Foaming Behavior of Aqueous Solutions: Containing Hexadecyltrimethylammonium Bromide and Silica Nanoparticles: Analysis of Stability and Interfacial Properties - Softcover

Vishal, Badri; Ghosh, Pallab

Softcover

ISBN 10: 6139910854 ISBN 13: 9786139910854

Publisher: LAP LAMBERT Academic Publishing, 2018

Synopsis

Aqueous foams are of great importance in a large number of applications such as cosmetic items, food products, cleaning agents, and pharmaceuticals. Foams are stabilized by using surfactants and sometimes particles. Their mixture shows a synergetic effect, and therefore, foams are stable for a longer period. Foams are composed of thin liquid films, known as Lamellae. The foam film consists of two air–water interfaces. Therefore, the stability of foams profoundly relies on the stability of the thin liquid films, and consequently on the properties of the air–water interfaces. In this monograph, experimental work was performed on aqueous foams stabilized by a mixture of hexadecyltrimethylammonium bromide (HTAB) and negatively-charged silica nano-particles. The foams and the air–water interfaces were studied by using different techniques. Our key finding was that the foams were more stable at low HTAB concentration in the presence of particles. The presence of the nanoparticles at the air–water interface provided mechanical strength to the foam films and prevented their rupture. This also hindered coalescence of the bubbles, which resulted in a stable foam.

Edition details

• Publisher: LAP LAMBERT Academic Publishing
• Publication date: 2018
• Language: English
• ISBN 10: 6139910854
• ISBN 13: 9786139910854
• Binding: Paperback
• Number of pages: 208