用接触角测量仪分析涂有树脂的铝薄

This sample exhibited an equilibrium water
contact angle of zero degrees, but the
spreading is not instantaneous. The FTÅ200
can measure this spreading time. The
following figures illustrate the drop profile
at various times. The resultant contact angle
and base width is also graphed. Differing
amounts of surfactant in the resin would
cause the drop to spread at different rates.
To do comparative work of this nature, the
drop volume 首ld be standardized to
within, say, 10% on each sample. The pump
forms a pendant drop on the tip which is
allowed to grow until its bottom touches the
surface, at which time the drop detaches
from the tip and forms a sessile drop.