XII-B DON BOSCO SCHOOL
To make Cuprammonium Rayon
Threads From Filter Paper
This is to certify that Aakash Narayan, student of Class XII B, Don Bosco School ,Alaknanda has completed the project titled ‘Cuprammonium Rayon Threads from Filter Paper’ during the academic year 2010-2011, towards partial fulfilment of credit for the chemistry practical evaluation of CBSE Board, and submitted satisfactory report, as compiled in the following pages, under my supervision.
This project is absolutely genuine and does not indulge in plagiarism of any kind. The references taken in making this project have been declared at the end of this report.
Ms. Cecilia Manichan
Don Bosco School, Alaknanda
“There are times when silence speaks so much more loudly than words of praise to only as good as belittle a person, whose words do not express, but only put a veneer over true feelings, which are of gratitude at this point of time………………………..””
I would like to express my sincere gratitude to my chemistry teacher Ms. Cecilia Manichan ,for her vital support, guidance and encouragement without which this project would not have come-forth.
I would also like to express my gratitude to the staff of the Department of Chemistry at Don Bosco School for their support during the making of this project.
I would also like to thank my partner ,my friend Gaurab Das Gupta helping me to perform the project.
XII B, Don Bosco School
1) Conical flask (250 ml)
3) Glass rod
4) Beaker (250 ml)
5) Water bath
6) Whatman Filter paper
1) Copper Sulphate(CuSO4 )
2) Caustic Soda Solution(NAOH)
3) Liquor ammonia solution
4) Dilute Sulphuric Acid (H2SO4)
5) Whatman Paper
6) Distilled water (H2O)
Rayon is a cellulose-based synthetic fiber .
it was originally called ‘artificial silk’ or ‘wood silk’, because, it got Developed in an attempt to chemically produce silk.
Rayon is a regenerated fiber.
cellulose is converted to a liquid compound and then back to cellulose in the form of fiber.
cuprammonium rayon is obtained by dissolving cellulose in ammoniacal copper sulphate solution.
The rayon fibers have special characteristics: They are highly absorbent, ❖ Soft and comfortable,
❖ Easy to dye &
❖ Drape well.
Cellulose is nature’s own giant molecule.
It is the fibrous material that every plant makes by baking glucose molecules in long chains, from seaweed to the sequoia; the chains are bound together in the fibers that give plants their shape and strength. Wood is the main source of cellulose. it contains 40% to 50% cellulose.
the substance must be extracted by ‘pulping’. The logs are flaked, and then simmered in chemicals that dissolve the tarry lignin, resins and minerals. The remaining pulp, about 93% cellulose, is dried and rolled into sheets-raw material for paper, rayon and other products.
It can be obtained in two ways:
1. Viscose Process:
Cellulose is soaked in 30% caustic soda solution for about 3 hrs. The alkali...