Publications associées à Acide acrylique

Edible Soft Actuators based on Konjac Glucomannan for Underwater Operation

Dario Floreano, Bokeon Kwak, Markéta Pankhurst, Ryo Kanno, Jun Shintake

Soft robots are being increasingly developed and deployed for underwater applications such as exploration, monitoring, and rescue owing to their innate compliance, mechanical and chemical stability, and waterproof properties. However, they are still predom ...

2024

Examination of commercial ceramic coatings for the electrical insulation of Bi-2212 wire

Davide Uglietti, Andrea Testino, Robert Sobota

In the last twenty years, a number of studies have been dedicated to the development of thin ceramic coating for the electrical insulation of Ag-sheathed Bi-2212 wires. Instead of preparing a coating by mixing different compounds in house, this technical n ...

2023

Hydrogen Peroxide Formation during Ozonation of Olefins and Phenol: Mechanistic Insights from Oxygen Isotope Signatures

Urs von Gunten, Joanna Maria Houska

Mitigation of undesired byproducts from ozonation of dissolved organic matter (DOM) such as aldehydes and ketones is currently hampered by limited knowledge of their precursors and formation pathways. Here, the stable oxygen isotope composition of H2O2 for ...

AMER CHEMICAL SOC2023

Simultaneous Generation of Methyl Esters and CO in Lignin Transformation

Paul Joseph Dyson, Mingyang Liu

Lignin is an abundant renewable carbon source. Due to its complex structure, utilization of lignin is very challenging. Herein, we describe an efficient strategy for the simultaneous utilization of lignin, in which the methoxy groups in lignin react with c ...

Wiley-VCH Verlag GmbH2022

Reinforcing hydrogels with in situ formed amorphous CaCO3

Esther Amstad, Matteo Hirsch, Ran Zhao, Tianyu Yuan, Huachuan Du, Michael David Kessler

Hydrogels are often employed for tissue engineering and moistening applications. However, they are rarely used for load-bearing purposes because of their limited stiffness and the stiffness-toughness compromise inherent to them. By contrast, nature uses hy ...

ROYAL SOC CHEMISTRY2022

Preparation of Highly Porous Metal-Organic Framework Beads for Metal Extraction from Liquid Streams

Wendy Lee Queen, Emad Oveisi, Daniel Teav Sun, Shuliang Yang, Li Peng, Olga Trukhina, Olga Syzgantseva, Ilia Kochetygov, Anita Justin, Hassan Abedini, Guanchu Lu

Metal-organic frameworks (MOFs) offer great promise in a variety of gas- and liquid-phase separations. However, the excellent performance on the lab scale hardly translates into pilot- or industrial-scale applications due to the microcrystalline nature of ...

AMER CHEMICAL SOC2020

1,3,2‐Diazaphospholenes Catalyze the Conjugate Reduction of Substituted Acrylic Acids

Nicolai Cramer, John Henry Reed

The potent nucleophilicity and remarkably low basicity of 1,3,2- diazaphospholenes (DAPs) is exploited in a catalytic, metal-free 1,4-reduction of free ,-unsaturated carboxylic acids. Notably, the reduction occurs without a prior deprotonation of the car ...

Wiley-VCH Verlag2020

Shape Engineering of Metal-Organic Frameworks via MOF@Polymer Composite Fabrication

Bardiya Valizadeh

Metal-organic frameworks (MOFs) are a fascinating class of porous materials that have become the subject of research owing to their unique characteristics such as high surface areas, low densities, and structural tunability. Recently, the research has been ...

EPFL2020

New composites for extraction of metal or contaminating chemical species

Wendy Lee Queen, Daniel Teav Sun

he present invention relates to a composite for extracting one or more metal or contaminating chemical species from an aerial or aqueous medium by selective binding, said composite comprising at least one porous template functionalized by at least one poly ...

2019

Deoxygenative trifluoromethylthiolation of carboxylic acids

Xile Hu, Runze Mao, Srikrishna Bera, Alexis Baptiste Cheseaux

Here we describe a deoxygenative trifluoromethylthiolation method that yields trifluoromethyl thioesters from readily available carboxylic acids. The method is built upon an "umpolung" strategy where triphenylphosphine is used to first activate an electrop ...

2019

Equilibrium and Out-of-Equilibrium Adherence of Hydrogels against Polymer Brushes

Jennifer Mary Adrienne Alice Macron, Costantino Creton

At low pH, underwater adherence between poly(N,N-dimethylacrylamide) hydrogels and poly(acrylic acid) brushes is due to the formation of multiple hydrogen bonds. The effect of the key parameters controlling the formation of these interactions (contact time ...

American Chemical Society2018

Copper-catalyzed methylative difunctionalization of alkenes

Qian Wang, Xu Bao, Jieping Zhu, Minh Tu Ha, Takayuki Yokoe

Trifluoromethylative difunctionalization and hydrofunctionalization of unactivated alkenes have been developed into powerful synthetic methodologies. On the other hand, methylative difunctionalization of olefins remains an unexplored research field. We rep ...

Nature Research2018

Amorphous CaCO3: Influence of the Formation Time on Its Degree of Hydration and Stability

Francesco Stellacci, Huachuan Du, Esther Amstad, Camelia Borca, Mathias Steinacher, Anna Murello

Calcium carbonate (CaCO3) is one of the most abundant biominerals that is prevalent in rocks and often used as a structural material in marine animals. Many of these natural CaCO3-based materials display excellent mechanical properties that are difficult t ...

2018

Cross-Coupling of Alkyl Redox-Active Esters with Benzophenone Imines: Tandem Photoredox and Copper Catalysis

Xile Hu, Runze Mao, Jonathan Balon

Alkyl amines are an important class of organic compounds in medicinal and materials chemistry. Until now very have been very few methods for the synthesis of alkyl amines by metal‐catalyzed cross‐coupling of alkyl electrophiles with nitrogen nucleophiles. ...

Wiley-VCH Verlag GmbH2018

Decarboxylative C(sp3 )−O Cross-Coupling

Xile Hu, Runze Mao, Jonathan Balon

Alkyl aryl ethers are an important class of compounds in medicinal and agricultural chemistry. Catalytic C(sp3)−O cross‐coupling of alkyl electrophiles with phenols is an unexplored disconnection strategy to the synthesis of alkyl aryl ethers, with the pot ...

Wiley-VCH Verlag GmbH2018

Ductility and strain rate-dependency of adhesively-bonded timber joints

Myrsini Angelidi

One of the most important characteristics of load-bearing structures is ductility, i.e. the ability of a material or a structure to sustain inelastic deformation prior to failure, without loss of resistance. The topic of this PhD Thesis was to develop duct ...

EPFL2017

Ultrafast All-Polymer Electrically Tunable Silicone Lenses

Herbert Shea, Samuel Rosset, Luc Maffli, Michele Ghilardi

Dielectric elastomer actuators (DEA) are smart lightweight flexible materials integrating actuation, sensing, and structural functions. The field of DEAs has been progressing rapidly, with actuation strains of over 300% reported, and many application conce ...

Wiley-Blackwell2015

Hydrothermally-treated Na-X as efficient adsorbents for butadiene removal

Lioubov Kiwi, Jeremy Luterbacher, Florent Emmanuel Héroguel, Guillaume Bastien Baur, Jonathan Spring

An efficient adsorbent for butadiene was synthesized via soft hydrothermal treatment (2 h in boiling water followed by 1 h calcination at 573 K) of industrial Na-X. The adsorption capacity of the zeolite was studied in the low concentration range (20–300 p ...

2015

Soft Approaches to CO2 Activation

Paul Joseph Dyson, Felix Daniel Bobbink, Aswin Gopakumar, Shoubhik Das

The utilization of CO2 as a C1 synthon is becoming increasingly important as a feedstock derived from carbon capture and storage technologies. Herein, we describe some of our recent research on carbon dioxide valorization, notably, using organocatalysts to ...

Swiss Chemical Soc2015

Copper-Mediated/Catalyzed Oxyalkylation of Alkenes with Alkylnitriles

Qian Wang, Jieping Zhu, Ala Bunescu

A copper-promoted oxyalkylation of alkenes with alkylnitriles has been developed. The protocol provides rapid access to phthalides (g-lactones) or isochromanones (d-lactones) via the formation of a C(sp3)C(sp3) and a C(sp3)O bond with the generation of up ...

Wiley-Blackwell2014