Tailoring the Optical, Electrical, and Dielectric Characteristics of PEG/PVA Blends by Integrating MWCNTs to Enhance the Performance of Advanced Energy Storage Devices
DOI:
https://doi.org/10.1021/acsaelm.5c00254Keywords:
PEG/PVA blends , MWCNTs , AC conductivity , Dielectric properties , Energy storage , Electrical equivalent circuit Read this articleAbstract
In the context of developing and encouraging flexible energy storage applications and optoelectronic devices, the influence of multiwalled carbon nanotubes (MWCNTs) on structural, optical, dielectric, and electrical characteristics of polyethylene glycol/poly(vinyl alcohol) (PEG/PVA) blends has been studied. TEM imaging confirms that MWCNTs are elongated nanotubes with multiple concentric graphene layers, typically 20–22 nm in diameter. XRD studies showed that, after MWCNTs were added , the crystallinity of the polymeric matrix decreased, whereas the amorphous content increased, ensuring significant optimization of electrical conductivity. Strong interactions between MWCNTs and the polymer matrix have also been detected by FTIR spectroscopic analysis through the shifting of absorption bands and the variation in the intensity of functional groups. Optical characterization exhibited tunable absorption properties and narrowed band gap, while the increased concentration of MWCNTs facilitated the formation of charge-transfer complexes, which enhanced electronic conductivity of the present samples. This is evidenced by the reductions in both the indirect and direct optical band gaps. For the pure PEG/PVA matrix, the indirect and direct optical band gaps were 4.24 and 4.88 eV, respectively. However, with the addition of 1.2 wt % MWCNTs these optical band gaps decreased significantly to 3.05 eV (indirect) and 4.36 eV (direct). Dielectric studies showed an improvement in electrical permittivity with reduced interfacial polarization losses. The maximum AC conductivity was observed at 1.2 wt % MWCNTs, reaching a value of 1.45 × 10–6 S/cm at room temperature. This enhancement in conductivity is attributed to the formation of interconnected MWCNT networks within the polymer matrix, which effectively lowers the energy barriers for charge transport and promotes efficient electron mobility. Impedance spectroscopy and Nyquist plots showed a considerable reduction in bulk resistance, reflecting the increased conductivity and energy storage potential. An electrical equivalent circuit was presented for each sample based on the fitting curves of the impedance spectroscopy data. Specific research findings indicated that the PEG/PVA/MWCNTs nanocomposites exhibited promising properties for the next generation of flexible electronics, storage, and optoelectronic appliances. This work provided a deep understanding of how MWCNTs doping inherently influences polymer nanocomposites and could be of great importance to designers in engineering modern advanced functional material systems.
References
Abdelghany, A. M., Oraby, A. H., & Farea, M. O. (2019). Influence of green synthesized gold nanoparticles on the structural, optical, electrical and dielectric properties of (PVP/SA) blend. Physica B: Condensed Matter, 560, 162–173.
Abdelhamied, M. M., Abdelreheem, A. M., & Atta, A. (2022). Influence of ion beam and silver nanoparticles on dielectric properties of flexible PVA/PANI polymer composite films. Plastics, Rubber and Composites, 51(1), 1–12.
Abdelrazek, E. M., Waly, A. L., Abdelghany, A. M., & Tarabiah, A. E. (2023). Mechanical and electrical studies of PVA/PVP blend filled with MWCNTs. Polymer Bulletin, 80(6), 6693–6706.
Abdelrazek, E. M., Zidan, H. M., Tarabiah, A. E., & Abdelghany, A. M. (2019). AC conductivity and dielectric characteristics of PVA/PVP nanocomposite filled with MWCNTs. Journal of Materials Science: Materials in Electronics, 30(16), 15521–15533.
Alenizi, M. A., Al-Ghamdi, S. A., Saeed, A., Abdelrazek, E. M., Alwafi, R., Mater, E. H., ... & Abdallah, E. M. (2024). Structural, optical, electrical, and dielectric properties of HPMC/PVP blend reinforced with I2O5 for optoelectronics and energy storage applications. Journal of Polymer Research, 31(11), Article 4181.
Alfannakh, H., & Ibrahim, S. S. (2022). The AC conductivity and dielectric permittivity for PVA-treated MWCNT electrolyte composite. Journal of Materials Science: Materials in Electronics, 33(31), 24137–24150.
Alharbi, E. M., & Rajeh, A. (2024). Processing polymer film nanocomposites of poly(vinylidene fluoride)/poly(ethylene oxide) and cobalt oxide nanoparticles for flexible energy storage systems. Optical and Quantum Electronics, 56(7), Article 713.
Al-Muntaser, A. A., Abdelghany, A. M., Abdelrazek, E. M., & Elshahawy, A. G. (2020). Enhancement of optical and electrical properties of PVC/PMMA blend films doped with Li4Ti5O12 nanoparticles. Journal of Materials Research and Technology, 9(1), 789–797.
Al-Muntaser, A. A., Alzahrani, E., Saeed, A., Al-Ghamdi, S. A., Alwafi, R., Abo-Dief, H. M., & Yassin, A. Y. (2024). Exploring the influence of Sudan IV Azo dye on the structural, optical, and dispersion characteristics of PVA/Su-IV composites. Physica Scripta, 99(10), Article 105991.
Al-Muntaser, A. A., Rajeh, A., Asnag, G. M., Saeed, A., Alwafi, R., Al-Harthi, A. M., ... & Yassin, A. Y. (2024). Investigation of structural and optical characteristics of PVA/crystal violet dye composites for flexible smart optoelectronic applications. Journal of Polymer Research, 31(10), Article 4160.
Alzahrani, H. S., Al-Sulami, A. I., Alsulami, Q. A., & Rajeh, A. (2022). A systematic study of structural, conductivity, linear, and nonlinear optical properties of PEO/PVA-MWCNTs/ZnO nanocomposites films for optoelectronic applications. Optical Materials, 133, Article 112900.
Arya, A., Sharma, A. L., & Sadiq, M. (2018). Effect of variation of different nanofillers on structural, electrical, dielectric, and transport properties of blend polymer nanocomposites. Ionics, 24(8), 2295–2319.
Aziz, D. M., Hassan, S. A., Singh, P. K., Kadir, M. F. Z., Karim, W. O., Aziz, S. B., ... & Al-Asbahi, B. A. (2024). Development and investigation of electrochemical and dielectric properties of eco-friendly lithium-ion conductor biopolymer electrolyte for energy storage application. Journal of Polymers and the Environment, 32(8), 3845–3868.
Aziz, S. B., Abdulwahid, R. T., Ahmed, M. B., Abdullah, O. G., & Aziz, D. M. (2024). Energy storage performance of plasticized PVA-based electrolyte: Electrical and electrochemical properties. ACS Applied Electronic Materials, 6(11), 7763–7780.
Aziz, S. B., Abdulwahid, R. T., Aziz, D. M., Mohammed, P. A., Karim, W. O., Abdullah, R. M., ... & Kadir, M. F. Z. (2024). Study of dielectric and interfacial properties of functional biopolymer-based electrolyte with enhanced conductivity for energy storage application. Materials Chemistry and Physics, 322, Article 129607.
Aziz, S. B., Aziz, D. M., Muhammad, D. S., Hama, P. O., & Abdullah, O. G. (2025). Enhancing the optical properties of chitosan-based biopolymer for optoelectronic applications using natural dye extracted from hollyhock waste flowers. Optical Materials, *159“, Article 116596.
Barooah, M., & Mandal, B. (2018). Enhanced CO2 separation performance by PVA/PEG/silica mixed matrix membrane. Journal of Applied Polymer Science, 135(28), Article 46481.
Chandra, K. P., Prasad, K., & Gupta, R. N. (2007). Impedance spectroscopy study of an organic semiconductor: Alizarin. Physica B: Condensed Matter, 388(1-2), 118–123.
Deshmukh, K., Basheer Ahamed, M., Sankaran, S., Khadheer Pasha, S. K., Kumar Sadasivuni, K., Ponnamma, D., & Al-Ali Almaadeed, M. (2018). Studies on the mechanical, morphological and electrical properties of highly dispersible graphene oxide reinforced polypyrrole and polyvinylalcohol blend composites. Materials Today: Proceedings, 5(2), 8744–8752.
El-Naggar, A. M., Ahmed, S. I., Mohamed, M. B., Kamal, A. M., & Heiba, Z. K. (2024). Improving the optical and dielectric characteristics of PVA/PVP/PEG/ZnWO4/CdS blends. Optical Materials, 152, Article 115542.
El-Naggar, A. M., Alsaggaf, A., Heiba, Z. K., Kamal, A. M., Aldhafiri, A. M., Fatehmulla, A., & Mohamed, M. B. (2023). Exploring the structural, optical and electrical characteristics of PVA/PANi blends. Optical Materials, 139, Article 113771.
El-Naggar, A. M., Alsaggaf, A., Heiba, Z. K., Kamal, A. M., Aldhafiri, A. M., & Mohamed, M. B. (2023). Impact of MWCNTs on the structural, electrical, and optical characteristics of PVA/PANi blends. Journal of Taibah University for Science, 17(1), Article 2207769.
El-Naggar, A. M., Mohamed, M. B., Kamal, A. M., Lakshminarayana, G., & Heiba, Z. K. (2024). PVA/PEG/CuCo2O4/PANi/x wt% MWCNTs blended polymers: Improved the physical properties for energy storage devices and optoelectronic applications. Diamond & Related Materials, 148, Article 111418.
Hanash, F. E., Alenizi, M. A., Alzahrani, E., Asnag, G. M. M., Mater, E. H., Alsabah, Y. A., ... & Yassin, A. Y. (2025). Study of optical, thermal, electrical, and impedance properties of Li4Ti5O12-based PEO/SA biopolymer blend electrolytes for lithium-ion batteries. ECS Journal of Solid State Science and Technology, 14(2), Article 023011.
Hamsan, M. H., Hama, P. O., Aziz, S. B., Hadi, J. M., Ahmed, M. B., Abdullah, R. M., ... & Kadir, M. (2024). Tailoring polymer electrolytes with PVA for improved performance in electrical double layer capacitors. Journal of Industrial and Engineering Chemistry, Article 11.035.
Heiba, Z. K., Bakr Mohamed, M., El-Naggar, A. M., & Kamal, A. M. (2024). Study the effect of nano NiCo2O4 doping on the optical and dielectric properties of PMMA/PEO/MWCNTs. Inorganic Chemistry Communications, 161, Article 112056.
Heiba, Z. K., Mohamed, M. B., El-Naggar, A. M., & Kamal, A. M. (2024). Effect of MWCNTs and aluminum amount on tuning the optical and electrical properties of PVA/PVP/PEG/ZnCo2-xAlxO4 composites. Applied Physics A: Materials Science & Processing, 130(5), Article 744.
Hemalatha, K. S., Damle, R., Rukmani, K., Ambika Prasad, M. V. N., & Sriprakash, G. (2015). Temperature dependent dielectric and conductivity studies of polyvinyl alcohol-ZnO nanocomposite films by impedance spectroscopy. Journal of Applied Physics, 118(15), Article 154103.
Ibrahim, M., Saron, K. M. A., Tarabiah, A. E., Ghalab, S., Morsi, M. A., & Asnag, G. M. (2024). Study of the structural, optical and electrical properties of PVA/SA performance by incorporating Al2O3 nanoparticles. Optical and Quantum Electronics, 56(6), Article 691.
James, A. R., & Srinivas, K. (1999). Low temperature fabrication and impedance spectroscopy of PMN-PT ceramics. Materials Research Bulletin, 34(8), 1301–1310.
Jha, S., Bhavsar, V., & Tripathi, D. (2021). Dielectric properties of MWCNT dispersed conducting polymer nanocomposites films of PVA-CMC-PPy. Materials Today: Proceedings, 45, 4824–4829.
Li, Y., Li, M., Lu, H., Zhang, A., Zhang, X., & Zheng, W. (2018). Effect of polar polymers of PEG and PVA on the enhanced microwave-absorbing properties of MWNTs. The Journal of Physical Chemistry C, 122(29), 16956–16963.
Loste, J., Lopez-Cuesta, J.-M., Billon, L., Garay, H., & Save, M. (2019). Transparent polymer nanocomposites: An overview on their synthesis and advanced properties. Progress in Polymer Science, 89, 133–158.
Mohammed, G., & El Sayed, A. M. (2019). Structural, morphological, optical and dielectric properties of M3+/PVA/PEG SPE films (M = La, Y, Fe or Ir). Polymers for Advanced Technologies, 30(3), 698–712.
Mohammed, S. J., Hawaiz, F. E., & Aziz, S. B. H. (2024). Organic soluble nitrogen-doped carbon dots (ONCDs) to reduce the optical band gap of PVC polymer: Breakthrough in polymer composites with improved optical properties. Optical Materials, 149, Article 115014.
Morsi, M. A., Pashameah, R. A., Al-Muntaser, A. A., Sharma, K., Alzahrani, E., & Farea, M. O. (2023). Hybrid MWCNTs/Ag nanofiller reinforced PVP/CMC blend-based polymer nanocomposites for multifunctional optoelectronic and nanodielectric applications. Journal of Polymers and the Environment, 31(2), 664–676.
Muheddin, D. Q., Aziz, S. B., & Mohammed, P. A. (2023). Variation in the optical properties of PEO-based composites via a green metal complex: Macroscopic measurements to explain microscopic quantum transport from the valence band to the conduction band. Polymers, 15(3), Article 771.
Prabu, M., Selvasekarapandian, S., Kulkarni, A. R., Sakunthala, A., & Hirankumar, G. (2010). Ionic conductivity studies on LiSmO2 by impedance spectroscopy. Ionics, 16(4), 317–321.
Prajapati, G. K., & Gupta, P. N. (2011). Comparative study of the electrical and dielectric properties of PVA-PEG-Al2O3-MI (M = Na, K, Ag) complex polymer electrolytes. Physica B: Condensed Matter, 406(15-16), 3108–3113.
Rani, P., Deshmukh, K., & Ahamed, M. B. (2020). Dielectric and electromagnetic interference shielding properties of carbon black nanoparticles reinforced PVA/PEG blend nanocomposite films. Materials Research Express, 7(6), Article 064008.
Roy, A. S., Gupta, S., Seethamraju, S., Madras, G., & Ramamurthy, P. C. (2014). Impedance spectroscopy of novel hybrid composite films of polyvinylbutyral (PVB)/functionalized mesoporous silica. Composites Part B: Engineering, 58, 134–139.
Sadiq, M., Aalam, S. M., Hasan Raza, M. M., Zulfequar, M., Khan, M. A., & Ali, J. (2022). Enhancement of electrochemical stability window and electrical properties of CNT-based PVA-PEG polymer blend composites. ACS Omega, 7(44), 40116–40131.
Sadiq, M., Zulfequar, M., Ali, J., Raza, M. M. H., & Chaurasia, S. K. (2021). Studies on flexible and highly stretchable sodium ion conducting blend polymer electrolytes with enhanced structural, thermal, optical, and electrochemical properties. Journal of Materials Science: Materials in Electronics, 32(14), 19390–19411.
Saeed, A., Alghamdi, A. M., Alenizi, M. A., Alwafi, R., Asnag, G. M., Alzahrani, E., ... & Al-Ghamdi, S. A. (2024). Preparation and investigation of structural, optical, and dielectric properties of PVA/PVP blend films boosted by MWCNTs/AuNPs for dielectric capacitor applications. Journal of Science: Advanced Materials and Devices, 9(4), Article 100802.
Saeed, A., Morsi, M. A., Assran, A. S., Asnag, G. M., Alwafi, R., Hanash, F. E., ... & Qahtan, T. F. (2024). Enhancing optical, structural, thermal, electrical properties, and antibacterial activity in chitosan/polyvinyl alcohol blend with ZnO nanorods: Polymer nanocomposites for optoelectronics and food/medical packaging applications. Polymer Bulletin, 81, Article 11645.
Saeed, A., Saeed, A., Asnag, G. M., Asnag, G. M., Alghamdi, A. M., Alwafi, R., ... & Alghamdi, S. A. (2024). Structural, optical, and electrical characteristics of HPMC/PVA-I2O5 composites: Fabrication and performance analysis for energy storage applications. Journal of Energy Storage, 96, Article 112765.
Saeed, A., Alwafi, R., Alenizi, M. A., Al-Marhaby, F. A., Al-Rasheedi, A., Asnag, G. M., ... & Al-Ghamdi, S. A. (2025). Influence of zinc acetate on HPMC/CMC polymer blend: Investigation of their composites’ structural, optical, and dielectric properties for dielectric capacitor applications. Inorganic Chemistry Communications, 171, Article 113536.
Selvasekarapandian, S., & Vijayakumar, M. (2003). The AC impedance spectroscopy studies on LiDyO2. Materials Chemistry and Physics, 80(1), 29–33.
Singh, N., Avasthi, D., Rakshit, A., & Qureshi, A. (2006). Analysis of organometallics dispersed polymer composite irradiated with oxygen ions. Bulletin of Materials Science, 29(6), 605–609.
Venugopal, R., Narsimlu, N., & Srinivas, C. (2023). Fabrication of PVA-MWCNT nanocomposite films for UV-shielding applications. Materials Today: Proceedings, 92, 1167–1174.
Yassin, A. Y. (2021). Impedance, structural and thermal analyses of polyvinyl alcohol/polyvinyl pyrrolidone blend incorporated with Li+ ions for lithium-ion batteries. Journal of Materials Research and Technology, 15, 754–767.
Yassin, A. Y. (2023). Synthesized polymeric nanocomposites with enhanced optical and electrical properties based on gold nanoparticles for optoelectronic applications. Journal of Materials Science: Materials in Electronics, 34(1), Article 46.
Yassin, A. Y., Abdelrazek, E. M., Abdelghany, A. M., & Abdallah, E. M. (2024). Incorporated Au/Se nanoparticles into HPMC/CMC blend for enhancing structural, optical and morphological properties: Hybrid nanocomposites for optoelectronic applications. Optical Materials, 154, Article 115721.
Zidan, H. M., Abdelrazek, E. M., Abdelghany, A. M., & Tarabiah, A. E. (2019). Characterization and some physical studies of PVA/PVP filled with MWCNTs. Journal of Materials Research and Technology, 8(1), 904–913.
