c****y
发帖数: 55 | 1 I sanded and grit-blasted the surface of graphite/epoxy composite to
increase the surface roughness and then used contact angle measurement to
calculate the surface energy . when i got the results and it is totally
weired.
For every sample, the dispersive component of surface energy is around 50 MJ
/M2 while the polar component is only around not bigger than 1 MJ/M2. and i
have repeated my experiments 3 times and i am pretty sure my experiment
processing is good.
i just dont know how come the | r******0
发帖数: 2753 | 2 Roughness can change contact angle. For example, same polymer surfaces with
different roughness may get different contact angles. It may not be a good
idea to calculate surface energy from the contact angles. |
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