Block, random and palm-tree amphiphilic fluorinated copolymers: controlled synthesis, surface activity and use as dispersion polymerization stabilizers

Alaimo, David; Beigbeder, Alexandre; Dubois, Philippe; Broze, Guy; Jérôme, Christine; Grignard, Bruno

doi:10.1039/c4py00366g

Cited by 23 publications

(34 citation statements)

References 37 publications

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“…Indeed, the fluorinated segments of these copolymers are expected to be CO2-philic while the PEO blocks have Scheme1: Synthetic approach Synthetic approach to obtain different architectures of fluorinated copolymers as CO2-philic stabiliser via reversible addition-fragmentation chain transfer (RAFT) polymerisation. 45 The fluorinated segments of these three copolymers of roughly similar compositions, thus similar HFR (1.2±0.2), are imparting solubility in scCO2 (Table 1). Quite identical cloud points were measured for the random and palm-tree architectures that are of roughly identical compositions, i.e.…”

Section: Stabilisers Of Different Architectures (Random Palm-tree Anmentioning

confidence: 99%

“…a PEO45-b-PFDA37 diblock copolymer, a poly((APEO9)5-co-FDA46) grafted copolymer and a poly(APEO9)5-b-PFDA35 palm tree copolymer, were synthesized by RAFT as described previously. 45 …”

Section: Experimental Part Materialsmentioning

confidence: 99%

“…a PEO-b-PFDA diblock copolymers, a P(APEO-co-FDA) random copolymers and a PFDA-b-PAPEO palm tree diblock copolymers (Scheme 1) that have already demonstrated their efficiency to prepare poly(HEMA) nanoparticles in TFT 45 , were synthesized by RAFT polymerisation to investigate their efficiency as stabilisers for the dispersion polymerisation in scCO2. Indeed, the fluorinated segments of these copolymers are expected to be CO2-philic while the PEO blocks have Scheme1: Synthetic approach Synthetic approach to obtain different architectures of fluorinated copolymers as CO2-philic stabiliser via reversible addition-fragmentation chain transfer (RAFT) polymerisation.…”

Section: Stabilisers Of Different Architectures (Random Palm-tree Anmentioning

confidence: 99%

“…45 It is briefly described below for PEO 2000g/mol, the quantities were adjusted for PEO 1000 and 5000g/mol. Prior to the reaction, 5 g of poly (ethylene oxide) (2000 g/mol) was dried 3 times by azeotrope cycles with dry toluene and stored under nitrogen atmosphere.…”

Section: Synthesis Of Macroraft Agent (Peo-cta)mentioning

confidence: 99%

“…In a previous study 45 , some of us reported on the synthesis of perfluorinated stabilisers, composed of hydrophilic poly(ethylene oxide) (PEO) and fluorophilic fluorinated acrylate (1H,1H,2H,2H-heptadecafluorodecyl acrylate, PFDA) sequences combined in different architectures, i.e. random, diblock and palm-tree copolymers and their use as a stabiliser for dispersion polymerisation of HEMA in α,α,α-Trifluorotoluene (TFT).…”

Section: Introductionmentioning

confidence: 99%

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Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

et al. 2017

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Section: Stabilisers Of Different Architectures (Random Palm-tree Anmentioning

confidence: 99%

“…a PEO45-b-PFDA37 diblock copolymer, a poly((APEO9)5-co-FDA46) grafted copolymer and a poly(APEO9)5-b-PFDA35 palm tree copolymer, were synthesized by RAFT as described previously. 45 …”

Section: Experimental Part Materialsmentioning

confidence: 99%

Section: Stabilisers Of Different Architectures (Random Palm-tree Anmentioning

confidence: 99%

Section: Synthesis Of Macroraft Agent (Peo-cta)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

et al. 2017

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Fabrication of hierarchical porous fluoro‐PolyHIPE materials with ultra‐high specific surface area via hypercrosslinking knitting technique

Lin

Xia

Liu

et al. 2022

J of Applied Polymer Sci

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Fluoro‐PolyHIPEs with porous structure exhibit an excellent weather resistance for adsorption, separation or catalyst support applications in extreme environments, however, the specific surface area still needs to be improved. In this study, a porous fluorinated material is prepared by using high internal phase emulsion template method, and the porous structure of fluoro‐PolyHIPE (F‐PolyHIPE) is subsequently excavated and modified by the hypercrosslinking “knitting” method. The “knitting” of micropores in the pore walls of the fluoropolymer is achieved through the Friedel‐Crafts alkylation reaction by using dimethoxymethane (FDA) as the external crosslinker. It transforms the macroporous fluoropolymer prepared based on HIPE emulsion template method into hierarchical porous fluoro‐PolyHIPE (HCPF‐PolyHIPE) with a high specific surface area. The specific surface area of the porous fluorinated material demonstrates an increment from 15.6 m2 g−1 to 353.2 m2 g−1 after hypercrosslinking. Owing to the introduction of the micropores and mesopores as well as the enrichment of the fluorine atoms in the polymer network, HCPF‐PolyHIPE can be successfully applied for CO2 adsorption, thus, representing a major achievement of the study. Moreover, HCPF‐PolyHIPE exhibits excellent thermal stability as well as acid and alkali resistance, thus, confirming potential application prospects in the fields of oil‐water separation and gas adsorption.

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Synthesis and in situ functionalization of microfiltration membranes via high internal phase emulsion templating

Malakian

Zhou

Zowada

et al. 2019

Polymer International

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The continuous phase of high internal phase emulsions (HIPEs) can be polymerized to produce highly porous materials, known as polyHIPEs. The aim of this work was to synthesize polyHIPE microfiltration membranes having a hydrophobic bulk and a hydrophilic surface to enhance their performance. Therefore, in situ functionalization was performed through interfacial copolymerization of a hydrophobic monomer (butyl acrylate) in the continuous phase with a hydrophilic monomer (sodium acrylate) in the disperse phase. The functionalization of polyHIPEs was studied by using conductometric titration and Fourier transform IR spectroscopy. We show that the surface charge density of poly(butyl acrylate)-based polyHIPEs can be controlled by varying the concentration of sodium acrylate in the disperse phase. PolyHIPE microfiltration membranes have higher intrinsic permeability (around 1.31 × 10 −8 m 2 ) in comparison to conventional microfiltration membranes. The interfacial copolymerization of sodium acrylate increases the permeability of microfiltration membranes. In addition, the rejection of polyHIPE microfiltration membranes was studied for the separation of microalgae. Characterization techniques Scanning electron microscopyThe morphology of the polyHIPEs was studied via a scanning electron microscope (S-3400N Type II, Hitachi High-Technologies Corp.). The samples were fractured in liquid nitrogen and sputter Polym Int 2019; 68: 1378-1386

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Block, random and palm-tree amphiphilic fluorinated copolymers: controlled synthesis, surface activity and use as dispersion polymerization stabilizers

Abstract: The architecture of novel fluorinated copolymers drastically influences their stabilizing properties and their ability to template particle formation.

Cited by 23 publications

References 37 publications

Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide

Fabrication of hierarchical porous fluoro‐PolyHIPE materials with ultra‐high specific surface area via hypercrosslinking knitting technique

Synthesis and in situ functionalization of microfiltration membranes via high internal phase emulsion templating

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