Utjecaj molarne mase polielektrolita na formiranje i svojstva ultra-tankih filmova poli(alilamin-hidroklorida) i poli(akrilne kiseline)

master's thesis

• Title (english): Influence of polyelectrolyte molar mass on formation and properties of poly(allylamine hydrochloride)7poly(acrylic acid) ultra-thin films
• Author: Matej Masjar
• Mentor: Davor Kovačević (mentor)
• Committee member: Davor Kovačević (predsjednik povjerenstva)
• Committee member: Željka Soldin (član povjerenstva)
• Committee member: Adriana Kenđel (član povjerenstva)
• Committee member: Tajana Begović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Chemistry); Zagreb
• Defense date and country: 2022-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Chemistry

Abstract

U ovom radu je istražen utjecaj molarne mase polielektrolita na formiranje i svojstva
polielektrolitnog višesloja poli(alilamin-hidroklorida) i poli(akrilne kiseline). U te svrhe
filmovi su pripravljeni s različitim kombinacijama molarnih masa polielektrolita sloj po sloj
metodom na površini silicijeva supstrata pri različitim eksperimentalnim uvjetima kako bi se
utjecalo na konformaciju polimernih lanaca. Elipsometrom je praćena debljina filma tijekom
njegove priprave, a mikroskopom atomskih sila je određena morfologija, hrapavost i poroznost
površine filma. Iz dobivenih podataka utvrđeno je da se povećanjem molarne mase
polielektrolita povećava debljina filma ako je barem jedan polielektrolit u globularnoj
konformaciji. Pokazano je da molarna masa polielektrolita nema značajni utjecaj na debljinu i
hrapavost filma ako su oba polielektrolita u izduženoj konformaciji. Otkrivena su i dva nova
načina priprave ultra-tankih filmova (d ≈ 2 nm) s poli(akrilnom kiselinom) male molarne mase.

Abstract (english)

In this study the influence of the polyelectrolyte molar mass on the formation and properties of
poly(allylamine hydrochloride)/poly(acrylic acid) polyelectrolyte multilayer was investigated.
For these purposes, films were prepared on the silicon substrate using layer by layer method
with different combinations of polyelectrolyte molar masses under different experimental
conditions in order to influence the conformation of the polymer chains. The thickness of the
film was monitored during its preparation with an ellipsometer and the morphology, roughness,
and porosity of the film surface were determined with an atomic force microscope. From
obtained data, it was established that by increasing the polyelectrolyte molar mass, the thickness
of the film increases if at least one polyelectrolyte is in globular conformation. On the other
hand, if both polyelectrolytes are in an elongated conformation, the polyelectrolyte molar mass
has no significant influence on the thickness and roughness of the film. Also, two new ways of
preparation of ultra-thin films (d ≈ 2 nm) were discovered by using poly(acrylic acid) of low
molar mass.

• Keywords: elipsometrija; mikroskopija atomskih sila; molarna masa; polielektrolitni višesloj
• Keywords (english): atomic force microscopy; ellipsometry; molar mass; polyelectrolyte multilayer
• Language: croatian
• URN:NBN: urn:nbn:hr:217:529992
• Project: Number: IPS-2020-01-6126; Title: Modulacija polifenolnog profila voća uslijed fizikalnih tretmana nakon branja; Title: Modulation of fruit polyphenolic profile by sustainable postharvest physical treatments; Leader: Davor Kovačević; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IPS
• Study programme: Title: Graduate university studies in chemistry; specializations in: Research programme; Course: Research programme; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access; Embargo expiration date: 2024-09-29
• Created on: 2022-10-25 12:55:22