In situ synthesis of Ag–SiO2 Janus particles with epoxy functionality for textile applications--颗粒学报PARTICUOLOGY

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–SiO₂Janus 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

文章导读