Please wait.'

Page is loading'


Home  > Raw materials & technologies  > Technologies  > Nanotechnology  > Rheological behaviour of silver nanowire c...

Sunday, 22 September 2019
pdf
Raw materials & technologies, Technologies, Nanotechnology

Rheological behaviour of silver nanowire conductive inks during screen printing

Tuesday, 6 September 2016

The rheological behaviour of silver nanowire (AgNW) suspensions adapted for screen printing inks was investigated by researchers from University of New Hampshire.

Rheological behaviour of silver nanowire conductive inks during screen printing. Source: Sigrid Roßmann/pixelio.de

Rheological behaviour of silver nanowire conductive inks during screen printing. Source: Sigrid Roßmann/pixelio.de

Aqueous silver nanowire inks consisting of AgNW (length of 30 μm, and diameter of 40 and 90 nm), dispersant and binder were formulated.

Rheological behaviour and structure depend on shear and temperature

The effect of AgNW content on the rheological behaviour of the ink and the build-up of ink structure after screen printing were examined as they depend on applied shear and temperature. Rheological measurements under conditions that mimic the screen printing process were done to assess viscoelastic properties induced by flow alignment of the wires and the subsequent recovery of the low shear structure. The Stretched Exponential model (SEmo) was used to model the recovery process after screen printing to obtain the characteristic time of the recovery or build-up process. The characteristic time was determined at several temperatures to obtain the activation energy of recovery. The domination of Brownian motion or non-Brownian motion behaviour can be characterised by a Peclet number, which is the ratio of shear rate to the rotational diffusion coefficient. The Peclet number and the dimensionless concentration of wires were used to assess the recovery mechanism. The steady viscosity at low and high shear rates was also treated by an activation energy analysis.

The study is published in: Journal of Nanoparticle Research, August 2016, 18:249

top of page
Comments (0)
Add Comment

Post comment

You are not logged in

register