Studies on surface tension of poly(vinyl alcohol): Effect of concentration, temperature, and addition of chaotropic agents

Abstract

ABSTRACT:It is generally considered that the H-bonds are responsible for the stabilization of network of PVA in water. The major types of intermolecular interactions from inorganic salts are responsible for the network of poly(vinyl alcohol) (PVA) and water, which ruptures the multiple Hbonds between the -OH groups of the polymer chains; therefore, various ions possessing abilities to affect these bonds result in salting out. It has been suggested that water molecules in the region of ionic hydration spheres must have strong orientation preferences, which could considerably restrict their ability to reorient and form hydration shells around nearby nonpolar solutes and thus affect the microstructure. In this article, our primary objective was to study the variation of surface tension, as it reflects the change in short-range forces. Apart from this, we have also studied the surface tension behavior with the variation of concentration and temperature for different molecular weights of PVA.

Synthesis of quantum-confined CdS nanotubes

“…PVA is a surface active and water soluble polymer. Although, it does not take part in the chemical reaction, its addition increases viscosity (Briscoe et al 2000) and decreases surface tension (Bhattacharya and Ray 2004) of the solution.…”

Pentachlorophenol removal from water using surfactant-enhanced filtration through low-pressure thin film composite membranes

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“…The statistical accumulation in the surface of molecules with weaker fields results in a lowering of surface free energy. 26 In Fig. 3, the silhouettes of PVA, PVA/5%MFC and PVA/10%MFC of droplets on Bioglass H substrates are shown.…”