Chemistry of Cotton Fiber
The chemical composition of cotton fibers and the quantity of different constituents vary greatly with the type of plant, soil and climate. Row cotton fiber, after ginning, is essentially composed 94% cellulose.
Chemical composition of cotton fiber:
Constituents Percent
Cellulose 94.0%
Protein 1.3
Paretic substances 1.2
Ash 1.2
Fat and was 0.6
Organic acid, sugar and others 1.7
Although cellulose is the chief component of plant cell-walls, as a naturally occurring material, it contains also a wide verity of other materials in small amounts notably protein, pectin substance es, ash and waxy materials. These are frequently called fiber impurities, but they exert a considerable influence he processing and usefulness of the fiber.
Ash: Potassium Antimony Calcium Magnesium Iron Aluminium etc,
Fat and Waxes: Cotton wax is found on the outer surface of the fiber,. Cotton wax is primarily long chains of fatty acids and alcohols. The cotton wax serves as a protective barrier for the cotton fiber. Liters (based on C15 – C33 fatty acids), Waxy alcohols (C24– C34), hydrocarbons, etc.
Pectin substances: The pectin substances play an important role in plant life. The primary function of the pectin substances is the commenting together of the individual cells that compose4 the plant e.g. prospecting, pectin and pectin acid.
Proteins (also known as polypertides): They are organic compounds made of amino acids arranges in a linear chain and folded into a globour form. The amino acids in a polymer chain are joined together by the peptide bonds between the carboxyl and amino groups of adjacent amino acid residues.
Organic acid and sugar: Organic acids are found