MacroRAFT agents from renewable resources and their use as polymeric scaffolds in a grafting from approach

Smet, Sanne De; Lingier, Sophie; Prez, Filip Du

doi:10.1039/c3py01288c

Cited by 12 publications

(8 citation statements)

References 41 publications

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“…However, the improvement in this property is not always at a satisfactory level [3][4][5][6]. Research suggested that the brittleness of PLA is due to the low entanglement density (Ve) and the high characteristic ratio (C∞), which is a measure of chain stiffness [7,8]. Furthermore, it has been reported that the entanglement density of polymer chains changes during the physical aging process, which will induce a variation in the mechanical properties, especially the toughness and fracture performance, of polymers.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polylactide Admixed with Carbon Nanotubes or Graphene Nanopowder

et al. 2021

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The aim of this work was to verify the material properties of polylactic acid (PLA) with an addition of carbon nanotubes (CNTs) or graphene nanopowder (GNP). The pure polylactide and admixed polylactide samples were subjected to chemical–physical tests to determine their stiffness and strength parameters. The tensile and impact tests were performed on samples without UV (ultraviolet) treatment and after UV treatment, in a physiological saline solution. The investigations were composed of two stages. The first one was related to the examination of the properties of pure polylactide, denoted as the following: 3001D, 4032D, and 4043D. The second stage was based on an analysis of the properties of PLA 4032D with an admixture of GNP or CNTs, at 0.1 wt.% and 0.5 wt.%. By comparing the strength and the stiffness of pure samples with samples with the considered admixtures, an essential increase was not observed. However, it is stated that the presence of GNP and CNTs in the samples positively influenced the resistance of the materials to the ageing process.

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Section: Introductionmentioning

confidence: 99%

Mechanical Properties of Polylactide Admixed with Carbon Nanotubes or Graphene Nanopowder

et al. 2021

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“…[14,24,[30][31][32][33] Up to now, mostly fossil-based resources were involved in the hydrophobic modification of PAA while there is a global need in reducing the dependence on petrochemical resources. [34][35][36] In the variety of biomass feedstock, terpenes have known a growing interest in recent studies of polymer chemistry. [37][38][39][40][41] The originality of the present work is to prepare amphiphilic copolymers based on tetrahydrogeraniol (THG) terpene and well-defined poly(acrylic acid) in order to stabilize solventfree transparent nanoemulsion of dihydromyrcenol (DHM) in water.…”

Section: Introductionmentioning

confidence: 99%

Rational design of tetrahydrogeraniol-based hydrophobically modified poly(acrylic acid) as emulsifier of terpene-in-water transparent nanoemulsions

Atanase

Larraya²,

Tranchant³

et al. 2017

European Polymer Journal

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Amphiphilic copolymers based on renewable resources were involved as emulsifiers to prepare transparent terpene-in-water nanoemulsions. The amphiphilic copolymers are composed of hydrophobically modified poly(acrylic acid) (HMPAA) grafted with different fractions of hydrophobic bio-based tetrahydrogeraniol (THG) side chains. The well-defined PAA were synthesized by reversible addition fragmentation transfer (RAFT) polymerization in order to tune the number-average molar mass of the initial PAA. The self-assembly in aqueous solution of the HMPAA copolymers was investigated through the measurement of their critical aggregation concentration by viscometry, tensiometry, dynamic light scattering and the determination of their aggregation number by static light scattering. Series of oil-in-water nanoemulsions using dihydromyrcenol (DHM) terpene as dispersed phase and PAA-THG as emulsifier were prepared with different PAA-THG/DHM weight ratios and DHM/water weight ratios. The level of transparency of the emulsions was monitored though the transmittance value measured at 600 nm and the measurements of the hydrodynamic diameter of droplets by dynamic light scattering. This study highlights that the structure of the PAAx-THGy is a key parameter to prepare terpene-inwater nanoemulsions with the required high level of transparency. The optimised structure of the emulsifier consists in a moderate degree of polymerization of PAA backbone (DP n ̅̅̅̅̅ ,PAA  180) 2 along with an intermediate average degree of substitution in hydrophobic THG side chains (13  DS ̅̅̅̅  32).

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“…1,2 Among alternative biofuels, biobutanol (n-butanol), having a higher fuel value, a lower volatility and a lower freezing point compared with ethanol, 3 is expected to play an important role in the next generation of biofuels. biobutanol and bioethanol) from renewable biomass by biotechnological processes.…”

Section: Introductionmentioning

confidence: 99%

“…biobutanol and bioethanol) from renewable biomass by biotechnological processes. 1,2 Among alternative biofuels, biobutanol (n-butanol), having a higher fuel value, a lower volatility and a lower freezing point compared with ethanol, 3 is expected to play an important role in the next generation of biofuels. Biobutanol can be produced through conventional A-B-E (acetone-butanol-ethanol) fermentation using Clostridia bacteria (e.g.…”

Section: Introductionmentioning

confidence: 99%

High performance polydimethylsiloxane pervaporative membranes with hyperbranched polysiloxane as a crosslinker for separation of n-butanol from water

et al. 2015

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Hyperbranched polysiloxane (HPSiO) was successfully synthesized by a three-step process. The result of 29 Si Nuclear Magnetic Resonance (NMR) measurement indicates that the degree of branching (DB) of HPSiO is 0.73. Then, novel polysiloxane membranes, HPSiO-c-PDMS, were prepared by the cross-linking reaction between HPSiO and a,u-dihydroxypolydimethylsiloxane (H-PDMS) with different molecular weights. HPSiO-c-PDMS membranes were first used as membrane materials for recovering n-butanol from an aqueous solution by pervaporation (PV). The HPSiO-c-PDMS membranes demonstrated high n-butanol/water selectivity as well as high permeability. As the molecular weight of H-PDMS increased, the selectivity increased and the n-butanol permeability of HPSiO-c-PDMS-2 (with moderate H-PDMS molecular weight) membrane showed the highest value. The effects of temperature and feed concentration on the PV performances were also investigated. The PV performance, n-butanol permeability and n-butanol/water selectivity of the HPSiO-c-PDMS-2 membrane, reached 4.3 Â 10 5 Barrer and 8.75, respectively, with a feed concentration of 1.0 wt% at 30 C.

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MacroRAFT agents from renewable resources and their use as polymeric scaffolds in a grafting from approach

Cited by 12 publications

References 41 publications

Mechanical Properties of Polylactide Admixed with Carbon Nanotubes or Graphene Nanopowder

Mechanical Properties of Polylactide Admixed with Carbon Nanotubes or Graphene Nanopowder

Rational design of tetrahydrogeraniol-based hydrophobically modified poly(acrylic acid) as emulsifier of terpene-in-water transparent nanoemulsions

High performance polydimethylsiloxane pervaporative membranes with hyperbranched polysiloxane as a crosslinker for separation of n-butanol from water

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