Rheology of conductive ink flow for printed electronics on a microfluidic chip

2011 ◽  
Vol 53 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Young-Sik Jang ◽  
Simon Song
Keyword(s):  
Microfluidic Chip ◽  
Printed Electronics ◽  
Conductive Ink

Preparation of Conductive Nanosilver Ink and its Application on RFID Tags

2014 ◽  
Vol 904 ◽  
pp. 121-125 ◽  
Author(s):  
Ji Lan Fu ◽  
Ya Ling Li ◽  
Li Xin Mo ◽  
Yu Wang ◽  
Jun Ran ◽  
...  
Keyword(s):  
Flexible Electronics ◽  
Screen Printing ◽  
Surface Resistance ◽  
Large Scale ◽  
Printed Electronics ◽  
Silver Content ◽  
Rfid Tags ◽  
Rheological Characteristics ◽  
Conductive Ink ◽  
New Type

The recent dramatic progress in the printed electronics and flexible electronics, due to the universality of the substrates including the foldable and stretchable substrates, has opened a new prospect in the field of future electronics. In this paper, silver nanospheres in large-scale are synthesized, the nanosilver ink with 63.88% silver content are prepared and a new type of highly conductive and far identify distance RFID tags are manufactured. Especially there are no resin and other additives containing in our conductive ink which satisfy the rheological characteristics and process of screen printing. The tags exhibit the best radiation performance own to there is no high temperature sintering in need. The surface resistance of the tags could be 80 mΩ/, and the identify distance reach to 6.0m. Keywords:silver nanoparticles, conductive ink, RFID tags

Non-aqueous synthesis of silver nanoparticles using tin acetate as a reducing agent for the conductive ink formulation in printed electronics

2011 ◽  
Vol 21 (29) ◽  
pp. 10871 ◽  
Author(s):  
Ravi Shankar ◽  
Lori Groven ◽  
Anthony Amert ◽  
Keith W. Whites ◽  
Jon J. Kellar
Keyword(s):  
Silver Nanoparticles ◽  
Printed Electronics ◽  
Reducing Agent ◽  
Conductive Ink ◽  
Aqueous Synthesis ◽  
Ink Formulation

A numerical study of the ink transfer process for roll-to-roll printing applications

2012 ◽  
Vol 226 (10) ◽  
pp. 2496-2509 ◽  
Author(s):  
Kyunghun Kim ◽  
Taewon Nam ◽  
Yang Na
Keyword(s):  
Newtonian Fluid ◽  
Transfer Process ◽  
Printed Electronics ◽  
Numerical Study ◽  
Measurement Data ◽  
Conductive Ink ◽  
Carreau Model ◽  
Web Handling ◽  
Roll To Roll ◽  
Ink Transfer

An ink transfer process from the printing roll to the moving web was investigated using a computational fluid dynamics technique for the roll-to-roll application in the area of printed electronics. Emphasis was made on the shape of the transferred ink pattern in a realistic configuration. The shear-thinning effect of the conductive ink was treated using a generalized non-Newtonian fluid model. That is, the coefficients of the Carreau model were determined using the fluid dynamic property information of the commercially available conductive ink used in the roll-to-roll process. Also, the web handling speed was matched with that of the typical roll-to-roll process applied in printed electronics. Computational results show that the spatial variation of the shear rate is quite significant in the present configuration; therefore, the Carreau model better predicts the shape of the measurement data than Newtonian fluid in the range of the line thickness of 100–500 µm. It is also noted that the non-uniformity of the transferred ink that is experimentally observed is better predicted by the non-Newtonian model. It is conjectured that the distortion of the shape and the non-uniform distribution of the transferred ink are the prime sources for deterioration in printing quality. However, the fact that web handling speeds of up to 30 mpm (=0.5 m/s) do not significantly aggravate the degree of distortion still supports the main advantage of a cost-effective, continuously running roll-to-roll process in this speed range.

scholarly journals Versatile carbon-loaded shellac ink for disposable printed electronics

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Alexandre Poulin ◽  
Xavier Aeby ◽  
Gilberto Siqueira ◽  
Gustav Nyström
Keyword(s):  
Screen Printing ◽  
Printed Electronics ◽  
Environmental Concern ◽  
Conductive Ink ◽  
Proof Of Concept ◽  
Electronic Components ◽  
Feature Size ◽  
Carbon Particles ◽  
Minimum Feature Size ◽  
Rheology Modifier

AbstractEmerging technologies such as smart packaging are shifting the requirements on electronic components, notably regarding service life, which counts in days instead of years. As a result, standard materials are often not adapted due to economic, environmental or manufacturing considerations. For instance, the use of metal conductive tracks in disposable electronics is a waste of valuable resources and their accumulation in landfills is an environmental concern. In this work, we report a conductive ink made of carbon particles dispersed in a solution of shellac. This natural and water-insoluble resin works as a binder, favourably replacing petroleum-derived polymers. The carbon particles provide electrical conductivity and act as a rheology modifier, creating a printable shear-thinning gel. The ink’s conductivity and sheet resistance are 1000 S m−1 and 15 Ω sq−1, respectively, and remain stable towards moisture. We show that the ink is compatible with several industry-relevant patterning methods such as screen-printing and robocasting, and demonstrate a minimum feature size of 200 μm. As a proof-of-concept, a resistor and a capacitor are printed and used as deformation and proximity sensors, respectively.

Influence of Resins on Properties of Copper Screen Printing Conductive Ink

2012 ◽  
Vol 262 ◽  
pp. 547-550 ◽  
Author(s):  
Xin Ming Fan ◽  
Li Xin Mo ◽  
Wen Bo Li ◽  
Wei Wei Li ◽  
Jun Ran ◽  
...  
Keyword(s):  
Surface Layer ◽  
Screen Printing ◽  
Printed Electronics ◽  
Acrylic Resin ◽  
Electronics Industry ◽  
Conductive Ink ◽  
Conductive Material ◽  
Copper Particles ◽  
Acrylic Resins ◽  
Roll Mill

·Copper conductive inks for screen printing are being given great attention due to their widely application in printed electronics industry. In this study, copper conductive ink used for screen printing, which were grinded by three-roll mill machine, was prepared using the epoxy, polyurethane and acrylic resins as adhesive, the flake copper particles which had a diameter between 20 to 50 μm as conductive material and butly alcohol was chosen as solvent. The viscosity and the thixotropy of the conductive ink were measured by rheometer. The oxidation of the surface layer of copper were removed by submerged in a certain concentration of acid solution and the resistance of the sample was measured after heated at different various temperatures. The results showed that the rheology were better for screen printing by adding the acrylic resin and the minimum conductivity can be reached 1.93×10-3 Ω·cm.

Sign in / Sign up

Export Citation Format

Share Document