Results 11 to 20 of about 26,885 (272)
Frontiers in Pharmacology, 2021 Formononetin is one of the main active compounds of traditional Chinese herbal medicine Astragalus membranaceus. However, disposition of formononetin via sulfonation pathway remains undefined.
Fanye Liu +10 more
doaj +1 more source
Preparation and properties of a composite charged membrane [PDF]
, 1982 In order to develop a low pressure desalination membrane with fixed ionic charges, we made use of the normally unwanted crosslinking tendency in preparing the polyelectrolyte poly(styrenesulfonate) by sulfonation of polystyrene.
Boer, R. de +3 more
core +8 more sources
Chemically modified polysulfones for molecular imprinting. Synthesis and complexation with a fluorescent model template [PDF]
, 2013 Polysulfone (PSU) was chemically modified to prepare new molecular imprinted membranes (MIMs). Several amounts of amine and sulfonyl groups were introduced into the PSU chemical structure in order to create interactions with acid or base templates, such ...
Fery-Forgues, Suzanne +5 more
core +6 more sources
International Journal of Electrochemical Science, 2016 The sulfonic acid groups in SPEEK proton exchange membranes are belonging to hydrophilic groups, which are generally affect the performance of the proton conductivity, methanol permeability and anti- swelling properties.
Fengying Yu, Jiajie Hu
doaj +1 more source
Sulfonated electrospun polystyrene as cation exchange membranes for fuel cells
Energy Reports, 2020 Fuel cells are one of important renewable energy sources represent scientific trends of contemporary researches that seek to find better alternatives to solve the negatives of organic fuels and biological damage to humans, environment and atmosphere. The
Noor M. Jalal +3 more
doaj +1 more source
Chemical Engineering Transactions, 2023 Carbon-based catalysts were reported to hold advantages such as being cost-effective, eco-friendly while having good stability and high selectivity in catalytic processes.
Wan Ting Tan +2 more
doaj +1 more source
Defining sulfonation limits of poly(ether-ether-ketone) for energy-efficient dehumidification
Journal of Materials Chemistry A, 2021 Unprecedented water vapor uptake of 320% was demonstrated with SPEEK at an unexpectedly low degree of sulfonation of 19% due to the high S–S distance.
F. Akhtar +5 more
semanticscholar +1 more source
Proton Exchange Membrane Based on Sulfonated Poly (Aromatic Imide-Co-Aliphatic Imide) for Direct Methanol Fuel Cell [PDF]
Materials Research, 2017 A new sulfonated poly(aromatic imide-co-aliphatic imide) (SPI) for the use as a polymer electrolyte membrane was successfully synthesized from 4,4'-diaminodiphenylmethane (DDM), 4,4'-diaminodiphenylmethane-2,2'-disulfonic acid disodium salt (S-DDM ...
Phornpussadee Umsarika +5 more
doaj +1 more source
Zhongguo youzhi, 2022 为了促进豆渣的资源化利用，以豆渣为原料，通过同步炭化磺化法制备豆渣基固体酸催化剂，并将其应用于催化合成环氧大豆油,考察了磺化剂种类、磺化剂用量、磺化温度及磺化时间对豆渣基固体酸结构及催化性能的影响。结果表明：以硫酸为磺化剂，在硫酸与豆渣质量比2∶ 1、磺化温度190 ℃和磺化时间10 h的条件下，制备的豆渣基固体酸BD-1-2对大豆油的环氧化反应表现出较好的催化性能，环氧大豆油的环氧值达到6.30%；BD-1-2在200 ℃以内可保持热力学性质稳定; 扫描电镜结果显示,BD-1 ...
刘鹏1，谢梦姣1，罗德仪1，周喜1, 2 LIU Peng1, XIE Mengjiao1, LUO Deyi1, ZHOU Xi1, 2
doaj +1 more source
, 2020 Sulfonated aromatic polymers (SAP) have been shown to be promising materials for proton exchange membranes (PEM) due to their high thermal and chemical stability as well as lower-cost production compared to commercial available perfluoro sulfonated ...
Piyachai Khomein +3 more
semanticscholar +1 more source