Spherical and core-shell fluorinated polyacrylate latex particles: preparation and characterization

Abstract

Fluorinated polyacrylate particles with spherical (SP) and core-shell (CS) structures have been prepared via emulsion polymerization. Morphologies of SP and CS latex particles were observed by transmission electron microscope (TEM). The copolymer and the film were characterized by Fourier transform infrared spectroscopy (FT-IR), 19 F NMR, atomic force microscope (AFM), X-ray photoelectron spectroscopy (XPS), and thermogravimetry (TG-DSC) analyses. Fluorinated components in the copolymer were found to aggregate at the film surface, and the core-shell structure of latex particles contributes to occurrence of phase separation at the film surface. The film prepared from core-shell latex particles exhibits more satisfied water repellency than that obtained from spherical latex particles. Fluorine components at SP and CS film surfaces present significantly different aggregation behaviors.

Strategies to incorporate a fluorinated acrylate monomer into polymer particles: from particle morphology to film morphology and anticorrosion properties

“…Some works have identified the challenge of incorporating such hydrophobic monomers in emulsion polymerization (limited transport rate in the aqueous phase and poor colloidal stability yielding low conversions and large amounts of coagulum) and have used solvents to increase the hydrophobicity of the aqueous phase [4]. Also, fluorinated (reactive) surfactants have been used to increase the affinity with the FMA monomer and facilitate its incorporation [9,25]. Miniemulsion polymerization is a well-known technique to incorporate hydrophobic monomers or materials into polymer particles and has also been used to incorporate FMAs [11][12][13]35].…”

Preparation and Properties of Core-shell Structure Fluorinemodified Acrylic Anticorrosion Coatings

“…The morphology of the latex particle was shown in Figure 2. It could be seen that the fluorinated polyacrylate particle exhibited a typical core-shell structure, which was evident from the significant contrast between core (light regions) and shell (dark regions) because of their different electron penetrabilities [20,21]. The size of latex particle was approximately 200 nm, while the shell thickness was approximately 10 nm.…”