Verbesserung von Kunstharzbeschichtungen durch Nanopartikel mit maßgeschneiderter Oberflächenmodifizierung

Abstract

Polymere Nanokomposite erfahren heutzutage zunehmende Bedeutung für die Erzeugung funktioneller Beschichtungen. Zu diesem Zweck werden maßgeschneiderte modifizierte Nanopartikel in eine Harzmatrix eingebracht und die Eigenschaften einer so erzeugten Beschichtung wesentlich verbessert. In dieser Arbeit wird der Zusammenhang der gesamten Prozesskette, von der Synthese bis zur Charakterisierung der Schichten, mit besonderem Blick auf die partikuläre Oberflächenchemie untersucht. Auf diese Weise kann dieser Einfluss aus einer Hand überprüft und Randeffekte weitgehend vermieden werden.Schlagwörter: Easy-to-clean, Nanokomposite, Oberflächenchemie, Partikelmodifizierung, Prozesskette Improvement of Surface Properties of Polymeric Coatings by Nanoparticles with Tailored Surface ModificationToday, polymer nanocomposites are of growing interest for the production of functional coatings. For this purpose, tailored and surface-modified nanoparticles are incorporated into a polymeric resin. Thereby, the characteristics of the used system can be altered and desired properties can be enhanced. In this work, the whole process chain, from synthesis to characterization of the coating, was examined with special attention to the surface chemistry of the nanoparticles. Hereby, the influence of the surface modification of the particles can be investigated while avoiding side effects.

Preparation of Self-Assembled Nanoparticle–Polymer Hybrids from Modified Silica Nanoparticles and Polystyrene-Block-Polyacrylic Acid Vesicles via the Co-Precipitation Method

“…Overall, we could detect a mass loss of 13.5% for the particles modified with APTES, of 17.7% for the particles modified with APTES–hexanoic acid, of 18.4% for the particles modified with APTES–octanoic acid, and of 19.4% for the particles modified with APTES–decanoic acid. Accordingly, analogous to other literature sources [ 65 , 91 , 92 ], a trend emerged that the higher the molecular weight, the higher the mass loss. In our specific case, it was even possible to determine a direct linear relationship between the molecular weight of the modifier and the mass loss.…”

“…As diverse as the encapsulation methods are the types of embedded nanoparticles. Some well-studied nanomaterials so far are gold, silver, iron oxide, and aluminum oxide nanoparticles, which are primarily used because of their properties, such as magnetism [ 17 , 63 , 64 , 65 , 66 ]. To the best of our knowledge, there is currently no publication in which silica nanoparticles are encapsulated in self-assembled mesoscopic block copolymer structures such as vesicles using the co-precipitation method applied here.…”

“…Due to its similar surface chemistry, silica serves as a model particle system for metal oxides. For example, Kockmann et al [ 65 , 72 , 85 ] have already shown that metal oxide nanoparticles of ZrO 2 and Al 2 O 3 can be hydrophobized and incorporated into a polymer matrix using the functionalization method applied here. Thus, it is expected that the findings reported in this study are transferable to other metal oxide systems.…”