Optimiranje postupka obrade površine polimera silanima

undergraduate thesis

• Title (english): Optimization of silane surface treatment of polymers
• Author: Viktorija Katušić
• Mentor: Domagoj Vrsaljko (mentor)
• Committee member: Domagoj Vrsaljko (predsjednik povjerenstva)
• Committee member: Zrinka Buhin Šturlić (član povjerenstva)
• Committee member: Zvonimir Katančić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2017-07-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Basic Technical Sciences; Materials

Abstract

Cilj rada bio je istražiti mogućnost modifikacije površine pojedinih polimera i stakla silanima. Silani, kao silicijevi spojevi, imaju različitu primjenu. Prvenstveno se koriste kao vezujuća sredstva, sredstva za umrežavanje te kao modifikatori površinskih svojstava nekih materijala. Ovisno o tome koji su atomi vezani na centralni atom silicija, razlikujemo silane, organosilane i polisilane. Za navedene primjene najčešće se koriste organosilani koji mogu reagirati i s anorganskim i s organskim površinama. Silani mogu mijenjati svojstva hidrofilnosti odnosno hidrofobnosti površine na koju se nanose. Ovo svojstvo određuje se mjerenjem kontaktnog kuta površine materijala s vodom. Kontaktni kut manji od 90° imaju hidrofilne površine, dok je površina koja ima konatktni kut veći od 90° hidrofobna. U ovom radu ispitana je mogućnost modifikacije površine polietilena niske gustoće (PE-LD), polietilena visoke gustoće (PE-HD), polilaktida (PLA), akrilonitril/butadien/stirena (ABS) i stakla. Primjenjeni su silani tvrtke Evonik, trgovačkih imena Dynasylan DAMO, Dynasylan SIVO 160, Dynasylan 6490 i Dynasylan SIVO 214. Površine navedenih polimera obrađene su umakanjem u čiste silane, smjesu vode i silana (omjer 1:1) i u 2 %-tnu otopinu silana u etanolu te je nakon obrade i sušenja izmjeren kontaktni kut iz čega je donesen zaključak da se površine nekih od ispitivanih uzoraka mogu modificirati s primjenjenim silanima.

Abstract (english)

The aim of this study was to investigate the possibility of modifying the surface of certain polymers and glass with silanes. Silanes, as silicon compounds, have different applications. They are primarily used as coupling agents, crosslinking agents, and as surface modifiers of some materials. Depending on which atoms are attached to the central atom of silicon we distinguish silanes, organosilanes and polysilanes. For the aforementioned applications, organosilans which can react both with inorganic and organic surfaces are most often used. Silanes can alter the properties of surface hydrophilicity or hydrophobicity. This property is determined by measuring the contact angle of the material surface with water. A contact angle of less than 90° indicates a hydrophilic surface, while the surface having a contact angle greater than 90° is hydrophobic. In this study we have investigated the possibility of surface modification of low density polyethylene (PE-LD), high density polyethylene (PE-HD), polylactide (PLA), acrylonitrile/butadiene/styrene (ABS) and glass. Evonik silanes, which have commercial names Dynasylan DAMO, Dynasylan SIVO 160, Dynasylan 6490, and Dynasylan SIVO 214 were used. Surfaces of said polymers were processed by dipping in pure silane, blend of water and silane (1:1 ratio) and 2 % silane in ethanol solution and after treatment and drying, a contact angle was measured from which the conclusion was reached that the surfaces of some of the tested samples can be modified with the applied silanas.

• Keywords: silani; sredstvo za umrežavanje; vezujuće sredstvo; modifikacija površine; hidrofilnost; hidrofobnost; kontaktni kut
• Keywords (english): silanes; crosslinking agent; coupling agent; surface modification; hydrophilicity; hydrophobicity; contact angle
• Language: croatian
• URN:NBN: urn:nbn:hr:149:899732
• Study programme: Title: Materials Science and Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-12-15 11:10:23