Continuous flow synthesis of functionalized silver nanoparticles using bifunctional biosurfactants

TitleContinuous flow synthesis of functionalized silver nanoparticles using bifunctional biosurfactants
Publication TypeJournal Article
Year of Publication2010
AuthorsKumar, DVRavi, Kasture, M, Prabhune, A, Ramana, CV, Prasad, BLV, Kulkarni, AA
JournalGreen Chemistry
Volume12
Issue4
Pagination609-615
Date PublishedAPR
ISSN1463-9262
Abstract

Silver nanoparticles were synthesized by continuous flow methods using biosurfactants, namely, oleic acid sophorolipid (OASL) and stearic acid sophorolipid (SASL). Both the sophorolipids can act as reducing and capping agents. The effect of temperature on the completion of nanoparticle formation and the particle growth dynamics (size) were studied in batch mode. While the completion of the reaction using oleic acid sophorolipid needed 20 min, only 5 min were required with the stearic acid sophorolipid as capping and reducing agent. Hence all the continuous flow experiments were carried out using the stearic acid sophorolipid. The continuous flow synthesis of silver nanoparticles was carried out in a stainless steel helical coil and also in a spiral polymeric minichannel reactor. The DLS results show that higher flow rate leads to the formation of bigger and polydisperse particles because of incomplete reactions. Higher residence time allowed the completion of reaction leading to spherical, small and monodisperse particles.

DOI10.1039/b919550e
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

5.472

Divison category: 
Biochemical Sciences
Chemical Engineering & Process Development
Organic Chemistry
Physical and Materials Chemistry