Publications associées à Polyol

Extraction and controlled functionalization of lignin for materials applications

Lignin is a renewable aromatic polymer that due to its abundance and unique chemical structure is a promising candidate to replace aromatic materials that are currently sourced from fossil oil. The same structure of lignin poses however drawbacks for its v ...

EPFL2022

En route to CO2-containing renewable materials: catalytic synthesis of polycarbonates and non-isocyanate polyhydroxyurethanes derived from cyclic carbonates

Paul Joseph Dyson, Felix Daniel Bobbink, Antoine Philippe Van Muyden

Combining CO2-chemistry with biomass conversion allows renewable polymeric materials including polycarbonates and polyhydroxyurethanes (PHUs) to be generated. The demand for robust materials with modular properties that can be prepared on an industrial sca ...

Royal Society of Chemistry2019

Production and characterization of stabilized lignin

Masoud Talebi Amiri

Lignocellulosic biomass is a sustainable source of renewable carbon, and it is the most abundant form of terrestrial biomass. The three main constituents of lignocellulosic biomass are cellulose, hemicellulose, and lignin. The monomers from these biopolyme ...

EPFL2019

Synthesis strategies to extend the variety of alginate-based hybrid hydrogels for cell microencapsulation

Sandrine Gerber, François Rémi Pierre Noverraz, Jutta Christine Wandrey, Luca Szabó, Solène Marcelle Françoise Marie Passemard

The production of hydrogel microspheres (MS) for cell immobilization, maintaining the favorable properties of alginate gels but presenting enhanced performance in terms of in vivo durability and physical properties, is desirable to extend the therapeutic p ...

American Chemical Society2017

Synthesis and Functionalization of Silver Nanoparticles for the Preparation of High Permittivity Nanocomposites

Jose Enrico Quijano Quinsaat

Over the last decade, a growing interest in nanochemistry has emerged due to the interesting features of nanomaterials that vary with size, shape and surface structure. In particular, metal nanoparticles have received much attention due to their properties ...

EPFL2015

Continuous Production of Tailored Silver Nanoparticles by Polyol Synthesis and Reaction Yield Measured by X-ray Absorption Spectroscopy: Toward a Growth Mechanism

Christian Ludwig, Heinrich Hofmann, Paul Bowen, Frank Nüesch, Andrea Testino, Jose Enrico Quijano Quinsaat

Two complementary topics are discussed: (i) the continuous production of silver nanoparticles (AgNPs) and (ii) the measurement of reaction yield by X-ray absorption near-edge spectroscopy (XANES). The continuous polyol synthesis of AgNPs in grams amount an ...

Amer Chemical Soc2014

Functional polypeptide and hybrid materials: Precision synthesis via alpha-amino acid N-carboxyanhydride polymerization and emerging biomedical applications

Harm-Anton Klok

Polypeptides derived from naturally occurring a-amino acids have emerged as a unique and versatile family of bio-inspired biomaterials that can be tailor-made for varying biomedical applications such as controlled drug release, gene delivery, tissue engine ...

Elsevier2014

Extremely robust and conformable capacitive pressure sensors based on flexible polyurethane foams and stretchable metallization

Stéphanie Lacour, Douglas Cameron Watson, Hugues Vandeparre

Microfabricated capacitive sensors prepared with elastomeric foam dielectric films and stretchable metallic electrodes display robustness to extreme conditions including stretching and tissue-like folding and autoclaving. The open cellular structure of the ...

American Institute of Physics2013

High-performance, nano-structured LiMnPO4 synthesized via a polyol method

Michael Graetzel, Nam Hee Kwon, Gianluca Deghenghi

A novel polyol synthesis was adopted to synthesize nano-structured LiMnPO4. This route yields well-crystallized nanoparticles with platelet morphology that are only similar to 30 nm thick oriented in the b direction. The obtained material presented a good ...

Elsevier2009

Time-intensity transformation and internal stress in UV-curable hyperbranched acrylates

Yves Leterrier, Daniel Schmäh, Lars Schmidt

The photocuring of three different highly functional acrylates—Di-pentaerythritol penta/hexaacrylate (DPHA) and two hyperbranched molecules (HBP), one with a stiff polyester and one with a more flexible polyether structure—was investigated by means of phot ...

Springer-Verlag2007

New efficient synthetic routes toward functionalised polyketides : application to the preparation of analogues of bioactive natural compounds

Gérald Coste

RNA plays key roles in essential biological processes, such as protein synthesis, transcriptional regulation, splicing and retroviral replication. The structural diversity of RNA molecules and the lack of known RNA repair mechanisms make these biopolymers ...

EPFL2007

Synthesis and evaluation of 2'-O-substituted oligoribonucleotide analogues with new properties

Luc Reymond

During a previous, exploratory project in our group, it was observed that duplexes formed by oligonucleotides modified with polar 2'-O-substituents were more tolerant towards the addition of 1,2-dimethoxyethane (DME) than RNA and DNA duplexes [1]. Inspired ...

EPFL2006

Low-Profile mechanisms in a PVAc/polyester blend

Véronique Michaud, Xavier Bulliard

The different steps associated with the curing of a PVAc/polyester blend are identified and correlated to the mechanism of shrinkage control in the presence of a low-profile additive (LPA). Poly(vinyl acetate) (PVAc) is used as a LPA and is shown to induce ...

2006

Silyl methallylsulfinates: efficient and powerful agents for the chemoselective silylation of alcohols, polyols, phenols and carboxylic acids

Pierre Vogel, Loay Awad, Cotinica Craita, Xiaogen Huang

Alcohols, phenols and carboxylic acids are silylated with very good yields in the presence of silyl methallylsulfinates under non- basic conditions and with the formation of volatile co-products. ...

Royal Society of Chemistry2005