Synthesis and characterization of poly(fluorinated acrylate)/silica hybrid nanocomposites

Abstract

The nanocomposite particles (NPs) with inorganic silica as core and fluorinated polymer shell have been in situ synthesized via emulsion polymerization. The chemical composition and core-shell structure were characterized by Fourier-transform infrared spectrometry and transmission electron microscopy. The results showed that silica nanoparticles were encapsulated in latex particles, with single-and multicore morphologies coexisting. Thermal gravimetric analysis also suggested the successful encapsulation of silica into NPs with enhanced thermal stability. The surface properties of the latex films produced from the core-shell particles were also investigated by contact angle method and water absorption measurement. Both fluorinated polymer and silica contributed to less water absorption ratio and lower surfacefree energy, which was composed of larger polar component and smaller disperse component, just reversed as usual.

Synthesis, film morphology, and performance of cationic fluorinated polyacrylate emulsion with core‐shell structure

“…Up to date, fluorinated acrylate polymers emulsions with various structures, such as graft,7 random,8 hybrid nanocomposites,9 and core‐shell,4, 10–12 can be synthesized by conventional emulsion polymerization, suspension–emulsion combined polymerization, mini emulsion polymerization, seeded emulsion polymerization, and other synthetic polymerization techniques. Core‐shell fluorinated polyacrylate latex synthesized via seeded emulsion polymerization was particularly attractive as a result of their typical advantage in film formation compared with general emulsion, especially the latex consisting of fluorine‐free acrylic core and fluorine‐containing acrylic shell.…”

Fabrication and properties of chemically bonded polysilsesquioxane‐polyacrylate/silica hybrid latex films with high silicon content

“…On the other hand, it was inevitable the silica agglomeration occurred at high silica content, especially at the condition silica/PSQ‐PA ratio >50 wt%, The agglomeration would affect the morphology and size of the PSQ‐PAS particles. Meanwhile, the incorporation of silica particles would produce protuberance on the surface of PSQ‐PAS hybrid film, resulting in the increase of surface roughness . Therefore, it was reasonable the film transmittance of PSQ‐PAS film decreased with silica/PSQ‐PA ratios increasing.…”

Creation of coating surfaces possessing superhydrophobic and superoleophobic characteristics with fluoroalkyl end-capped vinyltrimethoxysilane oligomeric nanocomposites having biphenylene segments

“…Therefore, it is of particular interest to develop novel fluorinated polymers/organic-bridged silica nanocomposite materials possessing not only a surface-active characteristic imparted by fluorine but also a unique property related to organic-bridged silica hybrids, from the developmental viewpoints of new fluorinated polymeric hybrid materials. There have been some reports on the preparation of fluorinated polymers/silica hybrid nanocomposites such as poly[fluorinated (meth)acrylate]/silica hybrid nanocomposites [6], perfluoropolyether-based silica hybrids [7], poly(vinylidene fluoride-co-hexafluoropropylene) copolymer/silica composites containing sulfonic acid groups [8], poly(vinylidene fluoride-ter-perfluoro(4-methyl-3,6-dioxaoct-7-ene sulfonyl fluoride)-ter-vinyltriethoxysilane) terpolymer/silica composites [9], hexafluoropropylene oxide oligomers grafted silica nanocomposites [10], poly(vinylidene fluoride)/silica hybrids [11], fluorinated polyimide/silica composites [12], and poly(tetrafluoroethylene)/ silica hybrids [13], Nafion TR resin/silica composites [14], and fluoroalkyl end-capped oligomers/silica nanocomposites [15]; however studies on the fluorinated polymers and organic-bridged silica hybrid composites have been hitherto very limited. Among these fluorinated polymers, fluoroalkyl end-capped oligomers are attractive functional fluorinated materials, because they exhibit a variety of unique properties such as high solubility, surface active properties, biological activities and nanometer size-controlled selfassembled molecular aggregates which cannot be achieved by the corresponding non-fluorinated and randomly fluoroalkylated ones [16].…”