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Jubaidah, Jubaidah
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Journal : Teknomekanik

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Uniaxial and biaxial hot pressing of PVDF films: A pathway toward high-performance piezoelectric sensors and energy harvesters Suprapto, Suprapto; jubaidah, Jubaidah; Triono, Selamat; Gunawan, Harianto; Lisyanto, Lisyanto; Nugraha, Aditya Sukma; Aldori, Yopan rahmad
Teknomekanik Vol. 9 No. 1 (2026): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v9i1.44972

Abstract

The piezoelectric efficiency of Poly (vinylidene fluoride) (PVDF) membranes becomes restricted by the challenge of generating and stabilizing electroactive β-phase during processing. Stretching requires control of deformation parameter, while solvent-based methods bring environmental and occupational health risks. This research suggests hot-pressing as an alternative method for enhancing β-phase fraction, utilizing multidirectional stress without solvent or chemical exposure. This study systematically compares uniaxial hot-pressing (Uniaxial HP) and biaxial hot-pressing (Biaxial HP) setups to determine which stress distribution is more effective at promoting changes and improving piezoelectric properties in PVDF membranes. The main objective of this research is to systematically evaluate and compare the impacts of uniaxial and biaxial hot-pressing on the crystalline phase transformation and electromechanical performance, including the piezoelectric coefficient (d33) and output voltage response of PVDF membranes. PVDF pellets were hot-pressed at 220o C under a pressure of 60 MPa for 15 minutes followed by rapid quenching in ice water. X-Ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) confirmed phase composition, correlated with performance via the piezoelectric coefficient (d33), and assessed piezoelectric activity. Experimental results show that biaxial loading provides a higher b-phase fraction (50.47%) compared to untreated membranes (47.80%) and UHP samples (49.30%). The crystallinity and the piezoelectric coefficient also increased to 49% and 18.8 pC/N, respectively. Biaxial stress pattern during hot-pressing induces favourable thermodynamic and kinetic conditions for b-phase expansion. Beyond phase-related results, the approach delivers competitive piezoelectric effectiveness while maintaining simplicity and reducing solvent-dependent processing steps.
Co-Authors Afriliani, Hesti Almarind, Marisa Amenobelia, Amenobelia Anysa, Ega Aryanta Sembiring, Robi Batumahadi, Batumahadi Binsar Panjaitan, Binsar Budiman Nasution Damanik, Marini Diansyah, Diansyah Diba, Adinda Farah Eka Daryanto, Eka Eswanto, Eswanto Fajar Apriani Fatmawati Fatmawati Firmansyah Nasution, Taufik G. Sibarani, Wendy. Ginting, Ladyna Velisa Giovan Panjaitan, Asido Gunawan, Harianto Gunawan, Safri Hardiansyah, M. HENRY ISKANDAR Hutajulu, Romantina Ifda Tanjung, Yul Irawan, Andi Wahyu Irfani, Vania Ayu Jarkani, Muhammad Juli Dwi Astuti, Anik Khairani, Farizka Khairunnisa, Adinda Dwi Khairunnisah, Noni Antika Listiyanto, Listiyanto Lisyanto . Lova, Dea Lumbantoruan, Sri Rezeki M Gultom, Septhya Meidiansyah, Fadli Melvi, Lisa Muhammad Yusuf Muhtadin Muhtadin Nirmalasari, Ridha Noor Hujjatusnaini Noor, Muhammad Arifin Nurdin Siregar Nurkhalisa, Siti Salma Pakpahan, Binsar R. Nurfazriah, Latifah Rahma, Ukik Aisya Ramadhan, Ahmad Ananda Ramadhan, Irham Ramadhan, Risca Ariska Rasenda, Rasenda Riana Puspita, Riana Rivaldo, Samuel Rosdiyanti, Evi Rugaya, Rugaya Saputri, Arum Dwi Selamat Riadi Selamat Triono, Selamat Siagian, Ruben Cornelius Siddik, M. Silalahi, Jihan Syifa Silalahi, Renata Agustina Simatupang, Christina Triwahyuni Sinaga, Karina Angely Sinaga, Maria Putriguna Soe'oed, Rahmat Sri Hayati, Sri Suhaesty, Yeye Sukma Aditya Suprapto Suprapto Surawardi Surawardi, Surawardi Suraya, Rizky Surya Dharma Syahputri, Nurlaily Syahra, Assyfa Tamba, Ester Maesya Thomas Thomas Ulina, Sri Yeni Megalina, Yeni Yolanda Yolanda, Yolanda Yopan Rahmad Aldori Yusuf Yusuf