Superprotonic Conductivity of a UiO-66 Framework Functionalized with Sulfonic Acid Groups by Facile Postsynthetic Oxidation

2015 ◽  
Vol 127 (17) ◽  
pp. 5231-5235 ◽  
Author(s):  
Won Ju Phang ◽  
Hyuna Jo ◽  
Woo Ram Lee ◽  
Jeong Hwa Song ◽  
Kicheon Yoo ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups

scholarly journals Methoxylation of α-pinene over poly(vinyl alcohol) containing sulfonic acid groups

2009 ◽  
Vol 147 (2-3) ◽  
pp. 302-306 ◽  
Author(s):  
D.S. Pito ◽  
I.M. Fonseca ◽  
A.M. Ramos ◽  
J. Vital ◽  
J.E. Castanheiro
Keyword(s):  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Poly Vinyl Alcohol ◽  
Sulfonic Acid Groups

Do acid–base interactions really improve the ion conduction in a proton exchange membrane? – a study on the effect of basic groups

2019 ◽  
Vol 7 (34) ◽  
pp. 19820-19830 ◽  
Author(s):  
Yuqian Sui ◽  
Yexin Du ◽  
Huayuan Hu ◽  
Jieshu Qian ◽  
Xuan Zhang
Keyword(s):  
Physicochemical Properties ◽  
Sulfonic Acid ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Acid Base ◽  
Ion Conduction ◽  
Exchange Membrane ◽  
Sulfonic Acid Groups

Generating acid–base interactions between sulfonic acid groups in a proton exchange membrane (PEM) and the incorporation of basic groups are effective approaches to improving the physicochemical properties of a membrane.

Synthesis and characterisation of novel functional polyolefin containing sulfonic acid groups

2008 ◽  
Vol 44 (2) ◽  
pp. 475-482 ◽  
Author(s):  
Yi Zheng ◽  
Li Pan ◽  
Yan-Guo Li ◽  
Yue-Sheng Li
Keyword(s):  
Sulfonic Acid ◽  
Sulfonic Acid Groups

Synthesis of soluble sulfonated polybenzimidazoles derived from 2-sulfonate terephthalic acid

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Qunying Wu ◽  
Guyu Xiao ◽  
Deyue Yan
Keyword(s):  
Terephthalic Acid ◽  
Sulfonic Acid ◽  
Strong Acid ◽  
High Thermal Stability ◽  
Swelling Ratio ◽  
Solution Casting ◽  
Direct Polycondensation ◽  
Acid Base ◽  
Resistance To Oxidation ◽  
Sulfonic Acid Groups

Abstract2-Sulfonate p-terephthalic acid (sTA) was synthesized, and sulfonated polybenzimidazoles (sPBI) were prepared by direct polycondensation of 3,3’- diaminobenzidine (DAB) and sTA with 4,4’-oxybis(benzoic acid) (OBBA) or 2,2’- bis(4-carboxylphenyl)-hexafluoropropane (BCHFP). Thus the ether groups and hexafluoroisopropylidene units were incorporated into the backbone of the sPBI in order to improve the flexibility and solubility. The sPBI based on OBBA showed poor solubility, while the sPBI containing hexafluoroisopropylidene units were soluble in common solvents. sPBI-20 ~ sPBI-60 could form tough and transparent membranes by solution casting. sPBI indicated high thermal stability, the 5% weight loss temperature (T5%) which was higher than 520°C, decreased with the increase of degree of sulfonation. sPBI-20 ~ sPBI-60 showed no glass transition at temperatures lower than 380°C. In addition, sPBI showed low water uptake, low swelling ratio as well as excellent resistance to oxidation. But sPBI exhibited low proton conductivity because of the strong acid-base interactions between basic benzimidazole and sulfonic acid groups.

scholarly journals Preparation and Characterization of Self-Dispersing Phthalocyanine Blue 15:4 Pigment for Dyeing of Wool Textiles

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 741
Author(s):  
Lun Nie ◽  
Guangtao Chang ◽  
Ruoxin Li
Keyword(s):  
Sulfonic Acid ◽  
Coupling Reaction ◽  
Acid Dyes ◽  
Light Fastness ◽  
Grade 5 ◽  
Weather Resistance ◽  
Sulfonic Acid Groups ◽  
Positively Charged ◽  
Better Than

A self-dispersing pigment was produced by a diazonium coupling reaction; the pigment reacted with aromatic diazonium salts which were generated by the reaction of p-aminobenzene sulfonic acid and sodium nitrite. The surface of the pigment particles was negatively charged due to sulfonic acid groups on the pigment surface. The pigment particle size and zeta potential were, respectively, 134.5 nm and −45.4 mV at neutral pH. The wool surface was positively charged by adjusting the pH; then the anionic self-dispersing pigment dyed the cationic wool. The results show that self-dispersing pigment can adhere well without a binder, and that the K/S value is closely related to pH, dyeing time, and the amount of pigment. The color fastness of the wool was good and the light fastness of the wool was grade 5, which is better than acid dyes. Self-dispersing pigments are potential candidates for dyeing high-weather-resistance textiles.

The preparation of novel sulfonated poly(aryl ether ketone sulfone)/TiO2 composite membranes with low methanol permeability for direct methanol fuel cells

2020 ◽  
pp. 095400832095804
Author(s):  
Chengyun Yuan ◽  
Yinghan Wang
Keyword(s):  
Sulfonic Acid ◽  
Direct Methanol Fuel Cells ◽  
Composite Membranes ◽  
Methanol Permeability ◽  
Aryl Ether ◽  
Direct Methanol ◽  
Aryl Ether Ketone ◽  
Ether Ketone ◽  
Sulfonic Acid Groups ◽  
Sulfonated Poly

A sulfonated poly(aryl ether ketone sulfone) (SPAEKS) with locally dense sulfonic acid groups is synthesized and different amounts of TiO2 is doped into SPAEKS matrix to prepare composite membranes (SPAEKS/TiO2-x). SEM shows that TiO2 in the composite membranes has good dispersibility when TiO2 content is not higher than 3%. The composite membranes show good mechanical properties, dimensional stability and oxidative stability. The proton conductivity of composite membranes is near to that of Nafion 117 membrane and methanol permeability of composite membranes is much lower than that of Nafion 117 membrane. Therefore, the proton selectivity of composite membranes is higher than that of Nafion 117 membrane. In particular, proton selectivity of SPAEKS/TiO2-3% (12.8 × 104 S s cm−3) is four times higher than that of Nafion 117 membrane (3.2 × 104 S s cm−3).

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