NANOFOR Project: Microwave reactors for advanced synthesis of nanoparticles

The NANOFOR nanoparticula_webproject aims to obtain colorless nano-fluorophors with high optical response by excitation and up-conversion at pre-designed wavelengths. To this end, the synthesis will be developed by new microwave reactors in continuous, also including the systems of identification and recognition for the control of the process.

From the scientific point of view, it brings a new advance in the synthesis processes to obtain nanocrystals with special optical properties. Technologically it involves increasing the production capacity to levels well above the state of the art, as well as improving the optical properties obtained with the existing processes.

The consortium consists of CEINNMAT as a developer of the procedures, the ICMol-UV that brings its knowledge in design and synthesis of nanocrystals, and DIMAS-UPV group for the design of microwave reactors. The partners will address the major challenges proposed through collaboration between nanoscience, materials science, new technology developments and results marketing.

ThLogo_conjunto_MINECO_FEDER_2is project RTC-2016-5114-5 has been financially supported by Ministerio de Economía y Competitividad (MINECO) -Spanish Government- and  by European Regional Development Funds (ERDF) of European Union.

bandera-espanya  Spanish version

New paper published at IEEE MTT

DIMAS has published in April 2017 a new research paper at IEEE Transactions on Microwave Theory and Techniques. It is entitled “Enhanced Full-Wave Circuit Analysis for Modeling of a Split Cylinder Resonator” and presents another way of analysing the split resonator by circuit analysis. Circuit analysis applied to electromagnetic strutures is a technique that DIMAS has been developing last years, with several publications and applications specially in the field of dielectric characterization of material (dielectrometry).


2017-04-04-Imagen articulo MTT-David-v01

Split cavity and circuit analysis

In this case the improvement consists of using higher modes in the circuit characterization of all the simple networks that appear when the original structure is segmented into smallest and simplest ones. Then, not only the TM0np modes can be analysed but also all the set of TE and TM resonant modes that appear in the split cavity resonator.
The main application will be the possibility of using more resonant modes to characterize planar materials and to increase the frequency band where the permittivuity is calculated.
This paper is a part of the research work performed by David Marqués-Villarroya in his way to get the PhD in Electrical Engineering, and is the result of an extension of the original paper published in the International Microwave Symposium (IMS) held in San Francisco (USA) in May 2016.

New research paper in the “Journal of Food Engineering”

DIMAS has published a new research paper in early 2017 in the Journal of Food Engineering. The paper is entitled: “Dynamic measurement of dielectric properties of food snack pellets during microwave expansion“.

This is the result of a collaboration between PepsiCo R&D and DIMAS.


Calorimeter facility at DIMAS laboratory

The papers presents in situ dielectric properties measurements of a starch-based foodfood pellet during microwave expansion. To do this, a dual-mode cylindrical cavity that allowed simultaneous microwave heating and dielectric measurements of a single pellet inside a quartz tube was used, ensuring uniform heating during microwave processing.
This systemm in shown in the figure. It is a DIMAS facility that included additional measurement devices to correlate the dielectric properties with the main parameters of the expansion process, such as temperature, expansion time, pellet volume
and absorbed power.

DIMAS participates in COSMIC european project

DIMAS is participating in the COSMIC (European Training Network for Continuous Sonication and Microwave Reactors) european project.
The kick-off of the project was held in Leuven (Belgium) in March 2017, where all the 12 partners (beneficiaries and partner organizations) participated and exchanged discussions about the future of the project.
All the 15 students that will be devolping their PhD in the frame of this project also participated in the kick-off meeting and also discussed with the host partners the activity to be done during their visits along the duration of the project.
DIMAS will host four of these students: two of them will arrive from KU Leuven (Belgium), one from UCL (UK) and the last one from Universidad de Zaragoza (Spain).
The student hosted by DIMAS will perform experiments with the microwave facilities available at DIMAS laboratory.

The project science and technology objectives are to develop:

1.-Resource-efficient multiphase reactions in the fields of organic synthesis (C–H, C=C and C=C bond activation) and nanoparticle synthesis (for use in catalysis and health applications);
2.-Intensified reactors that efficiently integrate milliflow technology with ultrasound and/or microwave actuation;
3.-Knowledge-based assessment and decision methodologies to evaluate and select process-intensification technologies.

2017-04-04-Imagen de COSMIC-v02

Group photo during the kick-off meeting in Leuven