Cellulose swelling by aprotic and protic solvents: What are the similarities and differences?
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2008
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Resumo |
The swelling of microcrystalline, native and mercerized cotton and eucalyptus celluloses by 16 aprotic solvents was investigated. The number of moles of solvent/anhydroglucose unit, nSw, correlates well with solvent molar volume, basicity and dipolarity/polarizability. Swelling is sensitive to cellulose crystallite size, surface area and the presence of its chains in parallel or anti-parallel arrangements. Use of solvatochromic parameters is a superior alternative to the use of other descriptors, such as Hildebrand`s solubility parameters and Gutmann`s donor numbers. The calculated nSw for 28 protic and aprotic solvents correlated well with their experimental counterparts, although hydrogen bond donation by the solvent was not included. |
Identificador |
MACROMOLECULAR CHEMISTRY AND PHYSICS, v.209, n.12, p.1240-1254, 2008 1022-1352 http://producao.usp.br/handle/BDPI/31396 10.1002/macp.200800021 |
Idioma(s) |
eng |
Publicador |
WILEY-V C H VERLAG GMBH |
Relação |
Macromolecular Chemistry and Physics |
Direitos |
restrictedAccess Copyright WILEY-V C H VERLAG GMBH |
Palavras-Chave | #cellulose #fibers #structure-property relations #swelling #DIMETHYL-SULFOXIDE #ORGANIC LIQUIDS #X-RAY #NATIVE CELLULOSE #COTTON FIBERS #WATER #PARAMETERS #POLARITY #SYSTEMS #BINARY #Polymer Science |
Tipo |
article original article publishedVersion |