Fine structural changes in native and mercerized fibrous cellulose brought about by ethylenediamine and methyl alcohol

Autor:	N. B. Patil, Sanjeev R. Shukla, S. Sreenivasan, P. K. Chidambareswaran, H. T. Lokhande
Rok vydání:	1978
Předmět:	Materials science Polymers and Plastics Alcohol Hydrochloric acid Ethylenediamine General Chemistry Crystal structure Alkali metal Surfaces Coatings and Films Ramie chemistry.chemical_compound chemistry Polymer chemistry Materials Chemistry medicine Swelling medicine.symptom Cellulose
Zdroj:	Journal of Applied Polymer Science. 22:3089-3099
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1978.070221105
Popis:	X-Ray diffraction (XRD) studies were made on native as well as mercerized ramie and cotton fibers after swelling them in ethylenediamine (EDA) solutions and washing out the swelling agent using methyl alcohol (MeOH). These treatments are shown to convert the cellulose I and II lattices into cellulose IIII and IIIII type lattices, respectively. Treatment of the IIII and IIIII samples in boiling water or hydrochloric acid results in reconversions of their crystal lattices into the respective parent types. Alkali treatment causes a III II type conversion. Studies using alkali-swollen fibers as well as fibers of different lateral order as starting materials indicate the importance of the structural organization in the cellulosic materials in the production of the cellulose III lattices. Possible mechanisms involved in the lattice transformations in cellulose brought about by the EDA and MeOH treatments are discussed.
Databáze:	OpenAIRE
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