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Wang H, Li Y, Dai Y, Ma L, Di D, Liu J. Screening, structural characterization and anti-adipogenesis effect of a water-soluble polysaccharide from Lycium barbarum L. by an activity-oriented approach. FOOD BIOSCI 2023. [DOI: 10.1016/j.fbio.2023.102502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
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Sarymsakov AA, Yarmatov SS, Yunusov KE. Preparation and Physicochemical Properties of a Hemosorbent Derived from Bombyx mori Cocoon Fibroin. RUSS J APPL CHEM+ 2022. [DOI: 10.1134/s1070427222070096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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El Seoud OA, Kostag M, Possidonio S, Dignani MT, Pires PAR, Lourenço MC. Dissolution of Silk Fibroin in Mixtures of Ionic Liquids and Dimethyl Sulfoxide: On the Relative Importance of Temperature and Binary Solvent Composition. Polymers (Basel) 2021; 14:polym14010013. [PMID: 35012038 PMCID: PMC8747519 DOI: 10.3390/polym14010013] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 12/09/2021] [Accepted: 12/16/2021] [Indexed: 02/07/2023] Open
Abstract
We studied the dependence of dissolution of silk fibroin (SF) in mixtures of DMSO with ionic liquids (ILs) on the temperature (T = 40 to 80 °C) and DMSO mole fraction (χDMSO = 0.5 to 0.9). The ILs included BuMeImAcO, C3OMeImAcO, AlBzMe2NAcO, and Bu4NAcO; see the names and structures below. We used design of experiments (DOE) to determine the dependence of mass fraction of dissolved SF (SF-m%) on T and χDMSO. We successfully employed a second-order polynomial to fit the biopolymer dissolution data. The resulting regression coefficients showed that the dissolution of SF in BuMeImAcO-DMSO and C3OMeImAcO-DMSO is more sensitive to variation of T than of χDMSO; the inverse is observed for the quaternary ammonium ILs. Using BuMeImAcO, AlBzMe2NAcO, and molecular dynamics simulations, we attribute the difference in IL efficiency to stronger SF-IL hydrogen bonding with the former IL, which is coupled with the difference in the molecular volumes and the rigidity of the phenyl ring of the latter IL. The order of SF dissolution is BuMeImAcO-DMSO > C3OMeImAcO-DMSO; this was attributed to the formation of intramolecular H-bonding between the ether oxygen in the side chain of the latter IL and the relatively acidic hydrogens of the imidazolium cation. Using DOE, we were able to predict values of SF-m%; this is satisfactory and important because it results in economy of labor, time, and material.
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Affiliation(s)
- Omar A. El Seoud
- Institute of Chemistry, The University of São Paulo, Sao Paulo 05508-000, Brazil; (M.K.); (M.T.D.); (P.A.R.P.); (M.C.L.)
- Correspondence:
| | - Marc Kostag
- Institute of Chemistry, The University of São Paulo, Sao Paulo 05508-000, Brazil; (M.K.); (M.T.D.); (P.A.R.P.); (M.C.L.)
| | - Shirley Possidonio
- Department of Chemistry, Institute of Environmental, Chemical, and Pharmaceutical Sciences, Federal University of São Paulo, Sao Paulo 04021-001, Brazil;
| | - Marcella T. Dignani
- Institute of Chemistry, The University of São Paulo, Sao Paulo 05508-000, Brazil; (M.K.); (M.T.D.); (P.A.R.P.); (M.C.L.)
| | - Paulo A. R. Pires
- Institute of Chemistry, The University of São Paulo, Sao Paulo 05508-000, Brazil; (M.K.); (M.T.D.); (P.A.R.P.); (M.C.L.)
| | - Matheus C. Lourenço
- Institute of Chemistry, The University of São Paulo, Sao Paulo 05508-000, Brazil; (M.K.); (M.T.D.); (P.A.R.P.); (M.C.L.)
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Abdelghafour MM, Orbán Á, Deák Á, Lamch Ł, Frank É, Nagy R, Ádám A, Sipos P, Farkas E, Bari F, Janovák L. The Effect of Molecular Weight on the Solubility Properties of Biocompatible Poly(ethylene succinate) Polyester. Polymers (Basel) 2021; 13:2725. [PMID: 34451264 PMCID: PMC8398594 DOI: 10.3390/polym13162725] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/04/2021] [Accepted: 08/11/2021] [Indexed: 01/08/2023] Open
Abstract
Poly(ethylene succinate) (PES) is one of the most promising biodegradable and biocompatible polyesters and is widely used in different biomedical applications. However, little information is available on its solubility and precipitation properties, despite that these solution behavior properties affect its applicability. In order to systematically study these effects, biodegradable and biocompatible poly(ethylene succinate) (PES) was synthesized using ethylene glycol and succinic acid monomers with an equimolar ratio. Despite the optimized reaction temperature (T = 185 °C) of the direct condensation polymerization, relatively low molecular mass values were achieved without using a catalyst, and the Mn was adjustable with the reaction time (40-100 min) in the range of ~850 and ~1300 Da. The obtained crude products were purified by precipitation from THF ("good" solvent) with excess of methanol ("bad" solvent). The solvents for PES oligomers purification were chosen according to the calculated values of solubility parameters by different approaches (Fedors, Hoy and Hoftyzer-van Krevelen). The theta-solvent composition of the PES solution was 0.3 v/v% water and 0.7 v/v% DMSO in this binary mixture. These measurements were also allowed to determine important parameters such as the coefficients A (=0.67) and B (=3.69 × 104) from the Schulz equation, or the Kη (=8.22 × 10-2) and α (=0.52) constants from the Kuhn-Mark-Houwink equation. Hopefully, the prepared PES with different molecular weights is a promising candidate for biomedical applications and the reported data and constants are useful for other researchers who work with this promising polyester.
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Affiliation(s)
- Mohamed M. Abdelghafour
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (M.M.A.); (Á.O.); (Á.D.)
- Department of Chemistry, Faculty of Science, Zagazig University, Zagazig 44519, Egypt
| | - Ágoston Orbán
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (M.M.A.); (Á.O.); (Á.D.)
| | - Ágota Deák
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (M.M.A.); (Á.O.); (Á.D.)
| | - Łukasz Lamch
- Department of Organic and Pharmaceutical Technology, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland;
| | - Éva Frank
- Department of Organic Chemistry, University of Szeged, Dóm tér 8, H-6720 Szeged, Hungary;
| | - Roland Nagy
- Department of MOL Department of Hydrocarbon and Coal Processing, Faculty of Engineering, University of Pannonia, Egyetem Str. 10, H-8200 Veszprém, Hungary;
| | - Adél Ádám
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; (A.Á.); (P.S.)
| | - Pál Sipos
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; (A.Á.); (P.S.)
| | - Eszter Farkas
- HCEMM-USZ Cerebral Blood Flow and Metabolism Research Group, University of Szeged, Dugonics Square 13, H-6720 Szeged, Hungary;
- Department of Cell Biology and Molecular Medicine, Faculty of Science and Informatics & Faculty of Medicine, University of Szeged, Somogyi Str. 4, H-6720 Szeged, Hungary
- Department of Medical Physics and Informatics, Faculty of Medicine & Faculty of Science and Informatics, University of Szeged, Korányi Fasor 9, H-6720 Szeged, Hungary;
| | - Ferenc Bari
- Department of Medical Physics and Informatics, Faculty of Medicine & Faculty of Science and Informatics, University of Szeged, Korányi Fasor 9, H-6720 Szeged, Hungary;
| | - László Janovák
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (M.M.A.); (Á.O.); (Á.D.)
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Atta A, Abdelhamied MM, Abdelreheem AM, Berber MR. Flexible Methyl Cellulose/Polyaniline/Silver Composite Films with Enhanced Linear and Nonlinear Optical Properties. Polymers (Basel) 2021; 13:polym13081225. [PMID: 33920111 PMCID: PMC8069183 DOI: 10.3390/polym13081225] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Revised: 04/01/2021] [Accepted: 04/06/2021] [Indexed: 01/18/2023] Open
Abstract
In order to potentiate implementations in optical energy applications, flexible polymer composite films comprising methyl cellulose (MC), polyaniline (PANI) and silver nanoparticles (AgNPs) were successfully fabricated through a cast preparation method. The composite structure of the fabricated film was confirmed by X-ray diffraction and infrared spectroscopy, indicating a successful incorporation of AgNPs into the MC/PANI blend. The scanning electron microscope (SEM) images have indicated a homogenous loading and dispersion of AgNPs into the MC/PANI blend. The optical parameters such as band gap (Eg), absorption edge (Ed), number of carbon cluster (N) and Urbach energy (Eu) of pure MC polymer, MC/PANI blend and MC/PANI/Ag films were determined using the UV optical absorbance. The effects of AgNPs and PANI on MC polymer linear optical (LO) and nonlinear optical (NLO) parameters including reflection extinction coefficient, refractive index, dielectric constant, nonlinear refractive index, and nonlinear susceptibility are studied. The results showed a decrease in the band gap of MC/PANI/AgNPs compared to the pure MC film. Meanwhile, the estimated carbon cluster number enhanced with the incorporation of the AgNPs. The inclusion of AgNPs and PANI has enhanced the optical properties of the MC polymer, providing a new composite suitable for energy conversion systems, solar cells, biosensors, and nonlinear optical applications.
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Affiliation(s)
- Ali Atta
- Physics Department, College of Science, Jouf University, Sakaka P.O. Box: 2014, Saudi Arabia;
- Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Cairo P.O. Box: 29, Egypt; (M.M.A.); (A.M.A.)
| | - Mostufa M. Abdelhamied
- Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Cairo P.O. Box: 29, Egypt; (M.M.A.); (A.M.A.)
| | - Ahmed M. Abdelreheem
- Radiation Physics Department, National Center for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), Cairo P.O. Box: 29, Egypt; (M.M.A.); (A.M.A.)
| | - Mohamed R. Berber
- Chemistry Department, College of Science, Jouf University, Sakaka P.O. Box: 2014, Saudi Arabia
- Department of Chemistry, Faculty of Science, Tanta University, Tanta 31527, Egypt
- Correspondence: ; Tel.: +96-61-4654-4613
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Kostag M, Jedvert K, El Seoud OA. Engineering of sustainable biomaterial composites from cellulose and silk fibroin: Fundamentals and applications. Int J Biol Macromol 2020; 167:687-718. [PMID: 33249159 DOI: 10.1016/j.ijbiomac.2020.11.151] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2020] [Revised: 11/13/2020] [Accepted: 11/23/2020] [Indexed: 12/18/2022]
Abstract
This review addresses composites prepared from cellulose (Cel) and silk fibroin (SF) to generate multifunctional, biocompatible, biodegradable materials such as fibers, films and scaffolds for tissue engineering. First, we discuss briefly the molecular structures of Cel and SF. Their structural features explain why certain solvents, e.g., ionic liquids, inorganic electrolyte solutions dissolve both biopolymers. We discuss the mechanisms of Cel dissolution because in many cases they also apply to (much less studied) SF dissolution. Subsequently, we discuss the fabrication and characterization of Cel/SF composite biomaterials. We show how the composition of these materials beneficially affects their mechanical properties, compared to those of the precursor biopolymers. We also show that Cel/SF materials are excellent and versatile candidates for biomedical applications because of the inherent biocompatibility of their components.
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Affiliation(s)
- Marc Kostag
- Institute of Chemistry, The University of São Paulo, Professor Lineu Prestes Av. 748, 05508-000 São Paulo, SP, Brazil
| | - Kerstin Jedvert
- Fiber Development, Materials and Production, Research Institutes of Sweden (RISE IVF), Box 104, SE-431 22 Mölndal, Sweden
| | - Omar A El Seoud
- Institute of Chemistry, The University of São Paulo, Professor Lineu Prestes Av. 748, 05508-000 São Paulo, SP, Brazil.
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Barakat H, Lago WSR, Aymes-Chodur C, Ahoussou AP, Yagoubi N. Multi detection in Size-Exclusion Chromatography of electron beam irradiated Ethylene Norbornene Copolymers. Polym Degrad Stab 2018. [DOI: 10.1016/j.polymdegradstab.2017.11.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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