Termične in mehanske lastnosti polimernega nanokompozita s silicijevim dioksidom

zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program

Nika Modic (Author), Lidija Slemenik Perše (Mentor)

Abstract

Nanotehnologije in nanokompoziti so del nanoznanosti, ki je postala eno izmed ključnih področij zanimanja, ko govorimo o znanstvenih in tehnično-industrijskih dejavnostih. Polimerni nanokompoziti so materiali, ki jih sestavljata polimerna matrica in polnilo, ki ima vsaj eno dimenzijo na nanometrski skali med 1 𝑛𝑚 in 100 𝑛𝑚 (nanopolnilo). Glede na lastnosti polimerov in nanopolnil lahko dobimo nanokompozite z najrazličnejšimi lastnostmi. V tem zaključnem delu je bil cilj primerjati termične in mehanske lastnosti štirih vzorcev, z različnimi masnimi razmerji posameznih komponent nanokompozita PVDFHFP/PVP/SiO2 in izbrati optimalno razmerje glede na proučevane lastnosti. Termično analizo smo izvedli z diferenčno dinamično kalorimetrijo, s pomočjo katere smo lahko izračunali in primerjali tudi deleže kristaliničnosti. Z enoosnimi nateznimi testi smo vzorcem določili Youngove module, z nanoindentacijo pa smo izvedli meritve trdote in modula elastičnosti. Pri tem smo uporabili nanoindenter, ki omogoča dinamične meritve z uporabo metode nepretrganega merjenja trdote. Na koncu smo z optičnim mikroskopom primerjali še površine vzorcev. Ugotovili smo, da dodatek silicijevega dioksida glede na film iz polimerne osnove PVDF-HFP/PVP poveča delež kristaliničnosti, modul elastičnosti in tudi trdoto nanokompozita. Glede na rezultate smo za optimalno razmerje masnih deležev med posameznimi komponentami izbrali vzorec PVDF-HFP/PVP/SiO2 = 70 : 20 : 10.

Keywords

polimeri;polimerni nanokompoziti;silicijev dioksid;termične lastnosti;mehanske lastnosti;

Data

Language:	Slovenian
Year of publishing:	2024
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[N. Modic]
UDC:	539.3:620.3:678.061(043.2)
COBISS:	196221443
Views:	43
Downloads:	11
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Thermal and mechanical properties of the polymer nanocomposite with silicon dioxide
Secondary abstract:	Nanotechnologies and nanocomposites are a part of nanoscience, which has become one of the key areas of interest in scientific and technical-industrial activities. Polymer nanocomposites are materials composed of a polymer matrix and a filler with at least one dimension at the nanometer scale between 1 𝑛𝑚 and 100 𝑛𝑚 (nanofiller). Depending on the properties of polymers and nanofillers, various combinations of nanocomposites can be obtained. The aim of this study was to compare thermal and mechanical properties of four samples with different mass ratios of the PVDF-HFP/PVP/SiO2 nanocomposite and select the optimal ratio based on the studied properties. Thermal analysis was performed using differential scanning calorimetry, which also enabled the calculation and comparison of the degree of crystallinity. Young's modulus of the samples was measured using uniaxial tensile tests. Hardness and elastic modulus were determined by nanoindentation using a nanoindenter that allows dynamic measurements using continuous stiffness method. Finally, the surfaces of all samples were compared using optical microscope. We found that the addition of silicon dioxide increases crystallinity, elastic modulus and hardness of the nanocomposite compared to PVDF-HFP/PVP polymer base film. Based on the results, we selected the sample PVDF-HFP/PVP/SiO2 = 70 : 20 : 10 as the optimal mass ratio of individual phases.
Secondary keywords:	polymers;polymer nanocomposites;silicon dioxide;thermal properties;mechanical properties;
Type (COBISS):	Final paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XI, 30 f.
ID:	23735406