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Infrared spectroscopical investigation of cotton subjected to swelling and deswelling treatments
Author(s) -
Åsnes Harald,
Wickman Bengt O.
Publication year - 1966
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1966.070100910
Subject(s) - swelling , thiocyanate , infrared , sodium hydroxide , infrared spectroscopy , potassium thiocyanate , materials science , potassium hydroxide , chemistry , analytical chemistry (journal) , inorganic chemistry , composite material , organic chemistry , physics , optics
The setting of textiles made from cellulosic materials can be done with swelling and deswelling processes. Standard cotton fibers, purified by extraction, have been set in sodium hydroxide solutions with and without additions of thiocyanate salts. Treatments have also been done in zinc chloride and calcium thiocyanate and in a solution of potassium hydroxide in a mixture of butanol and kerosene. After rinsing and drying of the cotton samples, KBr pellets for infrared investigations were produced. Deuteration of the fiber sample for investigation was made in a special apparatus. Single and differential infrared diagrams have been run with and without previous deuteration of the set cotton samples. The infrared maximum of absorption of the OH band changes as a result of the setting treatment. The infrared diagrams show that the setting treatment in alkaline solution gives a broadening of the OH band towards higher and lower wavelengths, which indicates a transfer of the hydrogen bonding energy both to higher and lower energies. The diagrams from the deuterated samples indicate that the strong hydrogen bonds resulting from the setting treatment are partly resistant to deuteration. The results are discussed on the basis of setting and setting reactions.