Metode za izdelavo mikropretočnih sistemov

Pavlič, Simon (author), Gros, Nataša (mentor)

Mikropretočni sistemi izdelani s tehnologijo nalaganja s spajanjem imajo slabo resolucijo. Ker se plasti zaradi mehanske omejitev tiskalnika ne morajo poravnati, pride do tako imenovanega stopničastega vzorca pri poševnih površinah, med samimi plastmi pa nastanejo vrzeli. Hrapavost površine lahko zmanjšamo z izbiro pravih parametrov tiskanja, ali z obdelavo s primernim topilom. Topilo raztopi vrhnjo plast materiala. Zmes polimera in topila pa zapolni vrzeli med plastmi. Ta koncept smo uporabil za glajenje površine enostavnega Y čipa, narejenega iz polimera mlečne kisline (PLA). Uporabili smo pare etil acetata. Obdelava je trajala 5 minut. Primerjali smo razmerje mešanja barvil pred obdelavo in to na razdalji 3 mm od stičišča. Ugotovili smo, da takšen način obdelave ni primeren za mikropretočne sisteme.

• Language: Slovenian
• Keywords: mikropretočni sistem, nalaganje s spajanjem, polimer mlečne kisline, obdelava
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2021
• PID: 20.500.12556/RUL-129971
• COBISS.SI-ID: 81972995
• Publication date in RUL: 09.09.2021

Secondary language

• Language: English
• Title: Methods for fabrication of microfluidic systems

Abstract

Microfluidic systems made with fused deposition modeling printer have poor resolution. Because the layers are not aligned due to the mechanical limitations of the printer, a so-called ridge pattern occurs on inclined surfaces and (ridge pattern) between the layers. However surface roughness can be reduced with right parameters or post processing. Suitable solvent can melt top layer of material. Slurry than fills the gaps between the layers. we used this concept to treat a simple Y chip made from polylactic acid (PLA) with ethyl acetate vapor for 5 minutes. We compared dye mixing ratios before and after processing 5 mm away from intersection. Flow in chip was observed with digital camera. We found out that this method is not suited for microfluidic devices.

• Keywords: microfluidic system, fused deposition modelling, polylactic acid, post treatment