Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels
The present work investigates, for the first time, the synthesis and properties of some nanocomposite (NC) hydrogels obtained by the aqueous solution free radical polymerization of N-vinylpyrrolidone (NVP) in the presence of Laponite XLG (XLG) as a crosslinker, in comparison with the corresponding h...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/19/4216 |
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| author | Ionela Alice Podaru Paul O. Stănescu Raluca Ginghină Ştefania Stoleriu Bogdan Trică Raluca Şomoghi Mircea Teodorescu |
| author_facet | Ionela Alice Podaru Paul O. Stănescu Raluca Ginghină Ştefania Stoleriu Bogdan Trică Raluca Şomoghi Mircea Teodorescu |
| author_sort | Ionela Alice Podaru |
| collection | DOAJ |
| description | The present work investigates, for the first time, the synthesis and properties of some nanocomposite (NC) hydrogels obtained by the aqueous solution free radical polymerization of N-vinylpyrrolidone (NVP) in the presence of Laponite XLG (XLG) as a crosslinker, in comparison with the corresponding hydrogels prepared by using two conventional crosslinking divinyl monomers: N,N′-methylenebisacrylamide (MBA) and tri(ethylene glycol) divinyl ether (DVE). The structure and properties of the hydrogels were studied by FTIR, TEM, XRD, SEM, swelling and rheological and compressive mechanical measurements. The results showed that DVE and XLG are much better crosslinking agents for the synthesis of PNVP hydrogels than MBA, leading to larger gel fractions and more homogeneous network hydrogels. The hydrogels crosslinked by either DVE or XLG displayed comparable viscoelastic and compressive mechanical properties under the experimental conditions employed. The properties of the XLG-crosslinked hydrogels steadily improved as the clay content increased. The addition of XLG as a second crosslinker together with a divinyl monomer strongly enhanced the material properties in comparison with the hydrogels crosslinked by only one of the crosslinkers involved. The FTIR analyses suggested that the crosslinking of the NC hydrogels was the result of two different interactions occurring between the clay platelets and the PNVP chains. Laponite XLG displayed a uniform distribution within the NC hydrogels, the clay being mostly exfoliated. However, a small number of platelet agglomerations were still present. The PNVP hydrogels described here may find applications for water purification and in the biomedical field as drug delivery systems or wound dressings. |
| first_indexed | 2024-03-09T21:14:35Z |
| format | Article |
| id | doaj.art-0950e77b874a4b34a486069e316e7fb7 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-09T21:14:35Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-0950e77b874a4b34a486069e316e7fb72023-11-23T21:36:16ZengMDPI AGPolymers2073-43602022-10-011419421610.3390/polym14194216Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked HydrogelsIonela Alice Podaru0Paul O. Stănescu1Raluca Ginghină2Ştefania Stoleriu3Bogdan Trică4Raluca Şomoghi5Mircea Teodorescu6Department of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, RomaniaDepartment of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, RomaniaChemical Technologies for CBRN Defense Department, Research and Innovation Center for CBRN Defense and Ecology, 225 Olteniţei Ave., 041327 Bucharest, RomaniaDepartment of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, RomaniaNational Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Spl. Independentei 202, 060021 Bucharest, RomaniaNational Institute for Research and Development in Chemistry and Petrochemistry—ICECHIM, Spl. Independentei 202, 060021 Bucharest, RomaniaDepartment of Bioresources and Polymer Science, Faculty of Chemical Engineering and Biotechnologies, Politehnica University of Bucharest, 1–7 Gh. Polizu Str., 011061 Bucharest, RomaniaThe present work investigates, for the first time, the synthesis and properties of some nanocomposite (NC) hydrogels obtained by the aqueous solution free radical polymerization of N-vinylpyrrolidone (NVP) in the presence of Laponite XLG (XLG) as a crosslinker, in comparison with the corresponding hydrogels prepared by using two conventional crosslinking divinyl monomers: N,N′-methylenebisacrylamide (MBA) and tri(ethylene glycol) divinyl ether (DVE). The structure and properties of the hydrogels were studied by FTIR, TEM, XRD, SEM, swelling and rheological and compressive mechanical measurements. The results showed that DVE and XLG are much better crosslinking agents for the synthesis of PNVP hydrogels than MBA, leading to larger gel fractions and more homogeneous network hydrogels. The hydrogels crosslinked by either DVE or XLG displayed comparable viscoelastic and compressive mechanical properties under the experimental conditions employed. The properties of the XLG-crosslinked hydrogels steadily improved as the clay content increased. The addition of XLG as a second crosslinker together with a divinyl monomer strongly enhanced the material properties in comparison with the hydrogels crosslinked by only one of the crosslinkers involved. The FTIR analyses suggested that the crosslinking of the NC hydrogels was the result of two different interactions occurring between the clay platelets and the PNVP chains. Laponite XLG displayed a uniform distribution within the NC hydrogels, the clay being mostly exfoliated. However, a small number of platelet agglomerations were still present. The PNVP hydrogels described here may find applications for water purification and in the biomedical field as drug delivery systems or wound dressings.https://www.mdpi.com/2073-4360/14/19/4216poly(N-vinylpyrrolidone)nanocomposite hydrogelLaponiteN,N′-methylene-bisacrylamidetri(ethylene glycol) divinyl ether |
| spellingShingle | Ionela Alice Podaru Paul O. Stănescu Raluca Ginghină Ştefania Stoleriu Bogdan Trică Raluca Şomoghi Mircea Teodorescu Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels Polymers poly(N-vinylpyrrolidone) nanocomposite hydrogel Laponite N,N′-methylene-bisacrylamide tri(ethylene glycol) divinyl ether |
| title | Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels |
| title_full | Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels |
| title_fullStr | Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels |
| title_full_unstemmed | Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels |
| title_short | Poly(N-vinylpyrrolidone)–Laponite XLG Nanocomposite Hydrogels: Characterization, Properties and Comparison with Divinyl Monomer-Crosslinked Hydrogels |
| title_sort | poly n vinylpyrrolidone laponite xlg nanocomposite hydrogels characterization properties and comparison with divinyl monomer crosslinked hydrogels |
| topic | poly(N-vinylpyrrolidone) nanocomposite hydrogel Laponite N,N′-methylene-bisacrylamide tri(ethylene glycol) divinyl ether |
| url | https://www.mdpi.com/2073-4360/14/19/4216 |
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