Synthesis and Surface Property of Aqueous Fluorine-Containing Polyurethane

Lim, Hyejin; Lee, Yongtaek; Park, In Jun; Lee, Soo-Bok

doi:10.1006/jcis.2001.7750

Cited by 44 publications

(20 citation statements)

References 14 publications

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“…Therefore, during the UV-curing process, the fluorine chain attached to the hard segment could not migrate to the surface at room temperature. Moreover, Kim found that the contact angle of the waterborne fluorinated polyurethane film could increase when the film annealed at high temperature [6], which was also supported by our experiments, the contact angle of UV-cured FPUA films increased while the films were annealed at 120°C for 12 h. Apparently, as shown in Fig. 6, the contact angle increased sharply with the increment of fluorine content, and the surface of the film become hydrophobic when the fluorine content was above 12.3 wt.%, which further proved that the segment which had strong hydrophobic perfluoroalkyl side chains migrated toward the surface through annealing and rendered the surface more hydrophobic [8].…”

Section: Evaluation Of Contact Anglesmentioning

confidence: 98%

“…As for aqueous polyurethane, ionic and/or nonionic hydrophilic segments should be incorporated into polyurethane molecular structure such as carboxyl or poly(ethylene glycol) (PEG) groups [4,5]. The hydrophilic segments act as internal emulsifier, while polyurethane forms dispersion in water without strong external shear force or additional surfactant [6]. However, hydrophilic segments of aqueous polyurethane adversely affect water and soil repellency due to the relatively high surface free energy [7].…”

Section: Introductionmentioning

confidence: 98%

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Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Liu

Pan

et al. 2012

J Polym Res

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The dispersion of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains (FPUA) terminated with pentaerythritol triacrylate (PETA) was synthesized by incorporating fluorine groups into the side chains of the polyurethane macromolecular from condensation polymerization by using perfluorooctanoate glycerate (OF-diols) as chain extender, while the polyurethane macromolecular was synthesized from isophoronediisocyanate (IPDI), dimethylol propionic acid (DMPA), and poly (propylene glycol) (PPG) etc. The chain extender was prepared from 2,2-dimethyl-1,3-dioxolane-4-methyl perfluorooctanoate (OF-diols-pg) by acid hydrolysis with trifluoroacetic acid. The structure of FPUA was characterized by FTIR, NMR, elemental analysis, UV-vis and Mass spectra, and the properties of the synthesized FPUA emulsion were also discussed. The effect of fluorine content on the UV-curing dynamics was studied and the UV-curing speed decreased with increment in fluorine content. Contact angle measurements shown that the hydrophobic property of the surface greatly increased by incorporation of fluorine into the polyurethane chain. In addition, scanning electron spectroscopy (SEM) analysis was applied to characterize the morphology of the fracture surface of the UV-cured FPUA which became phase-mixed after annealing.

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Section: Evaluation Of Contact Anglesmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Liu

Pan

et al. 2012

J Polym Res

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“…But the studies about the approach are rarely reported, especially the incorporation of fluorinated acrylate in polyurethaneacrylate. In a previous paper, authors 20 synthesized a good hydrophobic polyurethane-acrylate coating film with polyurethane prepolymer and a fluorinated macromonomer that contains dihydroxyl groups by the introduction of 1-thioglycol as a chain-transfer agent and long-chain perfluoroalkyl moieties, and the surface free energy was about 20.0 dyn/cm. As yet, reports about cationic PUFA prepared by the copolymerization of vinyl monomers in crosslinked polyurethane were scarcely seen.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrophilic monomer on the surface properties of cationic polyurethane‐fluorinated acrylate hybrid dispersions

Gang-hui

Shen

et al. 2005

J of Applied Polymer Sci

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Cationic polyurethane-fluorinated acrylate hybrid dispersions (PUFA) were prepared by the copolymerization of styrene, butyl acrylate, and 2,2,3,4,4,4-hexafluorobutyl methacrylate in the medium of crosslinked polyurethane via phase inversion polymerization. The said polyurethane was synthesized in acetone from 2,4-tolyene diisocyanate, N-methyldiethanolamine, trimethylolpropane, and soft polyester diol block. The influences of hydrophilic monomer on the surface properties, immersion behaviors, particle size and, zeta potential of the dispersions were investigated. The results show that the addition of hydrophilic monomer can be advantaged to the stability of dispersions and yet will increase the surface free energy by more than 19.9%. The PUFA coating films cured at ambient conditions have the lower surface free energy (less than 0.02033 J/m 2 ). At the same time, there is an obvious mobility of fluorinated groups in fluorinated polymer films.

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“…[27][28][29] They show great surface activity and have created great interest for nearly two decades. [30][31][32][33][34][35] Nonionic polyurethane surfactants show much lower critical micelle concentrations (CMC) than ionic ones and good performance in solubilization of hydrophobes.…”

Section: Introductionmentioning

confidence: 99%

Monitoring Micelle Formation of Nonionic Polyurethane in Water by Fluorescence Spectrophotometry

Zheng¹,

Lu²

2014

Journal of Macromolecular Science, Part B

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A series of nonionic polyurethanes were dissolved in water and their miceller selfassembly behaviors were characterized by aid of a fluorescence spectrophotometer. Fluorescence and resonance light scattering techniques were carried out for characterizing the micelles, and information such as aggregation number, critical micelle concentration, micropolarity, and micelle volume change was obtained. The micropolarity decreased as the aggregation number increased. The nonionic polyurethane micelle volume with two long ethoxyl chains per polyurethane molecule was smaller than the one with short chains, even with the same aggregation number, and was less polar. The micropolarity depended on both the aggregation number and the volume of a single micelle.

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Synthesis and Surface Property of Aqueous Fluorine-Containing Polyurethane

Cited by 44 publications

References 14 publications

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Synthesis and characterization of UV-curable waterborne polyurethane acrylate possessing perfluorooctanoate side-chains

Effect of hydrophilic monomer on the surface properties of cationic polyurethane‐fluorinated acrylate hybrid dispersions

Monitoring Micelle Formation of Nonionic Polyurethane in Water by Fluorescence Spectrophotometry

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