Membranas assimetricas de acetato de celulose para osmossedimentação e ultrafiltração

AUTOR(ES)
DATA DE PUBLICAÇÃO

1983

RESUMO

The objective of this work is the obtention of membranes with suitable characteristics for osmosedimentation of proteins and other macrosolutes. The influence of several factors on the membranes preparation was investigated: solvent evaporation time, total film thickness, cellulose acetate concentration and solvent mixture composition in the casting solution. The membranes behavior in ultrafiltration experiments was examined. Their permeability and selectivity were determined and their structures were observed by optical and scanning electron microscopy. By appropriate choice of preparation conditions, suitable membranes with different solute molecular weight cut-offs were obtained, which showed good performence in osmosedimentation experiments with blue dextran and gammaglobulin.

ASSUNTO(S)

ultrafiltração membranas (tecnologia) acetado de celulose

Documentos Relacionados