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PVA/SiO2 nanocomposite films: evaluation of mechanical, thermal, optical and physico-schemical properties

  • Varsha Srivastava , Sangeeta Garg and Amit D. Saran ORCID logo EMAIL logo
Published/Copyright: August 8, 2025

Abstract

Polyvinyl alcohol (PVA) films embedded with SiO2 nanoparticles (33–59 nm) were studied for their mechanical, thermal, optical, and physicochemical properties. SiO2 nanoparticle sizes were controlled using a modified sol–gel method. Characterization was done using field emission-scanning electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, UV–Vis spectroscopy, universal testing machine, and differential scanning calorimetry. Maximum tensile strength (45.7 MPa) was achieved for the particle size of SiO2 as 33 nm. Mechanical strength increased from 18.3 MPa (pure PVA) to 47.3 MPa (6 wt.% SiO2) and decreased at higher loadings. The melting point was enhanced from 210 °C (pure PVA) to 222.2 °C (6 wt.% SiO2). Enthalpy of fusion increased from 3.9 J g−1 to 10.1 J g−1, and % crystallinity from 2.3 % to 6.1 %. Density, chemical resistance, and water barrier properties were also enhanced. For achieving maximum tensile strength, optimal reagent concentrations for particle size and loading were determined using response surface methodology. This study highlights PVA/SiO2 films as potential packaging materials with improved properties.


Corresponding author: Amit D. Saran, Department of Chemical Engineering, Dr. B.R. Ambedkar National Institute of Technology Jalandhar, Jalandhar, Punjab, 144008, India, E-mail:

  1. Research ethics: Not applicable.

  2. Informed consent: Informed consent was obtained from all individuals included in this study, or their legal guardians or wards.

  3. Author contributions: All authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  4. Use of Large Language Models, AI and Machine Learning Tools: None declared.

  5. Conflict of interest: All other authors state no conflict of interest.

  6. Research funding: The authors would like to thank the SCIENCE AND ENGINEERING RESEARCH BOARD, (SERB) (A statutory body of the Department of Science and Technology, Government of India) for the funded research project entitled “Colloidal Quantum dots as Enhancers in Photo catalytic Hydrogen Generation”, file no. CRG/2021/000011-G.

  7. Data availability: Data will be made available on request.

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Received: 2024-09-30
Accepted: 2025-03-31
Published Online: 2025-08-08
Published in Print: 2025-08-26

© 2025 Walter de Gruyter GmbH, Berlin/Boston

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