Christophe Daniel
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View article: Transitions between Nanoporous crystalline α and β forms of poly(2,6-dimethyl-1,4-phenylene) oxide (PPO)
Transitions between Nanoporous crystalline α and β forms of poly(2,6-dimethyl-1,4-phenylene) oxide (PPO) Open
Nanoporous-crystalline (NC) α and β forms of Poly(2,6-dimethyl-1,4-phenylene) oxide (PPO), exhibit two different large helix conformations, both being suitable for intrahelical low-molecular-mass guest inclusion. α → β and β → α transition…
View article: Extended <i>Q</i>-range small-angle neutron scattering to understand the morphology of proton-exchange membranes: the case of the functionalized syndiotactic-polystyrene model system
Extended <i>Q</i>-range small-angle neutron scattering to understand the morphology of proton-exchange membranes: the case of the functionalized syndiotactic-polystyrene model system Open
Semi-crystalline polymers exhibit microphase separation into crystalline and amorphous domains characterized by multiple structural levels with sizes ranging from ångströms to hundreds of nanometres. The combination of small-angle (SANS) a…
View article: Hydrogen Bonded Dimer of an Alcohol with the Derived Carboxylic Acid Triggering their Sorption by Nanoporous‐crystalline PPO Films
Hydrogen Bonded Dimer of an Alcohol with the Derived Carboxylic Acid Triggering their Sorption by Nanoporous‐crystalline PPO Films Open
Films exhibiting nanoporous‐crystalline (NC) phases of poly(2,6‐dimethyl‐1,4‐phenylene) oxide (PPO), which are highly effective to absorb apolar organic guest molecules, are also able to absorb polar molecules (like alcohols and carboxylic…
View article: Salicylic Acid Release from Syndiotactic Polystyrene Staple Fibers
Salicylic Acid Release from Syndiotactic Polystyrene Staple Fibers Open
Films and fibers of syndiotactic polystyrene (sPS), being amorphous or exhibiting nanoporous crystalline (NC) or dense crystalline phases, were loaded with salicylic acid (SA), a relevant non-volatile antimicrobial molecule. In the first s…
View article: Remediation of perchloroethylene contaminated groundwater using Fe0/ZnS embedded in a highly porous polymer: Experimental results on pilot-scale photoreactor and kinetic modeling analysis for industrial scale-up
Remediation of perchloroethylene contaminated groundwater using Fe0/ZnS embedded in a highly porous polymer: Experimental results on pilot-scale photoreactor and kinetic modeling analysis for industrial scale-up Open
Perchloroethylene (PCE) is a pollutant toxic to aquatic life and suspected of being a human carcinogen. It is also recalcitrant to degradation. Therefore remediation of PCE-contaminated groundwater is currently still a challenging task. In…
View article: Poly(phenylene oxide) Films with Hydrophilic Sulfonated Amorphous Phase and Physically Cross-Linking Hydrophobic Crystalline Phase
Poly(phenylene oxide) Films with Hydrophilic Sulfonated Amorphous Phase and Physically Cross-Linking Hydrophobic Crystalline Phase Open
Poly(phenylene oxide) (PPO) films with hydrophilic sulfonated amorphous phase and physically cross-linking hydrophobic crystalline phase are obtained by solid-state film sulfonation. Semicrystalline-sulfonated PPO (SPPO) films show hydroth…
View article: Thymol and Carvacrol: Phenolic Monoterpenes Extracted from the Essential Oil of <i>Thymus vulgaris</i> as Natural Antimicrobial Guests of Nanoporous Crystalline Syndiotactic Polystyrene Fibers
Thymol and Carvacrol: Phenolic Monoterpenes Extracted from the Essential Oil of <i>Thymus vulgaris</i> as Natural Antimicrobial Guests of Nanoporous Crystalline Syndiotactic Polystyrene Fibers Open
Thymol and carvacrol, relevant natural antimicrobial molecules, induce co‐crystallization and, in absence of any mechanical stretching, also high degrees of axial orientation on s‐PS amorphous fibers. The release of thymol and carvacrol fr…
View article: Selective Absorption of Aromatic Compounds by Syndiotactic Polystyrene Aerogels
Selective Absorption of Aromatic Compounds by Syndiotactic Polystyrene Aerogels Open
Experimental measurements are combined with mathematical modeling in order to investigate the selective absorption of aromatic molecules (benzene, phenol, and toluene) from aqueous solutions by syndiotactic polystyrene (sPS) monolithic aer…
View article: Efficient radioactive gas detection by porous metal-organic framework scintillating nanocrystals.
Efficient radioactive gas detection by porous metal-organic framework scintillating nanocrystals. Open
Natural radioactive gases and anthropogenic radionuclides such as radon, xenon, hydrogen and krypton isotopes, need to be carefully monitored to be properly managed as pathogenic agents, radioactive diagnostic agents or indicators of nucle…
View article: Transparent and flexible high-surface area nanoporous crystalline PPO films
Transparent and flexible high-surface area nanoporous crystalline PPO films Open
Guest and processing conditions leading to high surface area (SA) nanoporous-crystalline (NC) poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) films are explored.
View article: <i>c</i>‐perpendicular orientation in thin <scp>nanoporous‐crystalline</scp> poly(2,6‐dimethyl‐1,4‐phenylene)oxide films
<i>c</i>‐perpendicular orientation in thin <span>nanoporous‐crystalline</span> poly(2,6‐dimethyl‐1,4‐phenylene)oxide films Open
Nanoporous‐crystalline films of poly(2,6‐dimethyl‐1,4‐phenylene)oxide (PPO), exhibiting c‐perpendicular orientation (c ⊥ ) orientation (i.e., the orientation of the crystalline chain axes being preferentially perpendicular to the film plan…
View article: High Surface Area Nanoporous-Crystalline Polymer Films
High Surface Area Nanoporous-Crystalline Polymer Films Open
Based on a commercially available thermoplastic polymer (poly(2,6-dimethyl-1,4-phenylene) oxide, PPO), nanoporous-crystalline (NC) polymer films with a surface area (SA) higher than 600 m2 g–1 and with exceptionally fast organic pollutant …
View article: Nanoporous–Crystalline Poly(2,6-dimethyl-1,4-phenylene)oxide Aerogels with Selectively Sulfonated Amorphous Phase for Fast VOC Sorption from Water
Nanoporous–Crystalline Poly(2,6-dimethyl-1,4-phenylene)oxide Aerogels with Selectively Sulfonated Amorphous Phase for Fast VOC Sorption from Water Open
This paper describes the preparation and characterization of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) highly porous monolithic aerogels with a hydrophobic nanoporous–crystalline phase and a hydrophilic sulfonated amorphous phase. The su…
View article: Molecular Features Behind Formation of α or β Co-Crystalline and Nanoporous-Crystalline Phases of PPO
Molecular Features Behind Formation of α or β Co-Crystalline and Nanoporous-Crystalline Phases of PPO Open
Guest molecular features determining the formation of α and β phases of poly(2-6-dimethyl-1,4-phenylene) oxide (PPO) are explored by collecting literature data and adding many new film preparations, both by solution casting and by guest so…
View article: Dependence on Film Thickness of Guest-Induced c Perpendicular Orientation in PPO Films
Dependence on Film Thickness of Guest-Induced c Perpendicular Orientation in PPO Films Open
For poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) films exhibiting nanoporous-crystalline (NC) phases, c⊥ orientation (i.e., crystalline polymer chain axes being preferentially perpendicular to the film plane) is obtained by crystallization …
View article: Monomeric and Dimeric Carboxylic Acid in Crystalline Cavities and Channels of Delta and Epsilon Forms of Syndiotactic Polystyrene
Monomeric and Dimeric Carboxylic Acid in Crystalline Cavities and Channels of Delta and Epsilon Forms of Syndiotactic Polystyrene Open
Delta (δ) and epsilon (ε) co-crystalline forms of syndiotactic polystyrene with a carboxylic acid guest were obtained by sorption of liquid hexanoic acid in syndiotactic polystyrene films exhibiting delta and epsilon nanoporous-crystalline…
View article: Planar Orientation and Transparency of Nanoporous-Crystalline Polymer Films
Planar Orientation and Transparency of Nanoporous-Crystalline Polymer Films Open
The dependence of polymer film transparency on different kinds of planar orientations of nanoporous-crystalline (NC) phases of syndiotactic polystyrene (sPS) and poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) is described. The two polymers ex…
View article: Composite Polymeric Films with Photocatalytic Properties
Composite Polymeric Films with Photocatalytic Properties Open
Polymeric films and in particular polypropylene (PP) films could be selected as excellent substrates for photocatalytic applications based on TiO2. However, hydrophobic surface of PP makes very difficult the adhesion of TiO2 particles on i…
View article: c-Perpendicular Orientation of Poly(ʟ-lactide) Films
c-Perpendicular Orientation of Poly(ʟ-lactide) Films Open
Poly(ʟ-lactide) (PLLA) films, even of high thickness, exhibiting co-crystalline and crystalline α phases with their chain axes preferentially perpendicular to the film plane (c⊥ orientation) have been obtained. This c⊥ orientation, unprece…
View article: Nanoporous Crystalline Composite Aerogels with Reduced Graphene Oxide
Nanoporous Crystalline Composite Aerogels with Reduced Graphene Oxide Open
High-porosity monolithic composite aerogels of syndiotactic polystyrene (sPS) and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) containing reduced graphene oxide (r-GO) were prepared and characterized. The composite aerogels obtained by sup…
View article: Axial Orientation of Co-Crystalline Phases of Poly(2,6-Dimethyl-1,4-Phenylene)Oxide Films
Axial Orientation of Co-Crystalline Phases of Poly(2,6-Dimethyl-1,4-Phenylene)Oxide Films Open
Films exhibiting co-crystalline (CC) phases between a polymer host and low-molecular-mass guest molecules are relevant for many applications. As is usual for semi-crystalline polymers, axially oriented films can give relevant information o…
View article: Axially Oriented Nanoporous Crystalline Phases of Poly(2,6-dimethyl-1,4-phenylene)oxide
Axially Oriented Nanoporous Crystalline Phases of Poly(2,6-dimethyl-1,4-phenylene)oxide Open
The aim of this paper is the achievement of films characterized by axially oriented nanoporous-crystalline (NC) and co-crystalline (CC) phases of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO). Axiall...
View article: Polymorphism of Poly(2,6-dimethyl-1,4-phenylene)oxide in Axially Stretched Films
Polymorphism of Poly(2,6-dimethyl-1,4-phenylene)oxide in Axially Stretched Films Open
Axial orientation of poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) films is achieved by stretching in a narrow temperature range (220–230 °C) close to the polymer glass-transition temperature (Tg). Stretching at high draw ratios of PPO films…
View article: Impact of the cold regenerator mesh geometry on low temperature pulse tube cold finger performance
Impact of the cold regenerator mesh geometry on low temperature pulse tube cold finger performance Open
Future astrophysics missions such as SPICA, Athena or LiteBird will need a cooling below 1 K (until 50 mK) to achieve the detectors’ required sensibility. To address such requirements, cooling chains are built coupling several technologies…