Question

What is the effect of Mercerization process ?

• A. Decreases luster.
• B. Decreases dyeability
• C. Increases dyeability
• D. Increases orientation of polymers

Hint:

Mercerization increases luster, strength, and dyeability of cotton. It does not decrease any of these properties. It causes swelling of cotton fiber.

Answer 1

The Correct Option is C

Step 1: Understanding Mercerization: Mercerization is a treatment for cellulosic fibers (typically cotton) with a strong solution of sodium hydroxide (NaOH) under tension.
Step 2: Effects of Mercerization: Mercerization has several effects on cotton: Increased Luster: The fibers swell and become more cylindrical, leading to a smoother surface that reflects light better, increasing luster. So option (a) is incorrect. Increased Strength: The swelling and realignment of cellulose chains improve fiber strength. Increased Dye Uptake (Dyeability): The swelling and increased amorphous regions make the fiber more accessible to dye molecules, leading to deeper and more uniform dyeing. So option (b) is wrong, and (c) is correct. Improved Dimensional Stability: Reduces shrinkage. Decreased orientation of polymers The orientation of the polymer decreases. So (d) is incorrect.