Hydrophobicity

The condition of a substance that shuns water — how far its molecules resist dissolving in water. Hydrophobicity governs how fats behave in doughs and batters, how emulsifiers orient at oil–water interfaces, how proteins fold, and how packaging materials repel moisture. Understanding it is essential for formulating stable emulsions, controlling texture, and designing effective moisture barriers. It also explains why oil and water separate, why fats feel greasy rather than wet, and why hydrophobic packaging films protect dry foods from ambient humidity.