DIELECTRIC AND FATIGUE LIFE ENHANCEMENT IN BaTiO3/Epoxy RESIN BASED COMPOSITES USED AS PIEZOELECTRIC NANOGENERATOR : Dielectric and Fatigue Life Enhancement in BaTiO3/Epoxy Resin based Composites used as Piezoelectric Nanogenerator

Wanwilai Vittayakorn; Nakulkarn Rerngroen; Apinya Sasipongpan; Rangson Muanghlua; Naratip Vittayakorn

doi:10.55766/sujst10702

Authors

Wanwilai Vittayakorn King Mongkut’s Institute of Technology Ladkrabang
Nakulkarn Rerngroen King Mongkut’s Institute of Technology Ladkrabang
Apinya Sasipongpan King Mongkut’s Institute of Technology Ladkrabang
Rangson Muanghlua King Mongkut's Institute of Technology Ladkrabang
Naratip Vittayakorn King Mongkut’s Institute of Technology Ladkrabang

DOI:

https://doi.org/10.55766/sujst10702

Keywords:

Epoxy Resin, Barium Titanate, MWCNT, Composites, Piezoelectric Nanogenerato

Abstract

This study investigates the enhancement of dielectric properties and fatigue life in BaTiO₃/epoxy resin composites utilized as the active material in piezoelectric nanogenerators. Through a systematic approach, various fabrication techniques and composite formulations are explored to optimize the dielectric constants, energy density, and piezoelectricity while mitigating fatigue-related degradation. The physical character, phase formation, and chemical properties of these composites are identified via the optical camera, XRD, and FTIR methods, respectively. The frequency dependence of dielectric properties for all samples is measured by an LCR meter. The hysteresis P-E loops are investigated in order to calculate the energy density and energy loss density of materials. The piezoelectric properties of these composites are performed by studying the generated output voltage and current after applying mechanical force to the samples. Moreover, MWCNT nanomaterials have also been incorporated into these composites in order to improve their dielectric value and fatigue life. The results show that the dielectric constant (e_r) and dielectric loss (tand) of these composites are independent of frequency. After loading BaTiO₃ into the epoxy resin matrix, the e_r and tand significantly increased with the increasing BaTiO₃ amount. The energy density and energy loss density of all composites were calculated from these P-E loops, and it is seen that pure epoxy resin shows the lowest energy density and energy loss density values. After loading BaTiO₃ into the epoxy resin matrix, both the energy density and the energy loss density of the composites significantly increased. Moreover, after adding 20 percent by volume of BaTiO₃ to the system, the energy density increases by 160% compared with pure epoxy resin. For the effect of MWCNT filler, it is seen that the e_r, tand, energy density and energy loss density are significantly improved after adding 1.5 vol% of MWCNT into the system. The output current generated by applying mechanical force to the sample increased 27 times after adding MWCNT to the BT-filled epoxy resin composite. Finally, it can be concluded that all experimental results demonstrate significant enhancements in dielectric properties, energy density and electric output current, paving the way for the development of robust and efficient piezoelectric nanogenerators for diverse energy harvesting applications.

References

Asimakopoulos, I.A., Psarras, G.C., and Zoumpoulakis, L. (2014). Barium titanate/polyester resin nanocomposites: Development, structure-properties relationship and energy storage capability. Express Polymer Letters, 8:692-707. https://doi.org/10.3144/expresspolymlett.2014.72

Chang, J.F., Liang, G.Z., Gu, A.J., Cai, S.D., and Yuan, L. (2012). The production of carbon nanotube/epoxy composites with a very high dielectric constant and low dielectric loss by microwave curing. Carbon, 50:689-698. https://doi.org/10.1016/j.carbon.2011.09.029

Cullity, B.D. (1956). Elements of X-ray diffraction (2nd ed.). Addison-Wesley Publishing.

Ibaa, M.H.Z. and Alithari, A.S. (2023). Improving the fatigue life of composite by using multiwall carbon nanotubes. Open Engineering, 13(1):20220490. https://doi.org/10.1515/eng-2022-0490

Li, C.Y., Thostenson, E.T., and Chou, T.W. (2008a). Sensors and actuators based on carbon nanotubes and their composites: A review. Composites Science and Technology, 68:1,227-1,249. https://doi.org/10.1016/j.compscitech.2008.01.006

Li, Q., Xue, Q.Z., Hao, L.Z., Gao, X.L., and Zheng, Q.B. (2008b). Large dielectric constant of the chemically functionalized carbon nanotube/polymer composites. Composites Science and Technology, 68:2,290-2,296. https://doi.org/10.1016/j.compscitech.2008.04.019

Lu, J.X., and Wong, C.P. (2008). Recent advances in high-k nanocomposite materials for embedded capacitor applications. IEEE Transactions on Dielectrics and Electrical Insulation, 15(5):1,322-1,328. https://doi.org/10.1109/TDEI.2008.4656240

Maity, P., Kasisomayajula, S.V., Parameswaran, V., Basu, S., and Gupta, N. (2008). Improvement in surface degradation properties of polymer composites due to pre-processed nanometric alumina fillers. IEEE Transactions on Dielectrics and Electrical Insulation, 15(1):63-72. https://doi.org/10.1109/T-DEI.2008.4446737

Manika, G. and Psarras, G. (2019). Barium titanate/epoxy resin composite nanodielectrics as compact capacitive energy storing systems. Express Polymer Letters, 13:749-758. https://doi.org/10.3144/expresspolymlett.2019.63

Park, H.J., Hong, S.M., Lee, S.-S., Kim, J., and Park, M. (2008). Effects of CNT/BaTiO₃ composite particles prepared by mechanical process on dielectric properties of epoxy hybrid films. IEEE Transactions on Advanced Packaging, 31(2):417-422. https://doi.org/10.1109/TADVP.2008.920348

DIELECTRIC AND FATIGUE LIFE ENHANCEMENT IN BaTiO3/Epoxy RESIN BASED COMPOSITES USED AS PIEZOELECTRIC NANOGENERATOR