Carbon fluoride nanotube and method for making same

[0024] Implementation example 1:

[0025] First, 10 parts of multi-walled carbon nanotubes and 100 parts of polytetrafluoroethylene are uniformly mixed by a ball mill; put into the reactor, sealed and put into the muffle furnace; heated, maintaining the reaction temperature at 475±25℃, and reacting 1~10 After hours, it was cooled to room temperature, the reactor was opened, and after grinding, the fluorinated carbon nanotubes.

[0026] Multi-walled carbon nanotubes can be directly replaced with the same proportion of single-walled carbon nanotubes.

[0027] Polytetrafluoroethylene can be directly replaced with the same proportion of polyperfluoroethylene propylene or polyvinylidene fluoride solid powder.

[0028] A lower reaction temperature can appropriately extend the reaction time; a higher reaction temperature can appropriately shorten the reaction time. As long as the reaction temperature is controlled at 475±25°C and the reaction time is adjusted accordingly within 1-10 hours, carbon nanotubes with a higher fluorination rate can be obtained.

[0029] Implementation example 2

[0030] First, 10 parts of multi-walled carbon nanotubes and 200 parts of copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether are uniformly mixed by a ball mill; put into the reactor, sealed and put into the muffle furnace; heated to maintain the reaction temperature After reacting at 550±50°C for 1-10 hours, cool to room temperature, open the reactor, and mill the fluorocarbon nanotubes.

[0031] Multi-walled carbon nanotubes can be directly replaced with the same proportion of single-walled carbon nanotubes.

[0032] The copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether can be directly substituted with the same proportion of ethylene and tetrafluoroethylene copolymer.

[0033] A lower reaction temperature can appropriately extend the reaction time; a higher reaction temperature can appropriately shorten the reaction time. As long as the reaction temperature is controlled at 550±50°C and the reaction time is adjusted accordingly within 1-10 hours, carbon nanotubes with a higher fluorination rate can be obtained.

[0034] Implementation example 3

[0035] First, 10 parts of multi-walled carbon nanotubes and 300 parts of dodecafluoroheptanol are mixed uniformly by a colloid mill; put into the reactor, sealed and put into the muffle furnace; heated, maintaining the reaction temperature at 150±500C, and reacting 1~ After 10 hours, it was cooled to room temperature, the reactor was opened, and after grinding, the fluorocarbon nanotubes were obtained.

[0036] Multi-walled carbon nanotubes can be directly replaced with the same proportion of single-walled carbon nanotubes.

[0037] Dodecafluoroheptanol can be directly substituted with the same amount of liquid organic fluoride with higher fluorine content such as derivatives of dodecafluoroheptanol.

[0038] A lower reaction temperature can appropriately extend the reaction time; a higher reaction temperature can appropriately shorten the reaction time. As long as the reaction temperature is controlled at 150±50°C and the reaction time is adjusted accordingly within 1-10 hours, carbon nanotubes with a higher fluorination rate can be obtained.

[0039] Table 1 shows the results of XPS analysis before and after fluorination of multi-walled carbon nanotubes and polytetrafluoroethylene as raw materials. As can be seen from Table 1, the fluorination of carbon nanotubes using this method, the concentration of fluorine element can reach 3.59%.

[0040] Table 1 XPS analysis results of carbon nanotubes before and after fluorination

[0041]

[0042] Carbon nanotubes have peculiar electrical properties, good flexibility, good chemical stability, thermal stability and adsorption characteristics, and can be used as ideal reinforcements for composite materials. However, because carbon nanotubes are easy to aggregate into bundles or entangled, and compared with other nano-reinforced materials, their surface is relatively "inert", and their dispersion in common organic solvents is low, which greatly restricts their application performance. the study. On the one hand, the fluorinated carbon nanotubes have certain self-lubricating properties and can be used directly as solid lubricants. On the other hand, it can carry out condensation reaction with nucleophile to introduce different functional groups on the surface of carbon nanotubes to improve the dispersion in the matrix and the strength of interface bonding. Therefore, it is very important to promote the application of carbon nanotubes. The invention uses organic fluorine instead of fluorine gas as a fluorinating agent to react with carbon nanotubes to prepare fluorinated carbon nanotubes, which solves the disadvantages of poor process safety, short equipment service life, and high product cost, and has high safety and equipment use. Long life, low production cost, no explosion, no pollution, etc., suitable for mass production.