Effect of amplitude and pulse in low frequency ultrasound on oil/water emulsions

The application of ultrasound within advanced or emerging technologies requires selecting parameters that depend on the target application. This study evaluated pulse and amplitude parameters of oil/water emulsions (20:80% w/w) using low frequency probe ultrasound equipment (20 KHz). A categorical multilevel factorial design was used with Design Expert® in which the following pulse treatments were defined: continuous, pulse 20:20 (on:off) and pulse 30:30 (on:off), for five minutes. Six amplitudes (30, 36, 42, 48, 54 and 60 μm) were evaluated for the following response variables: separation of phases in emulsion, temperature and accumulated power. The results showed that the best condition to obtain an emulsion with less phase separation was the 20:20 (on:off) treatment with an amplitude of 42 μm. The ultrasound probe application parameters that were obtained will enable the design of stable products from low-fat emulsions.

• Autores: Cabrera-Trujillo, María Alejandra; Sotelo-Díaz, Luz Indira; Quintanilla-Carvajal, María Ximena
• Tipo de recurso: Article of journal
• Fecha de publicación: 2016
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/60482
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/60482; http://bdigital.unal.edu.co/58814/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; Ultrasound probe; low frequency; emulsion; pulse; amplitude; phase separation; Sonda de ultrasonido; baja frecuencia; emulsión; pulsación; amplitud; separación de fases
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional