1
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Scharfetter H, Gösweiner C, Krassnig PJ, Sampl C, Thonhofer M, Fischer R, Spirk S, Kargl R, Stana-Kleinschek K, Umut E, Kruk D. Aspects of structural order in 209Bi-containing particles for potential MRI contrast agents based on quadrupole enhanced relaxation. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1511869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Hermann Scharfetter
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Christian Gösweiner
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Paul Josef Krassnig
- Institute of Medical Engineering, Graz University of Technology, Graz, Austria
| | - Carina Sampl
- Institute of Paper, Pulp and Fiber Technology and Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | - Martin Thonhofer
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Roland Fischer
- Institute of Inorganic Chemistry Graz University of Technology, Graz, Austria
| | - Stefan Spirk
- Institute of Paper, Pulp and Fiber Technology and Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | - Rupert Kargl
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers (LCPP), Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia
| | - Evrim Umut
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Danuta Kruk
- Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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2
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Bračič M, Fras-Zemljič L, Pérez L, Kogej K, Stana-Kleinschek K, Kargl R, Mohan T. Protein-repellent and antimicrobial nanoparticle coatings from hyaluronic acid and a lysine-derived biocompatible surfactant. J Mater Chem B 2017; 5:3888-3897. [PMID: 32264250 DOI: 10.1039/c7tb00311k] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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]
Abstract
Biofilm formation triggered by uncontrolled protein adsorption, on medical devices is the leading cause of catheter-associated urinary tract infections (CAUTI) during implantation. Herein, we report a water-based, green and one-step strategy to functionalize surfaces of silicone catheters, poly(dimethylsiloxane) (PDMS), with antifouling and antimicrobial substances to avoid uncontrolled protein adsorption and microbial attachment. A novel synergetic formulation consisting of an anionic glycosaminoglycan (hyaluronic acid, HA) and a lysine-derived biocompatible cationic surfactant (Nε-myristoyl-lysine methyl ester, MKM) was prepared, resulting in the formation of nanoparticles (NPs, ca. 100-250 nm). Besides their high stability and long-lasting hydrophilicity in ambient and aqueous environments for 60 days, the nanometric layers (48 ± 3 nm) of HA-MKM NPs on PDMS showed no adsorption of BSA and lysozyme and substantially lower adsorption of fibrinogen as revealed by a quartz crystal microbalance with dissipation (QCM-D). In vitro antimicrobial test with S. aureus, E. coli, P. aeruginosa, P. mirabilis, C. albicans microbes under dynamic conditions revealed that the microbial growth was hampered by 85% compared with unmodified PDMS. Given the multiple functionalities, charges and diverse physiochemical properties of polysaccharide-lysine-based surfactant mixtures, this approach can be easily extended to the development of novel coatings on other silicone-based materials, thereby broadening potential applicability of PDMS-based biomaterials/devices in microfluidics, diagnostic biosensors and others.
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Affiliation(s)
- M Bračič
- Laboratory for Characterization and Processing of Polymers, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
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3
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Fras L, Stana-Kleinschek K, Ribitsch V, Sfiligoj-Smole M, Kreze T. Quantitative Determination Of Carboxyl Groups In Cellulose Polymers Utilizing Their Ion Exchange Capacity And Using A Complexometric Titration. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/14328917.2004.11784850] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Smole MS, Stana-Kleinschek K, Ribitsch V, Pointner B, Zipper P, Stakne K, Bele M. Electrokinetic properties of surface modified PETP fibres. ACTA ACUST UNITED AC 2016. [DOI: 10.1007/s10019-002-0158-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Majda Sfiligoj Smole
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI 2000 Maribor, SloveniaTel.: , Fax:
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI 2000 Maribor, SloveniaTel.: , Fax:
| | - Volker Ribitsch
- Institute for Chemistry, Karl Franzens University, Heinrichstraße 28, A-8010 Graz, Austria
| | - Birgit Pointner
- Institute for Chemistry, Karl Franzens University, Heinrichstraße 28, A-8010 Graz, Austria
| | - Peter Zipper
- Institute for Chemistry, Karl Franzens University, Heinrichstraße 28, A-8010 Graz, Austria
| | - Kristina Stakne
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI 2000 Maribor, SloveniaTel.: , Fax:
| | - Marjan Bele
- National Institute of Chemistry, Hajdrihova 19, SI 1000, Ljubljana, Slovenia
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5
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Strasser S, Niegelhell K, Kaschowitz M, Markus S, Kargl R, Stana-Kleinschek K, Slugovc C, Mohan T, Spirk S. Exploring Nonspecific Protein Adsorption on Lignocellulosic Amphiphilic Bicomponent Films. Biomacromolecules 2016; 17:1083-92. [DOI: 10.1021/acs.biomac.5b01700] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Simone Strasser
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Katrin Niegelhell
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Manuel Kaschowitz
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Sabina Markus
- Institute
of Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Rupert Kargl
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
- Institute
of Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Karin Stana-Kleinschek
- Institute
of Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | - Christian Slugovc
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Tamilselvan Mohan
- Institute
of Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Stefan Spirk
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
- Institute
of Engineering and Design of Materials, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
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6
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Mohan T, Rathner R, Reishofer D, Koller M, Elschner T, Spirk S, Heinze T, Stana-Kleinschek K, Kargl R. Designing Hydrophobically Modified Polysaccharide Derivatives for Highly Efficient Enzyme Immobilization. Biomacromolecules 2015. [DOI: 10.1021/acs.biomac.5b00638] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tamilselvan Mohan
- Institute
for Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - Raffael Rathner
- Institute
for Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
| | - David Reishofer
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Martin Koller
- Institute
for Chemistry, University of Graz, Heinrichstrasse 28, 8010 Graz, Austria
- ARENA − Association for Resource-Efficient and Sustainable Technologies, Inffeldgasse 21b, 8010 Graz, Austria
| | - Thomas Elschner
- Center of
Excellence for Polysaccharide Research, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Stefan Spirk
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Thomas Heinze
- Center of
Excellence for Polysaccharide Research, Friedrich Schiller University Jena, Humboldtstraße 10, 07743 Jena, Germany
| | - Karin Stana-Kleinschek
- Institute
for Engineering Materials and Design, University of Maribor, Smetanova
17, 2000 Maribor, Slovenia
| | - Rupert Kargl
- Institute
for Engineering Materials and Design, University of Maribor, Smetanova
17, 2000 Maribor, Slovenia
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7
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Ehmann HMA, Werzer O, Pachmajer S, Mohan T, Amenitsch H, Resel R, Kornherr A, Stana-Kleinschek K, Kontturi E, Spirk S. Surface-Sensitive Approach to Interpreting Supramolecular Rearrangements in Cellulose by Synchrotron Grazing Incidence Small-Angle X-ray Scattering. ACS Macro Lett 2015; 4:713-716. [PMID: 35596493 DOI: 10.1021/acsmacrolett.5b00306] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The supramolecular rearrangements of biopolymers have remained difficult to discern. Here, we present a versatile approach that allows for an in situ investigation of two major types of rearrangements typically observed with cellulose, the most abundant biopolymer on earth. Model thin films were employed to study time-resolved pore size changes using in situ grazing incidence small-angle X-ray scattering (GISAXS) during regeneration and drying.
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Affiliation(s)
- Heike M. A. Ehmann
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Oliver Werzer
- Institute
of Pharmaceutical Science, Department of Pharmaceutical Technology, Karl-Franzens University of Graz, Universitätsplatz 1, A-8010 Graz, Austria
| | - Stefan Pachmajer
- Institute
of Solid State Physics, Graz University of Technology, Petersgasse
16, A-8010 Graz, Austria
| | - Tamilselvan Mohan
- Institute
for Chemistry, Karl-Franzens University of Graz, Heinrichstraße
28, A-8010 Graz, Austria
| | - Heinz Amenitsch
- Institute
of Inorganic Chemistry, Graz University of Technology, Stremayrgasse
9, A-8010 Graz, Austria
| | - Roland Resel
- Institute
of Solid State Physics, Graz University of Technology, Petersgasse
16, A-8010 Graz, Austria
| | - Andreas Kornherr
- Mondi Uncoated Fine & Kraft Paper GmbH, Marxergasse 4A, 1030 Wien, Austria
| | - Karin Stana-Kleinschek
- Institute
for Engineering Materials and Design, University of Maribor, Smetanova
ulica 17, SI-2000 Maribor, Slovenia
| | - Eero Kontturi
- Polymer and Composites
Engineering group, Department of Forest Products Technology, Aalto University, PO
Box 16300, FI-00076 Aalto, Finland
- Department
of Chemical Engineering, Imperial College London, South Kensington
Campus, London SW7 2AZ, U.K
| | - Stefan Spirk
- Institute
for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
- Institute
for Engineering Materials and Design, University of Maribor, Smetanova
ulica 17, SI-2000 Maribor, Slovenia
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8
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Kolar M, Mozetič M, Stana-Kleinschek K, Fröhlich M, Turk B, Vesel A. Covalent Binding of Heparin to Functionalized PET Materials for Improved Haemocompatibility. Materials (Basel) 2015; 8:1526-1544. [PMID: 28788016 PMCID: PMC5507051 DOI: 10.3390/ma8041526] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [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: 12/18/2014] [Revised: 01/19/2015] [Accepted: 03/20/2015] [Indexed: 11/16/2022]
Abstract
The hemocompatibility of vascular grafts made from poly(ethylene terephthalate) (PET) is insufficient due to the rapid adhesion and activation of blood platelets that occur upon incubation with whole blood. PET polymer was treated with NHx radicals created by passing ammonia through gaseous plasma formed by a microwave discharge, which allowed for functionalization with amino groups. X-ray photoelectron spectroscopy characterization using derivatization with 4-chlorobenzaldehyde indicated that approximately 4% of the –NH2 groups were associated with the PET surface after treatment with the gaseous radicals. The functionalized polymers were coated with an ultra-thin layer of heparin and incubated with fresh blood. The free-hemoglobin technique, which is based on the haemolysis of erythrocytes, indicated improved hemocompatibility, which was confirmed by imaging the samples using confocal optical microscopy. A significant decrease in number of adhered platelets was observed on such samples. Proliferation of both human umbilical vein endothelial cells and human microvascular endothelial cells was enhanced on treated polymers, especially after a few hours of cell seeding. Thus, the technique represents a promising substitute for wet-chemical modification of PET materials prior to coating with heparin.
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Affiliation(s)
- Metod Kolar
- Jozef Stefan International Postgraduate School, Jamova 39, Ljubljana 1000, Slovenia.
| | - Miran Mozetič
- Plasma Laboratory, Institute Jozef Stefan, Jamova 39, Ljubljana 1000, Slovenia.
| | - Karin Stana-Kleinschek
- Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, Maribor 2000, Slovenia.
| | - Mirjam Fröhlich
- Department of Biochemistry, Molecular and Structural Biology, Institute Jozef Stefan, Jamova 39, Ljubljana 1000, Slovenia.
- Educell Ltd., Prevale 9, Trzin 1236, Slovenia.
| | - Boris Turk
- Department of Biochemistry, Molecular and Structural Biology, Institute Jozef Stefan, Jamova 39, Ljubljana 1000, Slovenia.
| | - Alenka Vesel
- Plasma Laboratory, Institute Jozef Stefan, Jamova 39, Ljubljana 1000, Slovenia.
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9
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Elschner T, Doliška A, Bračič M, Stana-Kleinschek K, Heinze T. Film formation of ω-aminoalkylcellulose carbamates – A quartz crystal microbalance (QCM) study. Carbohydr Polym 2015; 116:111-6. [DOI: 10.1016/j.carbpol.2014.04.101] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Revised: 04/23/2014] [Accepted: 04/30/2014] [Indexed: 10/25/2022]
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10
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Kargl R, Vorraber V, Ribitsch V, Köstler S, Stana-Kleinschek K, Mohan T. Selective immobilization and detection of DNA on biopolymer supports for the design of microarrays. Biosens Bioelectron 2015; 68:437-441. [PMID: 25618375 DOI: 10.1016/j.bios.2015.01.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/23/2014] [Revised: 01/12/2015] [Accepted: 01/16/2015] [Indexed: 10/24/2022]
Abstract
DNA immobilization for the manufacturing of microarrays requires sufficient probe density, low unspecific binding and high interaction efficiency with complementary strands that are detected from solutions. Many of these important parameters are affected by the surface chemistry and the blocking steps conducted during DNA spotting and hybridization. This work describes an alternative method to selectively immobilize probes and to detect DNA on biocompatible, hydrophilic cellulose coated supports with low unspecific binding, high selectivity and appropriate sensitivity. It takes advantage of a relatively selective adsorption of water soluble polysaccharides on a solid cellulose matrix. Single strands of DNA were conjugated to this soluble polysaccharide and subsequently micro-spotted on solid cellulose thin films that were coated on glass and polymer slides. This resulted in adsorptively bound DNA-probes that were used to detect complementary, labelled DNA strands with different lengths and sequences by hybridization. The interaction of the DNA-conjugates with cellulose surfaces and the selectivity of hybridization were investigated by a quartz crystal microbalance with dissipation monitoring (QCM-D) and fluorescence scanning. The method of non-covalent immobilization of DNA probes on an uncharged, non-reactive, hydrophilic support lowers the unspecific binding and the number of handling steps required to conduct the experiments for the detection of DNA on microarrays. Simultaneously selectivity, hybridization efficiency and detection limits are maintained.
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Affiliation(s)
- R Kargl
- Laboratory for Characterization and Processing of Polymers, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia.
| | - V Vorraber
- Institute of Chemistry, University of Graz, Heinrichstraße 28/3, 8010 Graz, Austria
| | - V Ribitsch
- Institute of Chemistry, University of Graz, Heinrichstraße 28/3, 8010 Graz, Austria
| | - S Köstler
- Materials, Sensor Systems, Institute for Surface Technologies and Photonics, Joanneum Research, Franz-Pichler-Straße 30, 8160 Weiz, Austria
| | - K Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - T Mohan
- Institute of Chemistry, University of Graz, Heinrichstraße 28/3, 8010 Graz, Austria
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11
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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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12
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Mohan T, Findenig G, Höllbacher S, Cerny C, Ristić T, Kargl R, Spirk S, Maver U, Stana-Kleinschek K, Ribitsch V. Interaction and enrichment of protein on cationic polysaccharide surfaces. Colloids Surf B Biointerfaces 2014; 123:533-41. [DOI: 10.1016/j.colsurfb.2014.09.053] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 09/20/2014] [Accepted: 09/25/2014] [Indexed: 01/31/2023]
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13
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Mohan T, Niegelhell K, Zarth CSP, Kargl R, Köstler S, Ribitsch V, Heinze T, Spirk S, Stana-Kleinschek K. Triggering protein adsorption on tailored cationic cellulose surfaces. Biomacromolecules 2014; 15:3931-41. [PMID: 25233035 DOI: 10.1021/bm500997s] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The equipment of cellulose ultrathin films with BSA (bovine serum albumin) via cationization of the surface by tailor-made cationic celluloses is described. In this way, matrices for controlled protein deposition are created, whereas the extent of protein affinity to these surfaces is controlled by the charge density and solubility of the tailored cationic cellulose derivative. In order to understand the impact of the cationic cellulose derivatives on the protein affinity, their interaction capacity with fluorescently labeled BSA is investigated at different concentrations and pH values. The amount of deposited material is quantified using QCM-D (quartz crystal microbalance with dissipation monitoring, wet mass) and MP-SPR (multi-parameter surface plasmon resonance, dry mass), and the mass of coupled water is evaluated by combination of QCM-D and SPR data. It turns out that adsorption can be tuned over a wide range (0.6-3.9 mg dry mass m(-2)) depending on the used conditions for adsorption and the type of employed cationic cellulose. After evaluation of protein adsorption, patterned cellulose thin films have been prepared and the cationic celluloses were adsorbed in a similar fashion as in the QCM-D and SPR experiments. Onto these cationic surfaces, fluorescently labeled BSA in different concentrations is deposited by an automatized spotting apparatus and a correlation between the amount of the deposited protein and the fluorescence intensity is established.
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Affiliation(s)
- Tamilselvan Mohan
- Institute for Chemistry, University of Graz , Heinrichstrasse 28, 8010 Graz, Austria
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14
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Ehmann HMA, Breitwieser D, Winter S, Gspan C, Koraimann G, Maver U, Sega M, Köstler S, Stana-Kleinschek K, Spirk S, Ribitsch V. Gold nanoparticles in the engineering of antibacterial and anticoagulant surfaces. Carbohydr Polym 2014; 117:34-42. [PMID: 25498606 DOI: 10.1016/j.carbpol.2014.08.116] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [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: 05/27/2014] [Revised: 08/22/2014] [Accepted: 08/25/2014] [Indexed: 11/17/2022]
Abstract
Simultaneous antibacterial and anticoagulant surfaces have been prepared by immobilization of engineered gold nanoparticles onto different kinds of surfaces. The gold nanoparticle core is surrounded by a hemocompatible, anticoagulant polysaccharide, 6-O chitosan sulfate, which serves as reduction and stabilizing agent for the generation of gold nanoparticles in a microwave mediated reaction. The particle suspension shows anticoagulant activity, which is investigated by aPTT and PT testing on citrated blood samples of three patients suffering from congenital or acquired bleeding disorders. The amount of nanoparticles deposited on the surfaces is quantified by a quartz crystal microbalance with dissipation unit. All gold containing surfaces exhibit excellent antimicrobial properties against the chosen model organism, Escherichia coli MG 1655 [R1-16]. Moreover, blood plasma coagulation times of the surfaces are increased after deposition of the engineered nanoparticles as demonstrated by QCM-D.
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Affiliation(s)
- Heike M A Ehmann
- Institute for Chemistry, University of Graz, Graz, Austria; Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | | | - Sascha Winter
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria
| | - Christian Gspan
- Institute for Electron Microscopy and Fine Structure Research, Centre for Electron Microscopy Graz, Graz, Austria
| | | | - Uros Maver
- Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - Marija Sega
- Center of Transfusion Medicine, University Medical Centre Maribor, 2000 Maribor, Slovenia
| | - Stefan Köstler
- Joanneum Research Materials, Institute for Surface Technologies, 8160 Weiz, Austria
| | - Karin Stana-Kleinschek
- Institute for the Engineering and Design of Materials, University of Maribor, Maribor, Slovenia
| | - Stefan Spirk
- Institute for Chemistry and Technology of Materials, Graz University of Technology, Graz, Austria; Institute for the Engineering and Design of Materials, University of Maribor, Maribor, Slovenia.
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15
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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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16
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Devetak M, Peršin Z, Stana-Kleinschek K, Maver U. Utilization of optical polarization microscopy in the study of sorption characteristics of wound dressing host materials. Microsc Microanal 2014; 20:561-565. [PMID: 24559583 DOI: 10.1017/s1431927613014086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Polarization microscopy was used for evaluation of kinetics of diclofenac sorption in three different wound dressing materials. The sorption kinetics can be evaluated by radii change and intensity of the light traveling through the fiber. The most frequently used host materials for drugs in wound dressings are alginate, polyesters such as polyethylene terephthalate, and viscose. We studied sorption of diclofenac as an example drug. Effective, but rather simple in vitro simulation of diclofenac sorption gives insight into the applicability of the mentioned materials for development of wound healing materials.
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Affiliation(s)
- Miha Devetak
- 1 CE PoliMaT, Tehnološki park 24, SI-1000 Ljubljana, Slovenia
| | - Zdenka Peršin
- 1 CE PoliMaT, Tehnološki park 24, SI-1000 Ljubljana, Slovenia
| | | | - Uroš Maver
- 1 CE PoliMaT, Tehnološki park 24, SI-1000 Ljubljana, Slovenia
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17
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Vesel A, Kolar M, Stana-Kleinschek K, Mozetic M. Etching rates of blood proteins, blood plasma and polymer in oxygen afterglow of microwave plasma. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5394] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Alenka Vesel
- Plasma Laboratory; Institute Jozef Stefan; Jamova 39 Ljubljana Slovenia
| | - Metod Kolar
- Jozef Stefan International Postgraduate School; Jamova 39 Ljubljana Slovenia
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering; University of Maribor; Smetanova 17 SI-2000 Maribor Slovenia
| | - Miran Mozetic
- Plasma Laboratory; Institute Jozef Stefan; Jamova 39 Ljubljana Slovenia
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18
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Ehmann HMA, Mohan T, Koshanskaya M, Scheicher S, Breitwieser D, Ribitsch V, Stana-Kleinschek K, Spirk S. Design of anticoagulant surfaces based on cellulose nanocrystals. Chem Commun (Camb) 2014; 50:13070-2. [DOI: 10.1039/c4cc05254d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [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]
Abstract
The anticoagulant activity of surfaces decorated with cellulose nanocrystals (CNCs) prepared via sulfuric acid hydrolysis, is explored.
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Affiliation(s)
- Heike M. A. Ehmann
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- 8010 Graz, Austria
| | | | | | - Sylvia Scheicher
- 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
| | - Stefan Spirk
- Institute for Chemistry and Technology of Materials
- Graz University of Technology
- 8010 Graz, Austria
- Institute for the Engineering and Design of Materials
- University of Maribor
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19
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Peršin Z, Maver U, Pivec T, Maver T, Vesel A, Mozetič M, Stana-Kleinschek K. Novel cellulose based materials for safe and efficient wound treatment. Carbohydr Polym 2014; 100:55-64. [DOI: 10.1016/j.carbpol.2013.03.082] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2012] [Revised: 02/27/2013] [Accepted: 03/25/2013] [Indexed: 12/25/2022]
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20
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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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21
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Peršin Z, Devetak M, Drevenšek-Olenik I, Vesel A, Mozetič M, Stana-Kleinschek K. The study of plasma's modification effects in viscose used as an absorbent for wound-relevant fluids. Carbohydr Polym 2013; 97:143-51. [DOI: 10.1016/j.carbpol.2013.04.045] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Revised: 03/25/2013] [Accepted: 04/12/2013] [Indexed: 11/24/2022]
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22
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Findenig G, Kargl R, Stana-Kleinschek K, Ribitsch V. Interaction and structure in polyelectrolyte/clay multilayers: a QCM-D study. Langmuir 2013; 29:8544-8553. [PMID: 23799242 DOI: 10.1021/la400880a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This study focuses on the investigation of the influence of the ionic strength on the internal structure, film forming behavior, and swelling properties of polyelectrolyte/clay multilayers. Layer-by-layer films were prepared with three different polyelectrolytes [polyethylenimine (PEI), polydiallyldimethylammoniumchloride (pDADMAC), and 2-hydroxy-3-trimethylammonium propyl chloride starch (HPMA starch)] in combination with laponite clay platelets on three different surfaces. All experiments were carried out at two different ionic strengths (30 mM or 500 mM NaCl). The experiments performed with strong polyelectrolytes revealed a higher film thickness and adsorbed masses of clay and polyelectrolyte at 500 mM NaCl. The films containing PEI showed different behavior and were considerably less sensitive to changes in the ionic strength. This was also reflected by the swelling behavior as demonstrated by quartz crystal microbalance with dissipation (QCM-D) measurements. Films comprising PEI showed, in contrast to the other polyelectrolytes, much lower swelling in water leading to more compact and stable films in humid environments which is important for numerous applications of LbL clay coatings.
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Affiliation(s)
- Gerald Findenig
- Division of Surface and Interface Science, Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria.
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Ribitsch D, Yebra AO, Zitzenbacher S, Wu J, Nowitsch S, Steinkellner G, Greimel K, Doliska A, Oberdorfer G, Gruber CC, Gruber K, Schwab H, Stana-Kleinschek K, Acero EH, Guebitz GM. Fusion of Binding Domains to Thermobifida cellulosilytica Cutinase to Tune Sorption Characteristics and Enhancing PET Hydrolysis. Biomacromolecules 2013; 14:1769-76. [DOI: 10.1021/bm400140u] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Doris Ribitsch
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Antonio Orcal Yebra
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Sabine Zitzenbacher
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Jing Wu
- State Key Laboratory of
Food Science and Technology, Jiangnan University, 1800 Lihu Ave., Wuxi, Jiangsu 214122, China
- School of Biotechnology
and Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, 1800 Lihu Ave.,
Wuxi, Jiangsu 214122, China
| | - Susanne Nowitsch
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Georg Steinkellner
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Katrin Greimel
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Ales Doliska
- Institute for Characterisation
and Processing of Polymers, University of Maribor, Smetanova ulica 17, 2000, Maribor, Slovenia
| | - Gustav Oberdorfer
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
- Department of Biochemistry, University of Washington, 3946 West
Stevens, Seattle, United States
| | - Christian C. Gruber
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Karl Gruber
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
- Institute of Molecular
Biosciencies, University of Graz, Humboldtstrasse 50/3, 8010, Graz, Austria
| | - Helmut Schwab
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
- Institute of Molecular
Biotechnology, Graz University of Technology, Petersgasse 14, 8010, Graz, Austria
| | - Karin Stana-Kleinschek
- Institute for Characterisation
and Processing of Polymers, University of Maribor, Smetanova ulica 17, 2000, Maribor, Slovenia
| | - Enrique Herrero Acero
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
| | - Georg M. Guebitz
- Enzymes and Polymers, Austrian Centre of Industrial Biotechnology ACIB, Petergasse
14, 8010, Graz, Austria
- Institute of Environmental
Biotechnology, University of Natural Resources and Life Sciences, Vienna, Konrad Lorenz Strasse 20,
3430 Tulln, Austria
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24
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Kurečič M, Smole MS, Stana-Kleinschek K. Use of polysaccharide based surfactants to stabilize organically modified clay particles aqueous dispersion. Carbohydr Polym 2013; 94:687-94. [DOI: 10.1016/j.carbpol.2013.01.085] [Citation(s) in RCA: 10] [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] [Received: 08/01/2012] [Revised: 10/17/2012] [Accepted: 01/15/2013] [Indexed: 11/29/2022]
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25
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Ehmann HMA, Spirk S, Doliška A, Mohan T, Gössler W, Ribitsch V, Sfiligoj-Smole M, Stana-Kleinschek K. Generalized indirect Fourier transformation as a valuable tool for the structural characterization of aqueous nanocrystalline cellulose suspensions by small angle X-ray scattering. Langmuir 2013; 29:3740-8. [PMID: 23428094 DOI: 10.1021/la303122b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Small angle X-ray scattering (SAXS) is employed to characterize the inner structure and shape of aqueous nanocrystalline cellulose suspensions using the generalized indirect Fourier transformation (GIFT). The use of the GIFT approach provides a single fitting procedure for the determination of intra- and interparticle interactions due to a simultaneous treatment of the form factor P(q) and the structure factor S(q). Moreover, GIFT allows for the determination of particle charges and polydispersity indices. As test material, aqueous nanocrystalline cellulose suspensions (aNCS) prepared by the H2SO4 route have been investigated and characterized (SAXS, dynamic light scattering, zeta potential).
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Affiliation(s)
- Heike M A Ehmann
- University Maribor, Faculty of Mechanical Engineering, Institute for Engineering Materials and Design, Laboratory for the Characterization and Processing of Polymers, Smetanova Ulica 17, 2000 Maribor, Slovenia
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26
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Coseri S, Biliuta G, Simionescu BC, Stana-Kleinschek K, Ribitsch V, Harabagiu V. Oxidized cellulose—Survey of the most recent achievements. Carbohydr Polym 2013; 93:207-15. [DOI: 10.1016/j.carbpol.2012.03.086] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Revised: 03/22/2012] [Accepted: 03/27/2012] [Indexed: 11/30/2022]
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27
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Mohan T, Ristić T, Kargl R, Doliska A, Köstler S, Ribitsch V, Marn J, Spirk S, Stana-Kleinschek K. Cationically rendered biopolymer surfaces for high protein affinity support matrices. Chem Commun (Camb) 2013; 49:11530-2. [DOI: 10.1039/c3cc46414h] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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28
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Biliuta G, Fras L, Drobota M, Persin Z, Kreze T, Stana-Kleinschek K, Ribitsch V, Harabagiu V, Coseri S. Comparison study of TEMPO and phthalimide-N-oxyl (PINO) radicals on oxidation efficiency toward cellulose. Carbohydr Polym 2013; 91:502-7. [DOI: 10.1016/j.carbpol.2012.08.047] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2012] [Revised: 08/10/2012] [Accepted: 08/14/2012] [Indexed: 11/16/2022]
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29
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Breitwieser D, Spirk S, Fasl H, Ehmann HMA, Chemelli A, Reichel VE, Gspan C, Stana-Kleinschek K, Ribitsch V. Design of simultaneous antimicrobial and anticoagulant surfaces based on nanoparticles and polysaccharides. J Mater Chem B 2013; 1:2022-2030. [DOI: 10.1039/c3tb00272a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Mohan T, Zarth CSP, Doliška A, Kargl R, Griesser T, Spirk S, Heinze T, Stana-Kleinschek K. Interactions of a cationic cellulose derivative with an ultrathin cellulose support. Carbohydr Polym 2012; 92:1046-53. [PMID: 23399127 DOI: 10.1016/j.carbpol.2012.10.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 10/07/2012] [Accepted: 10/10/2012] [Indexed: 11/19/2022]
Abstract
The adsorption behavior of cellulose-4-[N-methylammonium]butyrate chloride (CMABC) on two hydrophilic substrates is studied, namely nanometric cellulose model thin films and silicon dioxide substrates. The adsorption is quantified in dependence of electrolyte concentration and pH value using a quartz crystal microbalance with dissipation (QCM-D). In case of CMABC, at high ionic strengths (25-100 mM NaCl) high adsorption is observed at pH 7 (Δf(3): -15 to -17 Hz) while at lower ionic strengths (1-10 mM) less CMABC (Δf(3): -2 to -12 Hz) is deposited on the cellulose surfaces as indicated by the frequency changes using QCM-D. A change in pH value from 7 to 8 reveals an increase in adsorption. Atomic force microscopy shows that the coating of cellulose thin films with CMABC changes the morphology from a fibrillar to a particle like structure on the surface. The surface wettability with water increases with an increasing amount of CMABC on the surface compared to neat cellulose model films. At lower pH values (3 and 5), CMABC does not adsorb onto the cellulose model thin films. XPS is used to validate the results and to determine the nitrogen content of the surfaces. In addition, adsorption of CMABC onto another hydrophilic and negatively charged substrate, silicon dioxide coated quartz crystals, cannot be detected at different pH values and electrolyte concentrations as proven by QCM-D.
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Affiliation(s)
- Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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31
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Kargl R, Mohan T, Bračič M, Kulterer M, Doliška A, Stana-Kleinschek K, Ribitsch V. Adsorption of carboxymethyl cellulose on polymer surfaces: evidence of a specific interaction with cellulose. Langmuir 2012; 28:11440-11447. [PMID: 22759080 DOI: 10.1021/la302110a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The adsorption of carboxymethyl cellulose (CMC), one of the most important cellulose derivatives, is crucial for many scientific investigations and industrial applications. Especially for surface modifications and functionalization of materials, the polymer is of interest. The adsorption properties of CMC are dependent not only on the solutions state, which can be influenced by the pH, temperature, and electrolyte concentration, but also on the chemical composition of the adsorbents. We therefore performed basic investigation studies on the interaction of CMC with a variety of polymer films. Thin films of cellulose, cellulose acetate, deacetylated cellulose acetate, polyethylene terephthalate, and cyclo olefin polymer were therefore prepared on sensors of a QCM-D (quartz crystal microbalance) and on silicon substrates. The films were characterized with respect to the thickness, wettability, and chemical composition. Subsequently, the interaction and deposition of CMC in a range of pH values without additional electrolyte were measured with the QCM-D method. A comparison of the QCM-D results showed that CMC is favorably deposited on pure cellulose films and deacetylated cellulose acetate at low pH values. Other hydrophilic surfaces such as silicon dioxide or polyvinyl alcohol coated surfaces did not adsorb CMC to a significant extent. Atomic force microcopy confirmed that the morphology of the adsorbed CMC layers differed depending on the substrate. On hydrophobic polymer films, CMC was deposited in the form of larger particles in lower amounts whereas hydrophilic cellulose substrates were to a high extent uniformly covered by adsorbed CMC. The chemical similarity of the CMC backbone seems to favor the irreversible adsorption of CMC when the molecule is almost uncharged at low pH values. A selectivity of the cellulose CMC interaction can therefore be assumed. All CMC treated polymer films exhibited an increased hydrophilicity, which confirmed their modification with the functional molecule.
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Affiliation(s)
- Rupert Kargl
- Institute of Chemistry, Karl-Franzens-University Graz, Graz, Austria.
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Fasl H, Zemljič LF, Goessler W, Stana-Kleinschek K, Ribitsch V. Investigations Into Amphiphilic Chitosan: Properties and Availability of Original and Newly Introduced Functional Groups. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200086] [Citation(s) in RCA: 6] [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: 11/08/2022]
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33
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Zarth CSP, Zemljič LF, Čakara D, Bračič M, Pfeifer A, Stana-Kleinschek K, Heinze T. Charging Behavior and Stability of the Novel Amino Group Containing Cellulose Ester Cellulose-4-[N
-methylamino]butyrate Hydrochloride. MACROMOL CHEM PHYS 2012. [DOI: 10.1002/macp.201200057] [Citation(s) in RCA: 9] [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] [Indexed: 11/06/2022]
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Vesel A, Kolar M, Doliska A, Stana-Kleinschek K, Mozetic M. Etching of polyethylene terephthalate thin films by neutral oxygen atoms in the late flowing afterglow of oxygen plasma. SURF INTERFACE ANAL 2012. [DOI: 10.1002/sia.5064] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alenka Vesel
- Plasma laboratory; Institute Jozef Stefan; Jamova 39 Ljubljana Slovenia
| | - Metod Kolar
- Jozef Stefan International Postgraduate School; Jamova 39 Ljubljana Slovenia
| | - Ales Doliska
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering; University of Maribor; Smetanova 17 SI-2000 Maribor Slovenia
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering; University of Maribor; Smetanova 17 SI-2000 Maribor Slovenia
| | - Miran Mozetic
- Plasma laboratory; Institute Jozef Stefan; Jamova 39 Ljubljana Slovenia
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Findenig G, Leimgruber S, Kargl R, Spirk S, Stana-Kleinschek K, Ribitsch V. Creating water vapor barrier coatings from hydrophilic components. ACS Appl Mater Interfaces 2012; 4:3199-3206. [PMID: 22646312 DOI: 10.1021/am300542h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The preparation of water vapor barrier coatings composed of polyelectrolyte/clay multilayers using the layer-by-layer technique is reported. The suitability of different synthetic and renewable polyelectrolytes for the preparation of barrier coatings in combination with montmorillonite (MMT) platelets as well as the influence of the ionic strength and the number of bilayers on the coating performance was investigated. Highly hydrophilic and permeable cellulose films were used as substrate for determining the influence of the coatings on the water vapor transmission rate (WVTR). Improved barrier properties were realized by the use of polyethylene imine (PEI) or 2-hydroxy-3-trimethylammonium propyl chloride starch (HPMA starch) in combination with MMT. After the application of only 5 bilayers of PEI and MMT (thickness ∼40 nm) on each side of the cellulose film, the WVTR was significantly reduced. By the deposition of 40 PEI/MMT bilayers, the WVTR transmission rate was reduced by 68%. However, HPMA starch containing coatings led to vapor transmission reduction of up to 32% at the same number of coating steps. A strong correlation between the barrier properties of the coatings and the layer thickness was observed. The barrier properties of the coatings could be increased using higher ionic strengths. These results represent unprecedented water vapor barrier properties for coatings prepared from hydrophilic materials.
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Affiliation(s)
- Gerald Findenig
- Division of Surface and Interface Science, Institute of Chemistry, Karl-Franzens-University Graz , Heinrichstraße 28, A-8010 Graz
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Mohan T, Kargl R, Köstler S, Doliška A, Findenig G, Ribitsch V, Stana-Kleinschek K. Functional polysaccharide conjugates for the preparation of microarrays. ACS Appl Mater Interfaces 2012; 4:2743-2751. [PMID: 22515932 DOI: 10.1021/am300375m] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A method for the immobilization of functional molecules on cellulose surfaces was developed. The irreversible deposition of the water-soluble polyelectrolyte carboxymethyl cellulose (CMC) on solid cellulose surfaces was used as a basis for this immobilization. CMC was modified using aminofluorescein (AMF) as a model compound for a functional molecule. The carbodiimide mediated coupling efficiency of AMF to CMC was studied in detail, and the functional conjugates were isolated. A quartz crystal microbalance with dissipation was employed to study the immobilization of the functionalized CMC onto cellulose model films in situ. The influence of the carbodiimide concentration, the degree of substitution, and the molecular weight of CMC on the immobilization process was investigated. Atomic force microscopy was used to characterize the changes in the surface morphology of the modified cellulose films. Finally, microspotted arrays of AMF-CMC conjugates were prepared with the knowledge obtained from the basic interaction studies. The successful deposition of AMF-CMC conjugates onto cellulose surfaces was proven by fluorescence microscopy. The conjugation of functional molecules to CMC and the subsequent deposition of these products on cellulose can be seen as a versatile method to immobilize these molecules for applications in the field of microarrays and other sensor surfaces. It offers the possibility to introduce new properties on a variety of cellulosic materials.
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Affiliation(s)
- Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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Doliška A, Strnad S, Stana J, Martinelli E, Ribitsch V, Stana-Kleinschek K. In Vitro Haemocompatibility Evaluation of PET Surfaces Using the Quartz Crystal Microbalance Technique. Journal of Biomaterials Science, Polymer Edition 2012; 23:697-714. [DOI: 10.1163/092050611x559232] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Aleš Doliška
- a Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; Center of Excellence for Polymer Materials and Technologies, Tehnološki park 24, 1000 Ljubljana, Slovenia.
| | - Simona Strnad
- b Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia
| | - Jan Stana
- c Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | | | - Volker Ribitsch
- e Institute for Chemistry, University of Graz, Graz, Austria
| | - Karin Stana-Kleinschek
- f Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; Center of Excellence for Polymer Materials and Technologies, Tehnološki park 24, 1000 Ljubljana, Slovenia
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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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Mohan T, Spirk S, Kargl R, Doliška A, Ehmann HM, Köstler S, Ribitsch V, Stana-Kleinschek K. Watching cellulose grow – Kinetic investigations on cellulose thin film formation at the gas–solid interface using a quartz crystal microbalance with dissipation (QCM-D). Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2012.02.053] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mohan T, Kargl R, Doliška A, Ehmann HMA, Ribitsch V, Stana-Kleinschek K. Enzymatic digestion of partially and fully regenerated cellulose model films from trimethylsilyl cellulose. Carbohydr Polym 2012; 93:191-8. [PMID: 23465919 DOI: 10.1016/j.carbpol.2012.02.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 02/08/2012] [Accepted: 02/17/2012] [Indexed: 11/24/2022]
Abstract
Partially and fully regenerated cellulose model films from trimethylsilyl cellulose (TMSC) were prepared by a time dependent regeneration approach. These thin films were characterized with contact angle measurements and attenuated total reflectance infrared spectroscopy (ATR-IR). In order to get further insights into the completeness of the regeneration we studied the interaction of cellulase enzymes from Trichoderma viride with the cellulose films using a quartz crystal microbalance with dissipation (QCM-D). To support the results from the QCM-D experiments capillary zone electrophoresis (CZE) and atomic force microscopy (AFM) were applied. The changes in mass and energy dissipation due to the interaction of the enzymes with the substrates were correlated with the surface wettability and elemental composition of the regenerated films. The highest interaction activity between the films and the enzyme, as well as the highest cellulose degradation, was observed on fully regenerated cellulose films, but some degradation also occurred on pure TMSC films. The enzymatic degradation rate correlated well with the rate of regeneration. It was demonstrated that CZE can be used to support QCM-D data via the detection of enzyme hydrolysis products in the eluates of the QCM-D cells. Glucose release peaked at the same time as the maximum mass loss was detected via QCM-D. It was shown that a combination of QCM-D and CZE together with enzymatic digestion is a reliable method to determine the conversion rate of TMSC to cellulose. In addition QCM-D and AFM revealed that cellulase is irreversibly bound to hydrophobic TMSC surfaces, while pure cellulose is digested almost completely in the course of hydrolysis.
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Affiliation(s)
- Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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Findenig G, Spirk S, Reischl M, Kargl R, Doliška A, Stana-Kleinschek K, Ribitsch V. Adsorption of Laponite on a Cellulose Model Surface. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/masy.201000127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Doliška A, Vesel A, Kolar M, Stana-Kleinschek K, Mozetič M. Interaction between model poly(ethylene terephthalate) thin films and weakly ionised oxygen plasma. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.3769] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mohan T, Kargl R, Doliška A, Vesel A, Köstler S, Ribitsch V, Stana-Kleinschek K. Wettability and surface composition of partly and fully regenerated cellulose thin films from trimethylsilyl cellulose. J Colloid Interface Sci 2011; 358:604-10. [PMID: 21458821 DOI: 10.1016/j.jcis.2011.03.022] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 02/02/2011] [Accepted: 03/06/2011] [Indexed: 11/28/2022]
Abstract
The wettability and surface free energy (SFE) of partly and fully regenerated cellulose model surfaces from spin coated trimethylsilyl cellulose were determined by static contact angle (SCA) measurements. In order to gain detailed insight into the desilylation reaction of the surfaces the results from SCA measurements were compared with data from other surface analytical methods, namely thickness measurements, X-ray photoelectron spectroscopy (XPS) and attenuated total reflectance infrared spectroscopy (ATR-IR). Additionally, the influence of ultra high vacuum treatment (UHV) during XPS measurements on the water wettability and surface morphology of regenerated cellulose thin films was investigated. The wetting of polar and non-polar liquids increased with prolonged regeneration time, which is reflected in the higher SFE values and polarities of the films. After UHV treatment the water SCA of partly regenerated films decreases, whereas fully regenerated cellulose shows a higher water SCA. Therefore it is assumed that volatile desilylation products tend to adsorb on partly regenerated films, which strongly influences their wettability.
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Affiliation(s)
- Tamilselvan Mohan
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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Persin Z, Stana-Kleinschek K, Foster T, van Dam J, Boeriu C, Navard P. Challenges and opportunities in polysaccharides research and technology: The EPNOE views for the next decade in the areas of materials, food and health care. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.11.044] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gericke M, Doliška A, Stana J, Liebert T, Heinze T, Stana-Kleinschek K. Semi-Synthetic Polysaccharide Sulfates as Anticoagulant Coatings for PET, 1 - Cellulose Sulfate. Macromol Biosci 2011; 11:549-56. [DOI: 10.1002/mabi.201000419] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Revised: 11/23/2010] [Indexed: 11/10/2022]
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Viota J, Lopez-Viota M, Saake B, Stana-Kleinschek K, Delgado A. Organoclay particles as reinforcing agents in polysaccharide films. J Colloid Interface Sci 2010; 347:74-8. [DOI: 10.1016/j.jcis.2010.03.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/04/2010] [Accepted: 03/05/2010] [Indexed: 11/29/2022]
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Fasl H, Stana J, Stropnik D, Strnad S, Stana-Kleinschek K, Ribitsch V. Improvement of the Hemocompatibility of PET Surfaces Using Different Sulphated Polysaccharides as Coating Materials. Biomacromolecules 2010; 11:377-81. [DOI: 10.1021/bm9010084] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Fasl
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - J. Stana
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - D. Stropnik
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - S. Strnad
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - K. Stana-Kleinschek
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
| | - V. Ribitsch
- Institute for Chemistry (IfC), Rheology and Colloid Science, Karl-Franzens-University Graz, Heinrichstrasse 28, 8010 Graz, Austria, Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Maribor, Slovenia, and Faculty of Medicine, University of Maribor, Maribor, Slovenia
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Indest T, Laine J, Johansson LS, Stana-Kleinschek K, Strnad S, Dworczak R, Ribitsch V. Adsorption of Fucoidan and Chitosan Sulfate on Chitosan Modified PET Films Monitored by QCM-D. Biomacromolecules 2009; 10:630-7. [DOI: 10.1021/bm801361f] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [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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Reischl M, Köstler S, Kellner G, Stana-Kleinschek K, Ribitsch V. Oscillating streaming potential measurement system for macroscopic surfaces. Rev Sci Instrum 2008; 79:113902. [PMID: 19045898 DOI: 10.1063/1.3020699] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A method and instrumentation is described capable of streaming potential measurements of various macroscopic surfaces. It differs from other approaches due to the creation of an oscillatory flow of electrolyte solutions through or alongside the sample. This technique offers a wide range of applied flow frequency and amplitude resulting in a fast and highly accurate measurement. This enables the streaming potential detection at rather high ionic strength and in a short time regime, which allows the monitoring of adsorption processes. Streaming potential and applied pressure are measured simultaneously, together with the specific conductivity of the bulk solution, pH value, and temperature. Combining these data, the zeta potential (zeta) for many different material types (fibers, films, foils, granules, and particles) can be calculated. The apparatus comprises reliable and robust measurements, simple handling, a high degree of automation, and advanced software control. With this setup, automated pH and concentration dependent zeta-potential measurements are possible for a variety of analytes and adsorbing species (e.g., ionic strength, surfactants, polyelectrolytes, and proteins); time-resolved measurements are facilitated down to the seconds time scale. The device allows the necessary sample preparation and equilibration outside the instrument using exchangeable sample holders. This offers the opportunity of high sample throughput.
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Affiliation(s)
- Martin Reischl
- Department of Physical Chemistry, Institut fur Chemie, Karl-Franzens University Graz, Graz, Austria.
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Indest T, Laine J, Ribitsch V, Johansson LS, Stana-Kleinschek K, Strnad S. Adsorption of Chitosan on PET Films Monitored by Quartz Crystal Microbalance. Biomacromolecules 2008; 9:2207-14. [DOI: 10.1021/bm800333p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tea Indest
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
| | - Janne Laine
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
| | - Volker Ribitsch
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
| | - Leena-Sisko Johansson
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
| | - Karin Stana-Kleinschek
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
| | - Simona Strnad
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor,⊥ Smetanova 17, SI-2000 Maribor, Slovenia, Laboratory of Forest Products Chemistry, Helsinki University of Technology, Post Office Box 6300, FI-02015 HUT, Finland, and Institute of Chemistry, Rheology, and Colloid Science, Karl Franzens University,⊥ Heinrichstrasse 28, A-8010 Graz, Austria
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