Eco-Friendly Screen-Printing Inks of Gadolinia Doped Ceria

2010 ◽  
Vol 7 (5) ◽  
Author(s):  
Alessandra Sanson ◽  
Edoardo Roncari ◽  
Stefano Boldrini ◽  
Patrizia Mangifesta ◽  
Lioudmila Doubova
Keyword(s):  
Screen Printing ◽  
Low Cost ◽  
Tape Casting ◽  
Health And Safety ◽  
Doped Ceria ◽  
Safety Issues ◽  
Free Film ◽  
Water Based ◽  
Printing Inks ◽  
The Right

Gadolina doped ceria (GDC) is a promising electrolyte for intermediate temperature solid oxide fuel cells (IT-SOFC). Dense layers of this material can be economically deposited by screen printing. However, the inks for this technique generally use organic compounds that can raise health and safety issues, as well as economical issues. In order to obtain a low-cost alternative to the generally accepted organic-based ink, four different blends of binders were considered to prepare water-based GDC inks. The systems were deposited onto green NiO/GDC anodes produced by tape casting and treated at 1673 K for 4 h. By choosing the right combination of solvents and binders, it was possible to obtain a dense crack-free film of GDC from a water-based system.

scholarly journals Molecularly Imprinted Polymer-Based Sensors for Priority Pollutants

Sensors ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2406
Author(s):  
Mashaalah Zarejousheghani ◽  
Parvaneh Rahimi ◽  
Helko Borsdorf ◽  
Stefan Zimmermann ◽  
Yvonne Joseph
Keyword(s):  
Environmental Protection Agency ◽  
Selective Adsorption ◽  
Low Cost ◽  
Health And Safety ◽  
Priority Pollutants ◽  
Molecularly Imprinted ◽  
Innovative Strategies ◽  
Safety Issues ◽  
Long Term Stability ◽  
Wide Range

Globally, there is growing concern about the health risks of water and air pollution. The U.S. Environmental Protection Agency (EPA) has developed a list of priority pollutants containing 129 different chemical compounds. All of these chemicals are of significant interest due to their serious health and safety issues. Permanent exposure to some concentrations of these chemicals can cause severe and irrecoverable health effects, which can be easily prevented by their early identification. Molecularly imprinted polymers (MIPs) offer great potential for selective adsorption of chemicals from water and air samples. These selective artificial bio(mimetic) receptors are promising candidates for modification of sensors, especially disposable sensors, due to their low-cost, long-term stability, ease of engineering, simplicity of production and their applicability for a wide range of targets. Herein, innovative strategies used to develop MIP-based sensors for EPA priority pollutants will be reviewed.

A New Black Water Based Ink Prepared by Chinese Traditional Materials for Screen Printing Ancient Books

2011 ◽  
Vol 380 ◽  
pp. 69-72
Author(s):  
Li Xia Huo ◽  
Shi Yong Luo ◽  
Yong Hao ◽  
Wen Cai Xu ◽  
Zai Zhu Ma
Keyword(s):  
Ming Dynasty ◽  
Screen Printing ◽  
Shanxi Province ◽  
Chemical Reagents ◽  
Black Water ◽  
Water Based ◽  
Printing Inks ◽  
Modern Chemical ◽  
The Temple ◽  
Bone Glue

Ink is one of “the four treasures in the study”. Inks prepared by the traditional materials is usually in the form of Chinese ink and ink stick, which are unsuitable for the modern printing technology such as screen printing, offset print, gravure or flexo printing. On the other hand, modern commodity printing inks most prepared by modern chemical pigments and chemical reagents, which would emit a certain amount of pollutants. Reproduction of Chinese ancient books, if printed by using modern commodity printing inks, would lost their lasting ancient charm such as antique, quaint, hoary, vintage, archaic, etc. In the present research, a new black water based ink is prepared by Chinese traditional materials such as, Chinese wood oil soot, bone glue, borneol, musk, pepper, etc. not including any modern chemical reagents which could cause pollution of the environment. The viscosity, fineness and rheology property of the ink were characterized. As an application example, the ink is used to duplicate the Tripitaka book sample by screen printing on Xuan papers. The original is the Tripitaka printed in the Ming Dynasty and from the temple of Wutaishan, Shanxi Province, China. The Reproduce is lasting ancient charm and durable.

High performance Ni–Fe alloy supported SOFCs fabricated by low cost tape casting-screen printing-cofiring process

2014 ◽  
Vol 39 (34) ◽  
pp. 19747-19752 ◽  
Author(s):  
Kai Li ◽  
Xin Wang ◽  
Lichao Jia ◽  
Dong Yan ◽  
Jian Pu ◽  
...  
Keyword(s):  
High Performance ◽  
Screen Printing ◽  
Low Cost ◽  
Tape Casting

scholarly journals “Covid Just Amplified the Cracks of the System”: Working as a Frontline Health Worker during the COVID-19 Pandemic

2021 ◽  
Vol 18 (19) ◽  
pp. 10178
Author(s):  
Karen Willis ◽  
Paulina Ezer ◽  
Sophie Lewis ◽  
Marie Bismark ◽  
Natasha Smallwood
Keyword(s):  
Healthcare Workers ◽  
Health Workers ◽  
Qualitative Content Analysis ◽  
Health And Safety ◽  
Free Text ◽  
Safety Issues ◽  
Health Workforce Retention ◽  
Workforce Retention ◽  
Workplace Challenges ◽  
The Right

The COVID-19 pandemic has intensified existing workplace stresses and created new challenges for people working on the healthcare frontline, including rapid workplace changes and increasing uncertainty at work, along with fear of contracting the virus. The purpose of this study is to examine the workplace challenges described by Australian frontline health workers during the pandemic. Drawing on a national online anonymous survey of 9518 healthcare workers, we analysed free-text responses to the question: “What did you find to be the main challenges that you faced during the pandemic?” A qualitative content analysis was undertaken. We identified five key themes relating to participant experiences of workplace challenges. These were: Work-life imbalance; Following orders or caring for patients; Unpredictability, disruption, and inconsistency at work; The right to be safe at work; and (Un)preparedness in the workplace. We argue that working during the COVID-19 pandemic illuminated existing occupational health and safety issues that have serious implications for job satisfaction, health workforce retention, and ultimately, patient care.

Alumina Matrix Composites Produced by Water-Based Tape Casting

2014 ◽  
Vol 775-776 ◽  
pp. 562-565
Author(s):  
Tatiane Mattos Amadio ◽  
João B. Rodrigues Neto ◽  
Dachamir Hotza
Keyword(s):  
Low Cost ◽  
Tape Casting ◽  
Casting Process ◽  
Mechanical Resistance ◽  
Matrix Composites ◽  
Polycrystalline Alumina ◽  
Water Based ◽  
Alumina Fibers ◽  
Alumina Composite ◽  
Efficient Option

This work aimed to develop an alumina composite reinforced with polycrystalline alumina fibers to increase the mechanical properties of the product. A water-based processing was carried out, replacing the use of toxic and flammable organic solvents. The forming technique used was tape casting, which in addition to reliability and low cost, enables to make thin, flat tapes. The parameters for the tape casting process were: gap between the blades of 350 μm and casting speed of 12 cm/min. The process was optimized through a rheological study and alumina suspension with 50 wt.% solids was used. The slurry showed a pseudoplastic behavior and a high value of thixotropy. Several methods for separation and processing of the fibers were tested and a scattering using a specially designed support was the most efficient option. The tapes were thermopressed at 65°C and 30 MPa. The tensile test of green tapes showed a significant increase of the mechanical resistance for fiber-reinforced tapes, which was also dependent on fiber orientation.

scholarly journals Interface-exfoliated graphene-based conductive screen-printing inks: low-loading, low-cost, and additive-free

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Feiyang Chen ◽  
Deepthi Varghese ◽  
Sean T. McDermott ◽  
Ian George ◽  
Lijiang Geng ◽  
...  
Keyword(s):  
Screen Printing ◽  
Low Cost ◽  
Oil Emulsion ◽  
Exfoliated Graphene ◽  
Printing Inks ◽  
Trapping Method ◽  
Paper Diagnostics ◽  
Water In Oil Emulsion ◽  
Harsh Conditions ◽  
Environmentally Friendly Approach

Abstract Paper diagnostics are of growing interest due to their low cost and easy accessibility. Conductive inks, necessary for manufacturing the next generation diagnostic devices, currently face challenges such as high cost, high sintering temperatures, or harsh conditions required to remove stabilizers. Here we report an effective, inexpensive, and environmentally friendly approach to graphene ink that is suitable for screen printing onto paper substrates. The ink formulation contains only pristine graphite, water, and non-toxic alkanes formed by an interfacial trapping method in which graphite spontaneously exfoliates to graphene. The result is a viscous graphene stabilized water-in-oil emulsion-based ink. This ink does not require sintering, but drying at 90 °C or brief microwaving can improve the conductivity. The production requires only 40 s of shaking to form the emulsion. The sheet resistance of the ink is approximately 600 Ω/sq at a thickness of less than 6 µm, and the ink can be stabilized by as little as 1 wt% graphite.

Mechanical Strength and Interface Adhesion of a Solid Oxide Fuel Cell with Doped Ceria Electrolyte

2007 ◽  
Vol 539-543 ◽  
pp. 1421-1426 ◽  
Author(s):  
Yong Song Xie ◽  
Xin Ge Zhang ◽  
Mark Robertson ◽  
Radenka Maric ◽  
Dave Ghosh
Keyword(s):  
Mechanical Strength ◽  
Screen Printing ◽  
Tape Casting ◽  
Solid Oxide ◽  
Doped Ceria ◽  
Oxide Fuel ◽  
Interface Adhesion ◽  
Firing Techniques ◽  
Reliability Methods ◽  
Ceria Electrolyte

An SOFC must have sufficient mechanical strength and interface adhesion to ensure it can be handled without breakage during fabrication and assembly, and has desired performance and reliability. Methods for measuring mechanical properties and interface adhesion of an SOFC have been developed and measurements made on a cermet-supported SOFC with a SDC electrolyte. The SOFC evaluated had a porous NiO-YSZ substrate, a porous NiO-SDC anode and a dense SDC electrolyte fabricated using tape-casting, screen-printing and co-firing techniques. The flexural strength and interface adhesion of the substrate, the anode and the electrolyte, along with their Young’s modulus, hardness and residual stress, were quantitatively measured. The results of the measurements indicate that the NiO-YSZ supported, SDC electrolyte SOFC has adequate mechanical strength and sufficient interface adhesion.

20. Family-friendly statutes

2019 ◽  
pp. 343-368
Author(s):  
Stephen Taylor ◽  
Astra Emir
Keyword(s):  
Maternity Leave ◽  
Parental Leave ◽  
Health And Safety ◽  
Safety Issues ◽  
Paternity Leave ◽  
Flexible Working ◽  
Family Friendly ◽  
Care Health ◽  
The Right ◽  
The Impact

This chapter looks at ‘family-friendly employment laws’ and breaks each down into its component parts. It also considers whether it is appropriate that the statute book should reflect a commitment to a ‘work-life balance’, or whether this kind of legislation in fact ignores the needs of business and therefore has a deleterious effect on the economy. It begins with a background on ‘family-friendly’ legislation. It then discusses ante-natal care, health and safety issues, maternity leave, maternity pay, paternity leave, shared parental leave, adoption leave, parental leave, time off for dependants, the right to request flexible working, the right to request time off for training and the impact of family-friendly legislation.

scholarly journals Screen-Printed, Pure Carbon-Black Thermocouple Fabrication and Seebeck Coefficients

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 403 ◽  
Author(s):  
Christina Offenzeller ◽  
Marcel Knoll ◽  
Bernhard Jakoby ◽  
Wolfgang Hilber
Keyword(s):  
Carbon Black ◽  
Screen Printing ◽  
Low Cost ◽  
Carbon Particles ◽  
Seebeck Coefficients ◽  
Pure Carbon ◽  
Printing Inks ◽  
Available Carbon ◽  
Cost Efficient ◽  
Stable Linear

Thermocouples classically consist of two metals or semiconductor components that are joined at one end, where temperature is measured. Carbon black is a low-cost semiconductor with a Seebeck coefficient that depends on the structure of the carbon particles. Different carbon black screen-printing inks generally exhibit different Seebeck coefficients, and two can therefore be combined to realize a thermocouple. In this work, we used a set of four different commercially available carbon-black screen-printing inks to print all-carbon-black thermocouples. The outputs of these thermocouples were characterized and their Seebeck coefficients determined. We found that the outputs of pure carbon-black thermocouples are reasonably stable, linear, and quantitatively comparable to those of commercially available R- or S-type thermocouples. It is thus possible to fabricate thermocouples by an easily scalable, cost-efficient process that combines two low-cost materials.

Phytochromography— Screen Printing with Plants: Research into Alternative Ink Technology

Leonardo ◽  
1999 ◽  
Vol 32 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Phil Shaw
Keyword(s):  
Occupational Health ◽  
Plant Material ◽  
Screen Printing ◽  
Industrial Process ◽  
True Nature ◽  
Research Issues ◽  
Water Based ◽  
Printing Inks ◽  
Initial Results ◽  
Research Show

Doubts about the true nature of recently introduced “water-based” screen-printing inks prompted research into the possibility of producing genuinely water-based inks in which both pigment and thickener are derived from vegetable sources. Literature suggests that not only is this possible but it might even be viable as an industrial process. The author's research concentrates primarily on the development of a range of “process,” or “trichromatic,” screen-printing colors from plants, for which the author has coined the term, “Phytochromography.” To complement this work, the author describes the establishment of an “ink garden” capable of supplying quantities of plant material for further research. Issues relating to the environment, occupational health and sustainability are also touched upon. Initial results of this research show considerable cause for optimism, although some problems remain.

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