Aug 15, 2015

Hydrophilic, Hydrophobic, and Hygroscopic

Hydrophilic refers to substances that absorb water. A hydrophilic substance will bond, on a molecular level with water.
Hydrophobic materials hate water and repel it.
Hygroscopic refers to the ability of a material to absorb humidity from the air.  A hygroscopic substance will actively attract and absorb water, without bonding. A hygroscope indicates changes in humidity.

Water is hydrophilic (mixes with more water easily) and oils or fats are generally hydrophobic and separate from water, forming an oily layer.

The suffix "philic" means loving or attracted to. The suffix "phobic" means fear or fearful.