US 11,999,082 B2
Fast-curing molding process for epoxy resin based on electromagnetic induction heating
Renfu Li, Wuhan (CN); Yichao Li, Wuhan (CN); Ao Sun, Wuhan (CN); and Jiaji Sun, Wuhan (CN)
Assigned to Huazhong University of Science and Technology, Wuhan (CN)
Filed by Huazhong University of Science and Technology, Wuhan (CN)
Filed on Oct. 26, 2023, as Appl. No. 18/494,793.
Claims priority of application No. 202211400857.3 (CN), filed on Nov. 9, 2022.
Prior Publication US 2024/0149500 A1, May 9, 2024
Int. Cl. B29C 35/08 (2006.01); B29C 39/00 (2006.01); B29C 39/38 (2006.01); B29K 63/00 (2006.01); B29K 505/12 (2006.01)
CPC B29C 35/0805 (2013.01) [B29C 39/003 (2013.01); B29C 39/38 (2013.01); B29C 2035/0811 (2013.01); B29K 2063/00 (2013.01); B29K 2505/12 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A fast-curing molding process for epoxy resin based on electromagnetic induction heating, comprising the following steps:
S1, mixing epoxy resin A glue and a protein-grafted manganese-zinc-iron oxide nanomaterial into a colloidal state to obtain a mixture, and grinding the mixture for 10 to 30 min;
S2, adding epoxy resin B glue to the mixture in S1, and performing ultrasonic dispersion at 20 to 30° C. for 10 to 30 min; and
S3, placing the mixture obtained after ultrasonic dispersion in S2 in a vacuum environment for 20 to 40 min, then taking the mixture out and injecting the mixture into a mold, placing the mold and the mixture into an electromagnetic induction heater, placing the electromagnetic induction heater in a magnetic field environment with a magnetic field intensity of 1 to 1.5 mT for 2 to 3 h, cooling and then taking them out to obtain a cured epoxy resin, wherein
a method for preparing the protein-grafted manganese-zinc-iron oxide nanomaterial comprises the following steps:
S1, dissolving gelatin powder in 50 to 60 mL of acetic acid solution, stirring magnetically at 50 to 60° C. for 50 to 60 min, then cooling to 20 to 30° C., then adding a manganese-zinc ferrite nanomaterial and performing ultrasonic treatment for 10 to 20 min; and
S2, performing suction filtration on the ultrasonically-treated mixed solution, washing the mixed solution with deionized water for 3 to 5 times, drying for 10 to 12 h, and grinding to obtain the protein-grafted manganese-zinc ferrite nanomaterial;
a mass ratio of the epoxy resin A glue to the epoxy resin B glue to the protein-grafted manganese-zinc-iron oxide nanomaterial is 10:(3-3.5):(1.8-2.5); and
a mass ratio of the gelatin powder to the manganese-zinc ferrite nanomaterial is 1:(2-3).