Results 61 to 70 of about 11,637 (219)
Synthesis, Characterization, and Properties of Sulfonated Chitosan for Protein Adsorption
International Journal of Polymer Science, 2020 Chitosan sulfate was prepared and characterized as a new chromatography media for protein separation. The degree of sulfonation of chitosan could be well controlled and impacted under conditions in the synthesis process.
Xiaomin Zhang, Jie Sun
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Biofuels, Bioproducts and Biorefining, EarlyView.Abstract Among the Porphyridium genus, Porphyridium marinum exhibits the highest phycoerythrin (PE) content. In this study, the metabolic trade‐off between biomass, PE, and sulfated exopolysaccharide (EPS) production was assessed under varying nitrogen and sulfur availability, light intensity, residence time, and cultivation mode.
Rosaria Tizzani +3 more
wiley +1 more source
International Journal of Electrochemical Science, 2015 A type of poly(aminobenzene sulfonic)phosphazene derivative grafted SPEEK was synthesized which were confirmed by FT-IR and NMR analysis. And a series of grafted SPEEK proton exchange membranes with 65% sulfonation degree were prepared.
Zhengping Zhao +3 more
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Zhongguo youzhi, 2022 以胜利褐煤为原料，通过浓硫酸一步炭化磺化法制备煤基固体酸催化剂，以油酸和甲醇的酯化反应评价催化剂的催化活性。采用单因素实验考察了固液比、磺化温度、磺化时间对催化活性的影响。采用红外光谱、元素分析、BET、SEM、XRD、热重分析等对煤基固体酸催化剂进行表征。结果表明，当磺化温度为110 ℃、磺化时间为90 min、固液比为1∶ 17时，煤基固体酸催化剂具有最优的催化活性，其催化油酸和甲醇的酯化反应的酯化率达到93.50%。煤基固体酸催化剂为具有较低石墨化程度的无定形碳结构，磺酸基已成功键合到了碳基载体上，
王雪，王克冰，钟源，刘玉玲 WANG Xue， WANG Kebing， ZHONG Yuan， LIU Yuling
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Phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs)
, 2015 Herein, we report the phase inversion of ionomer-stabilized emulsions to form high internal phase emulsions (HIPEs) induced by salt concentration and pH changes. The ionomers are sulfonated polystyrenes (SPSs) with different sulfonation degrees.
Cai, Zengxiao +3 more
core +1 more source
The Canadian Journal of Chemical Engineering, EarlyView.Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal +3 more
wiley +1 more source
Sulfonated (1→6)-β-D-Glucan (Lasiodiplodan): Preparation, Characterization and Bioactive Properties
Food Technology and Biotechnology, 2019 Sulfonated derivatives of lasiodiplodan (LAS-S) with different degrees of substitution (1.61, 1.42, 1.02 and 0.15) were obtained and characterized by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermal and ...
Gabrielle Cristina Calegari +5 more
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Membranes, 2023 Block copolymers generally have peculiar morphological characteristics, such as strong phase separation. They have been actively applied to polymer electrolyte membranes for proton exchange membrane fuel cells (PEMFCs) to obtain well-defined hydrophilic ...
Hoseong Kang +6 more
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Cross-linker effect in ETFE-based radiation-grafted proton-conducting membranes II. Extended fuel cell operation and degradation analysis [PDF]
, 2008 In this study the effect of crosslinker (divinylbenzene (DVB)) content on the chemical stability of poly(ethylene-alt-tetrafluoroethylene) (ETFE) based membranes using an H2O2 solution was carried out.
Alkan Gursel, Selmiye +8 more
core +2 more sources
Polymers, 2019 Sulfonated poly (ether ether ketone) (SPEEK) with four different sulfonation degrees (SDs) were prepared, and mixed with polyvinylidene fluoride (PVDF) to prepare four series of SPEEK/PVDF blend membranes.
Shaojian He +5 more
semanticscholar +1 more source