Q.94
Which of the following are characteristics of mercerized fibers ?
(A). Stronger
(B). Likely to form nps
(C). Chemical reactivity is decreased
(D). More lustrous
(E). More dyeable
Choose the correct answer from the options given below:
- Structural and Physical Effects of Cotton Mercerization:
- Process: Treating cotton yarn or fabric under tension with $20 - 24\%\ \text{NaOH}$ solution at room temperature.
- Enhanced Properties:
- Stronger: Swelling of cellulose microfibrils increases molecular alignment and circularity, boosting tensile strength by $15 - 25\%$.
- More lustrous: Unravels natural kidney-bean convolutions into smooth cylindrical rods, reflecting light specularly.
- More dyeable: Increases accessible amorphous sorption regions, significantly enhancing dye uptake and color yield.
- Conclusion: (A), (D) and (E) only (Option 3).
Correct option: (3) (A), (D) and (E) only,
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