Gelation Mechanism of Resorcinol-Formaldehyde Gels Investigated by Dynamic Light Scattering

Monitoring the gelation mechanism of resorcinol- formaldehyde gels by dynamic light scattering

Xerogels and porous materials for specific applications such as catalyst supports, CO2 capture, pollutant adsorption and selective membrane design require fine control of pore structure, which in turn requires improved understanding of the chemistry and physics of growth, aggregation and gelation processes governing nanostructure formation in these materials. We used time-resolved dynamic light...

Gelation of aqueous pectin solutions: a dynamic light scattering study.

We report the dynamic light scattering study of the gelation of aqueous solutions of the biopolymer, pectin, induced by the addition of calcium chloride. The time correlation function data are analyzed under the framework of the coupling model. As the solution enters the semidilute regime where gelation sets in, the relaxation process shows a stretched exponential behavior. The stretching expon...

Dynamic light scattering from gels in a poor solvent

2014 Photon correlation spectroscopy measurements are reported of the collective motion diffusion coefficient Dc and the longitudinal elastic modulus Egel of polyacrylamide gels in the poor solvent region using a water : methanol (3 : 1 by volume) mixture as solvent. It is shown that the presence of cross-links hinders the movement of polymer self-entanglements, which are characteristic of 03B8...

Entrapment–D-(+)-Glucose Water Nanodroplet: Synthesis and Dynamic Light Scattering

In the present research, the D-(+)-Glucose–confined water nanodroplets with mean size in the range of 6-11 nm were synthesized at D-(+)-Glucose different concentrations by AOT reverse micelles (RMs) method as a function of mass fraction of droplet (MFD) at the constant water-to-surfactant molar ratio ( W=40). The dynamic light scattering of the nano-sized water droplets containing the D-(+)-Glu...

Resorcinol-Formaldehyde (R-F) Resin