Stability behavior of polystyrene latexes covered with zwitterionic sulfobetaine-type emulsifiers

Graillat, C.; Dumont, B.; Depraetere, P.; Vintenon, V.; Pichot, C.

doi:10.1021/la00053a010

Cited by 20 publications

(14 citation statements)

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“…59 We believe that this is the first elucidation of the anionic behavior of sulfobetaine zwitterions with an analysis of ionic equilibria in zwitterionic systems. The negative f potentials of the sulfobetaine BC were in agreement with the observations of Graillat et al 60 that electrophoretic mobilities of PS latexes coated with (dodecyldimethylammonio)propanesulfonate sulfobetaine surfactant are negative at pH's between 2 and 12. The nonexistence of an isoelectric point in the electrokinetic measurements of Graillat et al 60 could be rationalized with the explanation proposed herein.…”

Section: F Potential and Surface Charge Of The Ionic Bcssupporting

confidence: 91%

Carboxybetaine, sulfobetaine, and cationic block copolymer coatings: A comparison of the surface properties and antibiofouling behavior

Jasiński

Krishnan

2011

J of Applied Polymer Sci

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Two different zwitterionic block copolymers (BCs) and a cationic BC were synthesized from the same BC precursor, which consisted of a polystyrene (PS) block and a poly[N-(3-dimethylamino-1-propyl)acrylamide] block. The zwitterionic BCs contained the dimethylammonioacetate (carboxybetaine) and dimethylammoniopropyl sulfonate (sulfobetaine) groups. Thin films cast from these polymers were investigated for surface wettability, surface charge, and protein adsorption. Surface-energy parameters calculated with advancing contact angle (y a ) and receding contact angle (y r ) of different probe liquids showed that it was y r and not y a that was representative of the polar/ionic groups in the near-surface regions of the coatings. Electrophoretic mobility was used to characterize the influence of pH on the net surface charge. In aqueous dispersions, the carboxybetaine polymer showed an ampholyte behavior with an isoelectric point of 6, whereas the sulfobetaine polymer was found to be anionic at all pH values between 2 and 10. Protein adsorption on the carboxybetaine BC was relatively independent of the net charges on the protein or the polymer, but the negatively charged sulfobetaine polymer showed a higher adsorption of positively charged protein molecules. Regardless of the net protein charge, both zwitterionic coatings adsorbed less protein compared to the PS and poly(2,3,4,5,6-pentafluorostyrene) controls. The sulfobetaine and cationic BCs adsorbed higher amounts of oppositely charged protein molecules than like-charged protein molecules. However, the adsorption of oppositely charged protein was much higher on the cationic surface than on the sulfobetaine surface. The zwitterionic BCs, particularly the carboxybetaine polymer, from this article are expected to function as stable, low-fouling surface modifiers in different biological environments.

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Section: F Potential and Surface Charge Of The Ionic Bcssupporting

confidence: 91%

Carboxybetaine, sulfobetaine, and cationic block copolymer coatings: A comparison of the surface properties and antibiofouling behavior

Jasiński

Krishnan

2011

J of Applied Polymer Sci

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“…In batch, LIMA initially dissolved in the aqueous phase or located in micelles seems to play a major role during the nucleation step. The observation that narrowly distributed particles are finally produced confirms that LIMA exhibits a strong adsorption energy, which avoids desorption and uncontrolled renucleation (as it was noticed with anionic emulsifiers such as SDS, for instance [17]). This also suggests that LIMA takes a conformation when adsorbed at the polymer-water interface which favors polymerization with styrene.…”

Section: Batch Polymerizationsupporting

confidence: 63%

“…A strong decrease of the particle size is displayed, even at a low LIMA concentration (0.2 times the CMC in LB4 experiment), which is definite confirmation that LIMA indeed acts as an efficient surface-active agent in such heterogeneous polymerization. However, the observation that unstable and polydisperse latexes are produced at concentrations higher than CMC suggests that the hydrophilic part of this surfactant imparts poor stability to the particle and that SO; surface charges originated from the initiator are more or less screened; this can be corroborated in considering L B l l experiment in which a small amount of an effective stabilizer (a zwitterionic surfactant [17]) was added as soon as partial flocculation occurred during the polymerization; this caused the final latex particle size to be narrow and small.…”

Section: Batch Polymerizationmentioning

confidence: 94%

Surface functionalization of polystyrene latex particles with a liposaccharide monomer

Revilla

Elaı̈ssari

Pichot

et al. 1995

Polymers for Advanced Techs

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Emulsifier-free latexes with immobilized carbohydrate residues have been prepared by batch or seed (co)polymerization of styrene in the presence of 11-(N-p-vinylbenzy1)arnido undecanoyl maltobionamide (LIMA). The critical micelle concentration and the molecular surface area of LIMA were determined by surface tension and fluorescence measurements. Batch polymerization of LlMA with styrene was first performed using potassium persulfate, proving the efficiency of LlMA as emulsifier. Seed copolymerization was then investigated using polystyrene seed particles with varying experimental conditions (especially the LlMA surface coverage). Material balance of LIMA between aqueous phase and particles was obtained by separating both phases by ultracentrifugation and it was found that the surfaceactive monomer is preferentially on or in the particle (nearly 100% in batch and at most 70% in seed copolymerization). The presence of the carbohydrate residues at the particle surface was directly evidenced by 'H-nuclear magnetic resonance, electron spectroscopy for chemical analysis and electrophoretic mobility.

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“…In addition, different surfactants based on zwitterionic alkylammonium species form micelles which are reported to solubilise a probe aromatic molecule in the micelle core: hydrophobic alkyl chains and ammonium head groups are located close to the core of the micelles, while the anionic groups are located in the outermost part [29], forming a negative cloud around the micelles. Moreover, radical polymerisation process in stabilised emulsion constitutes a well-established method for the production of polymeric particles, surfactant molecules constituting the stabiliser component [30][31][32][33].…”

Section: Polymerisationmentioning

confidence: 99%

Development and characterisation of a novel composite electrode material consisting of poly(3,4-ethylenedioxythiophene) including Au nanoparticles

Zanardi

Terzi

Pigani

et al. 2008

Electrochimica Acta

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Stability behavior of polystyrene latexes covered with zwitterionic sulfobetaine-type emulsifiers

Cited by 20 publications

References 0 publications

Carboxybetaine, sulfobetaine, and cationic block copolymer coatings: A comparison of the surface properties and antibiofouling behavior

Carboxybetaine, sulfobetaine, and cationic block copolymer coatings: A comparison of the surface properties and antibiofouling behavior

Surface functionalization of polystyrene latex particles with a liposaccharide monomer

Development and characterisation of a novel composite electrode material consisting of poly(3,4-ethylenedioxythiophene) including Au nanoparticles

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