1
|
Chiriac AP, Ghilan A, Croitoriu A, Serban A, Bercea M, Stoleru E, Nita LE, Doroftei F, Stoica I, Bargan A, Rusu AG, Chiriac VM. Study on cellulose nanofibrils/copolymacrolactone based nano-composites with hydrophobic behaviour, self-healing ability and antioxidant activity. Int J Biol Macromol 2024; 262:130034. [PMID: 38340942 DOI: 10.1016/j.ijbiomac.2024.130034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Revised: 01/29/2024] [Accepted: 02/05/2024] [Indexed: 02/12/2024]
Abstract
The multiple uses of cellulose nanofibrils (CNFs) originate from their availability from renewable resources, and are due to their physico-chemical properties, biodegradability and biocompatibility. At the same time, reducing sensitivity to humidity, increasing interfacial adhesion and hydrophobic modification of the CNF surface to diversify applications and improve operation, are current targets pursued. This study focuses on the preparation of a novel gel structure using cellulose nanofibrils (CNFs) and poly(ethylene brassylate-co-squaric acid) (PEBSA50/50), a bio-based copolymacrolactone. The primary goal is to achieve the gel with reduced sensitivity to humidity and enhanced hydrophobic behaviour. The new system was characterized in comparison to its constituent components using various techniques, such as Fourier transform infrared spectroscopy, thermal analysis, X-ray diffraction, and NIR - chemical imaging. Rheological tests demonstrated the formation of the CNF_PEBSA50/50 gel as a result of physical interactions between the two polymeric partners and revealed self-healing abilities for the prepared gels. Determination of the contact angle, surface free energy, as well as dynamic measurements of the vapour sorption of the CNF_PEBSA50/50 system, confirmed the achievement of the study's aim. Furthermore, the CNF_PEBSA50/50 network was utilized to encapsulate citric acid, resulting in the creation of a new bioactive composite with both antioxidant and antimicrobial activity.
Collapse
Affiliation(s)
- Aurica P Chiriac
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania.
| | - Alina Ghilan
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Croitoriu
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandru Serban
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Maria Bercea
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Elena Stoleru
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Loredana Elena Nita
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Florica Doroftei
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Iuliana Stoica
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Bargan
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alina Gabriela Rusu
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Vlad Mihai Chiriac
- Petru Poni Institute of Macromolecular Chemistry, 41 A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| |
Collapse
|
2
|
Condurache BC, Cojocaru C, Bargan A, Samoila P, Harabagiu V. Dynamic Adsorption of a Cationic Dye onto Wool Fibers as Column-Filling Media: Response Surface Optimization and Fixed-Bed Adsorption Modeling. Materials (Basel) 2024; 17:790. [PMID: 38399041 PMCID: PMC10890706 DOI: 10.3390/ma17040790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 01/26/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024]
Abstract
This study reports a simple and low-cost method for water purification using recyclable natural fibers (coarse wool fibers) as column-filling media for adsorption in the dynamic mode. As an instance of a dissolved organic pollutant, a cationic dye (basic blue 9, BB9) was assayed. According to the Langmuir isotherm (recorded at 300 K), the calculated maximum adsorption capacity of the fibrous material was found to be 24.86 mg/g for the retention of BB9. Response surface methodology (RSM) was employed for the design of experiments and the model-based optimization of the adsorption process performed in the dynamic regime (fixed-bed column). The optimal conditions provided by RSM indicated an adsorbent column height of H = 13.5 cm and a feed flow rate of Fv = 3 mL/min; these operating parameters ensured a color removal efficiency of 92.56% after 240 min of contact time. The recorded breakthrough curve under the optimal conditions was further interpolated using five quantitative mathematical models (Adams-Bohart, Thomas, Yoon-Nelson, Yan, and Clark) to assess the dynamic behaviors in the fixed-bed column. The best goodness-of-fit was achieved for the Thomas and Yoon-Nelson models. Thus, the coarse wool fibers used in a fixed bed demonstrated a relevant efficiency in the removal of cationic organic pollutants from contaminated water.
Collapse
Affiliation(s)
| | - Corneliu Cojocaru
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Bargan
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Petrisor Samoila
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Valeria Harabagiu
- "Petru Poni" Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| |
Collapse
|
3
|
Popovych AM, Tsymbal LV, Khomenko DM, Bargan A, Lampeka YD, Lampeka RD. Synthesis and crystal structure of a cadmium(II) coordination polymer based on 4,4'-(1 H-1,2,4-triazole-3,5-di-yl)dibenzoate. Acta Crystallogr E Crystallogr Commun 2024; 80:128-132. [PMID: 38333119 PMCID: PMC10848992 DOI: 10.1107/s2056989024000185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Accepted: 01/05/2024] [Indexed: 02/10/2024]
Abstract
The asymmetric unit of the title compound, catena-poly[[[aqua-bis-(pyridine-κN)cadmium(II)]-μ2-4,4'-(1H-1,2,4-triazole-3,5-di-yl)dibenzoato-κ4 O,O':O'',O'''] 4.5-hydrate], {[Cd(C16H9N3O4)(C5H5N)2(H2O)]·4.5H2O}n or {[Cd(bct)(py)2(H2O)]·4.5H2O}n (I), consists of a Cd2+ cation coordinated to one bct2- carboxyl-ate dianion, two mol-ecules of pyridine and a water mol-ecule as well as four and a half water mol-ecules of crystallization. The metal ion in I possesses a penta-gonal-bipyramidal environment with the four O atoms of the two bidentately coordinated carboxyl-ate groups and the N atom of a pyridine mol-ecule forming the O4N equatorial plane, while the N atom of another pyridine ligand and the O atom of the water mol-ecule occupy the axial positions. The bct2- bridging ligand connects two metal ions via its carb-oxy-lic groups, resulting in the formation of a parallel linear polymeric chain running along the [11] direction. The coordinated water mol-ecule of one chain forms a strong O-H⋯O hydrogen bond with the carboxyl-ate O atom of a neighboring chain, leading to the formation of double chains with a closest distance of 5.425 (7) Å between the cadmium ions belonging to different chains. Aromatic π-π stacking inter-actions between the benzene fragments of the anions as well as between the coordinated pyridine mol-ecules belonging to different chains results in the formation of sheets oriented parallel to the (01) plane. As a result of hydrogen-bonding inter-actions involving the water mol-ecules of crystallization, the sheets are joined together in a three-dimensional network.
Collapse
Affiliation(s)
- Anastasiia M. Popovych
- L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, 03028, Kyiv, Ukraine
| | - Liudmyla V. Tsymbal
- L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, 03028, Kyiv, Ukraine
| | - Dmytro M. Khomenko
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Pavlo Skoropadskyi st., 12, Kyiv 01033, Ukraine
- Enamine Ltd., Winston Churchill st., 78, Kyiv 02094, Ukraine
| | - Alexandra Bargan
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Grigore Ghika Voda 41A, RO-700487 Iasi, Romania
| | - Yaroslaw D. Lampeka
- L. V. Pisarzhevskii Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Prospekt Nauki 31, 03028, Kyiv, Ukraine
| | - Rostislav D. Lampeka
- Department of Chemistry, Taras Shevchenko National University of Kyiv, Pavlo Skoropadskyi st., 12, Kyiv 01033, Ukraine
| |
Collapse
|
4
|
Bibik YS, Khomenko DM, Doroshchuk RO, Raspertova IV, Bargan A, Lampeka RD. Synthesis and crystal structure of N1, N2-di-methyl-ethane-dihydrazide. Acta Crystallogr E Crystallogr Commun 2024; 80:148-151. [PMID: 38333116 PMCID: PMC10848980 DOI: 10.1107/s2056989024000239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 01/07/2024] [Indexed: 02/10/2024]
Abstract
The title compound, N 1,N 2-di-methyl-ethane-dihydrazide, C4H10N4O2, was obtained by the methyl-ation of oxalyl dihydrazide protected with phthalimide. The mol-ecule is essentially non-planar with a dihedral angle between the two planar hydrazide fragments of 86.5 (2)°. This geometry contributes to the formation of a multi-contact three-dimensional supra-molecular network via C-H⋯O, N-H⋯O and N-H⋯N hydrogen bonds.
Collapse
Affiliation(s)
- Yurii S. Bibik
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
| | - Dmytro M. Khomenko
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Roman O. Doroshchuk
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Ilona V. Raspertova
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
- Enamine Ltd., Winston Churchill St 78, Kyiv 02094, Ukraine
| | - Alexandra Bargan
- "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41A, 700487 Iasi, Romania
| | - Rostyslav D. Lampeka
- Department of Chemistry, Kyiv National Taras Shevchenko University, Volodymyrska St 64, Kyiv, Ukraine
| |
Collapse
|
5
|
Filip D, Macocinschi D, Nica SL, Asandulesa M, Condurache B, Stoleru E, Rata DM, Bargan A, Zaltariov MF. Hybrid green bionanocomposites based on chitosan/starch/gelatin and metallic nanoparticles for biological applications. Int J Biol Macromol 2023; 253:127571. [PMID: 37875185 DOI: 10.1016/j.ijbiomac.2023.127571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 10/12/2023] [Accepted: 10/19/2023] [Indexed: 10/26/2023]
Abstract
Multicomponent composites based on natural biopolymers: chitosan, starch and gelatin in two different ratios (0.5:1:1 and 1:1:1) were in situ crosslinked by intermolecular interactions and used as matrices for zinc oxide and magnetite fillers. The bionanocomposite films have been evaluated by spectral and microscopy methods: Fourier-Transform Infrared spectrometry (FT-IR), Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM) confirming the electrostatic and hydrogen bonding interactions between the components of the polymeric matrices and the inorganic fillers and the crosslinking process. AFM and SEM images showed a compact, non-porous and homogenous morphology of the hybrid films, proving a good miscibility of the blends. At lower concentrations of embedded filler, the composites were less hardened and more ductile due to the interaction with the polymeric matrix. Increased amounts of inorganic NPs led to the reduced mechanical properties of the prepared materials and increased thermal stability. The bionanocomposites revealed a similar behavior of the dielectric constant with frequency and increased values at higher temperatures. The wettability of the films' surface and the values of the water sorption capacity revealed a slight hydrophilicity of the bionanocomposites as compared with the initial matrices. The biocompatibility, evaluated by means of the surface free energy components and the interfacial tension with blood, and the hemolysis analysis demonstrated that the bionanocomposites possess a low risk of thrombosis, being promising materials for in vivo biomedical applications.
Collapse
Affiliation(s)
- Daniela Filip
- Laboratory of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Doina Macocinschi
- Laboratory of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Simona Luminita Nica
- Laboratory of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Mihai Asandulesa
- Laboratory of Electroactive Polymers and Plasmochemistry, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Bogdan Condurache
- Department of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Elena Stoleru
- Laboratory of Physical Chemistry of Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Delia Mihaela Rata
- Faculty of Medical Dentistry, Apollonia University of Iasi, Pacurari Street, No. 11, 700511, Iasi, Romania
| | - Alexandra Bargan
- Department of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania
| | - Mirela-Fernanda Zaltariov
- Department of Inorganic Polymers, "Petru Poni" Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, Iasi 700487, Romania.
| |
Collapse
|
6
|
Fortună ME, Ungureanu E, Rotaru R, Bargan A, Ungureanu OC, Brezuleanu CO, Harabagiu V. Synthesis and Properties of Modified Biodegradable Polymers Based on Caprolactone. Polymers (Basel) 2023; 15:4731. [PMID: 38139982 PMCID: PMC10748277 DOI: 10.3390/polym15244731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/15/2023] [Accepted: 12/15/2023] [Indexed: 12/24/2023] Open
Abstract
In this paper, the synthesis and characterization of two polycaprolactone-polydimethylsiloxane (PDMS-CL) copolymers with biodegradable properties are reported. A comparative study was carried out using an aminopropyl-terminated polydimethylsiloxane macro-initiator (APDMS) with two different molecular weights. The copolymers (PDMS-CL-1 and PDMS-CL-2) were obtained by ring-opening polymerization of ɛ-caprolactone using APDMS as initiators and stannous 2-ethylhexanoate as a catalyst. The copolymer's structures were confirmed by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (1H-NMR) spectra, and energy dispersion spectroscopy (EDX). Surface morphology was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The hydrophobic properties of the copolymers were demonstrated by the water contact angle and water vapor sorption capacity. Additionally, biological tests were conducted on San Marzano type tomato plants (Lypercosium esculentum) to assess the synthesized copolymers' susceptibility to the environment in terms of biological stability and metabolic activity. The biodegradation of PDMS-CL-1 and PDMS-CL-2 copolymers does not have a dangerous effect on the metabolic activity of plants, which makes it a convenient product in interaction with the environment.
Collapse
Affiliation(s)
- Maria E. Fortună
- Institute of Macromolecular Chemistry “Petru Poni”, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.E.F.); (R.R.); (A.B.); (V.H.)
| | - Elena Ungureanu
- “Ion Ionescu de la Brad” Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania;
| | - Răzvan Rotaru
- Institute of Macromolecular Chemistry “Petru Poni”, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.E.F.); (R.R.); (A.B.); (V.H.)
| | - Alexandra Bargan
- Institute of Macromolecular Chemistry “Petru Poni”, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.E.F.); (R.R.); (A.B.); (V.H.)
| | - Ovidiu C. Ungureanu
- “Vasile Goldis” Western University of Arad, 94 the Boulevard of the Revolution, 310025 Arad, Romania;
| | - Carmen O. Brezuleanu
- “Ion Ionescu de la Brad” Iasi University of Life Sciences, 3 Mihail Sadoveanu Alley, 700490 Iasi, Romania;
| | - Valeria Harabagiu
- Institute of Macromolecular Chemistry “Petru Poni”, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.E.F.); (R.R.); (A.B.); (V.H.)
| |
Collapse
|
7
|
Gradinaru I, Ciubotaru BI, Butnaru M, Cojocaru FD, Covașă CT, Bibire T, Dascalu M, Bargan A, Cazacu M, Zaltariov MF. The Impact of the Addition of Vitamins on a Silicone Lining Material to the Oral Mucosa Tissue-Evaluation of the Biocompatibility, Hydrolytic Stability and Histopathological Effect. Medicina (Kaunas) 2023; 59:1936. [PMID: 38003985 PMCID: PMC10673301 DOI: 10.3390/medicina59111936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Revised: 10/20/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023]
Abstract
Background and Objectives: One's quality of life depends on overall health, and in particular, oral health, which has been and continues to become a public health issue through frequent manifestations in various forms, from simple oral stomatitis (inflammations of the oral cavity) to the complicated oral health pathologies requiring medical interventions and treatments (caries, pulp necrosis and periodontitis). The aim of this study focused on the preparation and evaluation of vitamins (vitamin A, B1 and B6) incorporated into several silicone-based lining materials as a new alternative to therapeutically loaded materials designed as oral cavity lining materials in prosthodontics. Materials and Methods: Silicone-based liners containing vitamins were prepared by mixing them in solution and becoming crosslinked, and then they were characterized using Fourier-transform infrared (FT-IR) spectroscopy to confirm the incorporation of the vitamins into the silicone network; scanning electron microscopy (SEM) to evidence the morphology of the liner materials; dynamic vapor sorption (DVS) to evaluate their internal hydrophobicity, swelling in environments similar to biological fluids and mechanical test to demonstrate tensile strength; MTT to confirm their biocompatibility on normal cell cultures (fibroblast) and mucoadhesivity; and histopathological tests on porcine oral mucosa to highlight their potential utility as soft lining materials with improved efficiency. Results: FT-IR analysis confirmed the structural peculiarities of the prepared lining materials and the successful incorporation of vitamins into the silicone matrix. The surface roughness of the materials was lower than 0.2 μm, while in cross-section, the lining materials showed a compact morphology. It was found that the presence of vitamins induced a decrease in the main mechanical parameters (strength and elongation at break, Young's modulus) and hydrophobicity, which varied from one vitamin to another. A swelling degree higher than 8% was found in PBS 6.8 (artificial saliva) and water. Hydrolytic stability studies in an artificial saliva medium showed the release of low concentrations of silicone and vitamin fragments in the first 24 h, which increased the swelling behavior of the materials, diffusion and solubility of the vitamins. The microscopic images of fibroblast cells incubated with vitamin liners revealed very good biocompatibility. Also, the silicone liners incorporating the vitamins showed good mucoadhesive properties. The appearance of some pathological disorders with autolysis processes was more pronounced in the case of vitamin A liners. Conclusions: The addition of the vitamins was shown to have a beneficial effect that was mainly manifested as increased biocompatibility, hydrolytic stability and mucoadhesiveness with the mucosa of the oral cavity and less of an effect on the mechanical strength. The obtained lining materials showed good resistance in simulated biological media but caused a pronounced autolysis phenomenon, as revealed by histopathological examination, showing that these materials may have broad implications in the treatment of oral diseases.
Collapse
Affiliation(s)
- Irina Gradinaru
- Department of Implantology, Removable Dentures, Technology, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Bianca Iulia Ciubotaru
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania; (B.I.C.); (M.D.); (A.B.); (M.C.)
| | - Maria Butnaru
- Biomedical Sciences Department, Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy, 9-13 Kogalniceanu Street, 700454 Iasi, Romania; (M.B.); (F.D.C.)
| | - Florina Daniela Cojocaru
- Biomedical Sciences Department, Faculty of Medical Bioengineering, “Grigore T. Popa” University of Medicine and Pharmacy, 9-13 Kogalniceanu Street, 700454 Iasi, Romania; (M.B.); (F.D.C.)
| | - Costică Toader Covașă
- Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” University of Life Sciences—IULS, Aleea Mihail Sadoveanu nr. 3, 700490 Iasi, Romania;
| | - Teofana Bibire
- Faculty of General Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Mihaela Dascalu
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania; (B.I.C.); (M.D.); (A.B.); (M.C.)
| | - Alexandra Bargan
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania; (B.I.C.); (M.D.); (A.B.); (M.C.)
| | - Maria Cazacu
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania; (B.I.C.); (M.D.); (A.B.); (M.C.)
| | - Mirela-Fernanda Zaltariov
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41 A, 700487 Iasi, Romania; (B.I.C.); (M.D.); (A.B.); (M.C.)
| |
Collapse
|
8
|
Gradinaru I, Vasiliu AL, Bargan A, Checherita LE, Ciubotaru BI, Armencia AO, Istrate B, Dascalu CG, Antohe ME. The Influence of Beverages on Resin Composites: An In Vitro Study. Biomedicines 2023; 11:2571. [PMID: 37761013 PMCID: PMC10526112 DOI: 10.3390/biomedicines11092571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 09/11/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Dental composites, through their structural diversity, represent the biomaterials frequently used in dental reconstructive therapy. The aim of our study was to observe the influence of different beverage environment conditions on seven types of obturation dental materials with different compositions. Our research focused on the surface modification analysis of the materials after the immersion in the different beverages; in this regard, we used the EDAX technique correlated with the energy-dispersive X-ray fluorescence (XRF). The pH of the drinks and that of the simulated saliva solution were determined by the titrimetric method, a sodium hydroxide solution 0.1 mol/dm3 was prepared and used for the titration. An amount of 5 mL of each analyzed solution was added to 15 mL of distilled water to obtain a dilution, to which 3 drops of phenolphthalein (as a color indicator-Phenolphthalein, 3,3-Bis(4-hydroxyphenyl)-1(3H)-isobenzofuranone, C20H14O4 Mw: 318.32, purchased from Merck) were added for each analysis. For each solution, the experiment was repeated three times in order to obtain accurate results. The results of our study materialized into a real plea for modifying the patients' behavior in terms of diet and preferences for acidic drinks, so that their quality-of-life valence can be improved by keeping the composite materials in a long-term unalterable state on the one hand; on the other hand, systemic damage can be prevented as well.
Collapse
Affiliation(s)
- Irina Gradinaru
- 3rd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (I.G.); (M.E.A.)
| | - Ana Lavinia Vasiliu
- Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania; (A.L.V.); (A.B.)
| | - Alexandra Bargan
- Department of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania; (A.L.V.); (A.B.)
| | - Laura Elisabeta Checherita
- 2nd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania;
| | - Bianca-Iulia Ciubotaru
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Grigore Ghica-Vodă, 41A, 700487 Iasi, Romania;
| | - Adina Oana Armencia
- 1st Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universității Street, 700115 Iasi, Romania
| | - Bogdan Istrate
- Department of Mechanical, Mechatronic and Robotic Engineering, The Faculty of Mechanics, “Gheorghe Asachi” Technical University, Bulevardul Profesor Dimitrie Mangeron 67, 700050 Iasi, Romania;
| | - Cristina Gena Dascalu
- Department of Medical Informatics, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universității Street, 700115 Iasi, Romania
| | - Magda Ecaterina Antohe
- 3rd Dental Medicine Department, Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 700115 Iasi, Romania; (I.G.); (M.E.A.)
| |
Collapse
|
9
|
Serbezeanu D, Iftime MM, Ailiesei GL, Ipate AM, Bargan A, Vlad-Bubulac T, Rîmbu CM. Evaluation of Poly(vinyl alcohol)-Xanthan Gum Hydrogels Loaded with Neomycin Sulfate as Systems for Drug Delivery. Gels 2023; 9:655. [PMID: 37623110 PMCID: PMC10454009 DOI: 10.3390/gels9080655] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/28/2023] [Accepted: 08/10/2023] [Indexed: 08/26/2023] Open
Abstract
In recent years, multidrug-resistant bacteria have developed the ability to resist multiple antibiotics, limiting the available options for effective treatment. Raising awareness and providing education on the appropriate use of antibiotics, as well as improving infection control measures in healthcare facilities, are crucial steps to address the healthcare crisis. Further, innovative approaches must be adopted to develop novel drug delivery systems using polymeric matrices as carriers and support to efficiently combat such multidrug-resistant bacteria and thus promote wound healing. In this context, the current work describes the use of two biocompatible and non-toxic polymers, poly(vinyl alcohol) (PVA) and xanthan gum (XG), to achieve hydrogel networks through cross-linking by oxalic acid following the freezing/thawing procedure. PVA/XG-80/20 hydrogels were loaded with different quantities of neomycin sulfate to create promising low-class topical antibacterial formulations with enhanced antimicrobial effects. The inclusion of neomycin sulfate in the hydrogels is intended to impart them with powerful antimicrobial properties, thereby facilitating the development of exceptionally efficient topical antibacterial formulations. Thus, incorporating higher quantities of neomycin sulfate in the PVA/XG-80/20-2 and PVA/XG-80/20-3 formulations yielded promising cycling characteristics. These formulations exhibited outstanding removal efficiency, exceeding 80% even after five cycles, indicating remarkable and consistent adsorption performance with repeated use. Furthermore, both PVA/XG-80/20-2 and PVA/XG-80/20-3 formulations outperformed the drug-free sample, PVA/XG-80/20, demonstrating a significant enhancement in maximum compressive stress.
Collapse
Affiliation(s)
- Diana Serbezeanu
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Manuela Maria Iftime
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Gabriela-Liliana Ailiesei
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Alina-Mirela Ipate
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Alexandra Bargan
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Tǎchiţǎ Vlad-Bubulac
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (M.M.I.); (G.-L.A.); (A.-M.I.); (A.B.); (T.V.-B.)
| | - Cristina Mihaela Rîmbu
- Department of Public Health, “Ion Ionescu de la Brad” Iasi University of Life Sciences, 8 Sadoveanu Alley, 707027 Iasi, Romania;
| |
Collapse
|
10
|
Resmerita AM, Bargan A, Cojocaru C, Farcas A. Synthesis, Properties and Adsorption Kinetic Study of New Cross-Linked Composite Materials Based on Polyethylene Glycol Polyrotaxane and Polyisoprene/Semi-Rotaxane. Materials (Basel) 2023; 16:5594. [PMID: 37629885 PMCID: PMC10456596 DOI: 10.3390/ma16165594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/08/2023] [Accepted: 08/10/2023] [Indexed: 08/27/2023]
Abstract
New composite materials were prepared via cross-linking of polyethylene glycol/2-hydroxypropyl-β-cyclodextrins polyrotaxane (PEG/HPβCD) and polyisoprene/HPβCD semi-polyrotaxane (PI/HPβCD SR) with 1,6-hexamethylene diizocyanate (HMDI). Advanced instrumental methods (such WAXS (wide angle X-ray scattering), AFM (atomic force microscopy), SEM (scanning electron microscopy), and thermal and dynamic vapor sorption) were employed for the structural, morphological and thermal characterization of the resulting composite materials. The roughness parameters calculated using AFM indicate a smoother surface for the composite material with 10 wt% of PI/HPβCD SR, denoting that a homogeneous film was obtained. SEM analysis reveals porous morphologies for both composite materials and the pore sizes increase with the increasing concentration of PI/HPβCD SR in the matrix. Dynamic vapor sorption/desorption measurements and type IV isotherms confirmed the hydrophilic and porous materials, which are in agreement with SEM analysis. The composite with a higher PI/HPβCD SR concentration in the matrix showed increased thermal stability than that of the pure cross-linked material. This material was further tested as a sorbent for methylene blue (MB) dye removal from an aqueous solution. The adsorption capacity of the composite film was found to be 2.58 mg g-1 at 25 °C.
Collapse
Affiliation(s)
- Ana-Maria Resmerita
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (C.C.)
| | | | | | - Aurica Farcas
- “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (C.C.)
| |
Collapse
|
11
|
Dobos AM, Bargan A, Dunca S, Rîmbu CM, Filimon A. Cellulose acetate/silica composites: Physicochemical and biological characterization. J Mech Behav Biomed Mater 2023; 144:106002. [PMID: 37402341 DOI: 10.1016/j.jmbbm.2023.106002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 06/27/2023] [Accepted: 06/28/2023] [Indexed: 07/06/2023]
Abstract
Cellulose acetate is of remarkable scientific interest, becoming more useful when is used in obtaining of the composite materials containing nanoparticles, as result of its improved properties. Thus, cellulose acetate/silica composite films obtained by casting the solutions of cellulose acetate (CA)/tetraethyl orthosilicate (TEOS) in different mixing ratios were analyzed in this paper. The impact of TEOS addition, and implicitly of the silica nanoparticles on the mechanical strength, water vapor sorption properties and antimicrobial activity of the cellulose acetate/silica films were mainly monitored. The results of the tensile strength tests were discussed in correlation with data obtained from Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis. It was found that samples with low TEOS content show improved mechanical strength compared to samples with high amounts of TEOS. The microstructural characteristics of the studied films affect their moisture sorption capacity so that the weight of the adsorbed water increases with the addition of TEOS. These features are complemented with the antimicrobial activity against Staphylococcus aureus and Escherichia coli bacterial species. The obtained data show that the cellulose acetate/silica films, and especially those with low silica content have improved properties that can recommend them for applications in the biomedical field.
Collapse
Affiliation(s)
- Adina Maria Dobos
- "Petru Poni" Institute of Macromolecular Chemistry, Polycondensation and Thermostable Polymers Department, Grigore Ghica Voda Alley No. 41A, 700487, Iasi, Romania.
| | - Alexandra Bargan
- "Petru Poni" Institute of Macromolecular Chemistry, Inorganic Polymers Department, Grigore Ghica Voda Alley No. 41A, 700487, Iasi, Romania
| | - Simona Dunca
- "Alexandru Ioan Cuza" University of Iasi, Faculty of Biology, Microbiology Department, 11 Carol I Bvd., 700506, Iasi, Romania
| | - Cristina Mihaela Rîmbu
- "Ion Ionescu de la Brad" University of Life Science", Department of Public Health, 8 Mihail Sadoveanu Alley, 707027, Iasi, Romania
| | - Anca Filimon
- "Petru Poni" Institute of Macromolecular Chemistry, Polycondensation and Thermostable Polymers Department, Grigore Ghica Voda Alley No. 41A, 700487, Iasi, Romania
| |
Collapse
|
12
|
Filimon A, Onofrei MD, Bargan A, Stoica I, Dunca S. Bioactive Materials Based on Hydroxypropyl Methylcellulose and Silver Nanoparticles: Structural-Morphological Characterization and Antimicrobial Testing. Polymers (Basel) 2023; 15:polym15071625. [PMID: 37050239 PMCID: PMC10096613 DOI: 10.3390/polym15071625] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/18/2023] [Accepted: 03/22/2023] [Indexed: 04/14/2023] Open
Abstract
The progress achieved in recent years in the biomedical field justifies the objective evaluation of new techniques and materials obtained by using silver in different forms as metallic silver, silver salts, and nanoparticles. Thus, the antibacterial, antiviral, antifungal, antioxidant, and anti-inflammatory activity of silver nanoparticles (AgNPs) confers to newly obtained materials characteristics that make them ideal candidates in a wide spectrum of applications. In the present study, the use of hydroxypropyl methyl cellulose (HPMC) in the new formulation, by embedding AgNPs with antibacterial activity, using poly(N-vinylpyrrolidone) (PVP) as a stabilizing agent was investigated. AgNPs were incorporated in HPMC solutions, by thermal reduction of silver ions to silver nanoparticles, using PVP as a stabilizer; a technique that ensures the efficiency and selectivity of the obtained materials. The rheological properties, morphology, in vitro antimicrobial activity, and stability/catching of Ag nanoparticles in resulting HPMC/PVP-AgNPs materials were evaluated. The obtained rheological parameters highlight the multifunctional roles of PVP, focusing on the stabilizing effect of new formulations but also the optimization of some properties of the studied materials. The silver amount was quantified using the spectroscopy techniques (energy-dispersive X-ray fluorescence (XRF), energy-dispersive X-ray spectroscopy (EDX)), while formation of the AgNPs was confirmed using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), and dynamic light scattering (DLS). Also, the morphological examination (Atomic Force Microscopy (AFM) and Scanning electron microscopy (SEM)) by means of the texture roughness parameters has evidenced favorable characteristics for targeted applications. Antibacterial activity was tested against Escherichia coli and Staphylococcus aureus and was found to be substantially improved was silver was added in the studied systems.
Collapse
Affiliation(s)
- Anca Filimon
- Polycondensation and Thermostable Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Mihaela Dorina Onofrei
- Polycondensation and Thermostable Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Alexandra Bargan
- Inorganic Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Iuliana Stoica
- Atomic Force Microscopy Laboratory, Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley 41A, 700487 Iasi, Romania
| | - Simona Dunca
- Department of Microbiology, Biology Faculty, "Alexandru Ioan Cuza" University of Iasi, 11 Carol I Bvd., 700506 Iasi, Romania
| |
Collapse
|
13
|
Cojocaru C, Pascariu P, Enache AC, Bargan A, Samoila P. Application of Surface-Modified Nanoclay in a Hybrid Adsorption-Ultrafiltration Process for Enhanced Nitrite Ions Removal: Chemometric Approach vs. Machine Learning. Nanomaterials (Basel) 2023; 13:697. [PMID: 36839065 PMCID: PMC9963183 DOI: 10.3390/nano13040697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
Herein, we report the results of a study on combining adsorption and ultrafiltration in a single-stage process to remove nitrite ions from contaminated water. As adsorbent, a surface-modified nanoclay was employed (i.e., Nanomer® I.28E, containing 25-30 wt. % trimethyl stearyl ammonium). Ultrafiltration experiments were conducted using porous polymeric membranes (Ultracel® 10 kDa). The hybrid process of adsorption-ultrafiltration was modeled and optimized using three computational tools: (1) response surface methodology (RSM), (2) artificial neural network (ANN), and (3) support vector machine (SVM). The optimal conditions provided by machine learning (SVM) were found to be the best, revealing a rejection efficiency of 86.3% and an initial flux of permeate of 185 LMH for a moderate dose of the nanoclay (0.674% w/v). Likewise, a new and more retentive membrane (based on PVDF-HFP copolymer and halloysite (HS) inorganic nanotubes) was produced by the phase-inversion method, characterized by SEM, EDX, AFM, and FTIR techniques, and then tested under optimal conditions. This new composite membrane (PVDF-HFP/HS) with a thickness of 112 μm and a porosity of 75.32% unveiled an enhanced rejection efficiency (95.0%) and a lower initial flux of permeate (28 LMH). Moreover, molecular docking simulations disclosed the intermolecular interactions between nitrite ions and the functional moiety of the organonanoclay.
Collapse
Affiliation(s)
- Corneliu Cojocaru
- Laboratory of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Petronela Pascariu
- Laboratory of Physical Chemistry of Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Andra-Cristina Enache
- Laboratory of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Bargan
- Laboratory of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Petrisor Samoila
- Laboratory of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| |
Collapse
|
14
|
Zaltariov MF, Turtoi M, Peptanariu D, Macsim AM, Clima L, Cojocaru C, Vornicu N, Ciubotaru BI, Bargan A, Calin M, Cazacu M. Chemical Attachment of 5-Nitrosalicylaldimine Motif to Silatrane Resulting in an Organic-Inorganic Structure with High Medicinal Significance. Pharmaceutics 2022; 14:2838. [PMID: 36559331 PMCID: PMC9781643 DOI: 10.3390/pharmaceutics14122838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Two chemical motifs of interest for medicinal chemistry, silatrane as 1-(3-aminopropyl) silatrane (SIL M), and nitro group attached in position 5 to salicylaldehyde, are coupled in a new structure, 1-(3-{[(2-hydroxy-5-nitrophenyl)methylidene]amino}propyl)silatrane (SIL-BS), through an azomethine moiety, also known as a versatile pharmacophore. The high purity isolated compound was structurally characterized by an elemental, spectral, and single crystal X-ray diffraction analysis. Given the structural premises for being a biologically active compound, different specific techniques and protocols have been used to evaluate their in vitro hydrolytic stability in simulated physiological conditions, the cytotoxicity on two cancer cell lines (HepG2 and MCF7), and protein binding ability-with a major role in drug ADME (Absorption, Distribution, Metabolism and Excretion), in parallel with those of the SIL M. While the latter had a good biocompatibility, the nitro-silatrane derivative, SIL-BS, exhibited a higher cytotoxic activity on HepG2 and MCF7 cell lines, performance assigned, among others, to the known capacity of the nitro group to promote a specific cytotoxicity by a "activation by reduction" mechanism. Both compounds exhibited increased bio- and muco-adhesiveness, which can favor an optimized therapeutic effect by increased drug permeation and residence time in tumor location. Additional benefits of these compounds have been demonstrated by their antimicrobial activity on several fungi and bacteria species. Molecular docking computations on Human Serum Albumin (HSA) and MPRO COVID-19 protease demonstrated their potential in the development of new drugs for combined therapy.
Collapse
Affiliation(s)
- Mirela-Fernanda Zaltariov
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Mihaela Turtoi
- Medical and Pharmaceutical Bionanotechnologies Laboratory, Institute of Cellular Biology and Pathology “Nicolae Simionescu” of the Romanian Academy, B.P. Hasdeu 8, 050568 Bucharest, Romania
| | - Dragos Peptanariu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Ana-Maria Macsim
- NMR Laboratory, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Lilia Clima
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Corneliu Cojocaru
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Nicoleta Vornicu
- Metropolitan Center of Research T.A.B.O.R, The Metropolitanate of Moldavia and Bukovina, 700066 Iasi, Romania
| | - Bianca-Iulia Ciubotaru
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Alexandra Bargan
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Manuela Calin
- Medical and Pharmaceutical Bionanotechnologies Laboratory, Institute of Cellular Biology and Pathology “Nicolae Simionescu” of the Romanian Academy, B.P. Hasdeu 8, 050568 Bucharest, Romania
| | - Maria Cazacu
- Inorganic Polymers Department, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| |
Collapse
|
15
|
Serbezeanu D, Hamciuc C, Vlad-Bubulac T, Onofrei MD, Bargan A, Rusu D, Suflet DM, Lisa G. Electrospun Nanofibers Based on Polymer Blends with Tunable High-Performance Properties for Innovative Fire-Resistant Materials. Polymers (Basel) 2022; 14:polym14245501. [PMID: 36559867 PMCID: PMC9785993 DOI: 10.3390/polym14245501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
The main concern of materials designed for firefighting protective clothing applications is heat protection, which can be experienced from any uncomfortably hot objects or inner spaces, as well as direct contact with flame. While textile fibers are one of the most important components of clothing, there is a constant need for the development of innovative fire-retardant textile fibers with improved thermal characteristics. Lately, inherently fire-resistant fibers have become very popular to provide better protection for firefighters. In the current study, the electrospinning technique was applied as a versatile method to produce micro-/nano-scaled non-woven fibrous membranes based on various ratios of a poly(ether-ether-ketone) (PEEK) and a phosphorus-containing polyimide. Rheological measurements have been performed on solutions of certain ratios of these components in order to optimize the electrospinning process. FTIR spectroscopy and scanning electron microscopy were used to investigate the chemical structure and morphology of electrospun nanofiber membranes, while thermogravimetric analysis, heat transfer measurements and differential scanning calorimetry were used to determine their thermal properties. The water vapor sorption behavior and mechanical properties of the optimized electrospun nanofiber membranes were also evaluated.
Collapse
Affiliation(s)
- Diana Serbezeanu
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
- Correspondence: (D.S.); (C.H.)
| | - Corneliu Hamciuc
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
- Correspondence: (D.S.); (C.H.)
| | - Tăchiță Vlad-Bubulac
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
| | - Mihaela-Dorina Onofrei
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
| | - Alexandra Bargan
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
| | - Daniela Rusu
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
| | - Dana Mihaela Suflet
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda, 41A, 700487 Iasi, Romania
| | - Gabriela Lisa
- Department of Chemical Engineering, Faculty of Chemical Engineering and Environmental Protection, Gheorghe Asachi Technical University of Iasi, Bd. Mangeron 73, 700050 Iasi, Romania
| |
Collapse
|
16
|
Stelescu MD, Airinei A, Bargan A, Fifere N, Georgescu M, Sonmez M, Nituica M, Alexandrescu L, Stefan A. Mechanical Properties and Equilibrium Swelling Characteristics of Some Polymer Composites Based on Ethylene Propylene Diene Terpolymer (EPDM) Reinforced with Hemp Fibers. Materials (Basel) 2022; 15:6838. [PMID: 36234179 PMCID: PMC9571222 DOI: 10.3390/ma15196838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/22/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
EPDM/hemp fiber composites with fiber loading of 0-20 phr were prepared by the blending technique on a laboratory electrically heated roller mill. Test specimens were obtained by vulcanization using a laboratory hydraulic press. The elastomer crosslinking and the chemical modification of the hemp fiber surface were achieved by a radical reaction mechanism initiated by di(tert-butylperoxyisopropyl)benzene. The influence of the fiber loading on the mechanical properties, gel fraction, swelling ratio and crosslink degree was investigated. The gel fraction, crosslink density and rubber-hemp fiber interaction were evaluated based on equilibrium solvent-swelling measurements using the Flory-Rehner relation and Kraus and Lorenz-Park equations. The morphology of the EPDM/hemp fiber composites was analyzed by scanning electron microscopy. The water absorption increases as the hemp fiber loading increases.
Collapse
Affiliation(s)
- Maria Daniela Stelescu
- National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Anton Airinei
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Alexandra Bargan
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Nicusor Fifere
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Mihai Georgescu
- National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Maria Sonmez
- National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Mihaela Nituica
- National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Laurentia Alexandrescu
- National Research and Development Institute for Textile and Leather, Leather and Footwear Institute, 93 Ion Minulescu Street, 031215 Bucharest, Romania
| | - Adriana Stefan
- National Institute of Aerospace Research “Elie Carafoli”, 220 Iuliu Maniu Blv., 061126 Bucharest, Romania
| |
Collapse
|
17
|
Filip D, Macocinschi D, Zaltariov MF, Ciubotaru BI, Bargan A, Varganici CD, Vasiliu AL, Peptanariu D, Balan-Porcarasu M, Timofte-Zorila MM. Hydroxypropyl Cellulose/Pluronic-Based Composite Hydrogels as Biodegradable Mucoadhesive Scaffolds for Tissue Engineering. Gels 2022; 8:gels8080519. [PMID: 36005120 PMCID: PMC9407387 DOI: 10.3390/gels8080519] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/12/2022] [Accepted: 08/16/2022] [Indexed: 11/16/2022] Open
Abstract
Recently, the development of new materials with the desired characteristics for functional tissue engineering, ensuring tissue architecture and supporting cellular growth, has gained significant attention. Hydrogels, which possess similar properties to natural cellular matrixes, being able to repair or replace biological tissues and support the healing process through cellular proliferation and viability, are a challenge when designing tissue scaffolds. This paper provides new insights into hydrogel-based polymeric blends (hydroxypropyl cellulose/Pluronic F68), aiming to evaluate the contributions of both components in the development of new tissue scaffolds. In order to study the interactions within the hydrogel blends, FTIR and 1HNMR spectroscopies were used. The porosity and the behavior in moisture medium were highlighted by SEM and DVS analyses. The biodegradability of the hydrogel blends was studied in a simulated biological medium. The hydrogel composition was determinant for the scaffold behavior: the HPC component was found to have a great influence on the BET and GAB areas, on the monolayer values estimated from sorption-desorption isotherms and on mucoadhesivity on small intestine mucosa, while the Pluronic F68 component improved the thermal stability. All blends were also found to have good mechanical strength and increased biocompatibility on the NHDF cell line. Based on their particular compositions and increased mucoadhesivity on small intestine mucosa, these polymeric blends could be effective in the repair or recovery of damaged cell membranes (due to the contribution of Pluronic F68) or in control drug-delivery intestinal formulations.
Collapse
Affiliation(s)
- Daniela Filip
- Laboratory of Physical Chemistry of Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Doina Macocinschi
- Laboratory of Physical Chemistry of Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Mirela-Fernanda Zaltariov
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
- Correspondence:
| | - Bianca-Iulia Ciubotaru
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Alexandra Bargan
- Department of Inorganic Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Cristian-Dragos Varganici
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Ana-Lavinia Vasiliu
- Laboratory of Functional Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Dragos Peptanariu
- Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Mihaela Balan-Porcarasu
- Laboratory of Polycondensation and Thermostable Polymers, “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania
| | - Mihaela-Madalina Timofte-Zorila
- Saint Spiridon County Hospital, Bulevardul Independentei 1, “Gr. T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania
| |
Collapse
|
18
|
Filip D, Macocinschi D, Zaltariov MF, Gafitanu CA, Tuchilus CG, Bele A, Ciubotaru BI, Stoleru E, Bargan A. Mucoadhesive and Antimicrobial Allantoin/β Cyclodextrins-Loaded Carbopol Gels as Scaffolds for Regenerative Medicine. Gels 2022; 8:gels8070416. [PMID: 35877501 PMCID: PMC9320337 DOI: 10.3390/gels8070416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/24/2022] [Accepted: 06/30/2022] [Indexed: 02/04/2023] Open
Abstract
Allantoin and its β-cyclodextrin and hydroxypropyl-β-cyclodextrin inclusion complexes 1:1 have been used to prepare carbopol-based mucoadhesive gels. The gelation process occurred by adjustment with glycerol 10% in the presence of triethanolamine. The structural features induced by the presence of allantoin and the corresponding β-cyclodextrins inclusion complexes have been first investigated by infrared spectroscopy highlighting strong interactions within the gels network and ideal crosslinks for the self-healing behavior. The hydrophilicity of the gels was investigated by the determination of the surface tension parameters and the free energy of hydration. The interfacial free energy values indicated prolonged biocompatibility with blood. The gels-water molecule interactions in terms of sorption, permeability, and diffusion coefficients were evaluated by dynamic vapor sorption analysis. The self-assembly process through intermolecular H-bonding, the high hydrophilicity, the mechanical performance, the hydrolytic stability in simulated biological media, the biocompatibility with normal human dermal fibroblast (NHDF) cells, the mucoadhesivity and antimicrobial activity on selected microorganism species (S. Aureus and C. albicans) of the allantoin-based gels recommend them as promising scaffold alternatives in regenerative medicine.
Collapse
Affiliation(s)
- Daniela Filip
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Doina Macocinschi
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
- Correspondence: (D.M.); (M.-F.Z.)
| | - Mirela-Fernanda Zaltariov
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
- Correspondence: (D.M.); (M.-F.Z.)
| | - Carmen Anatolia Gafitanu
- Department of Pharmaceutical Technology, Faculty of Pharmacy, “Gr. T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Cristina Gabriela Tuchilus
- “Microbiology Department, Faculty of Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, 16 Universitatii Street, 700115 Iasi, Romania;
| | - Adrian Bele
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Bianca-Iulia Ciubotaru
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Elena Stoleru
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| | - Alexandra Bargan
- “Petru Poni” Institute of Macromolecular Chemistry, Aleea Gr. Ghica Voda 41 A, 700487 Iasi, Romania; (D.F.); (A.B.); (B.-I.C.); (E.S.); (A.B.)
| |
Collapse
|
19
|
Dascalu M, Stoica AC, Bele A, Macsim AM, Bargan A, Varganici CD, Stiubianu GT, Racles C, Shova S, Cazacu M. Octakis(Carboxyalkyl-Thioethyl)Silsesquioxanes and Derived Metal Complexes: Synthesis, Characterization and Catalytic Activity Assessments. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02408-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
20
|
Nica SL, Zaltariov MF, Pamfil D, Bargan A, Rusu D, Raţă DM, Găină C, Atanase LI. MWCNTs Composites-Based on New Chemically Modified Polysulfone Matrix for Biomedical Applications. Nanomaterials 2022; 12:nano12091502. [PMID: 35564211 PMCID: PMC9101761 DOI: 10.3390/nano12091502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/21/2022] [Accepted: 04/21/2022] [Indexed: 01/27/2023]
Abstract
Polyvinyl alcohol (PVA) is a non-toxic biosynthetic polymer. Due to the hydrophilic properties of the PVA, its utilization is an easy tool to modify the properties of materials inducing increased hydrophilicity, which can be noticed in the surface properties of the materials, such as wettability. Based on this motivation, we proposed to obtain high-performance composite materials by a facile synthetic method that involves the cross-linking process of polyvinyl alcohol (PVA) with and aldehyde-functionalized polysulfone(mPSF) precursor, prior to incorporation of modified MWCNTs with hydrophilic groups, thus ensuring a high compatibility between the polymeric and the filler components. Materials prepared in this way have been compared with those based on polyvinyl alcohol and same fillers (mMWCNTs) in order to establish the influence of the polymeric matrix on the composites properties. The amount of mMWCNTs varied in both polymeric matrices between 0.5 and 5 wt%. Fourier transformed infrared with attenuated total reflectance spectroscopy (FTIR-ATR) was employed to confirm the changes noted in the PVA, mPSF and their composites. Hemolysis degree was investigated in correlation with the material structural features. Homogenous distribution of mMWCNTs in all the composite materials has been confirmed by scanning electron microscopy. The hydrophilicity of both composite systems, estimated by the contact angle method, was influenced by the presence of the filler amount mMWCNTs in both matrices (PVA and mPSF). Our work demonstrates that mPSF/mMWCNTs and PVA/mMWCNTs composite could be used as water purification or blood-filtration materials.
Collapse
Affiliation(s)
- Simona Luminita Nica
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
- Correspondence: (S.L.N.); (L.I.A.)
| | - Mirela-Fernanda Zaltariov
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
| | - Daniela Pamfil
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
| | - Alexandra Bargan
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
| | - Daniela Rusu
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
| | - Delia Mihaela Raţă
- Faculty of Medical Dentistry, Apollonia University of Iasi, Pacurari Street, No. 11, 700511 Iasi, Romania;
| | - Constantin Găină
- Petru Poni Institute of Macromolecular Chemistry, 41A Grigore GhicaVoda Alley, 700487 Iasi, Romania; (M.-F.Z.); (D.P.); (A.B.); (D.R.); (C.G.)
| | - Leonard Ionut Atanase
- Faculty of Medical Dentistry, Apollonia University of Iasi, Pacurari Street, No. 11, 700511 Iasi, Romania;
- Correspondence: (S.L.N.); (L.I.A.)
| |
Collapse
|
21
|
Serbezeanu D, Bargan A, Homocianu M, Aflori M, Rîmbu CM, Enache AA, Vlad-Bubulac T. Electrospun Polyvinyl Alcohol Loaded with Phytotherapeutic Agents for Wound Healing Applications. Nanomaterials (Basel) 2021; 11:nano11123336. [PMID: 34947686 PMCID: PMC8705401 DOI: 10.3390/nano11123336] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/04/2021] [Accepted: 12/05/2021] [Indexed: 12/28/2022]
Abstract
In this paper, hydroalcoholic solutions of Thymus vulgaris, Salvia officinalis folium, and Hyperici herba were used in combination with poly (vinyl alcohol) with the aim of developing novel poly (vinyl alcohol)-based nanofiber mats loaded with phytotherapeutic agents via the electrospinning technique. The chemical structure and morphology of the polymeric nanofibers were investigated using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The addition of Thymus vulgaris, Salvia officinalis folium, and Hyperici herba extracts to the pure polyvinyl alcohol fibers led to changes in the morphology of the fibers and a reduction in the fibers’ diameter, from 0.1798 µm in the case of pure polyvinyl alcohol to 0.1672, 0.1425, and 0.1369 µm in the case of polyvinyl alcohol loaded with Thymus vulgaris, Salvia officinalis folium, and Hyperici herba, respectively. The adapted Folin–Ciocalteu (FC) method, which was used to determine the total phenolic contents, revealed that the samples of PVA–Hyperici herba and PVA–Thymus vulgaris had the highest phenol contents, at 13.25 μgGAE/mL and 12.66 μgGAE/mL, respectively. Dynamic water vapor measurements were used in order to investigate the moisture sorption and desorption behavior of the developed electrospun materials. The antimicrobial behavior of these products was also evaluated. Disk diffusion assay studies with Escherichia coli, Staphylococcus aureus, and Methicillin-resistant Staphylococcus aureus were conducted on the developed nanofibers in order to quantify their phytotherapeutic potential.
Collapse
Affiliation(s)
- Diana Serbezeanu
- “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (M.H.); (M.A.); (T.V.-B.)
- Correspondence:
| | - Alexandra Bargan
- “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (M.H.); (M.A.); (T.V.-B.)
| | - Mihaela Homocianu
- “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (M.H.); (M.A.); (T.V.-B.)
| | - Magdalena Aflori
- “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (M.H.); (M.A.); (T.V.-B.)
| | - Cristina Mihaela Rîmbu
- Department of Public Health, Faculty of Veterinary Medicine “Ion Ionescu de la Brad”, University of Agricultural Sciences and Veterinary Medicine, 8, Mihail Sadoveanu Alley, 707027 Iasi, Romania;
| | | | - Tăchiță Vlad-Bubulac
- “Petru Poni” Institute of Macromolecular Chemistry, 41A, Grigore Ghica Voda Alley, 700487 Iasi, Romania; (A.B.); (M.H.); (M.A.); (T.V.-B.)
| |
Collapse
|
22
|
Cazacu M, Racles C, Zaltariov MF, Dascalu M, Bele A, Tugui C, Bargan A, Stiubianu G. From Amorphous Silicones to Si-Containing Highly Ordered Polymers: Some Romanian Contributions in the Field. Polymers (Basel) 2021; 13:polym13101605. [PMID: 34065717 PMCID: PMC8157024 DOI: 10.3390/polym13101605] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 05/12/2021] [Accepted: 05/12/2021] [Indexed: 11/16/2022] Open
Abstract
Polydimethylsiloxane (PDMS), in spite of its well-defined helical structure, is an amorphous fluid even at extremely high molecular weights. The cause of this behavior is the high flexibility of the siloxane backbone and the lack of intermolecular interactions attributed to the presence of methyl groups. These make PDMS incompatible with almost any organic or inorganic component leading to phase separation in siloxane-siloxane copolymers containing blocks with polar organic groups and in siloxane-organic copolymers, where dimethylsiloxane segments co-exist with organic ones. Self-assembly at the micro- or nanometric scale is common in certain mixed structures, including micelles, vesicles, et cetera, manifesting reversibly in response to an external stimulus. Polymers with a very high degree of ordering in the form of high-quality crystals were obtained when siloxane/silane segments co-exist with coordinated metal blocks in the polymer chain. While in the case of coordination of secondary building units (SBUs) with siloxane ligands 1D chains are formed; when coordination is achieved in the presence of a mixture of ligands, siloxane and organic, 2D structures are formed in most cases. The Romanian research group's results regarding these aspects are reviewed: from the synthesis of classic, amorphous silicone products, to their adaptation for use in emerging fields and to new self-assembled or highly ordered structures with properties that create perspectives for the use of silicones in hitherto unexpected areas.
Collapse
Affiliation(s)
- Maria Cazacu
- Correspondence: ; Tel.: +40-232-217-454; Fax: +40-232-211-299
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Dobos AM, Filimon A, Bargan A, Zaltariov MF. New approaches for the development of cellulose acetate/tetraethyl orthosilicate composite membranes: Rheological and microstructural analysis. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113129] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
24
|
Bargan A, Zaltariov MF, Vlad A, Dumitriu AMC, Soroceanu A, Macsim AM, Dascalu M, Varganici CD, Cazacu M, Shova S. Keto-enol tautomerism in new silatranes Schiff bases tailed with different substituted salicylic aldehyde. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
|
25
|
Cazacu M, Turcan‐Trofin G, Vlad A, Bele A, Shova S, Nicolescu A, Bargan A. Hydrophobic, amorphous metal–organic network readily prepared by complexing the aluminum ion with a siloxane spaced dicarboxylic acid in aqueous medium. J Appl Polym Sci 2019. [DOI: 10.1002/app.47144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- M. Cazacu
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - G.‐O. Turcan‐Trofin
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Vlad
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Bele
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - S. Shova
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Nicolescu
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| | - A. Bargan
- Inorganic Polymers Department“Petru Poni” Institute of Macromolecular Chemistry Aleea Gr. Ghica Voda 41A, 700487, Iasi Romania
| |
Collapse
|
26
|
Butnaru E, Stoleru E, Brebu MA, Darie-Nita RN, Bargan A, Vasile C. Chitosan-Based Bionanocomposite Films Prepared by Emulsion Technique for Food Preservation. Materials (Basel) 2019; 12:ma12030373. [PMID: 30691000 PMCID: PMC6384585 DOI: 10.3390/ma12030373] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/21/2019] [Accepted: 01/22/2019] [Indexed: 12/04/2022]
Abstract
Biopolymer nanocomposite films were prepared by casting film-forming emulsions based on chitosan/Tween 80/rosehip seed oil and dispersed montmorillonite nanoclay C30B. The effect of composition on structural, morphological characteristics and, mechanical, barrier, antimicrobial and antioxidant properties was studied. The presence of rosehip seed oil in chitosan films led to the formation of flexible films with improved mechanical, gas and water vapour barrier properties and antioxidant activity. The in vitro antibacterial tests against Escherichia coli, Salmonella typhymurium, and Bacillus cereus showed that the chitosan/rosehip seed oil/montmorillonite nanoclay composites effectively inhibited all the three microorganisms.
Collapse
Affiliation(s)
- Elena Butnaru
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| | - Elena Stoleru
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| | - Mihai Adrian Brebu
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| | - Raluca Nicoleta Darie-Nita
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| | - Alexandra Bargan
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| | - Cornelia Vasile
- Physical Chemistry of Polymers Department, "Petru Poni" Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, RO 700487 Iasi, Romania.
| |
Collapse
|
27
|
Dumitriu AC, Balan M, Bargan A, Shova S, Varganici CD, Cazacu M. Synthesis of functionalized silica nanostructure: Unexpected conversion of cyanopropyl group in chloropropyl one during HCl-catalysed hydrolysis of the corresponding triethoxysilane. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.01.043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
28
|
Soroceanu A, Bargan A, Shova S, Avadanei M, Cazacu M. A supramolecular structure based on copper complex of 2,3-pyridinedicarboxylic acid and 1,3-bis(3-aminopropyl)tetramethyldisiloxane chlorohydrate. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.11.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
29
|
Bargan A, Soroceanu A, Alexandru M, Stoica I, Cazacu M, Shova S. A new zwitterionic siloxane compound: structural characterization, the solution behavior and surface properties evaluation. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|