Control has a larger OH peak. This often means more hydrophilic.

Asal Pashabeigi

Less intense absorption of the hydroxyl group band indicates that their amount in the compound is less than in the control sample. Therefore, the test sample is less hydrophilic than the control sample. However, there may not be a proportionality between this indicator and the contact angle. The number of hydroxyl groups indicates the hydration of the compound, and the contact angle indicates the wettability of the solid surface of the substance.