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Zouari M, Hribernik S, Marrot L, Tzolov M, DeVallance DB. Manganese dioxide-coated biocarbon for integrated adsorption-photocatalytic degradation of formaldehyde in indoor conditions. Heliyon 2024; 10:e29993. [PMID: 38694080 PMCID: PMC11061683 DOI: 10.1016/j.heliyon.2024.e29993] [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: 03/11/2024] [Revised: 04/03/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024] Open
Abstract
Formaldehyde is a common indoor air pollutant with hazardous effects on human health. This study investigated the efficiency of biocarbon (BC) functionalized with variable contents of MnO2 for formaldehyde removal in ambient conditions via integrated adsorption-photocatalytic degradation technology. The sample with the highest formaldehyde removal potential was used to prepare a functional coating made of acrylic binder mixed with 20 wt% of the particles and applied on beech (Fagus sylvatica L) substrate. SEM images showed that MnO2 was deposited around and inside the pores of the BC. EDX spectra indicated the presence of Mn peaks and increased content of oxygen in the doped BC compared to pure BC, which indicated the successful formation of MnO2. Raman spectra revealed that the disorder in the BC's structure increased with increasing MnO2 loadings. FTIR spectra of BC-MnO2 samples displayed additional peaks compared to the BC spectrum, which were attributed to MnO vibrations. Moreover, the deposition of increased MnO2 loadings decreased the porosity of the BC due to pores blockage. The BC sample containing 8 % Mn exhibited the highest formaldehyde removal efficiency in 8 h, which was 91 %. A synergetic effect between BC and MnO2 was observed. The formaldehyde removal efficiency and capacity of the coating reached 43 % and 6.1 mg/m2, respectively, suggesting that the developed coating can be potentially used to improve air quality in the built environment.
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Affiliation(s)
- Mariem Zouari
- InnoRenew CoE, Livade 6a, 6310, Izola, Slovenia
- Faculty of Mathematics, Natural Sciences, and Information Technologies, University of Primorska, Muzejski trg 2, 6000, Koper, Slovenia
| | - Silvo Hribernik
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, SI-2000, Maribor, Slovenia
| | - Laetitia Marrot
- FRISSBE, Slovenian National Building and Civil Engineering Institute (ZAG), 1000, Ljubljana, Slovenia
| | - Marian Tzolov
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
| | - David B. DeVallance
- College of Science and Technology, Commonwealth University of Pennsylvania, 401 North Fairview Street, Lock Haven, PA, 17745, United States
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2
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Erjavec A, Volmajer Valh J, Hribernik S, Kraševac Glaser T, Fras Zemljič L, Vuherer T, Neral B, Brunčko M. Advance Analysis of the Obtained Recycled Materials from Used Disposable Surgical Masks. Polymers (Basel) 2024; 16:935. [PMID: 38611193 PMCID: PMC11013069 DOI: 10.3390/polym16070935] [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: 02/29/2024] [Revised: 03/21/2024] [Accepted: 03/26/2024] [Indexed: 04/14/2024] Open
Abstract
The production of personal protective equipment (PPE) has increased dramatically in recent years, not only because of the pandemic, but also because of stricter legislation in the field of Employee Protection. The increasing use of PPE, including disposable surgical masks (DSMs), is putting additional pressure on waste collectors. For this reason, it is necessary to find high-quality solutions for this type of waste. Mechanical recycling is still the most common type of recycling, but the recyclates are often classified as low-grade materials. For this reason, a detailed analysis of the recyclates is necessary. These data will help us to improve the properties and find the right end application that will increase the value of the materials. This work represents an extended analysis of the recyclates obtained from DSMs, manufactured from different polymers. Using surface and morphology tests, we have gained insights into the distribution of different polymers in polymer blends and their effects on mechanical and surface properties. It was found that the addition of ear loop material to the PP melt makes the material tougher. In the polymer blends obtained, PP and PA 6 form the surface (affects surface properties), while PU and PET are distributed mainly inside the injection-molded samples.
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Affiliation(s)
- Alen Erjavec
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Julija Volmajer Valh
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Silvo Hribernik
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia;
| | - Tjaša Kraševac Glaser
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Lidija Fras Zemljič
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Tomaž Vuherer
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Branko Neral
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
| | - Mihael Brunčko
- Faculty of Mechanical Engineering, University of Maribor, Smetanova cesta 17, 2000 Maribor, Slovenia; (J.V.V.); (T.K.G.); (L.F.Z.); (T.V.); (B.N.); (M.B.)
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Wypij M, Rai M, Zemljič LF, Bračič M, Hribernik S, Golińska P. Pullulan-based films impregnated with silver nanoparticles from the Fusarium culmorum strain JTW1 for potential applications in the food industry and medicine. Front Bioeng Biotechnol 2023; 11:1241739. [PMID: 37609118 PMCID: PMC10441246 DOI: 10.3389/fbioe.2023.1241739] [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: 06/17/2023] [Accepted: 07/25/2023] [Indexed: 08/24/2023] Open
Abstract
Introduction: Biopolymers, such as pullulan, a natural exopolysaccharide from Aureobasidium pullulans, and their nanocomposites are commonly used in the food, pharmaceutical, and medical industries due to their unique physical and chemical properties. Methods: Pullulan was synthesized by the A. pullulans ATCC 201253 strain. Nanocomposite films based on biosynthesized pullulan were prepared and loaded with different concentrations of silver nanoparticles (AgNPs) synthesized by the Fusarium culmorum strain JTW1. AgNPs were characterized by transmission electron microscopy, Zeta potential measurements, and Fourier-transform infrared spectroscopy. In turn, the produced films were subjected to physico-chemical analyses such as goniometry, UV shielding capacity, attenuated total reflection-Fourier-transform infrared spectroscopy, scanning electron microscopy, and X-ray photoelectron spectroscopy, and their mechanical and degradation properties were assessed. The antibacterial assays of the nanoparticles and the nanocomposite films against both food-borne and reference pathogens, including Listeria monocytogenes, Salmonella infantis, Salmonella enterica, Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella pneumoniae, were performed using standard methods. Results: AgNPs were small (mean 15.1 nm), spherical, and displayed good stability, being coated with protein biomolecules. When used in higher concentrations as an additive to pullulan films, they resulted in reduced hydrophilicity and light transmission for both UV-B and UV-A lights. Moreover, the produced films exhibited a smooth surface. Therefore, it can be concluded that the addition of biogenic AgNPs did not change the morphology and texture of the films compared to the control film. The nanoparticles and nanocomposite films demonstrated remarkable antibacterial activity against both food-borne and reference bacteria. The highest activity of the prepared films was observed against L. monocytogenes. Discussion: The obtained results suggest that the novel nanocomposite films prepared from biosynthesized pullulan and AgNPs can be considered for use in the development of medical products and food packaging. Moreover, this is the first report on pullulan-based nanocomposites with mycogenic AgNPs for such applications.
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Affiliation(s)
- Magdalena Wypij
- Department of Microbiology, Nicolaus Copernicus University in Torun, Torun, Poland
| | - Mahendra Rai
- Department of Microbiology, Nicolaus Copernicus University in Torun, Torun, Poland
- Nanobiotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, India
| | | | - Matej Bračič
- Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Silvo Hribernik
- Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Patrycja Golińska
- Department of Microbiology, Nicolaus Copernicus University in Torun, Torun, Poland
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Elveren B, Hribernik S, Kurečič M. Fabrication of Polysaccharide-Based Halochromic Nanofibers via Needle-Less Electrospinning and Their Characterization: A Study of the Leaching Effect. Polymers (Basel) 2022; 14:polym14194239. [PMID: 36236187 PMCID: PMC9571342 DOI: 10.3390/polym14194239] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 11/25/2022] Open
Abstract
Responsive materials, i.e., smart materials, have the ability to change their physical or chemical properties upon certain external signals. The development of nanofibrous halochromic materials, specifically combining the pH-sensitive functionality and unique nanofiber properties, could yield interesting new applications, especially when the common problem of dye leaching is successfully tackled. Therefore, in this article, we studied the fabrication process of polysaccharide-based halochromic nanofibrous materials by using a combination of various halochromic dyes (bromothymol blue, bromocresol green, and thymol blue) and cellulose acetate in a spinning solution using a one-pot strategy. The inhibition of leaching was addressed by using a complexing agent: poly-diallyl-dimethylammonium chloride (PDADMAC). The preparation of hybrid spinning solutions, their characterization, and ability to form continuous nanofibers were studied using a high production needle-less electrospinning system. The produced hybrid solutions and nanofibers were characterized, in terms of their rheological properties, chemical structure, morphology, and functionality. Fabricated nanofibrous halochromic structures show a clear color change upon exposure to different pH values, as well as the reduced leaching of dyes, upon the addition of a complexing agent. The leaching decreased by 61% in the case of bromocresol green, while, in the case of bromothymol blue and thymol blue, the leaching was reduced by 95 and 99%, respectively.
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Affiliation(s)
- Beste Elveren
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Silvo Hribernik
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
- Institute of Automation, Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroska cesta 46, 2000 Maribor, Slovenia
| | - Manja Kurečič
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
- Correspondence:
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Gorgieva S, Osmić A, Hribernik S, Božič M, Svete J, Hacker V, Wolf S, Genorio B. Efficient Chitosan/Nitrogen-Doped Reduced Graphene Oxide Composite Membranes for Direct Alkaline Ethanol Fuel Cells. Int J Mol Sci 2021; 22:1740. [PMID: 33572312 PMCID: PMC7916145 DOI: 10.3390/ijms22041740] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 02/02/2021] [Accepted: 02/03/2021] [Indexed: 01/28/2023] Open
Abstract
Herein, we prepared a series of nanocomposite membranes based on chitosan (CS) and three compositionally and structurally different N-doped graphene derivatives. Two-dimensional (2D) and quasi 1D N-doped reduced graphene oxides (N-rGO) and nanoribbons (N-rGONRs), as well as 3D porous N-doped graphitic polyenaminone particles (N-pEAO), were synthesized and characterized fully to confirm their graphitic structure, morphology, and nitrogen (pyridinic, pyrrolic, and quaternary or graphitic) group contents. The largest (0.07%) loading of N-doped graphene derivatives impacted the morphology of the CS membrane significantly, reducing the crystallinity, tensile properties, and the KOH uptake, and increasing (by almost 10-fold) the ethanol permeability. Within direct alkaline ethanol test cells, it was found that CS/N rGONRs (0.07 %) membrane (Pmax. = 3.7 mWcm-2) outperformed the pristine CS membrane significantly (Pmax. = 2.2 mWcm-2), suggesting the potential of the newly proposed membranes for application in direct ethanol fuel cells.
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Affiliation(s)
- Selestina Gorgieva
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (S.G.); (S.H.)
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia;
| | - Azra Osmić
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia;
| | - Silvo Hribernik
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia; (S.G.); (S.H.)
- Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia;
| | - Mojca Božič
- Dravske Elektrarne Maribor d.o.o., Obrežna ulica 170, 2000 Maribor, Slovenia;
| | - Jurij Svete
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia;
| | - Viktor Hacker
- Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria; (V.H.); (S.W.)
| | - Sigrid Wolf
- Institute of Chemical Engineering and Environmental Technology, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria; (V.H.); (S.W.)
| | - Boštjan Genorio
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia;
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6
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Amornkitbamrung L, Bračič D, Bračič M, Hribernik S, Malešič J, Hirn U, Vesel A, Kleinschek KS, Kargl R, Mohan T. Comparison of Trimethylsilyl Cellulose-Stabilized Carbonate and Hydroxide Nanoparticles for Deacidification and Strengthening of Cellulose-Based Cultural Heritage. ACS Omega 2020; 5:29243-29256. [PMID: 33225155 PMCID: PMC7676302 DOI: 10.1021/acsomega.0c03997] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
Herein, colloidal dispersions of alkaline nanoparticles (NPs: CaCO3 and Mg(OH)2) are stabilized by trimethylsilyl cellulose (TMSC) in hexamethyldisiloxane and employed to treat historical wood pulp paper by an effortless dip-coating technique. Both alkaline NPs exhibit high stability and no size and shape changes upon stabilization with the polymer, as shown by UV-vis spectroscopy and transmission electron microscopy. The long-term effect of NP/TMSC coatings is investigated in detail using accelerated aging. The results from the pH-test and back-titration of coated papers show a complete acid neutralization (pH ∼ 7.4) and introduction of adequate alkaline reserve even after prolonged accelerated aging. Scanning electron microscopy-energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and infrared and water contact angle measurements showed the introduction of a thin and smooth hydrophobic NP/TMSC coating on the paper fibers. Acid-catalyzed desilylation of TMSC was observed by declining C-Si infrared absorbance peaks upon aging. The CaCO3 coatings are superior to Mg(OH)2 with respect to a reduced yellowing and lower cellulose degradation upon aging as shown by colorimetric measurements and degree of polymerization analysis. The tensile strength and folding endurance of coated and aged papers are improved to 200-300 and 50-70% as illustrated by tensile strength and double folding endurance measurements.
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Affiliation(s)
- Lunjakorn Amornkitbamrung
- Renewable
Energy Business Group, Mitr Phol Bio-Power
Co., Ltd., 2 Ploenchit
Center, Sukhumvit Road, Klongtoey, 10110 Bangkok, Thailand
| | - Doris Bračič
- Laboratory
for Characterization and Processing of Polymers, Faculty of Mechanical
Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Matej Bračič
- Laboratory
for Characterization and Processing of Polymers, Faculty of Mechanical
Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
| | - Silvo Hribernik
- Laboratory
for Characterization and Processing of Polymers, Faculty of Mechanical
Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
- Institute
of Automation, Faculty of Electrical Engineering and Computer Science, University of Maribor, Koroška cesta 46, 2000 Maribor, Slovenia
| | - Jasna Malešič
- National
and University Library, Turjaška 1, 1000 Ljubljana, Slovenia
| | - Ulrich Hirn
- Institute
of Bioproducts and Paper Technology, Graz
University of Technology, Inffeldgasse 23, 8010 Graz, Austria
| | - Alenka Vesel
- Department
of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Teslova 30, SI-1000 Ljubljana, Slovenia
| | - Karin Stana Kleinschek
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Rupert Kargl
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Tamilselvan Mohan
- Laboratory
for Characterization and Processing of Polymers, Faculty of Mechanical
Engineering, University of Maribor, Smetanova Ulica 17, 2000 Maribor, Slovenia
- Institute
for Chemistry and Technology of Biobased Systems (IBioSys), Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
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Ojstršek A, Fakin D, Hribernik S, Fakin T, Bračič M, Kurečič M. Electrospun nanofibrous composites from cellulose acetate / ultra-high silica zeolites and their potential for VOC adsorption from air. Carbohydr Polym 2020; 236:116071. [DOI: 10.1016/j.carbpol.2020.116071] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Revised: 02/18/2020] [Accepted: 02/25/2020] [Indexed: 12/18/2022]
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Bratuša A, Elschner T, Heinze T, Fröhlich E, Hribernik S, Božič M, Žagar E, Kleinschek KS, Thonhofer M, Kargl R. Functional dextran amino acid ester particles derived from N-protected S-trityl-L-cysteine. Colloids Surf B Biointerfaces 2019; 181:561-566. [DOI: 10.1016/j.colsurfb.2019.06.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/30/2019] [Accepted: 06/03/2019] [Indexed: 11/26/2022]
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Gorgieva S, Hribernik S. Microstructured and Degradable Bacterial Cellulose⁻Gelatin Composite Membranes: Mineralization Aspects and Biomedical Relevance. Nanomaterials (Basel) 2019; 9:E303. [PMID: 30813312 PMCID: PMC6409525 DOI: 10.3390/nano9020303] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 11/17/2022]
Abstract
Bacterial cellulose (BC)⁻gelatin (GEL) membranes were processed by successive periodate oxidation and a freeze-thawing/carbodiimide crosslinking procedure, first facilitating a Schiff-base reaction among respective aldehyde and hydroxyl groups, and later GEL stabilization and microstructuring. The formation of highly microporous structures within the GEL portion, with significant differences between bottom and top, was elucidated, and pores in the 27.6 ± 3 µm⁻108 ± 5 µm range were generated, exceeding the threshold value of ~10 µm sufficient for cell trafficking. During a relatively short (6 h) exhaustion procedure in supersaturated simulated body fluid solution, the membranes accommodated the combination of biologically relevant minerals, i.e., flake-like octacalcium phosphate (OCP) and (amorphous) apatite, onto their surface, forming a membrane with intensive swelling (650⁻1650%) and up to 90% weight loss in a 4-week period. The membranes´ 6-day eluates did not evoke any cytotoxic effects toward human fibroblast, MRC-5 cells. The same type of cells retained their morphology in direct contact with the membrane, attaching to the GEL porous site, while not attaching to the GEL thin-coated BC side, most probably due to combined, ablation effect of dominant β-sheet conformation and carbodiimide crosslinking. Together with arrested proliferation through the BC side, the membranes demonstrated beneficial properties for potential guided tissue regeneration (GTR) applications.
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Affiliation(s)
- Selestina Gorgieva
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
| | - Silvo Hribernik
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
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Kurečič M, Mohan T, Virant N, Maver U, Stergar J, Gradišnik L, Kleinschek KS, Hribernik S. A green approach to obtain stable and hydrophilic cellulose-based electrospun nanofibrous substrates for sustained release of therapeutic molecules. RSC Adv 2019; 9:21288-21301. [PMID: 35521346 PMCID: PMC9066020 DOI: 10.1039/c9ra03399h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 05/06/2019] [Accepted: 07/04/2019] [Indexed: 11/21/2022] Open
Abstract
Stable and (bio)-compatible nanofibrous matrices showing effective incorporation and release of nonsteroidal anti-inflammatory drugs (NSAIDs) hold a huge potential in tissue regeneration and wound healing.
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Affiliation(s)
- Manja Kurečič
- Laboratory for Characterization and Processing of Polymers
- Faculty of Mechanical Engineering
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers
- Faculty of Mechanical Engineering
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Natalija Virant
- Laboratory for Characterization and Processing of Polymers
- Faculty of Mechanical Engineering
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Uroš Maver
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Janja Stergar
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Lidija Gradišnik
- Institute of Biomedical Sciences
- Faculty of Medicine
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Karin Stana Kleinschek
- Laboratory for Characterization and Processing of Polymers
- Faculty of Mechanical Engineering
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Silvo Hribernik
- Laboratory for Characterization and Processing of Polymers
- Faculty of Mechanical Engineering
- University of Maribor
- 2000 Maribor
- Slovenia
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11
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Kurečič M, Rijavec T, Hribernik S, Lapanje A, Kleinschek KS, Maver U. Novel electrospun fibers with incorporated commensal bacteria for potential preventive treatment of the diabetic foot. Nanomedicine (Lond) 2018; 13:1583-1594. [PMID: 30028247 DOI: 10.2217/nnm-2018-0014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
AIM A novel electrospun biocompatible nanofibrous material loaded with commensal bacteria for potential preventive treatment of the diabetic foot was developed. MATERIALS & METHODS Two biocompatible polymers (carboxymethylcellulose and polyethylene oxide) were combined with a bacterium isolate from the skin located between the toes of a healthy adult (identified using a matrix-assisted laser desorption/ionization mass spectrometry-based method as a strain of Staphylococcus epidermidis). Higher bacteria loads in the material were assured through their encapsulation in polyethylenimine. The nanofibrous material was characterized using scanning electron microscopy, zeta-potential measurements and through evaluation of cell growth and viability. RESULTS & DISCUSSION nanometer formation was confirmed using scanning electron microscopy, while the zeta-potential measurements revealed successful bacteria encapsulation. Viable and sufficiently growing cells were confirmed prior and after their incorporation. CONCLUSION The prepared materials were proven suitable to deliver viable commensal bacteria in a comparable share to the Staphylococcaceae in the foot microbiome making this approach promising for preventive diabetic foot treatment.
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Affiliation(s)
- Manja Kurečič
- Laboratory for Characterization & Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.,Institute for Chemistry & Technology of Materials, Graz University of Technology, Stremayrgasse 9, AT-8010 Graz, Austria
| | - Tomaž Rijavec
- Department for Environmental Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Silvo Hribernik
- Laboratory for Characterization & Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
| | - Aleš Lapanje
- Department for Environmental Sciences, Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Karin S Kleinschek
- Laboratory for Characterization & Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.,Institute for Chemistry & Technology of Materials, Graz University of Technology, Stremayrgasse 9, AT-8010 Graz, Austria
| | - Uroš Maver
- Department of Pharmacology, Faculty of Medicine, Institute of Biomedical Sciences & University of Maribor, Taborska ulica 8, SI-2000 Maribor, Slovenia
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Ojstršek A, Hribernik S, Fakin D. Thermal, Mechanical and Optical Features of Aluminosilicate-Coated Cotton Textiles via the Crosslinking Method. Polymers (Basel) 2018; 10:E57. [PMID: 30966092 PMCID: PMC6415353 DOI: 10.3390/polym10010057] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 12/07/2017] [Revised: 01/04/2018] [Accepted: 01/05/2018] [Indexed: 12/02/2022] Open
Abstract
The presented study focuses on the development of a pad-dry-thermofix functional coating process using a mixture of microporous aluminosilicate particles in diverse bath formulations to impart UV-ray-blocking, thermal stability and easy-care properties to the cotton fabric. The results of Scanning Electron Microscopy (SEM) and X-ray powder Diffraction (XRD) revealed the presence of three different types of zeolites within the examined sample, i.e., the largest amount being zeolite A, followed by the zeolite X, and the zeolite ZSM-5. The surface characterization results of zeolite-coated/cross-linked textiles provided evidence of acceptable UV-ray-blocking properties and increased thermal stability, as well as enhanced tensile strength and breaking tenacity without considerably decreasing the whiteness degree. Moreover, the dry crease recovery angle increased for the cotton fabric cross-linked via an mDMDHEU, and decreased significantly using 30 g/L zeolites negatively influencing qualitative values. TG/DTA results have proven the enlarged thermal stability of aluminosilicate-coated cotton, although combustion was not prevented.
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Affiliation(s)
- Alenka Ojstršek
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
| | - Silvo Hribernik
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
| | - Darinka Fakin
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia.
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Gašparič P, Kurečič M, Kargl R, Maver U, Gradišnik L, Hribernik S, Kleinschek KS, Smole MS. Nanofibrous polysaccharide hydroxyapatite composites with biocompatibility against human osteoblasts. Carbohydr Polym 2017; 177:388-396. [DOI: 10.1016/j.carbpol.2017.08.111] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 07/02/2017] [Accepted: 08/26/2017] [Indexed: 11/17/2022]
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Maver T, Gradišnik L, Kurečič M, Hribernik S, Smrke D, Maver U, Kleinschek KS. Layering of different materials to achieve optimal conditions for treatment of painful wounds. Int J Pharm 2017; 529:576-588. [DOI: 10.1016/j.ijpharm.2017.07.043] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 07/08/2017] [Accepted: 07/12/2017] [Indexed: 01/22/2023]
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Pivec T, Hribernik S, Kolar M, Kleinschek KS. Environmentally friendly procedure for in-situ coating of regenerated cellulose fibres with silver nanoparticles. Carbohydr Polym 2017; 163:92-100. [PMID: 28267522 DOI: 10.1016/j.carbpol.2017.01.060] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 09/16/2016] [Revised: 12/25/2016] [Accepted: 01/17/2017] [Indexed: 11/30/2022]
Abstract
This study introduces a novel green in-situ procedure for introduction of silver nanoparticles (Ag NPs) on and into cellulose fibres in a three-stage process. First-stage of the process includes the activation of cellulose fibres in alkaline solution, followed by reduction of silver nitrate to Ag NPs in the second stage, while the last stage of process involves washing and neutralization of fibres. Efficiency of the method towards incorporation of silver particles into the fibres' internal structure was characterized; the coatings' morphology and determination of spatial presence of Ag particles were imagining by the scanning electron microscopy and accompanying energy dispersive x-ray spectroscopy analysis; prepared fibres have superior durability of particles' coating against washing and excellent antimicrobial activity even after 20 washing cycles. Additionally, the water retention of silver treated fibres was improved, while the mechanical properties were not significantly impaired.
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Affiliation(s)
- Tanja Pivec
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.
| | - Silvo Hribernik
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.
| | - Mitja Kolar
- Faculty of Chemistry and Chemical Engineering, University of Ljubljana, Večna Pot, 113 SI-1000 Ljubljana, Slovenia.
| | - Karin Stana Kleinschek
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia.
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Hribernik S, Stana Kleinschek K, Rihm R, Ganster J, Fink HP, Sfiligoj Smole M. Tuning of cellulose fibres’ structure and surface topography: Influence of swelling and various drying procedures. Carbohydr Polym 2016; 148:227-35. [DOI: 10.1016/j.carbpol.2016.04.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 03/06/2016] [Accepted: 04/11/2016] [Indexed: 10/21/2022]
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17
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Božič M, Vivod V, Vogrinčič R, Ban I, Jakša G, Hribernik S, Fakin D, Kokol V. Enhanced catalytic activity of the surface modified TiO2-MWCNT nanocomposites under visible light. J Colloid Interface Sci 2015; 465:93-105. [PMID: 26669495 DOI: 10.1016/j.jcis.2015.11.051] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [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: 09/08/2015] [Revised: 11/20/2015] [Accepted: 11/20/2015] [Indexed: 11/18/2022]
Abstract
Fusing multiwall carbon nanotubes (MWCNTs) with TiO2 at the nano-scale level promotes the separation of those electron-hole charges generated upon UV and daylight irradiation. In this study, we investigated facile sonochemical synthesis, combined with the calcination process for the preparations of TiO2-MWCNT composites with different mole ratios of titanium and carbon. In order to produce stable nano dispersions we exploited an innovative biotechnology-based approach for the covalent functionalizations of TiO2-MWCNTs with in-situ synthesized soluble phenoxazine dye molecules. The none and functionalized TiO2-MWCNTs composites were analyzed by a range of analytical techniques including XRD, Raman, XPS, SEM and UV-vis diffuse reflectance spectroscopy (DRS), and dynamic light scattering (DLS). The photocatalytic activity was evaluated toward the liquid-phase degradation of MB in aqueous solution under both UV and visible light irradiation. TiO2-MWCNTs with optimized mole ratio exhibit much higher photocatalytic activity and stability than bare TiO2. The as-prepared TiO2-MWCNTs photocatalyst possessed good adsorptivity of dyes, extended light absorption range and efficient charge separation properties simultaneously. The results indicated that the soluble phenoxazine dyes and amino-benzenesulfonic acid monomers were covalently grafted on to the surfaces of TiO2-MCNTs, which promoted good aquatic dispersibility and extended light absorption, resulting in increased photocatalytic efficiency.
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Affiliation(s)
- Mojca Božič
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia.
| | - Vera Vivod
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Robert Vogrinčič
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Irena Ban
- University of Maribor, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Gregor Jakša
- Institute Jožef Stefan, Jamova 39, SI-1000 Ljubljana, Slovenia
| | - Silvo Hribernik
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Darinka Fakin
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia
| | - Vanja Kokol
- University of Maribor, Institute for Engineering Materials and Design, Smetanova ulica 17, SI-2000 Maribor, Slovenia
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Amornkitbamrung L, Mohan T, Hribernik S, Reichel V, Faivre D, Gregorova A, Engel P, Kargl R, Ribitsch V. Polysaccharide stabilized nanoparticles for deacidification and strengthening of paper. RSC Adv 2015. [DOI: 10.1039/c4ra15153d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This paper reports an investigation on the use of a highly stable colloidal organic dispersion consisting of a polysaccharides and alkaline nanoparticles for the simultaneous deacidification and strengthening of historical wood pulp papers.
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Affiliation(s)
| | | | - Silvo Hribernik
- Faculty of Mechanical Engineering
- Institute for Engineering Materials and Design
- University of Maribor
- 2000 Maribor
- Slovenia
| | - Victoria Reichel
- Department of Biomaterials
- Max Planck Institute of Colloids and Interfaces
- Potsdam
- Germany
| | - Damien Faivre
- Department of Biomaterials
- Max Planck Institute of Colloids and Interfaces
- Potsdam
- Germany
| | - Adriana Gregorova
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- AT 8010 Graz
- Austria
| | - Patricia Engel
- European Research Centre for Book and Paper Conservation-Restoration
- Donau-Universität Krems
- 3500 Krems
- Austria
| | - Rupert Kargl
- Faculty of Mechanical Engineering
- Institute for Engineering Materials and Design
- University of Maribor
- 2000 Maribor
- Slovenia
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Maver T, Hribernik S, Mohan T, Smrke DM, Maver U, Stana-Kleinschek K. Functional wound dressing materials with highly tunable drug release properties. RSC Adv 2015. [DOI: 10.1039/c5ra11972c] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Tuning of diclofenac release was achieved through incorporation into four different wound dressing materials. Proposed specific material-drug combinations could greatly improve efficiency in treatment of different wound types.
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Affiliation(s)
- Tina Maver
- Faculty of Mechanical Engineering
- Laboratory for Characterisation and Processing of Polymers
- University of Maribor
- SI-2000 Maribor
- Slovenia
| | - Silvo Hribernik
- Faculty of Mechanical Engineering
- Laboratory for Characterisation and Processing of Polymers
- University of Maribor
- SI-2000 Maribor
- Slovenia
| | | | | | - Uroš Maver
- Faculty of Medicine
- Department of Pharmacology and Experimental Toxicology
- University of Maribor
- SI-2000 Maribor
- Slovenia
| | - Karin Stana-Kleinschek
- Faculty of Mechanical Engineering
- Laboratory for Characterisation and Processing of Polymers
- University of Maribor
- SI-2000 Maribor
- Slovenia
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20
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Mohan T, Kargl R, Tradt KE, Kulterer MR, Braćić M, Hribernik S, Stana-Kleinschek K, Ribitsch V. Antifouling coating of cellulose acetate thin films with polysaccharide multilayers. Carbohydr Polym 2014; 116:149-58. [PMID: 25458284 DOI: 10.1016/j.carbpol.2014.04.068] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [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: 11/11/2013] [Revised: 04/11/2014] [Accepted: 04/15/2014] [Indexed: 11/30/2022]
Abstract
In this investigation, partially deacetylated cellulose acetate (DCA) thin films were prepared and modified with hydrophilic polysaccharides with the layer-by-layer (LbL) technique. As polysaccharides, chitosan (CHI) and carboxymethyl cellulose (CMC) were used. DCA thin films were manufactured by exposing spin coated cellulose acetate to potassium hydroxide solutions for various times. The deacetylation process was monitored by attenuated total reflectance-infrared spectroscopy, film thickness and static water contact angle measurements. A maximum of three bilayers was created from the alternating deposition of CHI and CMC on the DCA films under two different conditions namely constant ionic strengths and varying pH values of the CMC solutions. Precoatings of CMC at pH 2 were used as a base layer. The sequential deposition of CMC and CHI was investigated with a quartz crystal microbalance with dissipation, film thickness, static water contact angle and atomic force microscopy (AFM) measurements. The versatility and applicability of the developed functional coatings was shown by removing the multilayers by rinsing with mixtures containing HCl/NaCl. The developed LbL coatings are used for studying the fouling behavior of bovine serum albumin (BSA).
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Affiliation(s)
- Tamilselvan Mohan
- Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria.
| | - Rupert Kargl
- Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.
| | - Karin Eva Tradt
- Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Martin R Kulterer
- Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria
| | - Matej Braćić
- Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Silvo Hribernik
- Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Karin Stana-Kleinschek
- Institute for the Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Volker Ribitsch
- Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstraße 28, 8010 Graz, Austria
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21
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Bračič M, Mohan T, Kargl R, Griesser T, Hribernik S, Köstler S, Stana-Kleinschek K, Fras-Zemljič L. Preparation of PDMS ultrathin films and patterned surface modification with cellulose. RSC Adv 2014. [DOI: 10.1039/c3ra47380e] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Patterned surface functionalization of PDMS with the biopolymer cellulose via lithographic methods.
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Affiliation(s)
- Matej Bračič
- Institute for the Engineering and Design of Materials
- University of Maribor
- 2000 Maribor, Slovenia
- Savatech d.o.o. Industrial Rubber Products and Tyres
- 4000 Kranj, Slovenia
| | - Tamilselvan Mohan
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- 8010 Graz, Austria
| | - Rupert Kargl
- Institute for the Engineering and Design of Materials
- University of Maribor
- 2000 Maribor, Slovenia
| | - Thomas Griesser
- Chair of Chemistry of Polymeric Materials
- University of Leoben
- A-8700 Leoben, Austria
| | - Silvo Hribernik
- Institute for the Engineering and Design of Materials
- University of Maribor
- 2000 Maribor, Slovenia
| | - Stefan Köstler
- Joanneum Research Materials
- Institute for Surface Technologies and Photonics
- 8160 Weiz, Austria
| | - Karin Stana-Kleinschek
- Institute for the Engineering and Design of Materials
- University of Maribor
- 2000 Maribor, Slovenia
| | - Lidija Fras-Zemljič
- Institute for the Engineering and Design of Materials
- University of Maribor
- 2000 Maribor, Slovenia
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22
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Hribernik S, Sfiligoj-Smole M, Bele M, Gyergyek S, Jamnik J, Stana-Kleinschek K. Synthesis of magnetic iron oxide particles: Development of an in situ coating procedure for fibrous materials. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.02.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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23
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Kulterer MR, Reischl M, Reichel VE, Hribernik S, Wu M, Köstler S, Kargl R, Ribitsch V. Nanoprecipitation of cellulose acetate using solvent/nonsolvent mixtures as dispersive media. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2010.11.029] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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24
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Veronovski N, Hribernik S. SEM and TEM Characterization of Cellulose Fibers Functionalized with Inorganic Oxide Nanoparticles. ACTA ACUST UNITED AC 2010. [DOI: 10.1166/jamr.2010.1023] [Citation(s) in RCA: 3] [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: 11/23/2022]
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