Volume 19
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Panwar, K., Jassal, M., & Agrawal, A. K. (2015). In situ synthesis of Ag–SiO2 Janus particles with epoxy functionality for textile applications. Particuology, 19, 107–112. https://doi.org/10.1016/j.partic.2014.06.007
In situ synthesis of Ag–SiO2 Janus particles with epoxy functionality for textile applications
Kamlesh Panwar, Manjeet Jassal *, Ashwini K. Agrawal *
SMITA Research Labs, Department of Textile Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110016, India
10.1016/j.partic.2014.06.007
Volume 19, April 2015, Pages 107-112
Received 8 January 2014, Revised 18 June 2014, Accepted 21 June 2014, Available online 11 October 2014.
E-mail: manjeetjassal@gmail.com; manjeet.jassal@smita-iitd.com

Highlights

• Ag–SiO2 Janus particles were prepared by Pickering emulsion method via low temperature chemical reduction method.

• The synthesized Janus particles possess functionalities suitable for textile applications.

• Janus particles may overcome several drawbacks of direct application of AgNPs on textiles.


Abstract

A facile method for the synthesis of silver–silica (Ag–SiO2) Janus particles with functionalities suitable for textile applications is reported. Silica nanoparticles prepared by the Stöber method were functionalized with epoxy, amine, and thiol groups, which were confirmed by Fourier transform infrared analysis. The functionalized silica nanoparticles were used to produce Pickering emulsions, and the exposed surface was used for the attachment of silver nanoparticles (AgNPs) via the low-temperature chemical reduction method. The morphology and structure of the Ag–SiO2 Janus particles were characterized by scanning electron microscopy, scanning transmission electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray analysis, and UV–vis spectroscopy. Because of their specific functionalities, these Ag–SiO2 Janus particles are proposed for applications on textile substrates, as they can overcome several drawbacks of direct application of AgNPs on textiles, such as leaching, agglomeration, and instability during storage.

Graphical abstract
Keywords
Ag–SiO2 Janus particles; Pickering emulsion; Textile applications