dc.contributor | Fonseca, José Luis Cardozo | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/1052318028810878 | |
dc.contributor | | |
dc.contributor | http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4788562T6 | |
dc.contributor | Wanderley Neto, Alcides de Oliveira | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/4789528535524269 | |
dc.contributor | Vasconcelos, Cláudio Lopes de | |
dc.contributor | | |
dc.contributor | http://lattes.cnpq.br/7657769529479698 | |
dc.creator | Morais, Wildson Arcanjo de | |
dc.date.accessioned | 2012-03-20 | |
dc.date.accessioned | 2014-12-17T15:41:55Z | |
dc.date.accessioned | 2022-10-05T23:05:28Z | |
dc.date.available | 2012-03-20 | |
dc.date.available | 2014-12-17T15:41:55Z | |
dc.date.available | 2022-10-05T23:05:28Z | |
dc.date.created | 2012-03-20 | |
dc.date.created | 2014-12-17T15:41:55Z | |
dc.date.issued | 2011-07-20 | |
dc.identifier | MORAIS, Wildson Arcanjo de. Caracterização do processo de gelificação de soluções quitosana utilizando reometria e espalhamento dinâmico da luz. 2011. 77 f. Dissertação (Mestrado em Físico-Química; Química) - Universidade Federal do Rio Grande do Norte, Natal, 2011. | |
dc.identifier | https://repositorio.ufrn.br/jspui/handle/123456789/17649 | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/3946531 | |
dc.description.abstract | Gels consist of soft materials with vast use in several activities, such as in
pharmaceutical industry, food science, and coatings/textile applications. In order to obtain
these materials, the process of gelification, that can be physical (based on physical
interactions) and/or chemical (based on covalent crosslinking), has to be carried out. In this
work we used dynamic light scattering (DLS) and rheometry to monitor the covalent
gelification of chitosan solutions by glutaraldehyde. Intensity correlation function (ICF) data
was obtained from DLS and the exponential stretched Kohrausch-William-Watts function
(KWW) was fitted to them. The parameters of the KWW equation, β, Γ and C were evaluated.
These methods were effective in clarifying the process of sol-gel transition, with the
emergence of non-ergodicity, and determining the range of gelation observed in about 10-20
minutes. The dependence between apparent viscosity on reaction time was used to support the
discussion proposed. | |
dc.publisher | Universidade Federal do Rio Grande do Norte | |
dc.publisher | BR | |
dc.publisher | UFRN | |
dc.publisher | Programa de Pós-Graduação em Química | |
dc.publisher | Físico-Química; Química | |
dc.rights | Acesso Aberto | |
dc.subject | Espalhamento dinâmico da luz | |
dc.subject | Quitosana | |
dc.subject | Tempo de gelificação. | |
dc.subject | Dynamic light scattering | |
dc.subject | Chitosan | |
dc.subject | Gelation time. | |
dc.title | Caracterização do processo de gelificação de soluções quitosana utilizando reometria e espalhamento dinâmico da luz | |
dc.type | masterThesis | |