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Davern JW, Hipwood L, Bray LJ, Meinert C, Klein TJ. Addition of Laponite to gelatin methacryloyl bioinks improves the rheological properties and printability to create mechanically tailorable cell culture matrices. APL Bioeng 2024; 8:016101. [PMID: 38204454 PMCID: PMC10776181 DOI: 10.1063/5.0166206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Accepted: 12/12/2023] [Indexed: 01/12/2024] Open
Abstract
Extrusion-based bioprinting has gained widespread popularity in biofabrication due to its ability to assemble cells and biomaterials in precise patterns and form tissue-like constructs. To achieve this, bioinks must have rheological properties suitable for printing while maintaining cytocompatibility. However, many commonly used biomaterials do not meet the rheological requirements and therefore require modification for bioprinting applications. This study demonstrates the incorporation of Laponite-RD (LPN) into gelatin methacryloyl (GelMA) to produce highly customizable bioinks with desired rheological and mechanical properties for extrusion-based bioprinting. Bioink formulations were based on GelMA (5%-15% w/v) and LPN (0%-4% w/v), and a comprehensive rheological design was applied to evaluate key rheological properties necessary for extrusion-based bioprinting. The results showed that GelMA bioinks with LPN (1%-4% w/v) exhibited pronounced shear thinning and viscoelastic behavior, as well as improved thermal stability. Furthermore, a concentration window of 1%-2% (w/v) LPN to 5%-15% GelMA demonstrated enhanced rheological properties and printability required for extrusion-based bioprinting. Construct mechanical properties were highly tunable by varying polymer concentration and photocrosslinking parameters, with Young's moduli ranging from ∼0.2 to 75 kPa. Interestingly, at higher Laponite concentrations, GelMA cross-linking was inhibited, resulting in softer hydrogels. High viability of MCF-7 breast cancer cells was maintained in both free-swelling droplets and printed hydrogels, and metabolically active spheroids formed over 7 days of culture in all conditions. In summary, the addition of 1%-2% (w/v) LPN to gelatin-based bioinks significantly enhanced rheological properties and retained cell viability and proliferation, suggesting its suitability for extrusion-based bioprinting.
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Morariu S, Brunchi CE, Honciuc M, Iftime MM. Development of Hybrid Materials Based on Chitosan, Poly(Ethylene Glycol) and Laponite ® RD: Effect of Clay Concentration. Polymers (Basel) 2023; 15:polym15040841. [PMID: 36850125 PMCID: PMC9959284 DOI: 10.3390/polym15040841] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/03/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
In the context of increasing interest in biomaterials with applicability in cosmetics and medicine, this research aims to obtain and characterize some hybrid materials based on chitosan (CS) (antibacterial, biocompatible, and biodegradable), poly(ethylene glycol) (PEG) (non-toxic and prevents the adsorption of protein and cell) and Laponite® RD (Lap) (bioactive). The rheological properties of the starting dispersions were investigated and discussed related to the interactions developed between components. All samples exhibited gel-like properties, and the storage modulus of CS/PEG dispersion increased from 6.6 Pa to 657.7 Pa by adding 2.5% Lap. Structural and morphological characterization of the films, prepared by solution casting method, was performed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and polarized light microscopy (POM). These analyses proved the incorporation of Lap into CS/PEG films and revealed the morphological changes of the films by the addition of clay. Thereby, at the highest Lap concentration (43.8%), the "house of cards" structure formed by Lap platelets, which incorporate chitosan chains, as evidenced by SEM and POM. Two stages of degradation between 200 °C and 410 °C were evidenced for the films with Lap concentration higher than 38.5%, explained by the existence of a clay-rich phase (given by the clay network) and chitosan-rich one (due to the intercalation of chitosan in the clay network). CS/PEG film with 43.8% Lap showed the highest swelling degree of 240.7%. The analysis of the obtained results led to the conclusion that the addition of clay to the CS/PEG films increases their stability in water and gives them greater thermal stability.
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Nanocomposite hydrogels of gellan gum and polypyrrole for electro-stimulated ibuprofen release application. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Abstract
Tremendous efforts are being made around the world to develop efficient ways to prevent/treat the novel β-coronavirus disease (COVID-19) caused by SARS-CoV-2. There are currently many studies and clinical trials (either based on computational predictions or clinical experiences), in progress, focusing on finding relevant protein targets and medications anti-COVID-19. In the present study, we report a hydrogel drug delivery system based on Laponite® RD (Lap) entrapped in a poly(vinyl alcohol) (PVA) matrix obtained by freezing/thawing method. The PVA/Lap hydrogels were characterized in terms of their morphological, rheological, and swelling properties. Moreover, in vitro drug delivery investigations were performed with a promising drug, Rifampicin (Rif). Rif is an antitubercular drug and was selected for this study in order to demonstrate its efficacy as an anti-COVID-19 repurposed drug. In vitro studies were supplemented by in silico molecular docking simulations of Rif capacity of inhibition against SARS-CoV-2 target protein 3-chymotrypsin-like protease (3CLpro). The results obtained in this study are encouraging and we propose the Rif loaded PVA/Lap hydrogels as promising drug delivery systems for COVID-19 treatment, promoting a synergistic therapeutic effect by dual targeting of viral 3CLpro and S proteins.
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Stojkov G, Niyazov Z, Picchioni F, Bose RK. Relationship between Structure and Rheology of Hydrogels for Various Applications. Gels 2021; 7:255. [PMID: 34940315 PMCID: PMC8700820 DOI: 10.3390/gels7040255] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 11/29/2021] [Accepted: 12/07/2021] [Indexed: 02/01/2023] Open
Abstract
Hydrogels have gained a lot of attention with their widespread use in different industrial applications. The versatility in the synthesis and the nature of the precursor reactants allow for a varying range of hydrogels with different mechanical and rheological properties. Understanding of the rheological behavior and the relationship between the chemical structure and the resulting properties is crucial, and is the focus of this review. Specifically, we include detailed discussion on the correlation between the rheological characteristics of hydrogels and their possible applications. Different rheological tests such as time, temperature and frequency sweep, among others, are described and the results of those tests are reported. The most prevalent applications of hydrogels are also discussed.
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Affiliation(s)
| | | | | | - Ranjita K. Bose
- Department of Chemical Engineering, Product Technology, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands; (G.S.); (Z.N.); (F.P.)
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Selim A, Toth AJ, Fozer D, Süvegh K, Mizsey P. Facile Preparation of a Laponite/PVA Mixed Matrix Membrane for Efficient and Sustainable Pervaporative Dehydration of C1-C3 Alcohols. ACS OMEGA 2020; 5:32373-32385. [PMID: 33376874 PMCID: PMC7758899 DOI: 10.1021/acsomega.0c04380] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 11/18/2020] [Indexed: 06/12/2023]
Abstract
The exfoliation method was applied for the preparation of high-water selective mixed matrix membranes (MMMs), especially for the dehydration of C1-C3 alcohol-water solutions. Herein, a facile and easy method was employed to fabricate physically cross-linked Laponite nanosilicate clay-PVA MMMs without additional cross-linking by a one-step synthesis route for water dehydration from methanol, ethanol, and isopropanol aqueous solutions. The morphologies, chemical structures, thermal stabilities, and surface hydrophilicity of Laponite-PVA MMMs were investigated properly by different characterization techniques. The Laponite concentration has affected the fractional free volume of the membranes, as proven by positron annihilation lifetime spectroscopy analysis. The MMMs displayed both a significant improvement in the separation factor and remarkable enhancement in the permeation fluxes for the three alcohol systems. The influence of the operating temperature on the MMM performance was investigated for the methanol/water solution. The methanol permeability was 100-fold lower than that of the water, indicating that the membranes are more water selective. Particularly, the Laponite-PVA membrane with 5 mg/mL Laponite loading exhibits excellent separation efficiency for C1-C3 dehydration having water permeabilities higher than most other polymeric membranes from the other literature studies of 2.82, 2.08, and 1.56 mg m-1 h-1 kPa-1 for methanol, ethanol, and isopropanol/water systems, respectively. This membrane development allows a more efficient and sustainable separation of aqueous alcoholic mixtures.
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Affiliation(s)
- Asmaa Selim
- Environmental
and Process Engineering Research Group, Department of Chemical and
Environmental Process Engineering, Faculty of Chemical Technology
and Biotechnology, Budapest University of
Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
- Chemical
Engineering Department, National Research
Centre, 33 El Buhouth
Street, 12622 Cairo, Egypt
| | - András Jozsef Toth
- Environmental
and Process Engineering Research Group, Department of Chemical and
Environmental Process Engineering, Faculty of Chemical Technology
and Biotechnology, Budapest University of
Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
| | - Daniel Fozer
- Environmental
and Process Engineering Research Group, Department of Chemical and
Environmental Process Engineering, Faculty of Chemical Technology
and Biotechnology, Budapest University of
Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
| | - Karoly Süvegh
- Laboratory
of Nuclear Chemistry, Eötvös
Loránd University/HAS Chemical Research Center, P.O. Box 32, H-1518, Budapest 112, Hungary
| | - Péter Mizsey
- Environmental
and Process Engineering Research Group, Department of Chemical and
Environmental Process Engineering, Faculty of Chemical Technology
and Biotechnology, Budapest University of
Technology and Economics, H-1521 Budapest, P.O.B. 91, Hungary
- Institute
of Chemistry, University of Miskolc, H-3515 Miskolc, Hungary
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Selim A, Toth AJ, Fozer D, Szanyi A, Mizsey P. Pervaporative Dehydration of Methanol Using PVA/Nanoclay Mixed Matrix Membranes: Experiments and Modeling. MEMBRANES 2020; 10:membranes10120435. [PMID: 33348791 PMCID: PMC7766437 DOI: 10.3390/membranes10120435] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/10/2020] [Accepted: 12/14/2020] [Indexed: 11/16/2022]
Abstract
Encouraged by the industrial problem of removing water from methanol solutions, a simple exfoliation method is applied to prepare polyvinyl alcohol (PVA)/laponite nanoclay mixed matrix membranes (MMMs). The membranes are used for the pervaporative dehydration of the methanol-water solution. The influence of the nanoclay content on the pervaporation performance is investigated. The results show that the PVA10 membrane containing 10 wt% Laponite loading exhibits excellent separation efficiency; therefore, all the experimental work is continued using the same membrane. Additionally, the effects of feed concentration and temperature on methanol dehydration performance are thoroughly investigated. The temperatures are ranging from 40–70 °C and the water feed concentrations from 1–15 wt% water. A maximum separation factor of 1120 can be observed at 40 °C and the feed water concentration of 1 wt%. Remarkably, two solution–diffusion models, the Rautenbach (Model I) and modified method by Valentínyi et al. (Model II), are used and compared to evaluate and describe the pervaporation performance of the mixed matrix membrane. Model II proves to be more appropriate for the modeling of pervaporative dehydration of methanol than Model I. This work demonstrates that PVA/nanoclay mixed matrix membranes prepared can efficiently remove water from methanol aqueous solution with pervaporation and the whole process can be accurately modeled with Model II.
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Affiliation(s)
- Asmaa Selim
- Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (A.J.T.); (D.F.); (A.S.); (P.M.)
- Chemical Engineering Department, National Research Centre, 33 El Buhouth Street, Cairo 12622, Egypt
- Correspondence: or
| | - András Jozsef Toth
- Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (A.J.T.); (D.F.); (A.S.); (P.M.)
| | - Daniel Fozer
- Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (A.J.T.); (D.F.); (A.S.); (P.M.)
| | - Agnes Szanyi
- Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (A.J.T.); (D.F.); (A.S.); (P.M.)
| | - Péter Mizsey
- Environmental and Process Engineering Research Group, Department of Chemical and Environmental Process Engineering, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, H-1521 Budapest, Hungary; (A.J.T.); (D.F.); (A.S.); (P.M.)
- Institute of Chemistry, University of Miskolc, H-3513 Miskolc, Hungary
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Versatile poly(vinyl alcohol)/clay physical hydrogels with tailorable structure as potential candidates for wound healing applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110395. [DOI: 10.1016/j.msec.2019.110395] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 10/20/2019] [Accepted: 11/04/2019] [Indexed: 01/07/2023]
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Pervaporative desalination of concentrated brine solution employing crosslinked PVA/silicate nanoclay membranes. Chem Eng Res Des 2020. [DOI: 10.1016/j.cherd.2020.01.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Selim A, Toth AJ, Haaz E, Fozer D, Szanyi A, Hegyesi N, Mizsey P. Preparation and characterization of PVA/GA/Laponite membranes to enhance pervaporation desalination performance. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.03.084] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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