Senzorski filmovi na osnovi metil crvenog za primjenu u mikroreaktorima

master's thesis

• Title (english): Methyl red-based sensor films for use in microreactors
• Author: Katarina Marija Drmić
• Mentor: Domagoj Vrsaljko (mentor)
• Committee member: Domagoj Vrsaljko (predsjednik povjerenstva)
• Committee member: Mirela Leskovac (član povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Cilj ovoga rada je bio dizajnirati pločice i milireaktore od polipropilena na FFF 3D-pisaču. Zatim pločice i kanale milireaktora prevući senzorskom prevlakom koja se prethodno pripremi sol-gel metodom. Senzorski filmovi pripremili su se upotrebom tetraetoksisilana, TEOS i feniltrimetoksisilana FTMS kao prekursora za sol-gel metodu, etanola kao otapala, metil crvenog kao pH indikatora i klorovodične kiseline, HCl-a, kao katalizatora reakcije. Pločice su uspješno izrađene na 3Dpisaču, te su senzori na površini pločica pokazivali odziv, odnosno došlo je do promjene boje senzorskih filmova. Milireaktori su također pokazivali odziv, došlo je do promjene boje senzorskih filmova u kanalima milireaktora, u odnosu na pH-vrijednost. Promjena boje senzorskih filmova nije bila vidljiva golim okom no putem RGB softvera za analizu boje primijećen je trend RGB vrijednosti u odnosu na pH. Entalpija taljenja te temperatura taljenja je veća kod polipropilena koji je bio u formi granula, u odnosu na polipropilen proizvođača BASF, koji se koristio za 3D-ispis pločica i milireaktora, koji je u formi filamenta. Mjerenjem kontaktnog kuta zaključeno je da se hidrofobnost pločica smanjuje upotrebom senzorskih filmova. FTIR analizom pločica sa i bez senzorskog filma potvrđena je prisutnost funkcionalnih grupa polipropilena. Analizom pločica sa senzorskim filmom pronađene su funkcionalne skupine silanskih prekursora koji su se koristili za izradu filmova.

Abstract (english)

The aim of this work was to design plates and millireactors made of polypropylene on the FFF 3D printer. Then cover the plates and channels of the millireactor with a sensor coating that is previously prepared using the sol-gel method. The sensor films were prepared using tetraethoxysilane, TEOS, and phenyltrimethoxysilane, FTMS as a precursor for the sol-gel method, ethanol as a solvent, methyl red as a pH indicator, and hydrochloric acid, HCl, as a reaction catalyst. The plates were successfully made on a 3D printer, and the sensors on the surface of the plates showed a response, the color of the sensor films changed. The millireactors also showed a response, there was a change in the color of the sensor films in the channels of the millireactor, to the pH value. The change in color of the sensor films was not visible to the naked eye, but a trend of RGB values to pH was observed using the RGB color analysis software. Melting enthalpy and melting temperature are higher with polypropylene that was in the form of granules compared to the polypropylene produced by BASF that was used for 3D printing of plates and millireactors, which is in the form of filaments. By measuring the contact angle, it was concluded that the hydrophobicity of the plates decreases with the use of sensor films. FTIR analysis of plates with and without sensor film confirmed the presence of polypropylene functional groups. By analyzing the plates with the sensor film, the functional groups of the silane precursors that were used to make the films were found.

• Keywords: milireaktor; 3D-pisač; sol-gel metoda; senzorski filmovi; RGB vrijednost
• Keywords (english): milireactor; 3D-printer; sol-gel method; sensor films; RGB value
• Language: croatian
• URN:NBN: urn:nbn:hr:149:709660
• Project: Number: KK.01.1.1.04.0006; Title: Otpad i Sunce u službi fotokatalitičke razgradnje mikroonečišćivala u vodama; Acronym: OS-Mi; Leader: Ivana Grčić; Jurisdiction: Croatia; Funder: MZO; Funding stream: Nema
• Study programme: Title: Materials Science and Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-04-03 09:39:38