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journal article·2024-10-15

Water–Polymer Slide Electrification in Polyethylene Films Coated with Amphiphilic Compounds and Its Connection to Surface Properties Dependent on Water–Polymer Interactions

María del Mar Cammarata, Luciano Rey, Vanesa Torres, Ricardo Kindsvater, Antonela Cánneva, Mariana D. Sosa, Mirta Fascio, Norma B. D′Accorso, Mario D. Contin, R. Martín Negri

Langmuir· Volume 40· Issue 41
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Source abstract

Abstract

Slide electrification experiments were performed on low-density polyethylene films ( PE ) and PE sprayed with five amphiphilic compounds, including antistatic and slip additives. Drops of aqueous solutions were delivered on the films and after sliding spontaneously acquired a net electrical charge ( Q drop ), which is dependent on the pH and ionic strength. The slide electrification was detected in pristine PE films and those with five additives. An acid–base equilibrium model, based on the adsorption of hydroxides and protons on surface sites, accounted for the dependence of Q drop on pH, allowing recovery of the acid–base equilibrium constants and the density of adsorption sites. The model was modified to account for ionic strength effects through activity factors. The surface conductivity, wettability, and friction coefficients were strongly modified by the additives. However, the observed trends are different from those observed in slide electrification, which better correlated with zeta potential determinations. This suggests that the interaction mechanisms among surface water, the considered additives, and the polymer, which are involved in slide electrification and the generation of zeta potential, are different from those associated with other surface processes involving surface water. Although additives are required for changing surface resistivity, friction coefficients, and wettability, the generation of sliding electrical charges in polyethylene is a spontaneous and highly effective process. For one specific additive, a simultaneous decrease in friction coefficients, zeta potential, and Q drop was observed, assigned to the blockade of hydroxide adsorption sites and water repulsion by the compound.
Source: openalex_inverted_index · Quality: baseline

Research context

Polymers

OpenAlex topics: Advanced Sensor and Energy Harvesting Materials · Conducting polymers and applications · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Instituto de Química Física de Materiales, Ambiente y Energía (INQUIMAE), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)-Universidad de Buenos Aires (UBA), Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires (C1428EGA), Buenos Aires, 1428 Argentina

Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires (C1428EGA), Buenos Aires, 1428 Argentina

Ampacet South America S. R. L. Descartes 3947, Tortuguitas, Provincia de Buenos Aires (B1667AYM), B1667 Argentina

YPF Tecnología S. A. Avda. del Petróleo Argentino, Berisso, Provincia de Buenos Aires, B1925 Argentina

Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), CONICET-UBA, Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires (C1428EGA), Buenos Aires, 1428 Argentina

Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, UBA, Ciudad Universitaria, Pabellón 2, Ciudad Autónoma de Buenos Aires (C1428EGA), Buenos Aires, 1428 Argentina

Departamento de Ciencias Químicas, Cátedra de Química Analítica, Facultad de Farmacia y Bioquímica, UBA, Junín 954, Ciudad Autónoma de Buenos Aires (C1113AAD), Buenos Aires, 1428 Argentina

Funding

Secretar?a de Ciencia y T?cnica, Universidad de Buenos Aires · Consejo Nacional de Investigaciones Cient?ficas y T?cnicas · Ministerio de Ciencia, Tecnolog?a e Innovaci?n · Fondo para la Investigaci?n Cient?fica y Tecnol?gica · Ampacet South America

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