Video Experimental Relacionado
Updated: May 1, 2026
10:19
Studying the Effects of Matrix Stiffness on Cellular Function using Acrylamide-based Hydrogels
Published on: August 10, 2010
22.3K
Impacto de la conductividad del agua en la estructura y la dinámica de hinchazón de los hidrogeles reticulados de haz
Elena Mănăilă1, Ion Călina1, Anca Scărișoreanu1
1National Institute for Laser, Plasma and Radiation Physics, 409 Atomistilor St., 077125 Magurele, Romania.
Gels (Basel, Switzerland)
|August 28, 2025
Resumen
Los hidrogeles superabsorbentes mejoran la retención de agua del suelo para la agricultura. Su capacidad de hinchazón es sensible a la conductividad del agua, lo que es prometedor para las regiones afectadas por la sequía.
Área de la Ciencia:
- Ciencias de los materiales
- Ciencias Agrícolas
- Química de los polímeros
Sus antecedentes:
- La degradación del suelo y la sequía limitan la productividad de los cultivos.
- Los hidrogeles superabsorbentes mejoran la retención de agua en el suelo y el crecimiento de las plantas.
Objetivo del estudio:
- Para evaluar los hidrogeles superabsorbentes hechos de alginato de sodio, ácido acrílico (AA) y poli (óxido de etileno) (PEO).
- Para evaluar el rendimiento del hidrogel en ambientes acuosos con una conductividad eléctrica variable (0,05321 μS/cm).
Principales métodos:
- Hidrogeles enlazados por medio de la irradiación por haz de luz eléctrica (12,5 kGy).
- Caracterización mediante el SEM y el FTIR.
- Capacidad de hinchazón y cinética evaluadas en agua de diferente conductividad.
Principales resultados:
- La conductividad del agua tiene un impacto significativo en las propiedades físico-químicas del hidrogel.
- Los grados de hinchazón alcanzaron el 28,400% (5 μS/cm) y el 14,000% (321 μS/cm).
- FTIR y SEM confirmaron cambios estructurales y morfológicos relacionados con la conductividad.
Conclusiones:
- La hinchazón del hidrogel es sensible a la conductividad eléctrica del agua.
- La morfología porosa facilita la difusión del agua.
- Estos hidrogeles son prometedores para la agricultura sostenible.
Videos de Conceptos Relacionados
01:07Cohesion
44.9K
Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a...
On a...
44.9K
03:13Intermolecular Forces
62.9K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
62.9K
01:27Electrostatic Boundary Conditions in Dielectrics
2.1K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's permittivity....
2.1K
01:23Theory of Strong Electrolytes
132
The interionic forces of the strong electrolytes depend on the solvent's dielectric constant, which is the ability of a solvent to store electrical energy, based on its polarizability. and the solution's concentration. In high-dielectric solvents and in dilute solutions, weak electrostatic forces keep ions apart. However, in low-dielectric solvents or concentrated solutions, stronger interionic forces may cause ions to pair up as ionic doublets despite being fully ionized. The theory of strong...
132
01:30The Electrical Double Layer
241
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
241
01:22Effect of Sea Water on Concrete
1.4K
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
1.4K