Carbon nanotube-modified epoxy resin adhesive for sticky carbon fiber reinforcement
A carbon nanotube modification, epoxy resin glue technology, applied in epoxy resin glue, non-polymer adhesive additives, adhesives and other directions, can solve problems such as affecting the reinforcement effect of carbon fiber Enhance, improve the effect of the effect
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Embodiment 1
[0020] 1 g of multi-walled carbon nanotubes was added to 100 g of epoxy resin matrix, and treated with an ultrasonic disperser for 5 hours to fully disperse the multi-walled carbon nanotubes in the epoxy resin matrix to obtain an adhesive.
[0021] During construction, add 30g of curing agent for epoxy resin to 100g of adhesive, mix well and then use it for carbon fiber reinforcement.
[0022] Some mechanical properties of the adhesive after curing are as follows:
[0023] Tensile strength 48MPa; compressive strength 80MPa; bending strength 52MPa; tensile shear strength 15MPa.
Embodiment 2
[0025] 1g of single-walled carbon nanotubes were added to 100mL of mixed acid consisting of sulfuric acid and nitric acid (wherein the volume ratio of sulfuric acid to nitric acid was 3:1, the mass fraction of sulfuric acid was 65%, and the mass fraction of nitric acid was 60%). Ultrasonic treatment at 70°C for 5 hours, with an ultrasonic power of 50W, to remove impurities in the single-walled carbon nanotubes and oxidize the carboxyl groups, and then repeatedly wash and filter the carboxylated single-walled carbon nanotubes with deionized water Until the filtrate is neutral, dry it for later use.
[0026] 0.5 g of carboxylated single-walled carbon nanotubes were placed in a 100 mL flask, and 50 mL of thionyl chloride (SOCl 2 ), magnetically stirred at 70°C and refluxed for 24 hours, and the excess SOCl was distilled off under reduced pressure 2 , the product was poured into 100mL chloroform, ultrasonicated for 10min, filtered under reduced pressure, and rinsed with 200mL chl...
Embodiment 3
[0032] 2g of single-walled carbon nanotubes were added to 100mL of mixed acid consisting of sulfuric acid and nitric acid (wherein the volume ratio of sulfuric acid to nitric acid was 3:1, the mass fraction of sulfuric acid was 70%, and the mass fraction of nitric acid was 50%). Ultrasonic treatment at 70°C for 5 hours, with an ultrasonic power of 50W, to remove impurities in the single-walled carbon nanotubes and oxidize the carboxyl groups, and then repeatedly wash and filter the carboxylated single-walled carbon nanotubes with deionized water Until the filtrate is neutral, dry it for later use.
[0033] 1 g of carboxylated single-walled carbon nanotubes was placed in a 500 mL flask, and 200 mL of thionyl chloride (SOCl 2 ) and 8 mL of DMF, magnetically stirred at 70°C and refluxed for 24 hours, then distilled off excess SOCl under reduced pressure 2 , the product was poured into 200mL chloroform, ultrasonicated for 10min, filtered under reduced pressure, and rinsed with 30...
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