5g of graphene oxide with a size of about 5μm into 40ml of anhydrous acetonitrile, ultrasonicate for 1h, add 0.5g of DIC, react at 70°C for 4h, activate the carboxyl groups on the surface of graphene oxide; add 1g Octadecyl primary amine was refluxed at 80°C for 8h under the protection of nitrogen. After the reaction, the product was washed successively with N,N-dimethylacetamide and acetone to remove residual DIC and octadecyl primary amine, and then the product was vacuum-dried at 60° C. for 6 h to obtain alkylated graphene.
[0064]Preparation of high temperature resistant carbon fiber sizing agent: prepare a 1wt% polyetherimide solution according to the method of Example 1; disperse 0.005g of alkylated graphene into the 1wt% polyetherimide solution, and ultrasonicate for 1-2h to obtain High temperature resistant carbon fiber sizing agent.
[0065] The IFSS value between the carbon fiber treated with the high temperature...
Embodiment 3
[0067] Disperse 0.5 g of graphene oxide with a size of about 10 μm into 40 ml of anhydrous acetonitrile, sonicate for 1 h, add 0.5 g of DIC, and react at 70 ° C for 4 h to activate the carboxyl groups on the surface of graphene oxide; then add 1 g of octadecyl primary amine, Reflux at 80°C for 8h under the protection of nitrogen. After the reaction, the product was washed successively with N,N-dimethylacetamide and acetone to remove residual DIC and octadecyl primary amine, and then the product was vacuum-dried at 60° C. for 6 h to obtain alkylated graphene.
[0068] Prepare 1wt% polyetherimide solution according to the method of Example 1; disperse 0.005g of alkylated graphene in the 1wt% polyetherimide solution, ultrasonic 1~2h, obtain the polyetherimide containing alkylated graphene Carbon fiber sizing.
[0069] The IFSS value between the carbon fiber treated with the carbon fiber sizing agent prepared in this embodiment and the PEKK resin is only 75.4 MPa, which is lower ...
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