Filters
cris logo
-
New search Filters
Select from list
Displayed from Show more
You have reached the maximum number of displayed search results.
All results displayed
No results are available for the search performed
Displayed from
You have reached the maximum number of displayed search results.
All results displayed
Loading results
Obtaining statistical data

Projects / Programmes source: ARIS

New materials for printed sensors and indicators and their integration in smart printed matter

Edit
Research activity

Code Science Field Subfield
2.09.00  Engineering sciences and technologies  Electronic components and technologies   

Code Science Field
T001  Technological sciences  Electronics and Electrical technology 

Code Science Field
2.02  Engineering and Technology  Electrical engineering, Electronic engineering, Information engineering 
Keywords
chromogenic materials, photocataliticaly active materials, indicator materials, microencapsulation, multifunctional printing inks, printed indicators, printed sensors, capacitive sensors, resistance-based sensors, printed electronics, smart printed matter
Evaluation (rules)
source: COBISS
Evaluation of bibliographic research performance indicators according to ARIS methodology
Citations Citations for bibliographic records in COBIB.SI that are linked to records in citation databases
source: WoS source: Scopus source: COBISS
Researchers (15)
no. Code Name and surname Research area Role Period No. of publications
1.  22313  PhD Janez Bernard  Civil engineering  Researcher  2013 - 2016  148 
2.  04566  PhD Bojana Boh Podgornik  Chemistry  Researcher  2013 - 2016  832 
3.  19165  PhD Marjetka Conradi  Physics  Researcher  2013 - 2016  165 
4.  11292  PhD Vilma Ducman  Civil engineering  Researcher  2013 - 2014  512 
5.  33685  Darijan Faktor    Technical associate  2013 - 2016  2 
6.  31635  PhD Mojca Friškovec  Materials science and technology  Researcher  2013 - 2016  48 
7.  33684  Jana Hleb    Technical associate  2013 - 2016  0 
8.  04423  PhD Marta Klanjšek Gunde  Electronic components and technologies  Head  2013 - 2016  562 
9.  22315  PhD Tadeja Kosec  Chemistry  Researcher  2013 - 2016  345 
10.  03494  PhD Marijan Maček  Electronic components and technologies  Researcher  2013 - 2016  178 
11.  24916  Franci Novak    Technical associate  2013 - 2016  0 
12.  12521  PhD Andrijana Sever Škapin  Civil engineering  Researcher  2013 - 2016  433 
13.  28798  PhD Boštjan Šumiga  Materials science and technology  Researcher  2013 - 2016  82 
14.  32022  PhD Erika Švara Fabjan  Chemistry  Researcher  2016  73 
15.  20048  PhD Alenka Vesel  Electronic components and technologies  Researcher  2013 - 2016  706 
Organisations (7)
no. Code Research organisation City Registration number No. of publications
1.  0104  National Institute of Chemistry  Ljubljana  5051592000  21,527 
2.  0106  Jožef Stefan Institute  Ljubljana  5051606000  91,767 
3.  0206  Institute of Metals and Technology  Ljubljana  5051622000  6,175 
4.  1502  Slovenian National Building and Civil Engineering Institute  Ljubljana  5866324000  9,988 
5.  1538  University of Ljubljana, Faculty of Electrical Engineering  Ljubljana  1626965  28,180 
6.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,970 
7.  2324  CETIS, grafične in dokumentacijske storitve, d.d. (Slovene)  Celje  5042208  49 
Abstract
Smart printed matter is a product of graphic technology, which will remain despite of full introduction of information technologies. It is a synthesis of printed electronics with indicator materials and advanced graphic design. The variability and uniqueness of smart printing matter is subject to these three mentioned fields. Indicator materials have to response to external factors in a repeatable and controllable manner. Their most important feature is a clearly visible and easily recognizable colour change. Printed sensors detect the external factors electrically, which allows communication with other electronic equipment. However, they usually do not combine chromogenic effects and remain therefore invisible to the customer. Active combination of indicator materials, printed electronics and appropriate graphic design allow combining these features to a new product called a smart printed matter. Organic and mixed composites predominate among the chromogenic indicator materials. Their properties depend on several external factors simultaneously, e.g. temperature, UV radiation and pH of the surroundings. We will develop new indicator materials and/or improve the existing ones so that only one of the external factors will dominate and its effects will be repeatable within certain region of interest. Some of these materials will be developed and used for printed indicators, which change color in accordance with temperature, thermal history or UV radiation. Indicator materials will be microencapsulated to work properly also in the non-isolated environments. For this purpose we will take into consideration the required flexibility of the microcapsule’s polymeric shell, its non-permeability for the core material, the optimal thickness, the appropriate light transmittance and the mechanical and thermal stability. Additional functionalities will be introduced by proper selection of materials applied for polymeric shell and its further modification. Such microcapsules are the so-called multifunctional pigments, which, together with an appropriate binder, will be applied in multifunctional printing inks. These inks will be used further for printed functionalities. Printed electronics is capable of producing significantly bigger sensors than conventional microelectronic technology. Resistance-based sensors that measure the absorption of the analyte through the change in resistance, and capacitive sensors, which detect this by changes of the dielectric constant of the sensor layer, will be printed. The changes of electric properties of sensor layers will be controlled also by chromogenic inks to provide the corresponding visual perception. We will also explore the possibility to print 3D freestanding structures, such as electro-thermal actuator. Printing offers advantages of large dimensions that such devices need for good functioning. The smart printed matter will be prepared by combining indicator materials, multifunctional printing inks and printed electronics with special methods of security printing in advanced graphic design. It will be able to protect the packaging against counterfeiting, provide consumers with additional and easily recognizable information about the product and allow appropriate electronic communication. The proposed project will open up a new area dedicated to developing suitable combinations of printed electronics, indicator materials, security printing and advanced graphic design.
Significance for science
The research consists of knowledge from different areas of sciences to enable various applications within smart printed matter / smart packaging (the last term was developed and adopted worldwide during this project). Several important contributions to the science on these areas were made - for graphic art, medicine, materials science, photochemistry, spectroscopy, optics etc. Important new scientific information was provided for (a) science of composite materials, (b) microencapsulation, (c) functional printing inks, and (d) printed electronics. (a) Organic chromogenic composites were used to prepare using Bisphenol A for proton donor (developer); it was successfully replaced by a more suitable and non-toxic substance. Using spectroscopy methods we were able to provide molecular level-based information about the best molar ratio of the ingredients that gives perfect reversibility, maximum possible coloration and total discoloration where all dye molecules involved. It was shown that thermal properties of TC composites strongly depend on hydration effect after the synthesis. Reasonably wide temperature regions were detected where the currently accepted mechanism for the thermochromic effect do not work. On the area of mixed organic-inorganic composites new smart materials for indicators and dosimeters of effectiveness of UV-curing and exposure to sunlight and/or UV radiation were developed. They are suitable for functional printing inks to prepare smalt labels for packaging or for a suitable other place where visible information about exposure to UV radiation is useful / desired / required. Such labels could gradually improve testing of UV-curing units used in many production lines for printing or painting of surfaces with UV-curable inks / coatings. Another useful application could be found within primary dermatological preventive of humans against UV-radiation and to indicate the quality of products sensitive to UV radiation. (b) It was shown that microencapsulation influences on the thermochromic effect, which additionally proves the hypothesis that phase changes are not directly connected with the colour change of TC composites. (c) Printing inks with microencapsulated liquid crystals selectively reflects the light with significant angular dependence, which most likely confirms that the corresponding macromolecules of chiral-nematic mesophase are partially oriented inside microcapsules. In addition, multi-functional printing inks with simultaneous thermochromic and fluorescent effects were made/synthesized. It was shown that the two optical effects competing each other. (d) Some problems on the area of printed electronics were analysed, where multi-layered prints are required. Very often solvent-based and UV-curable inks have to be combined, where the solvent could protrude through the underneath layer which could make different undesired effects such as electrical shorts on the middle layer. The influence of the degree of polymerization of the sensor layer on the performances of a screen-printed capacitive chemical sensor were analysed.
Significance for the country
The researchers from governmental research-performing organisations have been successfully cooperated with researchers / developers from the industry to create and transfer the latest scientific knowledge into rapidly growing industry. The common work provided new research ideas and proofed new concepts used in advanced applications. The project group and the work procedure enabled a successful transfer of knowledge on both directions and also assured an influence to the society as a whole. Research on materials for smart packaging is important especially for protection of consumers (e.g. safe food) which has a considerable influence to the society. This issue was shown by temperature indicators and indicators/dosimeters of UV radiation. A remarkable amount of research was done in collaboration with researchers from abroad (group form Czech Republic and from Croatia). This confirms that the project group is actively involved in the international research opportunities. Considerable attention was paid on education. During working on the project were accomplished 2 diploma works (Sara Golobič – 1st Bologny degree, Simona Slak – pre-Bologna system), one 1st Bologna degree (Petra Drnovšek) and 2nd Bologna degree (Miha Golob) are currently finishing (March 2017). One PhD thesis was finished in Slovenia (Maša Horvat) and another one in Czech Republic (Ondrej Panak), and three theses are close to their finish (Andreja Pondelak, Kristina Bašnec, Maja Jakovljević). These data confirms that the research performed on this project importantly contributed to educational growth of the highest educated persons for industry and research. For the research area are these facts very important, while with these highest educated people it is possible to continuously increase the technological and innovative level of the industry. The research made on the project formed a basis for qualitative jump of chemical and printing / graphic industry into innovative level with high added value on the area of smart materials for printing purposes and for production of smart packaging. It is reasonable to expect that the direct results of the research will be influence on the wider economic area.
Most important scientific results Annual report 2013, 2014, 2015, final report
Most important socioeconomically and culturally relevant results Annual report 2013, 2014, 2015, final report
Confirmation required
Views history
Favourite