Vpliv laserske in kemične obdelave bakrenih površin na kapilarni vlek vode in etanola

Tuvić, Kristian (author), Može, Matic (mentor), Golobič, Iztok (comentor)

V zaključni nalogi smo obravnavali vpliv laserske in kemične obdelave bakrenih površin na kapilarni vlek vode in etanola. Bakrene površine smo lasersko strukturirali pri različnih razmikih med laserskimi linijami in hitrostih skeniranja ter jih kemično funkcionalizirali s 3-fosfonopropionsko kislino (FPK) in PEG-silanom (PEGS). Kapilarni vlek smo ovrednotili z lastnim merilnim sistemom, ki temelji na industrijski kameri in računalniški analizi videoposnetkov v programskem jeziku Python. Rezultati so pokazali, da kemijska funkcionalizacija pomembno vpliva na kapilarni vlek vode, medtem ko je pri etanolu prevladoval vpliv lasersko izdelane mikrostrukture. Med preučevanima prevlekama se je FPK izkazala za učinkovitejšo, saj je omogočila hitrejši in bolj ponovljiv kapilarni vlek ter dobro temperaturno obstojnost. Razmik med laserskimi linijami in hitrost skeniranja sta pomembno vplivala na kapilarni transport, pri čemer smo med preizkušenimi parametri najugodnejše rezultate dosegli pri razmiku kanalov 40 μm in hitrosti skeniranja pri laserski obdelavi 165 mm/s. Ugotovitve predstavljajo osnovo za nadaljnjo optimizacijo lasersko strukturiranih in kemično funkcionaliziranih bakrenih površin za pasivni transport kapljevin.

• Language: Slovenian
• Keywords: Kapilarni vlek, omočljivost površin, lasersko strukturiranje, kemična funkcionalizacija, superhidrofilne površine.
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [K. Tuvić]
• Year: 2026
• Number of pages: XIII, 59 f.
• PID: 20.500.12556/RUL-186683
• UDC: 621.9.048.7:544.722.3:546.56(043.2)
• COBISS.SI-ID: 290017027
• Publication date in RUL: 04.09.2026

Secondary language

• Language: English
• Title: Effect of laser and chemical surface treatment of copper surfaces on capillary wicking of water and ethanol

Abstract

In this thesis, we investigated the effects of laser processing and chemical functionalization of copper surfaces on the capillary wicking of water and ethanol. Copper surfaces were laser structured using different laser line spacings and scanning speeds and subsequently chemically functionalized with 3-phosphonopropionic acid (FPK) and PEG-silane (PEGS). Capillary wicking was evaluated using a custom-developed measurement system based on an industrial camera and computer-assisted video analysis in Python. The results showed that chemical functionalization significantly affected the capillary wicking of water, whereas for ethanol, the laser-induced microstructure had the predominant influence. Of the two coatings investigated, FPK proved to be more effective, providing faster and more repeatable capillary wicking as well as good thermal stability. Laser line spacing and scanning speed significantly affected capillary transport, with the most favorable results among the tested parameters obtained at a channel spacing of 40 μm and a laser scanning speed of 165 mm/s. The findings provide a basis for further optimization of laser-structured and chemically functionalized copper surfaces for passive liquid transport applications.

• Keywords: Capillary wicking, surface wettability, laser texturing, chemical functionalization, superhydrophilic surfaces.