RESEARCH GROUP
Interfacial Phenomena, Rheology, and Transport Simulation Research Group (FIRST)
ABOUT OUR Group
Its research focuses on the genetic diversity and population structure of biologically important species; the conservation of agriculturally important plant species through genetics and plant biotechnology; genetic improvement; plant biotechnology for crops of agricultural importance; the genetic diversity of microbial communities; hydrocarbon biodegradation; bioprospecting; the taxonomic identification and preservation of microbial collections; microbial genomics; genotoxicological assessment; chemoprevention; and the study of natural photoprotective compounds.
Ronald Alfonso
MERCADO OJEDA
Research Group Director
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RESEARCH Lines
Physicochemical Phenomena at Interfaces and Surfaces
This research line investigates adsorption, wettability, interfacial tension, film stability, and other phenomena occurring at solid–liquid, liquid–liquid, and liquid–gas interfaces. It seeks to understand and control the intermolecular interactions that govern the behavior of multiphase systems.
Formulation and Destabilization of Dispersed Systems
This research line focuses on the design, characterization, and optimization of emulsions, foams, suspensions, and other dispersed systems, as well as on the development of strategies for their stabilization or destabilization according to industrial process requirements.
Asphalt Binders and Modified Bituminous Materials
This research line investigates asphalt binders and bituminous materials through the incorporation of chemical modifiers, polymers, nanoparticles, and recycled materials to enhance their rheological, mechanical, thermal, and durability properties.
Magnetorheology, Electrorheology, and the Rheology of Complex and Interfacial Fluids
This research line investigates the mechanical and microstructural response of complex fluids subjected to mechanical stresses and electric or magnetic fields. It includes the study of viscoelastic properties, nonlinear behavior, and interfacial rheology in multiphase systems.
Nanostructured Materials and Functional Gel Systems
This research line focuses on the development and characterization of nanomaterials, hydrogels, oleogels, and other structured systems with specific functionalities for applications in energy, environment, healthcare, food, and advanced materials.
Multiscale Transport Phenomena Simulation
This research line develops theoretical models and computational tools to describe mass, momentum, and energy transport phenomena from the molecular scale to the process scale, facilitating the understanding and optimization of complex systems.
Sustainability and Safety in Chemical Engineering Processes
This research line promotes the design and operation of safer, more efficient, and more sustainable processes through risk assessment, life cycle assessment, process intensification, circular economy strategies, and the development of technologies with a lower environmental impact.
Senior or Associate Professors
A1 and A-Ranked Articles
Academic Programs
Semillero de Investigación
Nombre del Semillero 1
Nombre del Semillero 2
PRODUCCIÓN Destacada
Producto 1 Tipo de producto | año | Nombre del medio de difusión
Producto 2 Tipo de producto | año | Nombre del medio de difusión
Producto 3 Tipo de producto | año | Nombre del medio de difusión
Producto 4 Tipo de producto | año | Nombre del medio de difusión
Producto 5 Tipo de producto | año | Nombre del medio de difusión
FEATURED Publications
Material bituminoso a partir de lodos aceitosos y/o compuestos de fracciones de hidrocarburos y su método de obtención Patent | 2021 |
Espacio especial para servicios o proyectos
Subtitulo de información adicional si se requiere
SERVICIOS DE Extensión
Lorem fistrum me cago en tus muelas se calle ustée de la pradera me cago en tus muelas apetecan al ataquerl al ataquerl. Está la cosa muy malar a wan fistro apetecan sexuarl. No puedor apetecan por la gloria de mi madre te voy a borrar el cerito no te digo trigo por no llamarte Rodrigor va usté muy cargadoo a wan ahorarr.
EXTENSION Services
CONTACT
Angle
Technique: Tensiometer
Equipment: DataPhysics Pendant Drop Tensiometer
Description: Sessile drop or inverted drop.
AMPLITUDE AND
Frequency Sweep
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Elastic and viscous moduli vs. strain amplitude
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Elastic and viscous moduli vs. frequency sweep
CRITICAL MICELLE
Concentration
Technique: Dynamic Light Scattering (DLS)
Equipment: Litesizer DLS 700
Description: Concentration sweep is performed.
ZETA
Potential
Technique: Electrophoretic Light Scattering (ELS)
Equipment: Litesizer DLS 700
Description: Zeta potential of dispersions in aqueous or organic media.
CREEP
Test
Technique: Transient regime
Equipment: Anton Paar MCR 302 Rheometer
Description: Creep compliance.
CLOUD
Point
Technique: Dynamic Light Scattering (DLS)
Equipment: Litesizer DLS 700
Description: Temperature sweep is performed.
STRAIN
Recovery
Technique: Transient regime
Equipment: Anton Paar MCR 302 Rheometer
Description: Creep recovery.
STRESS
Relaxation
Technique: Transient regime
Equipment: Anton Paar MCR 302 Rheometer
Description: Stress is held constant for a specified period while strain is monitored over time.
RHEOLOGY
Studies
Rheological kinetics monitoring
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Elastic and viscous moduli as a function of time (1-hour measurement).
Rheology under magnetic field
Technique: Rotational/Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Any rheological parameter as a function of the magnetic field.
Rheology under electric field
Technique: Rotational/Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Any rheological parameter as a function of the electric field.
Interfacial rheology using spinning drop
Technique: Tensiometer
Equipment: DataPhysics Spinning Drop Tensiometer
Description: Viscous and elastic moduli as a function of amplitude or frequency, and phase angle.
Interfacial rheology using pendant drop
Technique: Tensiometer
Equipment: DataPhysics Pendant Drop Tensiometer
Description: Viscous and elastic moduli as a function of amplitude or frequency, and phase angle.
AVERAGE PARTICLE/DROPLET SIZE AND
Size Distribution
Technique: Dynamic Light Scattering (DLS)
Equipment: Litesizer DLS 700
Description: Average diameter and size distribution by number, mass, or volume.
SURFACE/INTERFACIAL
Tension
Technique: Tensiometer
Equipment: DataPhysics Spinning Drop Tensiometer
Description: Tension is measured using the spinning-drop method at speeds of up to 10,000 rpm (low interfacial tensions).
Equipment: DataPhysics Pendant Drop Tensiometer
Equipment: DataPhysics Pendant Drop Tensiometer
Description: Tension is measured using the pendant-drop method for medium and high interfacial tensions.
THIXOTROPY
Studies
Rotational thixotropy determination
Technique: Rotational
Equipment: Anton Paar MCR 302 Rheometer
Description: Transient-regime test under an imposed shear rate.
Oscillatory thixotropy determination
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Determined using an oscillatory test by measuring the elastic and viscous moduli as a function of time.
Three-interval thixotropy test (3ITT)
Technique: Rotational/Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Oscillatory/Rotational/Oscillatory test.
YIELD
Stress Determination
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: More accurate determination using an oscillatory test.
VISCOSITY AND
Viscoelasticity
Flow Curve
Technique: Rotational
Equipment: Anton Paar MCR 302 Rheometer
Description: Viscosity or shear stress as a function of shear rate.
Viscosity Index
Technique: Kinematic
Equipment: Anton Paar SVM 1001 Kinematic Viscometer
Description: Measured at 40 and 100 °C.
Viscoelasticity as a function of temperature
Technique: Oscillatory
Equipment: Anton Paar MCR 302 Rheometer
Description: Elastic and viscous moduli as a function of temperature.
Viscosity at a fixed shear rate
Technique: Rotational
Equipment: Anton Paar ViscoQC 100L Viscometer
Description: Apparent viscosity at a fixed shear rate.
Kinematic viscosity
Technique: Kinematic
Equipment: Anton Paar SVM 1001 Kinematic Viscometer
Description: Measured at a constant temperature.
Viscosity as a function of temperature
Technique: Rotational
Equipment: Anton Paar MCR 302 Rheometer
Description: Viscosity sweep as a function of temperature at a constant shear rate or shear stress.
YIELD POINT
Determination
Technique: Rotational
Equipment: Anton Paar MCR 302 Rheometer
Description: Determined using a rotational test.
VISCOSITY CURVE OR
Flow Curve
- Technique: Rotational
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Viscosity or shear stress as a function of shear rate.
VISCOSITY AS A FUNCTION OF
Temperature
- Technique: Rotational
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Viscosity versus temperature sweep at a constant shear rate or constant shear stress.
RHEOLOGY AS A FUNCTION OF
Magnetic Field
- Technique: Rotational/Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Any rheological parameter as a function of the magnetic field.
RHEOLOGY AS A FUNCTION OF
Electric Field
- Technique: Rotational/Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Any rheological parameter as a function of the electric field.
YIELD POINT DETERMINATION
(Yield Point)
- Technique: Rotational
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Determined using a rotational test.
THIXOTROPY
Determination
AMPLITUDE
Sweep
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Elastic and viscous moduli as a function of strain amplitude.
FREQUENCY
Sweep
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Elastic and viscous moduli as a function of frequency.
VISCOELASTICITY AS A FUNCTION OF
Temperature
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Elastic and viscous moduli as a function of temperature.
YIELD STRESS
Determination
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: More accurate determination using an oscillatory test.
THIXOTROPY
Determination
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Determined using an oscillatory test by measuring the elastic and viscous moduli as a function of time.
THIXOTROPY BY
Gold Test
- Technique: Rotational/Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Oscillatory/Rotational/Oscillatory test.
RHEOLOGICAL KINETICS
Monitoring
- Technique: Oscillatory
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Elastic and viscous moduli as a function of time (1-hour measurement).
VISCOSITY AT A FIXED SHEAR
Rate
- Technique: Rotational
- Equipment: Anton Paar ViscoQC 100L Viscometer
- Description: Apparent viscosity at a fixed shear rate.
KINEMATIC
Viscosity
- Technique: Kinematic
- Equipment: Anton Paar SVM 1001 Kinematic Viscometer
- Description: At constant temperature.
VISCOSITY
Index
- Technique: Kinematic
- Equipment: Anton Paar SVM 1001 Kinematic Viscometer
- Description: At 40 °C and 100 °C.
STRESS
Relaxation
- Technique: Transient
- Equipment: Anton Paar MCR 302 Rheometer
- Description: A constant stress is applied for a specified period while the resulting strain is monitored over time.
CREEP
Test
- Technique: Transient
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Determination of creep compliance.
STRAIN
Recovery
- Technique: Transient
- Equipment: Anton Paar MCR 302 Rheometer
- Description: Creep recovery.
SURFACE
Surface/Interfacial Tension
- Technique: Tensiometer
- Equipment: DataPhysics Spinning Drop Tensiometer
- Description: Surface/interfacial tension is measured using the spinning drop method, at speeds of up to 10,000 rpm (low interfacial tensions).
INTERFACIAL
Rheology
- Technique: Tensiometer
- Equipment: DataPhysics Spinning Drop Tensiometer
- Description: Elastic and viscous moduli as a function of amplitude or frequency, including the phase angle.
SURFACE
Surface/Interfacial Tension
- Technique: Tensiometer
- Equipment: DataPhysics Pendant Drop Tensiometer
- Description: Surface/interfacial tension is measured using the pendant drop method, for medium and high surface/interfacial tensions.
CONTACT
Angle
- Technique: Tensiometer
- Equipment: DataPhysics Pendant Drop Tensiometer
- Description: Sessile drop or inverted drop method.
INTERFACIAL
Rheology
- Technique: Tensiometer
- Equipment: DataPhysics Pendant Drop Tensiometer
- Description: Elastic and viscous moduli as a function of amplitude or frequency, including the phase angle.
AVERAGE PARTICLE/DROPLET SIZE AND
Size Distribution
- Technique: Dynamic Light Scattering (DLS)
- Equipment: Litesizer DLS 700
- Description: Average diameter and size distribution based on number, mass, or volume.
ZETA
Potential
CRITICAL MICELLE
Concentration
- Technique: Dynamic Light Scattering (DLS)
- Equipment: Litesizer DLS 700
- Description: Concentration sweep.
CLOUD POINT
(Cloud point)
- Technique: Dynamic Light Scattering (DLS)
- Equipment: Litesizer DLS 700
- Description: Temperature sweep.
OUR Team
Dubán Fabián
GARCÍA NAVAS
PhD in Chemical Engineering
Nombre del miembro del grupo Máximo título académico
Nombre del miembro del grupo Máximo título académico
Nombre del miembro del grupo Máximo título académico
Nombre del miembro del grupo Máximo título académico
Nombre del miembro del grupo Máximo título académico
Nombre del miembro del grupo Máximo título académico
would you like more information? Contact us
Interfacial Phenomena, Rheology, and Transport Simulation Research Group (FIRST)
Phone: +57 (607) 634 4000
Extension: 2525 – 3539
Email: first@uis.edu.co
Campus Central UIS
Bucaramanga, Santander
Carrera 27 calle 9
Escuela de Ingeniería Química, oficina 222
Office Hours
Monday
4:00 p.m. – 5:00 p.m.
Wednesday
3:00 p.m. – 4:00 p.m.