Results 41 to 50 of about 4,819 (221)

Controlled drug delivery through tailor-made blend polymeric membranes [PDF]

, 2005
In this work, we prepare tailor-made membranes by blending sulfonated poly(ether ether ketone) (S-PEEK) and poly(ether sulfone) (PES) polymers, at various ratios.
Balster, J.H., Koops, G.H., Rolevink, Hendrikus H.M., Stamatialis, Dimitrios   +3 more
core   +3 more sources

Anchoring Water Soluble Phosphotungstic Acid by Hybrid Fillers to Construct Three-Dimensional Proton Transport Networks

Membranes, 2021
Phosphotungstic acid (HPW)-filled composite proton exchange membranes possess high proton conductivity under low relative humidity (RH). However, the leaching of HPW limits their wide application.
Shaojian He, Zhongrui Lu, Wenxu Dai, Kangning Yang, Yang Xue, Xiaoyang Jia, Jun Lin   +6 more
doaj   +1 more source

Composite Membranes of Sulfonated Poly(ether ether ketone) with Active Carbon: Composite Preparation and Investigation of their Properties for Potential Application for CO2 Electrochemical Reduction

Medžiagotyra, 2020
In this study, synthesis of sulfonated poly(ether ether ketone) (SPEEK) was performed using sulfonation method with concentrated sulfuric acid. Polymer with three degrees of sulfonation was obtained: 0.87; 0.82 and 0.74.
Deniss FEDORENKO, Guntars VAIVARS
doaj   +1 more source

Electrochemical and structural characterization of sulfonated polysulfone [PDF]

, 2015
We describe the synthesis, as well as the electrochemical and structural characterization, of sulfonated polysulfone intended for use in PEM fuel cells. Starting from a commercial polysulfone, we assessed the performance of these prepared ionomers using ...
Levenfeld Laredo, Belén, Martos Gómez, Ana María, Sanchez, J-Y., Várez Álvarez, Alejandro   +3 more
core   +2 more sources

Sulfonation degree effect on ion-conducting SPEEK-titanium oxide membranes properties

Polímeros, 2017
Polymeric membranes were developed using a SPEEK (sulfonated poly(ether ether ketone)) polymer matrix, containing titanium oxide (TiO2) (incorporated by sol-gel method). SPEEK with different sulfonation degrees (SD): 63% and 50% were used.
Jacqueline Costa Marrero, Ailton de Souza Gomes, Wang Shu Hui, José Carlos Dutra Filho, Vivianna Silva de Oliveira   +4 more
doaj   +1 more source

Sustainable fabrication of solvent-free cation exchange membrane via tuning sulfonation time of PEEK

Desalination and Water Treatment
Researchers have been looking at novel strategies to lessen the environmental effect of various industrial processes in recent years due to the growing concern over environmental sustainability on a worldwide scale. The creation of eco-friendly materials
Muhammad Farman, Farhat Yasmeen, Muhammad Aamir Shehzad, Hafiz Muhammad Raoof Amin, Muhammad Farhan   +4 more
doaj   +1 more source

Improvement of COD removal and electricity generation in a MFC through embedding sulfonated reduced graphene oxide in a SPEEK proton exchange membrane [PDF]

Journal of Applied Research in Water and Wastewater
Graphene oxide has attracted many interests in the recent decade due to its unique mechanical and chemical properties. This study focuses on the modification of graphene oxide and preparation proton exchange membrane (PEM) by sulfonated poly ether ether ...
Nasim Saniei, Nahid Ghasemi, Ali Akbar Zinatizadeh, Sirus Zinadini, Majid Ramezani   +4 more
doaj   +1 more source

Engineering Strategies for Stable and Long‐Life Alkaline Zinc‐Based Flow Batteries

Advanced Functional Materials, EarlyView.
Alkaline zinc‐based flow batteries face persistent challenges from unstable zinc deposition, including dendrite growth, passivation, corrosion, and hydrogen evolution, which severely limit cycling stability. Current research addresses these issues through coordinated electrode structuring, electrolyte regulation, and membrane design to control zinc ...
Yuran Bai, Xiaoyu Huo, Xin Long, Enkang Fu, Xusong Gong, Lei Wei, Liang An   +6 more
wiley   +1 more source

Smart Catheters for Diagnosis, Monitoring, and Therapy

Advanced Healthcare Materials, EarlyView.
This study presents a comprehensive review of smart catheters, an emerging class of medical devices that integrate embedded sensors, robotics, and communication systems, offering increased functionality and complexity to enable real‐time health monitoring, diagnostics, and treatment. Abstract This review explores smart catheters as an emerging class of
Azra Yaprak Tarman, Samiha Ahmed, Majed Othman Althumayri, Megan Guy, Darlenne Chavez Lugo, Frances S. Ligler, George T. Ligler, Rahmi Oklu, Hiroshi Kawahira, Michael J. McShane, Jun Kameoka, Jonathan Bova, Hatice Ceylan Koydemir   +12 more
wiley   +1 more source

Sulfonated sporopollenin as an efficient and recyclable heterogeneous catalyst for dehydration of D-xylose and xylan into furfural [PDF]

, 2016
The natural acidity of sporopollenin, the biopolymer coating the outer walls of pollen grains, was enhanced by the sulfonation of its surface. Modified sporopollenin displaying sulfonic acid groups has been prepared, characterized by elemental analysis ...
Boa, Andrew N., Ceballos, Claire, Delbecq, Frederic, Diego Taboada, Alberto, Huang, Youkui, Len, Christophe, Len, Thomas, Mackenzie, Grahame, Wang, Yantao   +8 more
core   +2 more sources