Interphase carbon microball base tube type charcoal film and its preparation method
A mesophase carbon microsphere and carbon membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems affecting pore size distribution and pore structure, low carbon content, complex preparation process, etc. , to achieve the effect of developed pore structure, uniform pore size distribution and good separation performance
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Embodiment 1
[0022] The mesocarbon microspheres are sieved to make their average particle size about 15μm, with carboxymethyl cellulose as the binder, and the amount of binder added is the total mass of the mixture (binder + mesocarbon microspheres) 3% of it, add water and mix evenly to make a loose mud, and then directly extrude a wet tubular raw film with an outer diameter of 9mm, an inner diameter of 6mm and a wall thickness of 1.5mm on a plastic extruder at a pressure of 5Mpa, at room temperature Air dry naturally in the air to obtain the original film. Put the original film into a carbonization furnace, under the protection of nitrogen, after raising it from room temperature to 300°C at 1°C / min, then heating it up to 700°C at 3°C / min, and keep the temperature at 700°C for 2 hours. Take it out at room temperature to obtain a tubular carbon membrane. The average outer diameter of the carbon film is 8.00mm and the inner diameter is 5.26mm. Tested by the bubbling (bubble) method, the average ...
Embodiment 2
[0024] The difference between Example 2 and Example 1 is that the final carbonization temperature is 750°C, and the average pore diameter is 0.175 μm.
Embodiment 3
[0026] The difference between Example 3 and Example 1 is that the final carbonization temperature is 800° C., and the average pore diameter is 0.222 μm.
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