Results 51 to 60 of about 5,961 (198)

Synthesis in pilot plant scale and physical properties of sulfonated polystyrene

Journal of the Brazilian Chemical Society, 2003
The homogenous sulfonation of polystyrene was developed in a pilot plant scale producing polymers with different sulfonation degrees (18 to 22 mole % of sulfonated styrene units).
Martins Cristiane R., Ruggeri Giacommo, De Paoli Marco-A.   +2 more
doaj  

Synergistic Molecular Modulation of ππ Stacking for High‐Performance Pitch‐Derived Hard Carbon Anodes

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A synergistic molecular strategy is demonstrated to disrupt intrinsic ππ stacking in pitch, boosting 6‐fold sulfonation, yielding a hard carbon with 0.371 nm interlayer spacing and maximized closed pores, and achieving a high reversible capacity, remarkable rate capability (205.6 mAh g−1 at 2 A g−1) and cyclic stability.
Xiang Wang, Yangyang Chu, Shuaipeng Liu, Ruyao Zhang, Zeyu Zhu, Qiang Li, Weixiang Li, Ya‐Xia Yin, Sailong Xu   +8 more
wiley   +1 more source

Rapid transformation of sulfinate salts into sulfonates promoted by a hypervalent iodine(III) reagent

Beilstein Journal of Organic Chemistry, 2018
An alternative method for forming sulfonates through hypervalent iodine(III) reagent-mediated oxidation of sodium sulfinates has been developed. This transformation involves trapping reactive sulfonium species using alcohols. With additional optimization
Elsa Deruer, Vincent Hamel, Samuel Blais, Sylvain Canesi   +3 more
doaj   +1 more source

Lignocellulosic Triboelectric Materials for Energy Harvesting and Emerging Applications: A Review on Lignin‐Molecular Engineering toward Improved Performance

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Contrasting sustainable biomass with depleting petroleum resources, this review charts the evolutionary timeline of lignin‐based TENGs. We systematically evaluate their fundamental mechanisms, enhancement strategies, and applications in green self‐powered electronics.
Yuxin Yang, Boyu Du, Yuwen Wang, Tian Tang, Yuxuan Xie, Jiajun Zhang, Yajun Zhang, Jingyu Xu, Xing Wang, Chuanyin Xiong   +9 more
wiley   +1 more source

Revolutionizing Biodiesel Synthesis: Kinetic and Thermodynamic Insights with Carbonized Doum-Shell Catalyst [PDF]

Trends in Ecological and Indoor Environmental Engineering
Background: Conventional methods of biodiesel (FAME) synthesis often involve transesterification processes that are catalysed by homogeneous catalysts, which present challenges in terms of catalyst recovery, environmental impact, and production cost ...
Abdulhalim Musa Abubakar, Haruna Mavakumba Kefas, Yusufu Luka, Jimzibea Jehu Kawuwa   +3 more
doaj   +1 more source

Influence of sulfonation degree and deposition technique on the electrical and morphological properties of sulfonated polystyrene thin films

Polymer International, EarlyView.
Sulfonated polystyrene films with different degrees of sulfonation were fabricated using Langmuir–Schaefer and drop‐casting techniques. Both the deposition method and sulfonation level strongly affect film morphology and electrical response, governing the performance of these materials as ammonia gas sensors.
Maria Eduarda RS Medina, Jéssyka C Bittencourt, Vinicius JRO Patzer, Marcelo S Borro, Antônio JF de Carvalho, Debora T Balogh, Roger C Hiorns, Deuber LS Agostini, Clarissa A Olivati   +8 more
wiley   +1 more source

Synthesis of Poly(Itaconate)s With High Monomer Conversion Applying Emulsion Polymerization

Journal of Polymer Science, Volume 63, Issue 6, Page 1284-1296, 15 March 2025.
Itaconic acid and its derivatives are a promising and bio‐based substitute for oil‐based polymers such as acrylates. In this study, the optimization of polymerization of itaconic acid esters is described by applying emulsion polymerization leading to high reaction conversions and low residual monomer contents. ABSTRACT Itaconic acid and its derivatives
S. Charlotte Fischer von Mollard, Nico Ueberschaar, Martin Schreiber, Frank Kamphuis, Stefan Zechel, Martin D. Hager   +5 more
wiley   +1 more source

THE SULFONATION STUDY OF REACTION MECHANISM ON PAPAVERINE ALKALOID BY GC-MS AND FT-IR

Indonesian Journal of Chemistry, 2010
The aim of this research was to prove theoretical mechanism reaction on the sulfonation of papaverine alkaloid and the result could be used as a reference on the transformation of these alkaloid to the other derivatives.
I Made Sudarma
doaj   +1 more source

Building Sulfone Bridges: Multi‐Technique Analysis of Thermally Induced Cross‐Linking in Highly Sulfonated Poly(Phenylsulfone)

Journal of Polymer Science, EarlyView.
Highly sulfonated poly(phenylsulfone) undergoes controlled thermal cross‐linking through sulfone bridge formation, exploiting the dual role of sulfonic acid groups as both proton‐conducting functionalities and reactive precursors. The resulting fluorine‐free membranes exhibit enhanced hydrolytic, thermal, and mechanical stability while maintaining ...
A. Fahs, J.‐F. Chailan, E. Sgreccia, M. Vagnarelli, L. Pasquini, P. Knauth, M. L. Di Vona   +6 more
wiley   +1 more source

SYNTHESIS OF POROUS CARBON MATERIAL PROPYLENE MEDICAL MASK AS ADSORBENT HEAVY METAL IRON (Fe) IN WATER EX-TIN MINING BANGKA BELITUNG

Jurnal Kimia Riset
Bangka Belitung Islands Province faces severe environmental challenges, exacerbated by illegal tin mining activities leading to heightened pollution levels, particularly in stagnant water within former tin mining holes, reaching depths of up to 40 meters.
Addela Amelia, Faizah Alivia Putri, Widia, Della Adelia, Alkasiyah, Verry Andre Fabiani   +5 more
doaj   +1 more source