Utjecaj hrapavosti površine na svojstva samoorganizirajućih monoslojeva organskih kiselina

undergraduate thesis

• Title (english): Influence of surface roughness on properties of self-assembled monolayers of organic acids
• Author: Mario Petričević
• Mentor: Helena Otmačić Ćurković (mentor)
• Committee member: Helena Otmačić Ćurković (predsjednik povjerenstva)
• Committee member: Suzana Sopčić (član povjerenstva)
• Committee member: Zana Hajdari Gretić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2016-09-07, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Chemical Engineering in Material Development

Abstract

Korozijsko djelovanje morskog okoliša štetno utječe na metalne konstrukcije, koje su sastavni dio svake industrije, te na taj način indirektno uzrokuje velike štete gospodarstvu. U današnje vrijeme razvijaju se nove metode zaštite metalnih konstrukcija, koje nisu štetne za morski okoliš i organizme u njemu. Jedna od tih metoda je modificiranje metalne površine tankim uređenim slojem organskih kiselina tzv. samoorganizirajućim monoslojem. U ovome radu se kao građevna jedinica monosloja koristila... More stearinska kiselina, koja se uranjanjem nanosila na površinu nehrđajućeg čelika te legure bakra i nikla. Ta dva metalna materijala se zbog svojih kemijskih, fizičkih i metalurških svojstava često primjenjuju u morskom okolišu. Cilj rada bio je ispitati utjecaj hrapavosti metalnih površina na adsorpciju stearinske kiseline i stvaranje kompaktnog i stabilnog samoorganizirajućeg monosloja. Uzorci metala različite hrapavosti sa nanesenim monoslojem stearinske kiseline podvrgnuti su elektrokemijskim ispitivanjima, elektrokemijske impedancijske spektroskopije, linearne polarizacije i Tafelove ekstrapolacije. Dobiveni rezultati pokazali su da se uređeniji monoslojevi stearinske kiseline stvaraju na manje hrapavim metalnim površinama. Less

Abstract (english)

Corrosivity of the marine environment has negative impacts on the metal structures that are the main component of every industry and thereby indirectly causes big losses to economy. Nowadays, new protection methods for metal constructions have been developed. Those methods are not harmful for a marine environment and its organisms. One of these methods is modification of metal surface with thin well ordered layer of organic acid, so called self-assembled monolayer. In this work stearic acid... More was used as the monolayer building block, which was applied on the stainless steel and copper and nickel alloy surface by dip coating technique. These two metallic materials have been frequently used in marine environment because of their chemical, physical and metallurgical performances. The aim of this work was to examine influence of roughness of metal surfaces on the stearic acid adsorption and the formation of compact and stable self-organized monolayer. Metal samples of different roughness with applied stearic acid monolayer were exposed to electrochemical examination by electrochemical impedance spectroscopy, linear polarization and Tafel extrapolation method. The final results showed that the ordered stearic acid monolayers were created on the less rough metal surfacecs. Less

• Keywords: nehrđajući čelik; legura bakar nikal; korozija; hrapavost; samoorganizirajući monoslojevi; stearinska kiselina; morska voda; elektrokemijska ispitivanja
• Keywords (english): stainless steel; copper nickel alloy; corosion; roughness; self-assembled monolayers; stearic acid; sea water; electrochemical examination
• Language: croatian
• URN:NBN: urn:nbn:hr:149:639563
• 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: 2018-02-02 11:49:06