Halophilic polysulfabetaines – synthesis and study of gelation and thermoresponsive behavior

Vasantha, Vivek Arjunan; Jana, Satyasankar; Parthiban, Anbanandam; Vancso, G. Julius

doi:10.1039/c4ra00928b

Cited by 24 publications

(41 citation statements)

References 39 publications

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“…12,13 Moreover, altering the anion, cation, or the anion-cation separation distance has a profound effect on the temperature and salt responsiveness of polymer zwitterions. 4,6,14,15 A literature survey reveals that most polymer zwitterions contain nitrogen-based cations derived from ammonium, 5,10,16,17 imidazolium, 15,18 benzimidazolium, 15 and guanidium. 19 Though sulfonium cations are susceptible to nucleophilic dealkylation, [20][21][22][23] polysulfonium salts are long known 22,24 with recent reports of their use in controlled polymerization.…”

mentioning

confidence: 99%

Reactive polymer zwitterions: Sulfonium sulfonates

Chalarca

Emrick

2016

J. Polym. Sci. Part A: Polym. Chem.

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Sulfonium sulfonate, or sulfothetin, zwitterionic monomers were synthesized by ring-opening of 1,3-propanesultone with dialkyl sulfides containing styrenic or methacrylic moieties. Reversible addition-fragmentation chain-transfer polymerization of these monomers was achieved in water or trifluoroethanol, and the resulting polymers exhibited higher upper critical solution temperatures than the analogous sulfobetaine polymers. Unlike typical polymer zwitterions, these polymeric sulfothetins possess an inherent reactivity that proved tunable based on their chemical structures. This reactivity makes them amenable to post-polymerization modification by nucleophilic dealkylation to rapidly access novel substituted polymers and gels. V C 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 83-92

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mentioning

confidence: 99%

Reactive polymer zwitterions: Sulfonium sulfonates

Chalarca

Emrick

2016

J. Polym. Sci. Part A: Polym. Chem.

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“…However, upon increasing the SB content in PS/PSB 3 and PS/PSB 4, the mobility lowered thereby, showing that the electrostatic repulsion is lower than that of PS/PSB 1 and 2. Evidently, the NSP of PS/PSB can be stabilized in electrolytes such as brine, thereby showing halophilic (salt-loving) character 37,38,44 of sulfobetaine based surface (Fig. 3b).…”

Section: Colloidal Stability Of Non-spherical Ps/psb Particlesmentioning

confidence: 99%

“…Polysulfobetaines (PSB) exhibit phase separation because of the strong interaction between polymer chains in aqueous medium. [37][38][39] The strong electrostatic and hydrophobic interactions prevailing in SB comonomer could be utilized to induce phase separation during emulsion polymerization, as illustrated in Fig. 2a.…”

Section: Self-assembly Induced Phase Separation -Inuence Of Sulfobetmentioning

confidence: 99%

Highly monodisperse zwitterion functionalized non-spherical polymer particles with tunable iridescence

et al. 2019

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A facile and simple synthetic route towards functionalized non-spherical polymer particles (NSP) with tunable morphologies and iridescence is presented. Monodisperse particles with unique zwitterionic functionality were synthesized via emulsifier-free emulsion polymerization in a single step process. The sulfobetaine comonomer was utilized to induce phase separation in the course of polymerization to achieve anisotropic NSP with controlled morphologies such as quasi-spherical with protruding structures like bulge, eye-ball, and snowman-like nanostructures. Both SEM and TEM analyses revealed anisotropic particles, and phase-separated protrusion morphology with a small increase in aspect ratio. By taking advantage of the monodisperse, colloidally stable NSPs, template free photonic crystal arrays were fabricated through a bottom-up approach. The particles readily self-assemble and exhibit a photonic bandgap with vivid structural colors that arise from ordered structures of different morphologies. Additionally, the salt-responsive photonic crystals also possess tunable color-changing characteristics. † Electronic supplementary information (ESI) available: The detailed experiment section with the characterization of PS/PSB particles, DLS, SEM, TEM, XPS, FTIR, and TGA. See

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“…For example, enhanced π‐π and donor‐acceptor interactions influenced tremendously the critical salt concentration (CSC), that is, the minimum concentration of salt required to dissolve these polymers . By introducing additional atoms like oxygen between counterions it was possible to further shift the salt concentration upward along with tremendous changes in nature of particles in dispersions even between adjacent homologues, that is, a difference of just one methylene unit . In this series of modifications we hereby report the introduction of tertiary amide functionality between the counterions of sulfobetaine (Scheme ).…”

Section: Introductionmentioning

confidence: 99%

“… Chemical structure of (i) conventional polysulfobetaines (XO or NH), (ii) modified polysulfobetaine, (iii) polysulfabetaines, and (iv) polysulfobetaine of this work.…”

Section: Introductionmentioning

confidence: 99%

Polysulfobetaine bearing tertiary amide between counterions and its applications

Vasantha

Biying

Parthiban

2017

J of Applied Polymer Sci

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Modified sulfobetaine bearing tertiary amide spacer between the counterions is synthesized and polymerized by reversible addition-fragmentation chain transfer polymerization technique. The tertiary amide spacer influences various characteristics of the zwitterionic polymer. The modified polyzwitterion, PZI, forms coacervates in deionized water. The coacervates are thoroughly characterized by scanning electron microscopy, transmission electron microscopy, and transmittance studies. The ability to form coacervate complexes with functional ingredients has been demonstrated by encapsulating renewable resource actives like ferulic acid. The coacervate complexes have been studied by optical microscopy, transmission electron microscopy, and automated sunscreen sun protection factor analyzer. Synergism is noticed in the coacervate complex. Because of its ability to form self-coacervates, this novel addition to the zwitterionic family is potentially useful for encapsulating many functional ingredients through coacervate complex formation.

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Halophilic polysulfabetaines – synthesis and study of gelation and thermoresponsive behavior

Abstract: Polysulfabetaines (PSBs) derived from zwitterionic sulfates (contrary to commonly used polysulfobetaines which are derived from zwitterionic sulfonates) were synthesized for the first time.

Cited by 24 publications

References 39 publications

Reactive polymer zwitterions: Sulfonium sulfonates

Reactive polymer zwitterions: Sulfonium sulfonates

Highly monodisperse zwitterion functionalized non-spherical polymer particles with tunable iridescence

Polysulfobetaine bearing tertiary amide between counterions and its applications

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