Repetibilidade na Preparação de Membranas de Separação
Burkhardt, H.; Winnisschofer, G. E.; Olivieri, J. C.
Polímeros: Ciência e Tecnologia, vol.2, n1, p.31-33, 1992
Resumo
A vazão e a rejeição ou permeabilidade e seletividade são importantes caracteristicos das membranas poliméricas. Essas dependem intimamente da estrutura microporosa existente na superfície das membranas, determinada pelos parâmetros do processo de preparação. Neste trabalho procurou-se manter constantes as condições experimentais, dentro dos inerentes limites de flutuação, para verificar a repetibilidade do processo e identificar a origem da variação nos resultados das medidas de vazão, através de procedimento estatístico.
Palavras-chave
Membranas Polimérica, Preparação de Membranas
References
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2- GRETHLEIN, H.,-" Astudy on reproducibility of cellulose acetate membranes," Desalination, V12 p, 4560, (1973).
3- MOSEGGARD, P; JONSSON, G.; -"On the reproducibility of asymetric cellulose acetate membranes," Desalination, V 46, p. 313-320. (1983).
4 - AMERICAN SOCIETY FOR TESTING and MATERIALS (ASTM). -"Standard Abbreviations of terms relating to plastic," ASTM D 1600. Philadelphia; (1980), pt. 35, p. 540-541.
5 - AMERICAN SOCIETY FOR TESTING and MATERIALS (ASTM). -"Standard test method for viscosity of cellulose derivatives by ball-drop method".; ASTM D1343. Philadelphia: (1980), pt. 21, p. 84-87.
6 - AMERICAN SOCIETY FOR TESTING and MATERIALS (ASTM). "Standard methods of testing cellulose acetate," ASTM D871. Philadelphia: (1980), pt. 21, p.55-70.
7 - ENCYCLOPEDIA OF POLYMER SCIENCE and TECNOLOGY VOL. 3p. 345, John Wiley, New York (1965).
8 - HURTUBISE, F.G., KRASSIG, H. "Classification of fine structural characteristics in cellulose by infrared spectroscopy," Analytic. Chem., V32, p. 177-181, (1960).
9 - COSTA NETO, P.L. DE O.-"Estatística," São Paulo: Edgard Blucher, (1977). p. 252.
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