Article
Tackling slip effects in the nonlinear flow properties of gellan fluid gels
Author/s | García González, María del Carmen
![]() ![]() ![]() ![]() ![]() ![]() ![]() Sánchez, Sergio Trujillo-Cayado, Luis Alfonso ![]() ![]() ![]() ![]() ![]() ![]() ![]() Muñoz García, José ![]() ![]() ![]() ![]() ![]() ![]() Alfaro Rodríguez, María del Carmen ![]() ![]() ![]() ![]() ![]() ![]() |
Department | Universidad de Sevilla. Departamento de Ingeniería Química |
Publication Date | 2019-01 |
Deposit Date | 2024-01-25 |
Published in |
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Abstract | Gellan gum is a biopolymer widely used in the food, pharmaceutical, chemical, and agrochemical fields. Its ability to form a strong gel makes it possible to produce fluid gels. These materials present an apparent yield ... Gellan gum is a biopolymer widely used in the food, pharmaceutical, chemical, and agrochemical fields. Its ability to form a strong gel makes it possible to produce fluid gels. These materials present an apparent yield stress, but its value could be influenced by the wall-slip effect when performing the rheological measurements by which it is determined. In this work, the influence of the measuring surface and gap on flow behavior was first determined. The tests revealed the need to use geometries with rough surfaces, although the sample thickness using a parallel plate has no influence. Subsequently, the value of yield stress was obtained by means of creep tests (found to be 4.3 Pa), and, finally, the effect of wall slip on the dynamic viscoelastic behavior was assessed. There was an influence on the extension of the linear viscoelastic region, but not on the viscoelastic functions of the mechanical spectra. |
Funding agencies | Ministerio de Economía y Competitividad (MINECO). España European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) |
Project ID. | CTQ2015-70700-P
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Citation | García González, M.d.C., Sánchez, S., Trujillo-Cayado, L.A., Muñoz García, J. y Alfaro Rodríguez, M.d.C. (2019). Tackling slip effects in the nonlinear flow properties of gellan fluid gels. Journal of Applied Polymer Science, 136 (1), 46900. https://doi.org/10.1002/app.46900. |
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