The aim of this thesis is to study and analyze the influence of polymers containing nitrogen-polar groups over hydrophilic properties during coating formulation. For industrial uses, it is not possible to use a pure polymer as a coating due to its low stability and poor resistance properties. In order to grant these durability properties, the polymer needs to be mixed with a resin. To create a proper formulation, several experiments were carried out aiming to obtain a thin hydrophilic surface with a low contact angle. Many different types of materials like hydrophilic polymers, resin, carrier liquids and surfactants have been employed during this work: polyacrylamide, poly (acrylamide-co-diallyldimethylammonium chloride) solution, poly (acrylamide-co-acrylic acid) partial sodium salt, and polyvinylpyrrolidone as hydrophilic polymers promoters, epoxy resin as binder, sodium dodecyl sulfate and a polymer with commercial name T588 as surfactants. Parameters like water, epoxy, polymer and surfactant quantity were modified to produce a layer with hydrophilic characteristics. The test most used during this experimental work, was the water contact angle analysis. In this way, it was possible to choose which formulation showed the best performance and to understand how the contact angle behaves according to the modification performed. It was possible to observe different trends for different parameters which allowed the optimization of the initial formulation improving significantly the hydrophilic value. Besides the contact angle analysis, tests like TGA, DSC, DTA and FTIR were carried out in order to characterize the different materials used and films obtained. The hydrophilic polymers were used in order to observe the influence of their nitrogen-polar groups inside the hydrophilic behavior of the surface.
Lo scopo di questa tesi è studiare e analizzare l'influenza di polimeri contenenti gruppi azoto-polari sulle proprietà idrofiliche durante la formulazione del rivestimento. Per gli usi industriali, non è possibile utilizzare un polimero puro come rivestimento a causa della sua bassa stabilità e delle scarse proprietà di resistenza. Per garantire queste proprietà di durabilità, il polimero deve essere miscelato con una resina. Per creare una formulazione corretta, sono stati condotti diversi esperimenti con l'obiettivo di ottenere una superficie idrofilica sottile con un angolo di contatto basso. Durante questo lavoro sono stati impiegati molti tipi diversi di materiali, come polimeri idrofilici, resina, liquidi di trasporto e tensioattivi: poliacrilammide, soluzione di poli (acrilammide-co-diallildimetilammonio), poli (acrilammide-co-cido acrilico) sale di sodio parziale e polivinilpirrolidone come promotori di polimeri idrofilici, resina epossidica come legante, sodio-dodecil-solfato e un polimero con nome commerciale T588 come tensioattivi. Parametri come la quantità di acqua, resina epossidica, polimero e tensioattivo sono stati modificati per produrre uno strato con caratteristiche idrofiliche. Il test più utilizzato durante questo lavoro sperimentale è stato l'analisi dell'angolo di contatto con l'acqua. In questo modo, è stato possibile sia scegliere quale formulazione abbia mostrato le migliori prestazioni sia capire come si comporta l'angolo di contatto in base alle modifiche eseguite. È stato possibile osservare diverse tendenze per diversi parametri, le quali hanno permesso l'ottimizzazione della formulazione iniziale migliorando significativamente il valore idrofilico. In aggiunta all'analisi dell'angolo di contatto, sono stati eseguiti test come TGA, DSC, DTA e FTIR per caratterizzare i diversi materiali utilizzati e le pellicole ottenute. Polimeri idrofilici sono stati utilizzati per osservare l'influenza di tali gruppi sul comportamento idrofilico della superficie.
Polymers containing N-polar groups as hydrophilic promoters
HIGUERAS, DANIEL ENRIQUE
2017/2018
Abstract
The aim of this thesis is to study and analyze the influence of polymers containing nitrogen-polar groups over hydrophilic properties during coating formulation. For industrial uses, it is not possible to use a pure polymer as a coating due to its low stability and poor resistance properties. In order to grant these durability properties, the polymer needs to be mixed with a resin. To create a proper formulation, several experiments were carried out aiming to obtain a thin hydrophilic surface with a low contact angle. Many different types of materials like hydrophilic polymers, resin, carrier liquids and surfactants have been employed during this work: polyacrylamide, poly (acrylamide-co-diallyldimethylammonium chloride) solution, poly (acrylamide-co-acrylic acid) partial sodium salt, and polyvinylpyrrolidone as hydrophilic polymers promoters, epoxy resin as binder, sodium dodecyl sulfate and a polymer with commercial name T588 as surfactants. Parameters like water, epoxy, polymer and surfactant quantity were modified to produce a layer with hydrophilic characteristics. The test most used during this experimental work, was the water contact angle analysis. In this way, it was possible to choose which formulation showed the best performance and to understand how the contact angle behaves according to the modification performed. It was possible to observe different trends for different parameters which allowed the optimization of the initial formulation improving significantly the hydrophilic value. Besides the contact angle analysis, tests like TGA, DSC, DTA and FTIR were carried out in order to characterize the different materials used and films obtained. The hydrophilic polymers were used in order to observe the influence of their nitrogen-polar groups inside the hydrophilic behavior of the surface.File | Dimensione | Formato | |
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https://hdl.handle.net/10589/145242