USP
Universidade de São Paulo

Omar Abdel Moneim Abou El Seoud

Professor Sênior - Departamento de Química Fundamental
Polymer and surfactant group
3091-3874 
 elseoud@iq.usp.br

 

Resumo 

Nosso grupo vem desenvolvendo trabalhos abrangendo as seguintes linhas:

1-Química Verde: Síntese, propriedades de líquidos iônicos e suas misturas com solventes moleculares. Emprego como solventes para reações químicas, na derivatização e recelagem de biopolímeros.

2-Polímeros Naturais Modificados: Estratégias para derivatização de celulose sob condições homogêneas de reação; propriedades e aplicações dos derivados obtidos (ésteres, ésteres mistos, e éteres) e de sues compósitos. 

3-Síntese e Aplicação de Tensoativos Verdes: Síntese de tensoativos verdes a base de açucares e líquidos iônicos; estudo das propriedades de suas soluções. Aplicações como catalisadores de reações químicas, na formação de emulsões e micro-emulsões, e na descontaminação de solo.

4- Estabilidade dos asfaltenos e uso de inibidores de precipitação.

5-Educação em Química: Educação para desenvolvimento sustentável. 

 

Summary Our research group is interested in the following research topics:

1-Green Chemistry: Synthesis and properties of ionic liquids and their mixtures with molecular solvents and applications as media for chemical reactions, derivatization and recycling of biopolymers. 

2-Modified biopolymers: Strategies for cellulose derivatization; properties and applications of the products obtained (esters; mixed esters, and ethers) and their composites.

3-Synthesis, properties and Applications of Green Surfactants: Synthesis of sugar-based surfactants and ionic liquid-based surfactants; properties of their solutions. Applications including as catalysts of chemical reactions, for the formation of emulsions and microemulsions, and in soil decontamination.

4- Asphaltene stability and precipitation inhibition.

5-Education in Chemistry: Education for sustainable development.

 

Recent Publications 

1- Vaid, Z. S.; Kumar, A.; El Seoud, O. A.; Malek, N. I. (2017)

Drug induced micelle-to-vesicle transition in aqueous solutions of cationic surfactants

RCS Advances, 7, 3861-3869

 2-El Seoud, O. A.; Baader, W. J.; Bastos, E. L. (2017)

Practical chemical kinetics in solution.

Enycloppedia of physical Organic Chemistry, 1 ed., Wiley, N. Y., v. 1, 369-436.

 3- de Jesus, J. C.; Pires, P. A. R.; Mustafa, R.; Riaz, N.; El Seoud, O. A. (2017)

Experimental and theoretical studies on solvation in aqueous solutions of ionic liquids carrying different side chains: The n-butyl- versus the methoxyethyl group.

RCS Advances,7, 15952-15963

 4- Achtel, C.; Jedvert, K.; Kosan, B.; El Seoud, O. A.,; Heinze, T. (2017)

Dissolution capacity of novel cellulose solvents based on triethyloctylammonium chloride.

In press, Macromol. Chem. Phys., 218, 1700208

 5- de Jesus J. C.; Pires, P. A. R.; Scharf, M.; A. El. Seoud, O. A (2017)

Solvation by aqueous solutions of imidazole-based ionic liquids: 2- A comparison between alkyl and alkoxy side-chains.

Fluid Phase Equilibria, 451, 48-56.

 6- More, U.U.; Vaid, Z. S.; Rajput, S. M.; Malek, N. I., El Seoud, O. A. (2017)

Effects of 1-alkyl-3-methylimidazolium bromide ionic liquids on the micellar properties of butanediyl-1,4-bis (dimethyldodecylammonium bromide)] gemini Surfactant in aqueous solution

Colloid Polym. Sci., 295, 2351-2361.

 7- Rajput, S. M.; Kumar, S.; Aswal, V. A.; EI Seoud, O. A.; Malek, N. I.; Kumar Kailasa, S. K. (2018)

Drug-induced micelle-to-vesicle transition of a cationic gemini surfactant: Potential applications in Drug Delivery

ChemPhysChem, 19, 1-9.

 8-Vaid, Z. S.; Rajput, S.; Kuddushi, M.; Kumar, A.; El Seoud, O. A.; Malek, N. I. (2018)

Synergistic interaction between cholesterol and functionalized ionic liquid based surfactant leading to the morphological transition

ChemistrySelect, 3, 1300-1308.

 9- Achtel, C.; Jedvert, K.; Kostag, M.; El Seoud, O. A.; Heinze, T. (2018)

Surprising insensitivity of homogeneous acetylation of cellulose dissolved in triethyl(n-octyl)ammonium chloride/molecular solvent on the solvent polarity

Macromol. Matl. Eng. 303, 1800032.

 10- Novaki,L. P.; Lira, R.; Kwon,M. M. N.; de Oliveira, M. C. K.; Meireles, F. A.; Gonzalez, G.; El Seoud, O. A. (2018)

A successful approach to mimic the solvent power of maltenes based on SARA analysis, solvatochromic- and solubility parameters.

Energy & Fuels, 32, 3281−3289

11- El Seoud, O. A.; Novaki, L. P.; Possidonio, S.; Chinelatto, A. M.; d’Almeida e Silva, M. J. L.; Brotero,  P.P. (2018)

The chemistry of beverages for high school students: A project on extraction and analysis of caffeine from guaraná powder

JLabChemEduc, 6, 12-17

 12- Kostag, M.; Jedvert, K.; Achtel, C.; Heinze, T.; El Seoud, O. A. (2018)

Recent Advances in Solvents for Dissolution, Shaping and Derivatization of Cellulose: Quaternary Ammonium Electrolytes and their Solutions in Water and Molecular Solvents

Molcules 23, 511

 13- Heinze, T.; El Seoud, O. A.; Koschella, A (2018)

Book: Cellulose Derivatives: Synthesis, Structure, and Properties, Springer Series on Polymer and Composite Materials, 531pp. ISSN 2364-1878 (https://doi.org/10.1007/978-3-319-73168-1)

 14- Cabello, M. D.; El Seoud, O. A.; Baader, W. J. (2018)

Effect of ionic liquids on the kinetics ans quantum efficiency of peroxyoxalate chemiluminescence in aqueous media

J. Photochem. Phobiolog. A., 367, 471-478.15- Kuddushia, M.; Patela, N. K.; Rajputa, S.; Shaha, A.; El Seoud, O. A.; Maleka, N. I. (2018)

15-Thermo-switchable de Novo Ionic Liquid Based Gelators with Dye Absorbing and Drug Encapsulating Characteristics

ACS Omega, 3, 12068−12078

16- Tayel, A.; Ramadan, A.; El Seoud, O. A. (2018)

Titanium Dioxide/Graphene and Titanium Dioxide/Graphene Oxide Nanocomposites: Synthesis, Characterization and Photocatalytic Applications 
for Water Decontamination.

Catalysis, 8, 491.

17-Thermo-switchable de Novo Ionic Liquid Based Gelators with Dye Absorbing and Drug Encapsulating Characteristics

Kuddushia, M.; Patela, M. K.; Rajputa, S.; Shaha, A.; El Seoud, O. A.; Maleka, N. I. (2018)

ACS Omega, 3, 12068−12078

 18- Novaki, L. P.; Keppeler, N.; Kwon, M. M. N.; Paulucci, L. T.; de Oliveira, M. C. K.;. Meireles, F. A.; Baader, W. J.;  El Seoud, O. A. (2019)

Dissolution of asphaltene in binary mixtures of organic solvents and model maltenes: Unambiguous evidence for asphaltene preferential solvation and relevance to assessing the efficiency of additives for asphaltene stabilization

Energy & Fuels, 33, 58-67

19- Bioni, T. A.; Malek, N. I.; El Seoud, O. A. (2018)

Kinetics of Cellulose Acylation with Carboxylic Anhydrides and N-acylimidazoles in Ionic Liquid/Molecular Solvent Mixtures: Relevance to the Synthesis of Mixed Cellulose Esters,

Lenzinger Ber. 94 , 57-66

 20- Ferreira, D. C.; Bastos, G. S.; Pfeiffer, A.; Petri, D. F. S.; Heinze, T.; El Seoud, O. A. (2018)

Cellulose Carboxylate/Tosylate Mixed Esters: Dependence of their Physicochemical Properties

on the Degree of Carboxylate Substitution

Lenzinger Ber. 94, 43-55

 21- Ferreira, D. C.; Oliveira, M. L.; Bioni, T. A.; Nawaz, H.; King, A. W.; Kilpeläinen, I.; Hummeld, M.; Sixta, H.; El Seoud, O. A. (2019)

Binary mixtures of ionic liquids-DMSO as solvents for the dissolution and derivatization of cellulose: Effects of alkyl and alkoxy side chains

Carbohy. Polym., 212, 206-214

 22- Kostag, M.; Gericke, M.; Heinze, T. El Seoud, O. A. (2019)

Twenty-five years of cellulose chemistry: Innovations in the dissolution of the biopolymer and its transformation into esters and ethers

Cellulose, 26, 139-184.

 23- Godoy, A. P.; Ecorchard, P.; Benes, h.; Tolasz, J.; Smržová, d.; Pedrotti, j.; El Seoud4, O. A.; Ricardo K. Donato, R. K. (2019)

Ultrasound exfoliation of graphite in biphasic liquid systems containing (eliminate: polyaromatic) ionic liquids: a successful protocol for obtaining large few-layers graphene

Ultrasonics – Sonochemistry, 55, 279-288

  24- Pires, P. A. R.; El Seoud, O. A.; Machado, V. G.; de Jesus, J. C.; de Melo, C. E. A.; Buske, J. L. O.;  Cardozo, A. P. (2019)

Understanding solvation: Comparison of Reichardt’s solvatochromic probe and related molecular “core” structures

 J. Chem. Eng. Data, 64, 2213-2220; https://doi.org/10.1021/acs.jced.8b01192

25- Kostag, M.; El Seoud, O. A. (2019)

Dependence of cellulose dissolution in quaternary ammonium-based ionic liquids/DMSO on the molecular structure of the electrolyte. Carbohydrate Polymers 205 (2019) 524–532.

26- El Seoud, O. A.; Kostag, M.; Jedvert, K.; Malek, N. I. (2019)

Cellulose in Ionic Liquids and Alkaline Solutions: Advances in the Mechanisms of Biopolymer Dissolution and Regeneration. Polymers, 11, 1917, doi:10.3390/polym11121917

27- Kostag, M.; Dignani, M. T.; Lourenço, M. C.; Bioni, T. A.; El Seoud, O. A. (2019)

Assessing cellulose dissolution efficiency in solvent systems based on a robust experimental quantification protocol and enthalpy data. Holzforschung, 73, 1103–1112. doi.org/10.1515/hf-2019-0086

28- Dias, A. P.; Santos, S. da Silva; da Silva, J. V.; Parise-Filho, R.; Ferreira, E. I.; El Seoud, o. A.; , Giarolla, J. (2020)

Dendrimers in the context of nanomedicine. Intl. J. Pharmaceut. 573, 118814

 29- El Seoud, O. A.; Kostag, M.; Jedvert, K.; Malek, N. I (2020)

 Cellulose Regeneration and Chemical Recycling: Closing the “Cellulose Gap” Using Environmentally

Benign Solvents. Macromol. Mater. Eng. 2020, 1900832 DOI: 10.1002/mame.201900832.

30- Kostag, M.; Pires, P. A. R.: El Seoud, O. A. (2020)

Dependence of cellulose dissolution in quaternary ammonium acetates/DMSO on the molecular structure of the electrolyte: use of solvatochromism, micro-calorimetry, and molecular dynamics simulations.

Cellulose, 27(7), 3565-3580. doi.org/10.1007/s10570-020-03050-8 

31- Keppeler, N.; El Seoud, O. A. (2020)

Dissolution, Regeneration, and Chemical Recycling of Polycotton. J. Lab. Chem. Educ., 8, 11-17. 

32- Bioni, T. A.; de Oliveira, M. L.; Dignani, M. T.; El Seoud, O. A (2020)

Understanding the efficiency of ionic liquids–DMSO as solvents for carbohydrates: use of solvatochromic- and related physicochemical properties. New J. Chem., 44, 4906--14914, DOI: 10.1039/d0nj02258f.

33- Kuddushi, M.; Kumar, A.; Ray, D.; Aswal, V.; El Seoud, O.; Malek, N. (2020)

Concentration and Temperature Responsive Reversible Transition in Amide Functionalized Surface Active Ionic Liquids: Micelles to Vesicles to Organogel. ACS Omega, (2020), 5(38), 24272-24284 doi.org/10.1021/acsomega.0c02397

34- Kostag, M.; Jedvert, K.; El Seoud, O. A.  (2020)

 Engineering of sustainable biomaterial composites fromcellulose and silk fibroin: Fundamentals and applications

Intl. J. Biol. Macromolecules 167, 687–718, /doi.org/10.1016/j.ijbiomac.2020.11.151.

35- Dignani, M. T.; Bioni, T. A.; Paixão, T. R. L. C., El Seoud, O. A. (2020)

 Cellulose Dissolution in Mixtures of Ionic Liquids and Dimethyl Sulfoxide: A Quantitative Assessment of the Relative Importance of Temperature and Composition of the Binary Solvent. Molecules, 25, 5975; 10.3390/molecules25245975

36- El Seoud, O. A.; Bioni, T. A.; Dignani, M. T. (2021)

Understanding cellulose dissolution in ionic liquid-dimethyl sulfoxide binary mixtures: Quantification of the relative importance of hydrogen bonding and hydrophobic interactions. J. of Mol. Liq. 322, 114848, doi.org/10.1016/j.molliq.2020.114848

37- Keppeler, N.; Galgano, P. D.; Santos, S. S.; Malek, N. I.; El Seoud, O. A. (2021)

On the effects of head-group volume on the adsorption and aggregation of 1-(n-hexadecyl)-3-Cm-imidazolium bromide and chloride surfactants in aqueous solutions. J. Mol. Liq. 328, 115478; 10.1016/j.molliq.2021.115478.

38- Novaki, L. P.; Chinelatto, A. M.; Silva, V. A. B.; El Seoud, O. A. (2021)

 Analysis of consumer products: Demonstrating the power of LC-MS/MS for the simultaneous analysis of caffeine and other methylxanthines in guaraná fruit powder extract. J. Chem. Educ. 98, 2083−2089;10.1021/acs.jchemed.0c01069

39- Kostag, M.; El Seoud, O. A. (2021)

 Sustainable biomaterials based on cellulose, chitin and chitosan composites - A review

Carbohydr. Polym. Technolog. Appl. 100079, https://doi.org/10.1016/j.carpta,2021.100079

40- Polez, R.T.; Rodrigues, R. V. M; El Seoud, O. A.; Frollini, E (2021)

Electrospinning of cellulose carboxylic esters synthesized under homogeneous conditions: Effects of the ester degree of substitution and acyl group chain length on the morphology of the fabricated mats. Journal of Molecular Liquids 339 (2021) 116745; doi.org/10.1016/j.molliq.2021.116745.

 

 

 


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Curriculo (Sistema Lattes - CNPq)

Curriculo (Sistema Researcher ID)