The addition of MoO$_3$ or SiO$_2$ nano-/microfillers thermally stabilized and mechanically reinforce the PVDF-HFP/PVP polymer composite thin films

Gradišar Centa, Urška (author), Pogačnik Krajnc, Anja (author), Slemenik Perše, Lidija (author), Šobak, Matic (author), Mihelčič, Mohor (author)

The properties of thin polymer films are influenced by the size of the fillers, their morphology, the surface properties and their distribution/interaction in the polymer matrix. In this work, thin polymer composite films with MoO$_3$ or SiO$_2$ nano and micro fillers in PVDF-HFP/PVP polymer matrix were successfully fabricated using the solvent casting method. The effects of different types, sizes and morphologies of the inorganic fillers on the crystallization of the PVDF-HFP polymer were investigated, as well as the effects on the thermal and mechanical properties of the composites. Scanning electron microscopy, ATR-FTIR spectroscopy, differential scanning calorimetry, nanoindentation and uniaxial mechanical tests were used for characterization. The results showed that MoO$_3$ nanowires thermally stabilized the polymer matrix, induced crystallization of the PVDF-HFP polymer in all three polymorphs (α-, β-, γ-phase) and formed a geometrical network in the polymer matrix, resulting in the highest elastic moduli, hardness and Young’s modulus.

• Language: English
• Keywords: polymer composites, crystallization, PVP, PVDF-HFP, mechanical properties, thermal properties
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: 12 str.
• Numbering: Vol. 14, iss. 12, [art. no.] 1603
• PID: 20.500.12556/RUL-166215
• UDC: 620.1:532
• ISSN on article: 2079-6412
• DOI: 10.3390/coatings14121603
• COBISS.SI-ID: 220430339
• Publication date in RUL: 24.12.2024

Record is a part of a journal

• Title: Coatings
• Shortened title: Coatings
• Publisher: MDPI AG
• ISSN: 2079-6412
• COBISS.SI-ID: 523035673

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0264
• Name: Trajnostni Polimerni materiali in Tehnologije

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P1-0099
• Name: Fizika mehkih snovi, površin in nanostruktur