Results 71 to 80 of about 7,965 (193)

Simulation‐Based Design and Evaluation of an Alkaline Direct Glycerol Fuel Cell Stack With Integrated Purification

Fuel Cells, Volume 26, Issue 4, August 2026.
ABSTRACT Direct glycerol fuel cells (DGFCs) are a promising technology, but scaling them remains a challenge due to persistent technological and economic limitations. In this context, process simulation and modeling emerge as crucial tools. This study addresses the implementation of a conventional alkaline DGFC stack model in Aspen Plus and proposes a ...
Alessandra Pezzini, Ruy de Sousa Júnior
wiley   +1 more source

Green and Rapid Determination of Phthalates in Mineral Water From Virgin and Recycled PET Bottles

Journal of Mass Spectrometry, Volume 61, Issue 8, August 2026.
ABSTRACT This study investigates the presence and quantification of phthalates released into mineral waters from virgin and recycled polyethylene terephthalate (PET) bottles. A green, solvent‐free analytical method based on solid‐phase microextraction (SPME) coupled with gas chromatography–mass spectrometry (GC/MS) was developed and validated to detect
Claudia Lino, Serena Indelicato, David Bongiorno, Fabio D'Agostino, Giuseppe Avellone   +4 more
wiley   +1 more source

Effect of SBS Copolymer Molecular Structure on the Long‐Term Aging and Resilience of Asphalt Binders: A Multiscale Morphological Study

Macromolecular Materials and Engineering, Volume 311, Issue 8, August 2026.
Vinyl content governs the long‐term ageing resistance of SBS‐modified bitumen. Multiscale AFM, FM, SEM, and FTIR analyses show that low‐vinyl SBS copolymers (L‐SBS, B‐SBS) undergo pronounced bee‐phase growth, stiffening, and network fragmentation after PAV ageing, whereas high‐vinyl variants (HV‐SBS, DB‐SB) retain their morphology and chemistry ...
Sk Sohel Islam, Ayana Ghosh, Bhupendra Singh, Gondaimei Rongmei Naga Ransinchung, Sham S. Ravindranath, Praveenkumar Thaloor Ramesh, Zelalem Mebrate   +6 more
wiley   +1 more source

Extraction of Uranium(VI) by Di-(2-ethylhexyl)-phosphoric acid, Tributyl Phosphate and Trioctyl Phosphine Oxide Gels

CHIMIA, 1979
The gel-liquid extraction of U(VI) has been studied using the equilibrium distribution method. Gels used in this study were prepared by swelling styrene divinylbenzene with di-(2-ethyl-hexyl)-phosphoric acid (HDEHP), tributyl phosphate, trioctyl ...
Kamel Shakir, Shokry G. Beheir
doaj   +1 more source

Efficient Trapping and Degradation of Polyethylene Terephthalate Nanoplastics Using Enzyme‐Functionalized Bowl‐Shaped Janus Particles

Small Structures, Volume 7, Issue 8, August 2026.
A “capture‐and‐degrade” strategy is developed using enzyme‐functionalized bowl‐shaped Janus particles for efficient removal of PET nanoplastics. The hydrophobic concave cavity enables selective trapping of nanoparticles, while immobilized HotPETase‐LCI promotes in situ degradation.
Ke Wei, Qian Ding, Ekram Akram, Chengyang Chu, Yujing Ding, Xin Su, Ruiqi Yan, Qian Sui, Yifei Zhang   +8 more
wiley   +1 more source

Core-shell magnetic particles obtained by seeded suspension polymerization of acrylic monomers

Polímeros
Core-shell magnetic polymer particles were synthesized by seeded suspension polymerization. The core was made of poly(methyl methacrylate-co-divinylbenzene) and a mixture of magnetite, maghemite and goethite (P(MMA-co-DVB)-M).
Jacira Aparecida Castanharo, Ivana Lourenço de Mello Ferreira, Manoel Ribeiro da Silva, Marcos Antonio da Silva Costa   +3 more
doaj   +1 more source

Phosphoric Acid and Steam as Activation Agents for Carbonized Porous Polymer Surfaces

Adsorption Science & Technology, 2006
Carbon sorbents derived from the copolymer of 4,4′-bis(maleimidodiphenyl)methane and divinylbenzene are described. The influence of phosphoric acid treatment and the type of carrier gas used in the carbonization process were studied.
M. Sobiesiak, B. Gawdzik, A.M. Puziy, O.I. Poddubnaya   +3 more
doaj   +1 more source

Polymer‐Derived Ceramics: A Materials Platform for Advanced Energy and Environmental Applications

Journal of the American Ceramic Society, Volume 109, Issue 8, August 2026.
Polymer‐derived ceramics (PDCs) represent a unique class of materials bridging polymer chemistry and ceramic science, perfectly suited for the design of advanced materials for current technological challenges of high societal impact particularly in energy and environmental domains.
Hippolyte Dory, Chrystelle Salameh, Philippe Miele   +2 more
wiley   +1 more source

Harnessing Random Polymers as Chemoselective Catalysts With Structural Adaptability: Epoxidation of Olefinic Quaternary Ammonium Salts via Charge Recognition

Chemistry – A European Journal, Volume 32, Issue 27, 17 July 2026.
The development of chemoselective catalysts that operate across structurally diverse substrates remains a long‐standing challenge. Here, we demonstrate that a random heteropolymer bearing carboxylic acid and urea residues functions as a general epoxidation catalyst for olefinic quaternary ammonium salts.
Yusei Fujii, Kiyosei Takasu, Yusuke Kuroda   +2 more
wiley   +1 more source

Scientific Opinion on the safety evaluation of the substance, (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross‐linked with divinylbenzene or 1,3‐butanediol dimethacrylate for use in food contact materials

EFSA Journal, 2011
This scientific opinion of EFSA deals with the risk assessment of the polymeric additive (butadiene, styrene, methyl methacrylate, butyl acrylate) copolymer cross‐linked with divinylbenzene or 1,3‐butanediol dimethacrylate, REF. No.
EFSA Panel on food contact materials, enzymes, flavourings and processing aids (CEF)
doaj   +1 more source