Synteza, właściwości fizykochemiczne oraz aktywność biologiczna i antykorozyjna nowych oligomerycznych surfaktantów alkiloamoniowych
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Date
2019
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Synthesis, physicochemical properties, biological and anticorrosion activity of new oligomeric alkylammonium surfactants
Abstract
Prezentowana praca doktorska zawiera badania interdyscyplinarne łącząc chemię organiczną, chemię analityczną, elektrochemię oraz mikrobiologię. W pierwszym etapie badań zsyntezowano nowe oligomeryczne surfaktanty oraz przedstawiono charakterystykę spektroskopową. Drugi etap badań przedstawia właściwości fizykochemiczne badanych surfaktantów. Wyznaczono CMC oraz zbadano korelację pomiędzy strukturą a agregacją
w roztworach wodnych. Na podstawie zebranych wyników wybrane surfaktanty poddano testom korozyjnym wobec stali węglowej oraz stali nierdzewnej. Czas imersji w roztworze elektrolity z oraz bez dodatku surfaktantu wynosił 24 h oraz tydzień. Wszystkie testowane surfaktanty wykazały znaczną efektywność hamowania korozji. Wyznaczono MIC (Minimalne Stężenie Hamujące) wobec bakterii, drożdży oraz grzybów. Biorąc pod uwagę znaczną aktywność antykorozyjną oraz biologiczną, kolejnym aspektem badań było badanie hamowania biokorozji przez surfaktanty.
W ostatnim etapie badań immobilizowano surfaktanty w kaspuły silikonowe oraz żelatynowe w celu modyfikacji powłok antykorozyjnych.
The presented doctoral dissertation includes interdisciplinary research combining organic chemistry, analytical chemistry, electrochemistry and microbiology. In the first stage of research, new oligomeric surfactants were synthesized and spectroscopic characteristics were presented. The second stage of research presents the physicochemical properties of the surfactants tested. CMC was determined and the correlation between structure and aggregation was examined in aqueous solutions. Based on the collected results, selected surfactants were subjected to corrosion tests against carbon steel and stainless steel. The immersion time in the solution of electrolytes with and without the addition of surfactant was 24 hours and a week. All tested surfactants showed significant corrosion inhibition efficiency. The MIC (Minimum Inhibitory Concentration) was determined against bacteria, yeast and fungi. Given the significant anti-corrosive and biological activity, another aspect of the study was the study of inhibition of biocorrosion by surfactants. In the last stage of research, surfactants were immobilized into silicone and gelatin capsules to modify anti-corrosion coatings.
The presented doctoral dissertation includes interdisciplinary research combining organic chemistry, analytical chemistry, electrochemistry and microbiology. In the first stage of research, new oligomeric surfactants were synthesized and spectroscopic characteristics were presented. The second stage of research presents the physicochemical properties of the surfactants tested. CMC was determined and the correlation between structure and aggregation was examined in aqueous solutions. Based on the collected results, selected surfactants were subjected to corrosion tests against carbon steel and stainless steel. The immersion time in the solution of electrolytes with and without the addition of surfactant was 24 hours and a week. All tested surfactants showed significant corrosion inhibition efficiency. The MIC (Minimum Inhibitory Concentration) was determined against bacteria, yeast and fungi. Given the significant anti-corrosive and biological activity, another aspect of the study was the study of inhibition of biocorrosion by surfactants. In the last stage of research, surfactants were immobilized into silicone and gelatin capsules to modify anti-corrosion coatings.
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Wydział Chemii
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Keywords
surfaktanty, surfactants, korozja, corrosion, kapsuły, capsules, micele, micelles, biodegradacja, biodegradation