Rezumat: Rezumat

Rezumat:

• Rezumat:

• In ultimii ani, cercetarile privind noile surse de energie “verde” au crescut semnificativ. Natura ne ofera un numar “nelimitat” de surse de energie, energia generata de ocean fiind una dintre ele. Generatorii pe baza de elastomeri dialectrici, reprezentand o tehnologie relativ noua, ofera posibilitatea convertirii energiei mecanice (de ex.: energia valurilor) in energie electrica, mult mai utila. Scopul proiectului este de a obtine noi materiale pentru generatori pe baza de elastomeri dielectrici. Se vor obtine noi materiale pe baza de siloxani cu permitivitate dielectrica imbunatatita, pierderi dielectrice mici, conductivitate redusa si proprietati mecanice bune. Pentru imbunatatirea permitivitatii dielectrice, se vor folosi grupe polare atasate polimerului pe catena principala. Se vor obtine copolimeri cu diferite procente de dipoli in pozitii aleatorii, dar si in pozitii bine stabilite. Noile materiale obtinute se vor analiza din punct de vedere mecanic, electric si, in special, se va analiza fezabilitatea convertirii energiei mecanice in energie electrica. La sfarsitul proiectului nu doar se va obtine un material care poate fi utilizat in tehnologia generatorilor pe baza de elastomeri dielectrici, dar si intelegerea relatiilor structura-proprietati va fi imbunatatita.

Cuvinte cheie: permitivitate, sinteza siloxanilor polari, elastomeri, actuatori, generatori pe baza de elastomeri dielectrici.

• Cuvinte cheie: permitivitate, sinteza siloxanilor polari, elastomeri, actuatori, generatori pe baza de elastomeri dielectrici.

• Perioada de derulare: 01.01.2013 – 31.12.2015

• Principalii investigatori: Dr. Dorina Maria Opris – EMPA

• Dr. Carmen Racles – ICMPP

5) “Fine-tuning of the dielectric properties of polysiloxanes by chemical modification” S.J. Dünki, M. Tress, F. Kremer, S.Y. Ko, F.A. Nüesch, C.D. Varganici, C. Racles, D.M. Opris, RSC Adv. 2015, 5, 50054-50062.

• 5) “Fine-tuning of the dielectric properties of polysiloxanes by chemical modification” S.J. Dünki, M. Tress, F. Kremer, S.Y. Ko, F.A. Nüesch, C.D. Varganici, C. Racles, D.M. Opris, RSC Adv. 2015, 5, 50054-50062.

• 6) “Full silicone interpenetrating bi-networks with different organic groups attached to the silicon atoms” C. Tugui, M. Cazacu, L. Sacarescu, A. Bele, G. Stiubianu, C. Ursu, C. Racles, Polymer, 2015, 77, 312-322.

• 7) “Tuning the electromechanical properties of silicones by crosslinking agent” A. Bele, M. Cazacu, C. Racles, D.M. Opris, G. Stiubianu, D. Ovezea, M. Ignat,, Adv. Eng. Mater 2015, 17(9), 1302–1312.

• 8) “Highly stretchable composites from pdms and polyazomethine fine particles” C. Racles, V. E. Musteata, A. Bele, M. Alexandru, C. Tugui, A. Matricala, RSC Adv., 2015, 5, 102599-102609.

• 9) “Dielectric Materials, Design and Realization”, D.M. Opris, J.E.Q. Quinsaat, S. Dunki, Y.S. Ko, M. Alexandru, C. Racles F.A. Nuesch, in: ELECTROACTIVE POLYMER ACTUATORS AND DEVICES (EAPAD) 2015, Proceedings of SPIE, Edited by BarCohen, Y, Volume: 9430, Article Number: 94300A, DOI: 10.1117/12.2086134

Comunicari si postere:

• Comunicari si postere:

•  1. D.M. Opris, S. Grimm, F. Nüesch, M. Molberg, G. Kovacs, C. Racles, M. Cazacu, J. Quinsaat, H. Hofmann, "Self-reparable Dielectric Elastomer Actuators"; Makromolekulares Kolloquium Freiburg, February 23 - 25, 2012, Freiburg, Germany. (prezentare orala)

• 2. D.M. Opris, S. Dünki, F. Nüesch, J.E.Q. Quinsaat, Y.S. Ko, S. Michel, C. Racles, M. Cazacu, "Dielectric elastomers put to work", SCS Fall Meeting 2013, September 6, 2013, Lausanne, Switzerland. (prezentare orala)

• 3. D.M. Opris, J.E.Q. Quinsaat, F. Nüesch, H. Hofmann, C. Racles, M. Cazacu, "Dielectric elastomer actuators", Makromolekulares Kolloquium Freiburg, 24-26 February, 2013, Freiburg, Germany. (poster)

• C. Racles, M. Cazacu, D. Opris, “Silicone elastomers for actuation” EuroEAP 2011: First international conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles, Pisa, 8-9 June 2011. (poster)

• C. Racles, M. Cazacu, B. Fischer, D.M. Opris, “Synthesis and characterization of silicones containing cyanopropyl groups and their use in dielectric elastomer actuators”; EuroEAP 2013: International conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles, Dübendorf, 25-26 June 2013. (poster)

6. C. Racles, M. Cazacu, M. Alexandru, A. Bele, V. Musteata, D. Ionita, S. Vlad, C. Varganici, F. Doroftei, “Polimeri siliconici cu grupe polare pentru actuatie”, Zile Academice Iesene, 2-5 oct. 2013, Iasi. (poster)

• 6. C. Racles, M. Cazacu, M. Alexandru, A. Bele, V. Musteata, D. Ionita, S. Vlad, C. Varganici, F. Doroftei, “Polimeri siliconici cu grupe polare pentru actuatie”, Zile Academice Iesene, 2-5 oct. 2013, Iasi. (poster)

• 7. C. Racles, M. Alexandru, V. Musteata, A. Bele, M. Cazacu, “Tailoring the dielectric properties of silicones by chemical modification”, The 13th International Balkan Workshop on Applied Physics, Constanta, 4-6 July 2013. (poster)

• 8. C. Racles, M. Alexandru, A. Bele, V. Musteata, M. Cazacu, S. Dunki, D.M. Opris, “New insights into tailoring dielectric properties of silicones by chemical modification”, EuroEAP 2014, Linköping, Sweden, 10-11 June 2014. (poster)

• 9. A. Bele, M. Cazacu, M. Alexandru, V. Musteata, D.M. Opris, C. Racles, “A dual strategy for improving the electromechanical properties of silicones”, EuroEAP 2014, Linköping, Sweden, 10-11 June 2014. (poster)

• C. Racles, M. Cazacu, M. Alexandru, A. Bele, V. Musteata, F. Doroftei, “Composites from incompatible polymer pairs: silicone elastomers as disperse phase or matrix”, ICCE-22, Malta, July 13-19, 2014. (prezentare orala)

• 11. V.E. Musteata, C. Racles, M. Cazacu, M. Alexandru, A. Bele, D.M. Opris, “Polysiloxanes for dielectric actuators and their molecular dynamics”, 8th International Symposium “Molecular Order and Mobility in Polymer Systems”, St. Petersburg, June 2-6, 2014. (poster)

12. S. Dünki, M. Alexandru, A. Bele, M. Cazacu, F. Nüesch, D. Opris, C. Racles, “Influence of Polar Groups on the Dielectric Constant of Silicones”, Macromolecular Colloquium, 26-28.02.2014, Freiburg, Germany. (poster)

• 12. S. Dünki, M. Alexandru, A. Bele, M. Cazacu, F. Nüesch, D. Opris, C. Racles, “Influence of Polar Groups on the Dielectric Constant of Silicones”, Macromolecular Colloquium, 26-28.02.2014, Freiburg, Germany. (poster)

• 13. C. Racles, M. Alexandru, M. Cazacu, A. Bele, S. Dünki, D.M. Opris, “Polysiloxanes with -cyanopropyl groups: considerations on(co)-hydrosilylation reactions and applications for dielectric elastomer transducers”, PolyColl 2014 Annual Meeting of the Division of Polymers, Colloids and Interfaces, 20 June 2014, Dubendorf, Switzerland. (poster)

• 14. M. Dascalu, A. Bele, V.E. Musteata, M. Cazacu, D. M. Opris, C. Racles, “Elastic silicone networks with increased permittivity and high breakdown fields for dielectric elastomer transducers”, The 3nd CEEPN Workshop on Polymer Science, “Petru Poni” Institute of Macromolecular Chemistry, September 23-26, 2015, Iasi (comunicare orala)

• 15. C. Racles, M. Dascalu, A. Bele, V. Musteata, M. Cazacu, D.M. Opris, “Polar silicones for electro-mechanical transduction”, Seventh Cristofor I. Simionescu Symposium, 4-6 iunie 2015, Iasi

• 16. M. Dascalu, A. Bele, V. Musteata, M. Cazacu, S. Duenki, D. Opris, C. Racles, “Polar-nonpolar interconnected elastic networks with increased permittivity and high breakdown fields for dielectric elastomer transducers”, 5th international conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles, June 9-10, 2015, Tallinn, Estonia