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Type: Artigo de periódico
Title: Medidas de tensão superficial pelo método de contagem de gotas: descrição do método e experimentos com tensoativos não-iônicos etoxilados
Title Alternative: Surface tension measurement by drop counting method: method description and experiments with etoxilated non-ionic surfactants
Author: Teixeira Neto, Érico
Malta, Marcos Maziero
Santos, Ronaldo Gonçalves dos
Abstract: Surface tension knowledge of surfactants aqueous solutions is important during amphiphilic molecule manufacturing and new product development, as feedback information to handle synthesis parameters to target performance. Drop counting method is an interesting simplification of drop weight method for surface tension measurements. A simple laboratory measurement device, with capability for temperature control, was assembled to allow investigation of ethoxylated surfactants. The implementation of the method was preceded by a detailed investigation of two factors that may affect the measured surface tension: drop formation velocity and surfactant ethoxylation degree. The limitations of the method are discussed on this basis.
Subject: nonylphenol ethoxylates
ethylene oxide
petrochemical industry
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422009000100037
Date Issue: 1-Jan-2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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