1
|
Kaczmarek-Szczepańska B, Zasada L, Wekwejt M, Brzezinska MS, Michno A, Ronowska A, Ciesielska M, Kovtun G, Cuberes MT. PVA-Based Films with Strontium Titanate Nanoparticles Dedicated to Wound Dressing Application. Polymers (Basel) 2024; 16:484. [PMID: 38399862 PMCID: PMC10893095 DOI: 10.3390/polym16040484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/30/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Bioactive materials may be applied in tissue regeneration, and an example of such materials are wound dressings, which are used to accelerate skin healing, especially after trauma. Here, we proposed a novel dressing enriched by a bioactive component. The aim of our study was to prepare and characterize poly(vinyl alcohol) films modified with strontium titanate nanoparticles. The physicochemical properties of films were studied, such as surface free energy and surface roughness, as well as the mechanical properties of materials. Moreover, different biological studies were carried out, like in vitro hemo- and cyto-compatibility, biocidal activity, and anti-biofilm formation. Also, the degradation of the materials' utilization possibilities and enzymatic activity in compost were checked. The decrease of surface free energy, increase of roughness, and improvement of mechanical strength were found after the addition of nanoparticles. All developed films were cyto-compatible, and did not induce a hemolytic effect on the human erythrocytes. The PVA films containing the highest concentration of STO (20%) reduced the proliferation of Eschericha coli, Pseudomonas aeruginosa, and Staphylococcus aureus significantly. Also, all films were characterized by surface anti-biofilm activity, as they significantly lowered the bacterial biofilm abundance and its dehydrogenase activity. The films were degraded by the compost microorganism. However, PVA with the addition of 20%STO was more difficult to degrade. Based on our results, for wound dressing application, we suggest using bioactive films based on PVA + 20%STO, as they were characterized by high antibacterial properties, favorable physicochemical characteristics, and good biocompatibility with human cells.
Collapse
Affiliation(s)
- Beata Kaczmarek-Szczepańska
- Department of Biomaterials and Cosmetics Chemistry, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, 87-100 Toruń, Poland; (L.Z.); (M.C.)
| | - Lidia Zasada
- Department of Biomaterials and Cosmetics Chemistry, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, 87-100 Toruń, Poland; (L.Z.); (M.C.)
| | - Marcin Wekwejt
- Department of Biomaterials Technology, Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, 80-233 Gdańsk, Poland;
| | - Maria Swiontek Brzezinska
- Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Torun, Lwowska 1, 87-100 Torun, Poland;
| | - Anna Michno
- Department of Molecular Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (A.M.); (A.R.)
| | - Anna Ronowska
- Department of Molecular Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (A.M.); (A.R.)
| | - Magdalena Ciesielska
- Department of Biomaterials and Cosmetics Chemistry, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, 87-100 Toruń, Poland; (L.Z.); (M.C.)
| | - Ganna Kovtun
- Institute of Magnetism NAS of Ukraine and MES of Ukraine, Blvd. Acad. Vernadsky 36-b, 03142 Kyiv, Ukraine;
- Department of Applied Mechanics and Project Engineering, Mining and Industrial Engineering School of Almaden, University of Castilla-La Mancha, Plaza Manuel Meca 1, 13400 Almadén, Spain;
| | - M. Teresa Cuberes
- Department of Applied Mechanics and Project Engineering, Mining and Industrial Engineering School of Almaden, University of Castilla-La Mancha, Plaza Manuel Meca 1, 13400 Almadén, Spain;
| |
Collapse
|
2
|
Elhmali HT, Stajcic I, Stajcic A, Pesic I, Jovanovic M, Petrovic M, Radojevic V. Influence of Novel SrTiO 3/MnO 2 Hybrid Nanoparticles on Poly(methyl methacrylate) Thermal and Mechanical Behavior. Polymers (Basel) 2024; 16:278. [PMID: 38276687 PMCID: PMC10820619 DOI: 10.3390/polym16020278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 12/30/2023] [Accepted: 12/30/2023] [Indexed: 01/27/2024] Open
Abstract
While dental poly methyl methacrylate(PMMA) possesses distinctive qualities such as ease of fabrication, cost-effectiveness, and favorable physical and mechanical properties, these attributes alone are inadequate to impart the necessary impact strength and hardness. Consequently, pure PMMA is less suitable for dental applications. This research focused on the incorporation of Strontium titanate (SrTiO3-STO) and hybrid filler STO/Manganese oxide (MnO2) to improve impact resistance and hardness. The potential of STO in reinforcing PMMA is poorly investigated, while hybrid filler STO/MnO2 has not been presented yet. Differential scanning calorimetry is conducted in order to investigate the agglomeration influence on the PMMA glass transition temperature (Tg), as well as the leaching of residual monomer and volatile additives that could pose a threat to human health. It has been determined that agglomeration with 1 wt% loading had no influence on Tg, while the first scan revealed differences in evaporation of small molecules, in favor of composite PMMA-STO/MnO2, which showed the trapping potential of volatiles. Investigations of mechanical properties have revealed the significant influence of hybrid STO/MnO2 filler on microhardness and total absorbed impact energy, which were increased by 89.9% and 145.4%, respectively. Results presented in this study revealed the reinforcing potential of hybrid nanoparticles that could find application in other polymers as well.
Collapse
Affiliation(s)
- Houda Taher Elhmali
- Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia; (H.T.E.); (M.J.); (M.P.); (V.R.)
| | - Ivana Stajcic
- Department of Physical Chemistry, “Vinča” Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, Mike Petrovića Alasa 12-14, P.O. Box 522, 11001 Belgrade, Serbia
| | - Aleksandar Stajcic
- Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.S.); (I.P.)
| | - Ivan Pesic
- Center for Microelectronic Technologies, Institute of Chemistry, Technology and Metallurgy—National Institute of the Republic of Serbia, University of Belgrade, 11000 Belgrade, Serbia; (A.S.); (I.P.)
| | - Marija Jovanovic
- Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia; (H.T.E.); (M.J.); (M.P.); (V.R.)
| | - Milos Petrovic
- Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia; (H.T.E.); (M.J.); (M.P.); (V.R.)
| | - Vesna Radojevic
- Faculty of Technology and Metallurgy, University of Belgrade, 11000 Belgrade, Serbia; (H.T.E.); (M.J.); (M.P.); (V.R.)
| |
Collapse
|
3
|
Das A, Dobbidi P, Bhardwaj A, Saxena V, Pandey LM. Microstructural, electrical and biological activity in [Formula: see text] ceramic composites designed for tissue engineering applications. Sci Rep 2021; 11:22304. [PMID: 34785708 PMCID: PMC8595382 DOI: 10.1038/s41598-021-01748-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 10/25/2021] [Indexed: 11/21/2022] Open
Abstract
The article investigates electrically active ceramic composite of [Formula: see text] (HAP) and [Formula: see text] (BST) for biomedical applications. The study is a systematic blend of the materials science aspect of composites with a special focus on the dielectric and biological properties and their relationships. The article emphasized primarily extracting the dielectric constant ([Formula: see text] of the specimens (that lay in the range of 3-65) and related them to microstructural properties like the grain size and at.% of BST. A broad outlook on the importance of [Formula: see text] in determining the suitability of bioceramics for clinical applications is presented. Bioactivity analysis of the specimens led to probing the surface charges (that were negative), and it was found crucial to the growth of dense apatite layers. Furthermore, the cytocompatibility of the specimens displayed cell viability above 100% for Day 1, which increased substantially for Day 3. To reveal other biological properties of the composites, protein adsorption studies using bovine serum albumin (BSA) and fetal bovine serum (FBS) was carried out. Electrostatic interactions govern the adsorption, and the mathematical dependence on surface charges is linear. The protein adsorption is also linearly correlated with the [Formula: see text], intrinsic to the biomaterials. We delve deeper into protein-biomaterials interactions by considering the evolution of the secondary structure of BSA adsorbed into the specimens. Based on the investigations, 20 at.% HAP-80 at.% BST (20H-80B) was established as a suitable composite comprising the desired features of HAP and BST. Such explorations of electrical and biological properties are interesting for modulating the behavior of bioceramic composites. The results project the suitability of 20H-80B for designing electrically active smart scaffolds for the proposed biomedical applications and are expected to incite further clinical trials.
Collapse
Affiliation(s)
- Apurba Das
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039 India
- Department of Physics, D K College, Mirza, Assam 781125 India
| | - Pamu Dobbidi
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati, 781039 India
| | - Aman Bhardwaj
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039 India
| | - Varun Saxena
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039 India
| | - Lalit M. Pandey
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, 781039 India
| |
Collapse
|
4
|
Das A, Dobbidi P. Variable Range Hopping in SrTiO 3-Ca 10(PO 4) 6(OH) 2 Bio-Ceramic Composites. ACS OMEGA 2021; 6:25916-25925. [PMID: 34660954 PMCID: PMC8515364 DOI: 10.1021/acsomega.1c02273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
We investigate the electrical properties in ceramics, focusing primarily on the conductivity mechanisms crucial to bio-electrets' service life. A biocompatible ceramic composite of varying concentrations of SrTiO3 (ST) and Ca10(PO4)6(OH)2 (HAP) is developed. By X-ray diffraction, we establish the microstructural and phase evolution of the bio-composites. The crystallite sizes are found to increase with the increasing concentration of ST in the composites. The composites' micrograph reveals the presence of pores, and the grain sizes calculated from it are found to follow a trend similar to the crystallite size. The conduction mechanisms in the composites are studied to explore the composites' electrical properties from the perspective of biological applications. The conductivity is very low (≃10-8 S/cm), and the porous structure of the composites revealed from the micrographs is one of the factors for such low conductivity. From a plethora of conduction mechanisms, Motts' variable range hopping (VRH) conduction is projected as the most appropriate mechanism that appropriately describes the conduction process in the composites. Motts' VRH is also related to the polarization mechanism associated with the development of electrets. Our study points toward the practical potential of applying the designed bio-composites in generating bio-electrets or understanding the electrical properties that are at the forefront of research in designing electro-active smart scaffolds for bone tissue engineering applications.
Collapse
|
5
|
García I, Trobajo C, Amghouz Z, Alonso-Guervos M, Díaz R, Mendoza R, Mauvezín-Quevedo M, Adawy A. Ag- and Sr-enriched nanofibrous titanium phosphate phases as potential antimicrobial cement and coating for a biomedical alloy. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112168. [PMID: 34082969 DOI: 10.1016/j.msec.2021.112168] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2021] [Revised: 04/22/2021] [Accepted: 04/29/2021] [Indexed: 10/21/2022]
Abstract
Biomaterials and their surfaces regulate the biological response and ultimately the quality of healing at a possible site of implantation. The physical, chemical and topographical properties of implants' surfaces play a decisive role in the biological integration process for their immediate loading and long-term success. Since at this level of biological interaction nano-dimensionality is basically entailed, bio-functional nanostructured composites either as filling/cement or coating to metallic implants are required. This study shows the possibility of synthesizing two phases of nanostructured titanium phosphate (π and ρ polymorphs) and enriching them with silver nanoparticles and strontium. More importantly, Ag-Sr-enriched nanostructured π‑titanium phosphate is induced to grow on a commercially available titanium alloy (Ti-6Al-4V), widely used in orthopedic and dental implants, under highly controlled conditions. Structural and microscopic studies, using XRD, HRTEM and SEM altogether confirm the resultant phases and their enrichment with strontium and silver nanoparticles with an average particle size around 6 nm. Using confocal laser scanning microscopy, the surface roughness was measured and is found to lay at the interface between the nanosized and microsized topologies. Ion release assessments showed that the presence of strontium controlled the release rate of silver ions and this could be beneficial in terms of decreasing the accompanied cytotoxicity that is usually encountered at high concentrations of silver release. Antimicrobial and cell proliferation assays have proved that enriching titanium phosphate with strontium and silver nanoparticles has improved their antimicrobial properties, while the cytotoxicity could be controlled.
Collapse
Affiliation(s)
- Inés García
- Nanomaterials and Nanotechnology Research Centre - CINN (CSIC), 33940, El Entrego, Asturias, Spain
| | - Camino Trobajo
- Nanomaterials and Nanotechnology Research Centre - CINN (CSIC), 33940, El Entrego, Asturias, Spain; Department of Organic and Inorganic Chemistry, University of Oviedo, 33006 Oviedo, Spain
| | - Zakariae Amghouz
- Department of Material Science and Metallurgical Engineering, University of Oviedo, 33203 Gijón, Spain
| | - Marta Alonso-Guervos
- Optical Microscopy and Image Processing Unit, Institute for Scientific and Technological Resources (SCTs), University of Oviedo, 33006 Oviedo, Spain
| | - Raquel Díaz
- Nanomaterials and Nanotechnology Research Centre - CINN (CSIC), 33940, El Entrego, Asturias, Spain
| | - Rafael Mendoza
- Department of Physical and Analytical Chemistry, University of Oviedo, 33006 Oviedo, Spain
| | - Mario Mauvezín-Quevedo
- Department of Prosthodontics and Occlusion, School of Dentistry, University of Oviedo, 33006 Oviedo, Spain
| | - Alaa Adawy
- Laboratory of High-Resolution Transmission Electron Microscopy, Institute for Scientific and Technological Resources (SCTs), University of Oviedo, 33006 Oviedo, Spain.
| |
Collapse
|