Preparation method of nanometer SiO2/nylon 6 nanometer composite material

A nano-composite material and composite material technology, applied in the field of preparation of nano-SiO2/nylon 6 nano-composite materials, can solve problems such as the inability to realize the surface modification of primary particles of nanoparticles and affect the full expression of nano-characteristics, and achieve excellent mechanical properties, Improved compatibility, easy-to-control effects

Active Publication Date: 2012-06-27
河南海博瑞硅材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But in this kind of processing method, nano-SiO 2 In the process of synthesis or surface treatment, partial agglomeration or aggregation often occurs, so the modification of the surface of the original nanoparticle particles cannot be realized, which affects the full expression of its nanometer characteristics.

Method used

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  • Preparation method of nanometer SiO2/nylon 6 nanometer composite material
  • Preparation method of nanometer SiO2/nylon 6 nanometer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Add 100g of caprolactam, 2.0ml of water and 1.0g of adipic acid into a 250ml three-neck flask, heat it at 100°C to melt it, after the caprolactam is completely melted, start the stirring device and add 0.2% DNS-3 type of caprolactam nano-SiO 2 After stirring for 30 minutes, the temperature was raised to 200° C. for 3 hours under normal pressure, and then the temperature was slowly raised to 260° C. for 2 hours under normal pressure to obtain a composite material prepolymer. Polymerize the prepolymer at a temperature of 260°C and a pressure drop from -0.01 to -0.06MPa, control the temperature of the distillate to not exceed 110°C, remove the moisture in the reaction system, and wait until the temperature of the distillate drops to 60°C Adjust the pressure from -0.06 to -0.08MPa, react for 0.5h, and remove small molecular substances in the reaction system. The decompression process lasts for 1 hour to obtain nano-SiO 2 / Nylon 6 composite material, denoted as PD3-0.2. ...

Embodiment 2

[0030] Add 100g of caprolactam, 2.0ml of water and 1.0g of adipic acid into a 250ml three-necked flask, heat it to melt, raise the temperature to 200°C for 3 hours under normal pressure, and add 0.5% of the mass of caprolactam RNS-A type nano-SiO 2 After stirring evenly, adjust the temperature to slowly rise to 260°C under normal pressure and react for 2 hours to obtain a composite material prepolymer. Polymerize the prepolymer at a temperature of 260°C, adjust the pressure from -0.01 to -0.06MPa during the process, control the temperature of the distillate to not exceed 110°C, remove the water in the reaction system, and wait until the temperature of the distillate drops to Adjust the pressure from -0.06 to -0.08MPa at 60°C, react for 0.5h, and remove small molecular substances in the reaction system. The decompression process lasts for 1 hour to obtain nano-SiO 2 / Nylon 6 composite material, denoted as PRAM-0.5. Nano-SiO extracted from composite materials 2 (CRA) and pri...

Embodiment 3

[0032] Add 100g of caprolactam, 1.5ml of water and 2.2g of aminocaproic acid into a 250ml three-neck flask, and heat it at 100°C to melt it. After the caprolactam is completely melted, start the stirring device and raise the temperature to 210°C, react at normal pressure for 4 hours, add 2% RNS-E nano-SiO 2After stirring for 30 minutes, adjust the temperature to slowly rise to 270° C. and react for 2 hours under normal pressure to obtain a composite material prepolymer. Polymerize the prepolymer at a temperature of 270°C, adjust the pressure during the process from -0.01 to -0.06MPa, control the temperature of the distillate to not exceed 110°C, remove the moisture in the reaction system, and wait until the temperature of the distillate drops to 60°C Adjust the pressure from -0.06 to -0.08MPa, react for 0.5h, and remove small molecular substances in the reaction system. The decompression process lasts for 1 hour to obtain nano-SiO 2 / Nylon 6 composite.

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Abstract

The invention belongs to the technical field of materials, in particular to a preparation method of a nanometer SiO2 / nylon 6 nanometer composite material, which comprises the following steps: mixing caprolactam, water and additives; heating the mixture to a fused state; raising the temperature of fused reaction products for reaction; adding nanometer SiO2; uniformly stirring the mixture to obtaincomposite material preformed polymers; and then, carrying out pressure reduction polymerization to obtain the composite material. The invention adopts an in-situ polymerization method, improves the compatibility of the nanometer SiO2 and nylon 6, and obtains the nanometer SiO2 / nylon 6 nanometer composite materials with more excellent performance. The high-purity nylon 6 has the excellent mechanical performance and heat performance, the process is stable, simple and convenient, and can be easily controlled, and the invention is suitable for large-scale industrial production.

Description

(1) Technical field [0001] The invention belongs to the field of material technology, in particular to a nano-SiO 2 / Nylon 6 nanocomposite preparation method. (2) Background technology [0002] Because nylon has excellent mechanical and thermal properties, its consumption ranks first among the top five engineering plastics in the world. Nylon 6 is one of the main varieties of nylon plastics. With the high performance of electronic and electrical equipment and the acceleration of the lightweight process of mechanical equipment, the demand for nylon will be higher and greater. Especially as a structural material, nylon has raised requirements for its strength, heat resistance, and cold resistance. Very demanding. Therefore, some properties of nylon must be improved through modification to expand its application field. With the continuous deepening and development of nanotechnology, nylon nanocomposites have become a research hotspot, among which nano-SiO 2 Nylon nanocompo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/42
Inventor 张治军李小红陈方飞方秀苇李庆华
Owner 河南海博瑞硅材料科技有限公司
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