Obrada površine polimera silanima

undergraduate thesis

• Title (english): Silane surface treatment of polymers
• Author: Anamarija Havliček
• Mentor: Domagoj Vrsaljko (mentor)
• Committee member: Domagoj Vrsaljko (predsjednik povjerenstva)
• Committee member: Zana Hajdari Gretić (član povjerenstva)
• Committee member: Jelena Macan (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Silani su silicijevi spojevi koji se koriste za obradu raznih površina jer zbog svoje specifiĉne strukture mogu reagirati s anorganskim supstratima ili sami sa sobom. Silani se pomoću reakcija hidrolize i kondenzacije veţu na tretirane površine. Silanska sredstva za vezivanje omogućuju modifikaciju hidrofobnih ili hidrofilnih svojstava površina. Hidrofobnost i hidrofilnost se određuje mjerenjem kontaktnog kuta kapljice vode s površinom, ako je kontaktni kut (θ) veći od 90° površina je hidrofobna, a ako je manji od 90° površina je hidrofilna. Silanska sredstva za vezivanje koriste za u mnogim primjenama, a njihova osnova uloga je poboljšanje svojstava krajnjeg proizvoda. Cilj ovoga rada bio je ispitati utjecaj pojedinih silana na površinska svojstva stakla i polimera. Uzorcima stakla, PE-HD, PE-LD, PLA, ABS umakanjem u Evonikove silane Dynasylan SIVO 121, Dynasylan SIVO 160, Dynasylan SIVO 214, Dynasylan SIVO CLEAR K2, Dynasylan DAMO, Dynasylan 40, Dynasylan 6598, Dynasylan 6490, Dynasylan 6498 promijenjena su površinska svojstva. Na pripremljenim uzorcima mjereni su kontaktni kutovi te je određeno je li površina hidrofobna ili hidrofilna. Na temelju provednog ispitivanja zaključeno je da se pomoću navedenih silana mogu modificirati površinska svojstva stakla i polimera.

Abstract (english)

Silanes are silicon based compounds used for the treatment of various surfaces. Because of their specific structure they can react with inorganic substrates or between themselves. By the reactions of hydrolysis and condensation silanes bind to the treated surface. Silane coupling agents allow the modification of hydrophobic or hydrophilic properties of surfaces. Hydrophilicity is determined by measuring the contact angle of water droplets on the substrate surface, if the contact angle (θ) is greater than 90° the surface is hydrophobic, but if it is smaller than 90° the surface is hydrophilic. Silane coupling agents are used for many applications, but their base role is to improve the properties of the end product. The aim of this study was to investigate the influence of certain silanes on the surface properties of glass and polymers. Samples of glass, PE-HD, PE-LD, PLA, ABS were dipped in Evonik silanes Dynasylan SIVO 121, Dynasylan SIVO 160, Dynasylan SIVO 214, Dynasylan SIVO CLEAR K2, Dynasylan DAMO, Dynasylan 40, Dynasylan 6598, Dynasylan 6490, Dynasylan 6498 and their surface properties were modified. Contact angles were measured on the prepared samples. After completing the experiment, it was concluded that by using this silanes surface properties of glass and polymers can be modified.

• Keywords: silanska sredstva za vezivanje; hidrofobnost; hidrofilnost; kontaktni kut
• Keywords (english): silane coupling agents; hydrophilic; hydrophobic; contact angle
• Language: croatian
• URN:NBN: urn:nbn:hr:149:477145
• 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
• Repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb
• Created on: 2017-12-11 08:28:45