I found a paper about grafting silica nanomaterial to carbon fiber.
Shortly, 1) CF-COOH is made. 2) With a reflux reaction (at 50C, 4h), CF-COOH reacts with solvent including silica nanomaterial. 3) CF-CO-silica is made.
The silica nanomaterial has -OH functional group. So, it reacts with -COOH, and CF-CO-Silica is synthesized.
I want to apply this method to carbon nanomaterial, ex) cnt, go, ..
Then, how can I make the experimental setup ??
For example, ??g of CNT-COOH in ?? ml of ethanol & ??g of silica in ?? ml of ethanol have a reflux reaction
at 50C, reaction time >4h.
I can set the reaction time or tempearture from my reference paper. (CF-g-silica)
However, I don't know the amount of CNT and silica... for a proper reflux reaction and grafting.
I ask for your help.
Functional groups retain their properties in an organic compound. The properties of organic compounds are determined by the properties of functional groups. This is the law of Butlerov-Morkovnikov. Carbon fiber (CF) and and tubes (CT) are no exception. Therefore, you can change the COOH group and perform reactions with it. For example, you can get the a chloranhydride -COCl. See the conditions for its receipt, for example, with phosphorus pentachloride. Then carry out the oxidation of another carbon compound and then make the reaction to obtain the anhydride:
СF-COCl + HOOC-TC = CF-CO-O-CO-TC +HCl
Sharma, M., Gao, S., Mäder, E., Sharma, H., Wei, L.Y. and Bijwe, J., 2014. Carbon fiber surfaces and composite interphases. Composites Science and Technology, 102, pp.35-50.
A few years ago I successfully grafted various functionalities to carbon fibers and carbon nanotubes using water soluble free radical initiators, e.g. 2,2′-Azo-bis(2-amidinopropane) dihydrochloride (AAPH). The reactions are quick and do not require organic solvents. You can use this approach to graft- functionalize you carbonaceous materials with anchors of choice.
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