Vpliv staranja na površinske lastnosti lasersko teksturiranih in kemijsko modificiranih površin

zaključna naloga

Tina Sever (Author), Daniel Svenšek (Mentor), Marjetka Conradi (Co-mentor)

Abstract

V zaključni nalogi predstavljam rezultate trimesečnega opazovanja sprememb omočitvenih lastnosti različnih lasersko teksturiranih vzorcev nerjavnega jekla AISI 316L. Spremljala sem omočljivost lasersko teksturiranih vzorcev brez nanosov ter z nanosi epoksidne smole in epoksidne smole z nanovključki FAS-TiO2 pri sobnih pogojih ter pri zmanjšanima zračnem tlaku in vlagi. Z meritvami kontaktnih kotov vodnih kapljic sem določila omočitvene lastnosti površin ter njihovo površinsko energijo. Z optično profilometrijo in vrstično elektronsko mikroskopijo sem analizirala hrapavost in morfologijo površin različno obdelanih vzorcev. Rezultati so pokazali, da lahko superhidrofobnost jekla dosežemo posredno s staranjem lasersko teksturirane površine z ustreznimi parametri ali pa neposredno z nanosi epoksidne smole z nanovključki FAS-TiO2. Zračna tlak in vlaga vplivata na spremembe omočljivosti lasersko teksturiranega jekla brez nanosov, na omočitvene lastnosti lasersko teksturiranih vzorcev z nanosi pa nimata vpliva. Pokazala sem, da je laserska obdelava učinkovita metoda za modifikacijo morfologije površin in s tem njihove omočljivosti.

Keywords

jeklo;omočljivost;lasersko teksturiranje;polimerne prevleke;staranje;

Data

Language:	Slovenian
Year of publishing:	2018
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FMF - Faculty of Mathematics and Physics
Publisher:	[T. Sever]
UDC:	620.1
COBISS:	3211876
Views:	1006
Downloads:	438
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Influence of aging on surface properties of laser textured and chemically modified surfaces
Secondary abstract:	This work presents the results of a three-month observation of wetting properties of differently laser-textured stainless steel AISI 316L. The samples were prepared uncoated, coated with epoxy resin, and with epoxy resin composite with inlcusion of FAS-TiO2 nanoparticles. The measurements were performed on samples kept under ambient conditions, and in conditions with reduced air pressure and humidity. Static water contact angles were measured and surface energy was calculated to evaluate surface wetting properties. Optical profilometry and scanning electron microscopy were used to analyze the roughness and morphology of laser-textured steel surfaces. The results have shown that superhydrophobicity of steel can be achieved either indirectly by aging the appropriately laser-textured surface, or directly by application of the epoxy resin composite with FAS-TiO2 nanoparticles. Ambient conditions have a significant impact on changes of wettability of laser-textured steel without coatings, but they do not affect the aging of additioanlly coated surfaces. I have shown that laser processing is an effective method for modifying surface morphology and, consequently, its wettability.
Secondary keywords:	steeel;wettability;laser texturing;polymer coatings;aging;
Type (COBISS):	Final paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Fak. za matematiko in fiziko, Oddelek za fiziko
Pages:	35 str.
ID:	10942517