Holidaygomework
Aim To prepare a sample of cuprammonium rayon threads from filter paper
Apparatus Required
a) Conical flask (preferably 250 ml) b) Funnel
c) Glass rod
d) Beaker (preferably 250 ml)
e) Water bath
f) Filter paper (Whatman paper or ordinary filter paper sheets. Preferably, Whatman)
Chemicals Required a) CuSO4
b) NaOH solution c) Liquor ammonia solution
d) Dilute H2SO4
e) Whatman Paper
f) Distilled H2O
Background
Rayon is a synthetic fiber produced from cellulose. Developed in an attempt to produce silk chemically, it was originally called artificial silk or wood silk. Rayon is a regenerated fiber, because cellulose is converted to a liquid compound and then back to cellulose in the form of fiber.
For example, cuprammonium rayon is made by dissolving cellulose in an ammoniacal copper sulphate solution.
The characteristics of rayon fibers are:
s They are highly absorbent,
s Soft and comfortable,
s Easy to dye
s Drape well.
Introduction
Rayon is a fiber produced from cellulose. It was the first man-made fiber, but it is not considered synthetic in the sense that petroleum-based fibers such as nylon or polyester are. It was originally called artificial silk and was developed in the late 1800s in France. Today it is made from the cellulose extracted from wood pulp.
The fabric made from Rayon fibers is similar in absorbency, breathability and drape to natural fabrics like cotton and linen.
You can make rayon in the laboratory as a chemistry exercise, but you will not be able to use the results to make fabric.
Cellulose is nature’s own giant molecule. It is the fibrous material that every plant from seaweed to the sequoia makes by baking glucose molecules in long chains; the chains are bound together in the fibers that give plants their shape and strength. Wood has now become the main source of cellulose. Since it contains only 40% to 50% cellulose, the
Apparatus Required
a) Conical flask (preferably 250 ml) b) Funnel
c) Glass rod
d) Beaker (preferably 250 ml)
e) Water bath
f) Filter paper (Whatman paper or ordinary filter paper sheets. Preferably, Whatman)
Chemicals Required a) CuSO4
b) NaOH solution c) Liquor ammonia solution
d) Dilute H2SO4
e) Whatman Paper
f) Distilled H2O
Background
Rayon is a synthetic fiber produced from cellulose. Developed in an attempt to produce silk chemically, it was originally called artificial silk or wood silk. Rayon is a regenerated fiber, because cellulose is converted to a liquid compound and then back to cellulose in the form of fiber.
For example, cuprammonium rayon is made by dissolving cellulose in an ammoniacal copper sulphate solution.
The characteristics of rayon fibers are:
s They are highly absorbent,
s Soft and comfortable,
s Easy to dye
s Drape well.
Introduction
Rayon is a fiber produced from cellulose. It was the first man-made fiber, but it is not considered synthetic in the sense that petroleum-based fibers such as nylon or polyester are. It was originally called artificial silk and was developed in the late 1800s in France. Today it is made from the cellulose extracted from wood pulp.
The fabric made from Rayon fibers is similar in absorbency, breathability and drape to natural fabrics like cotton and linen.
You can make rayon in the laboratory as a chemistry exercise, but you will not be able to use the results to make fabric.
Cellulose is nature’s own giant molecule. It is the fibrous material that every plant from seaweed to the sequoia makes by baking glucose molecules in long chains; the chains are bound together in the fibers that give plants their shape and strength. Wood has now become the main source of cellulose. Since it contains only 40% to 50% cellulose, the