Whisker-reinforced hydrophobic nylon 66 composite material and preparation method thereof

A composite material and hydrophobic technology, which is applied in the field of nylon engineering plastics, can solve the problems that affect the dimensional stability and strength of products, expansion, nylon 66 is easy to absorb water, etc., and achieve the value of extensive large-scale promotion of production, simple preparation process and low cost Effect

Active Publication Date: 2020-04-21
浙江祥丰新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the current problem that nylon 66 is easy to absorb water and causes swelling and deformation to affect the dimensio

Method used

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  • Whisker-reinforced hydrophobic nylon 66 composite material and preparation method thereof
  • Whisker-reinforced hydrophobic nylon 66 composite material and preparation method thereof
  • Whisker-reinforced hydrophobic nylon 66 composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Disperse calcium sulfate whiskers with a diameter of 1-10 μm and an aspect ratio of 10-20 in an excess mass concentration of 3% polytetrafluoroethylene emulsion and soak for 1 hour, and then use the ALX-2000W centrifugal filter tester at high speed Centrifugal filtration to remove excess emulsion, the centrifugal speed is controlled at 10000rpm, and the centrifugation time is 3min; the obtained calcium sulfate whiskers coated with polytetrafluoroethylene are sent to a high-speed disperser for heating and stirring to disperse, and the high-speed disperser adopts 800rpm The rotating speed makes the material fully disperse in the suspension state, and heats to 100°C to dry and solidify the coated PTFE emulsion to obtain dry calcium sulfate whiskers coated with PTFE;

[0037] (2) Send the calcium sulfate whisker coated with PTFE into NORVA high-energy NGS50 airflow grinder, and the air flow of the airflow grinder is controlled at 500m 3 / h, speed 2000r / min. The heating...

Embodiment 2

[0040] (1) Disperse calcium sulfate whiskers with a diameter of 1-10 μm and an aspect ratio of 10-20 in an excess mass concentration of 3% polytetrafluoroethylene emulsion and soak for 1 hour, and then use the ALX-2000W centrifugal filter tester at high speed Centrifugal filtration to remove excess emulsion, the centrifugal speed is controlled at 10000rpm, and the centrifugation time is 3min; the obtained calcium sulfate whiskers coated with polytetrafluoroethylene are sent to a high-speed disperser for heating and stirring to disperse, and the high-speed disperser adopts 800rpm The rotating speed makes the material fully disperse in the suspension state, and heats to 100°C to dry and solidify the coated PTFE emulsion to obtain dry calcium sulfate whiskers coated with PTFE;

[0041] (2) Send the calcium sulfate whisker coated with PTFE into NORVA high-energy NGS50 airflow grinder, and the air flow of the airflow grinder is controlled at 500m 3 / h, speed 2000r / min. The heating...

Embodiment 3

[0044] (1) Disperse calcium sulfate whiskers with a diameter of 1-10 μm and an aspect ratio of 10-20 in an excess mass concentration of 3% polytetrafluoroethylene emulsion and soak for 1 hour, and then use the ALX-2000W centrifugal filter tester at high speed Centrifugal filtration to remove excess emulsion, the centrifugal speed is controlled at 10000rpm, and the centrifugation time is 3min; the obtained calcium sulfate whiskers coated with polytetrafluoroethylene are sent to a high-speed disperser for heating and stirring to disperse, and the high-speed disperser adopts 800rpm The rotating speed makes the material fully disperse in the suspension state, and heats to 100°C to dry and solidify the coated PTFE emulsion to obtain dry calcium sulfate whiskers coated with PTFE;

[0045] (2) Send the calcium sulfate whisker coated with PTFE into NORVA high-energy NGS50 airflow grinder, and the air flow of the airflow grinder is controlled at 500m 3 / h, speed 2000r / min. The heating...

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Abstract

The invention belongs to the field of nylon engineering plastics, and particularly relates to a whisker-reinforced hydrophobic nylon 66 composite material and a preparation method thereof. According to the invention, polytetrafluoroethylene with hydrophobicity is firmly attached to the surface of a calcium sulfate whisker, and a formed material is used as a filter and dispersed into nylon 66; thehydrophobicity of the polytetrafluoroethylene endows the nylon 66 with a good hydrophobic effect; meanwhile, the polytetrafluoroethylene firmly coats the surface of the calcium sulfate whisker and realizes network dispersion in virtue of the fiber characteristics of the calcium sulfate whiskers, so the problem of separation of the polytetrafluoroethylene is avoided; and the strength of the nylon 66 can be effectively improved by the calcium sulfate whisker. Furthermore, a hydrophobic aid is added into a nylon 66 system, so the material has excellent water and oil repellent characteristics, andnylon 66 can easily form hydrogen bonds after the material is used for nylon 66; and thus, carbonyl and amido groups in nylon 66 can be occupied in advance, thereby preventing water molecules from entering.

Description

technical field [0001] The invention belongs to the field of nylon engineering plastics, in particular to a whisker-reinforced hydrophobic nylon 66 composite material and a preparation method. Background technique [0002] Nylon 66 (PA66) is a polyamide polymer, which was successfully developed by DuPont in 1938. It is a polymer formed by polycondensation of adipic acid and hexamethylenediamine. PA66 has a high degree of crystallinity, and hydrogen can be formed between molecular chains. Bond, strong molecular force, so PA66 has good tensile strength, hardness and resistance to organic solvents, and is widely used in industry. Nylon 66 (PA66) has been widely used in the structural components of automobiles, electrical appliances, general machinery and other products. It has good strength and impact resistance, and it belongs to the category of engineering plastics that is widely used. In recent years, with the rapid development of the automobile industry and rail transit, t...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L51/06C08L83/06C08L83/04C08K13/06C08K9/10C08K7/08C08K3/30C08K3/34C08K7/26C08J5/06
CPCC08J5/06C08K2003/3045C08J2377/06C08J2451/06C08J2483/06C08J2483/04C08K13/06C08K9/10C08K7/08C08K3/346C08K3/34C08K7/26C08K2201/011
Inventor 朱世岳陈亦欣陈湘谢亮
Owner 浙江祥丰新材料科技有限公司
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