Carbon in general is hydrophobic and can be made less hydrophobic or even hydrophilic depending on the amount of oxygen moeities present at the surface. This means that a simple but controlled oxidation will make a carbon fibre much more wettable. You can do this by simple soaking in hydrogen peroxide, nitric acid or sodium hypoclorite for example. You can play with concentration, time and temperature to get a more and more oxidised fibre. The strongest effect is obtained by hot concentrated HNO3, which is able to produce a weight increase of 10 - 15 % in typically half an hour. But this is probably far too much for what you want, and it may make the fibre more fragile.
Alain
Thank you sir
Any effect on other property of carbon fiber if we soaked it in hydrogen peroxide or in nitric acid.
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