Hidrofobizacija površine polimera

master's thesis

• Title (english): Polymer surface hydrophobization
• Author: Viktorija Katušić
• Mentor: Domagoj Vrsaljko (mentor)
• Committee member: Domagoj Vrsaljko (predsjednik povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Committee member: Igor Dejanović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-07-02, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Basic Technical Sciences

Abstract

Svrha rada bila je istražiti mogućnost modifikacije površine polimera njihovom obradom komercijalnim sredstavima koja su dostupna u svakodnevnoj upotrebi. Modificirane su površine sljedećih polimera: polietilen niske gustoće (PE-LD), polietilen visoke gustoće (PE-HD), polilaktid (PLA), cikloolefinski kopolimer (COC), te materijali koji služe za izradu oblika aditivnom proizvodnjom, a nalaze se u obliku filamenata: poli(etilen-tereftalat)-glikol (PET-G) proizvođača Devil Design, F41 FLEXTM te F43 TOUGHTM proizvođača Forefront, te Z-GLASS proizvođača Zortrax. Osim ovih materijala, korištena je i smola trgovačkog naziva Clear, proizvođača Formlabs koja se koristi kao materijal za aditivnu proizvodnju stereolitografijom. Komercijalna sredstva korištena za obradu površine su sprejevi Bama Power Protector i AntiAqua, pjena Nano Vario, tekućine Rain-X i Bison Enamel Fix te 9HMR-FiX premaz. Prvenstveni cilj modifikacije površine bio je povećati njezinu hidrofobnost. Hidrofobne su one površine čiji je kontaktni kut s vodom veći od 90°, dok se površine čiji je kontaktni kut s vodom manji od 90° nazivaju hidrofilnima. Kontaktni kut se definira kao kut koji zatvara tangenta povučena na rub kapi tekućine i površina na kojoj se kap nalazi. Tijekom eksperimenta mjeren je kontaktni kut čiste, kao i obrađenih površina materijala s vodom, formamidom i dijodometanom te je iz dobivenih rezultata izračunata slobodna površinska energija. Snimljeni su spektri infracrvenom spektroskopijom s Fourierovom transformacijom svakog pojedinog sredstva korištenog za modifikaciju površine, kao i samih površina materijala sa i bez nanešenog sredstva. Kao zadovoljavajuća sredstva za modifikaciju pokazali su se Bama Power Protector sprej te impregnacijska pjena trgovačkog naziva Nano Vario, pa je ispitan utjecaj obrade površine tim sredstvima na stvaranje kapljica pri izlasku u reaktorima proizvedenim na 3D-pisaču Form2. Obrada površine u nekim je reaktorima utjecala na izgled i homogenost kapljica.

Abstract (english)

The aim of this study was to explore the possibility of modifying the surface of the polymers by commercial agents that are available in everyday use. The following materials were used: low density polyethylene (PE-LD), high density polyethylene (PE-HD), polylactide (PLA), cycloolefinic copolymer (COC), and materials that are used in additive manufacturing and are in the form of filaments: poly(ethylene terephthalate)-glycol (PET-G) produced by Devil Design, F41 FLEXTM and F43 TOUGHTM, produced by Forefront and Z-GLASS produced by Zortrax. CLEAR resin, produced by Formlabs, was also used to examine the possibility of modifying its surface. This resin is used as additive manufacturing material by stereolithografy. Commercial agents used for surface treatment are sprays Bama Power Protector and AntiAqua, Nano Vario foam, Rain-X and Bison Enamel Fix and 9HMR-FiX coating. The primary purpose of surface modification was to increase its hydrophobicity. Hydrophobic are those surfaces whose contact angle with water is greater than 90°, while surfaces with a contact angle less than 90° are called hydrophilic. The contact angle is defined as the angle that closes the tangent withdrawn to the edge of the liquid drop and the surface on which the drop is located. During the experiment, the contact angle of cleaned, as well as the treated surfaces of the material with water, formamide and diiodomethane was measured, and from the obtained results the free surface energy was calculated. The FTIR (Fourier transformation infrared spectroscopy) spectra of each individual agent used for surface modification, as well as the surface area of the material with and without the applied agent were recorded. As satisfactory modification agents, Bama Power Protector spray and Nano Vario commercial impregnation foam have been shown, and the effect of surface treatment of these agents on the formation of droplets at the output of the reactors produced on the 3D Form2 printer was investigated. Surface treatment in some reactors influenced the appearance and homogeneity of droplets.

• Keywords: polimeri; hidrofobizacija; obrada površine; aditivna proizvodnja; kontaktni kut; slobodna površinska energija
• Keywords (english): polymers; hydrophobization; surface modification; additive manufacturing; contact angle; surface free energy
• Language: croatian
• URN:NBN: urn:nbn:hr:149:922014
• Project: Number: UIP-2014-09-3154; Title: Razvoj materijala za 3D tiskanje mikroreaktora; Title: Development of materials for 3D printing of microreactors; Acronym: 3Dmicroreactors; Leader: Domagoj Vrsaljko; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• 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: 2022-02-21 14:49:17