Carbon-based nano cast nylon composite material and in-situ polymerization preparation method thereof

Abstract

The invention discloses a carbon-based nano cast nylon composite material and an in-situ polymerization preparation method thereof. The method is characterized by comprising the following steps of: heating a caprolactam raw material to between 70 and 120 DEG C for melting, adding carbon-based nano particles into the caprolactam melt in a weight ratio of the carbon-based nano particles to the caprolactam monomer of 0.1-5: 100, namely uniformly dispersing carbon-based nano particle graphite oxide or graphene into the caprolactam melt by using ultrasonic wave or in a grinding mode, heating the mixture to between 110 and 150 DEG C, dehydrating the mixture for 5 to 30 minutes under the vacuum of 0.05 to 0.098MPa, adding 0.1 to 1 weight part of catalyst and 0.1 to 1 weight part of cocatalyst into the mixture, casting the uniform mixture into a die preheated to between 150 and 180 DEG C, keeping the temperature for 30 to 60 minutes, and cooling the mixture to obtain the carbon-based nano cast nylon composite material. Compared with the carbon-based nano-free cast nylon material, the mechanical properties of the carbon-based nano cast nylon composite material such as tensile strength, tensile modulus, bending strength, elongation at break and the like are improved by 5 to 20 percent, and the abrasion resistance of the cast nylon composite material is improved.

Description

technical field [0001] The invention relates to a carbon-based nano-cast nylon composite material and an in-situ polymerization preparation method thereof, belonging to the field of preparation of polymer materials. Background technique [0002] Monomer cast nylon (referred to as MC nylon) is an engineering plastic prepared by anionic polymerization of caprolactam in the early 1960s. Its synthesis mechanism is completely different from hydrolyzed nylon. It is a chain polymerization characterized by anionic polymerization. The reaction can reduce the activation energy of the reaction with the help of an activator, so the polymerization temperature is low (160-190°C), the polymerization yield is high, the reaction speed is fast, the average molecular weight, crystallinity, density are high, mechanical strength, stiffness, wear resistance It is larger than ordinary nylon, has good chemical resistance, low water absorption and good dimensional stability. (Dai Yongyan, "Chemical...

AI Technical Summary

Problems solved by technology

[0006] At present, some graphite oxide / polymer composites (including polyvinyl alcohol / graphite oxide, polyethylene oxide / graphite oxide, polydipropylene dimethyl ammonium chloride / graphite oxide, polyvinyl dimethyl ammonium chloride / graphite oxide, etc.) Polyvinyl acetate / graphene oxide) and graphene / polymer composites (including polystyrene / graphene, polyacrylonitrile / graphene, epoxy and polymethylmethacrylate / graphene), (Stankovich S. , Dikin D.A., Dommett D., Kohlhaas K. Etal. Nature, 442, 282-286, 2006. Ramanathan T., Abdala A.A., Stankovich S., Dikin D.A. et al. Nat. Nanotechnol., 3, 327-331, 2008.) However, graphite oxide / cast nylon and graphene / cast nylon nanocomposites and their in-situ polymerization preparation methods have not been reported yet