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

A technology of carbon-based nano and composite materials, applied in chemical instruments and methods, conductive materials dispersed in non-conductive inorganic materials, and other chemical processes, to achieve the effects of simple preparation process, environmental friendliness, and easy control

Inactive Publication Date: 2010-12-29
泸州市科华工程塑料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic generator, melt the caprolactam at a temperature of 120°C, add 0.1 part of graphite oxide under the protection of nitrogen, and disperse the After 30 minutes, a graphite oxide caprolactam dispersion was obtained. At a temperature of 130°C and a vacuum of 0.098Mpa, dehydrate for 20 minutes. Then add 0.30 parts of sodium hydroxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.098Mpa. Open the valve to release the vacuum, add 0.5 parts of diphenylmethane diisocyanate (MDI) and 0.3 parts of dimethyl carbonate, stir quickly and evenly, then cast into a mold preheated to 165°C, keep it warm for 1 hour and then cool naturally. Obtain graphite oxide cast nylon nanocomposites.

Embodiment 2

[0036] Add 100 parts of caprolactam melt and 5 parts of graphene into a grinder, and grind at a temperature of 70° C. for 1.5 hours to obtain a graphene caprolactam dispersion. The above dispersion liquid was added into the reaction kettle, and vacuum dehydration was carried out at a temperature of 130° C. for 20 minutes with a vacuum degree of 0.05 MPa. Add 0.25 parts of sodium methoxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.05 MPa. Then add 0.7 parts by weight of toluene diisocyanate (TDI), stir quickly and evenly, then cast into a mold preheated to 160° C., keep warm for 1 hour and then cool naturally. That is, the graphene cast nylon nanocomposite material is obtained.

Embodiment 3

[0038] Add 100 parts of caprolactam into a reaction kettle with an ultrasonic generating device, melt the caprolactam at a temperature of 100°C, add 0.8 parts of graphite oxide under the protection of nitrogen, and disperse the After 30 minutes, a graphite oxide caprolactam dispersion was obtained. At a temperature of 130°C and a vacuum of 0.094Mpa, dehydrate for 20 minutes. Then add 0.40 part of sodium hydroxide and 0.20 part of sodium methoxide as a catalyst, and continue vacuum dehydration for 30 minutes at a vacuum degree of 0.094 Mpa. Open the valve to release the vacuum, add 0.5 parts of acetyl caprolactam, stir quickly and evenly, then cast it into a mold preheated to 165°C, keep it warm for 1 hour and then cool naturally. Obtain graphite oxide cast nylon nanocomposites.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K9/04C08K3/04C08G69/16H01B1/24C09K3/14
Inventor 赵明久夏和生费国霞战艳虎钟欣芮宣隽
Owner 泸州市科华工程塑料有限公司
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