The exothermic reaction route of a self-heatable conductive ink for rapid processable printed electronics

Nanoscale ◽  
2014 ◽  
Vol 6 (1) ◽  
pp. 630-637 ◽  
Author(s):  
Dong-Youn Shin ◽  
Jin Wook Han ◽  
Sangki Chun
Keyword(s):  
Printed Electronics ◽  
Exothermic Reaction ◽  
Conductive Ink ◽  
Reaction Route

Exothermic and Recursive Reaction of Self-Sinterable Silver Ink for Flexible Electronics

2013 ◽  
Vol 1567 ◽  
Author(s):  
Dong-Youn Shin ◽  
Sangki Chun
Keyword(s):  
Silver Nanoparticles ◽  
Low Temperature ◽  
Flexible Electronics ◽  
Printed Electronics ◽  
Exothermic Reaction ◽  
Conductive Ink ◽  
Crucial Issue ◽  
Polymeric Substrate ◽  
Silver Ink ◽  
Silver Carboxylate

ABSTRACTFor the construction of highly conductive printed electrodes on a polymeric substrate with a low glass transition temperature, the development of a low temperature sinterable conductive ink has been a crucial issue in printed electronics and display applications. In this work, we introduce a novel type of self-sinterable silver ink, whose sintering is triggered at a low temperature and completed with the aid of its own exothermic reaction, and propose its exothermic reaction mechanism. Although individual components of this self-sinterable silver ink, Ag2O and silver carboxylate, exhibit endothermic behaviors, their mixture form shows a strong exothermic reaction when heated at 150 °C. It is found that the dissociated form of the used silver carboxylate contributes to the reduction of Ag2O to Ag through its recursive reaction and produces silver nanoparticles. The major source of an exothermic reaction results from the nucleation and fusion of silver nanoparticles.

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

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.

Sign in / Sign up

Export Citation Format

Share Document