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Investigation of Colored Film Indicators for the Assessment of the Occasional Radiation Exposure. Gels 2023; 9:gels9030189. [PMID: 36975638 PMCID: PMC10048619 DOI: 10.3390/gels9030189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/05/2023] Open
Abstract
Occupational radiation exposure monitoring is well-established in clinical or industrial environments with various different dosimeter systems. Despite the availability of many dosimetry methods and devices, a challenge with the occasional exposure registration, which may occur due to the spilling of radioactive materials or splitting of these materials in the environment, still exists, because not every individual will have an appropriate dosimeter at the time of the irradiation event. The aim of this work was to develop radiation-sensitive films—color-changing radiation indicators, which can be attached to or integrated in the textile. Polyvinyl alcohol (PVA)-based polymer hydrogels were used as a basis for fabrication of radiation indicator films. Several organic dyes (brilliant carmosine (BC), brilliant scarlet (BS), methylene red (MR), brilliant green (BG), brilliant blue (BB), methylene blue (MB) and xylenol orange (XiO)) were used as a coloring additives. Moreover, PVA films enriched with Ag nanoparticles (PVA-Ag) were investigated. In order to assess the radiation sensitivity of the produced films, experimental samples were irradiated in a linear accelerator with 6 MeV X-ray photons and the radiation sensitivity of irradiated films was evaluated using UV–Vis spectrophotometry method. The most sensitive were PVA-BB films indicating 0.4 Gy−1 sensitivity in low-dose (0–1 or 2 Gy) range. The sensitivity at higher doses was modest. These PVA-dye films were sensitive enough to detect doses up to 10 Gy and PVA-MR film indicated stable 33.3% decolorization after irradiation at this dose. It was found that the dose sensitivity of all PVA-Ag gel films varied from 0.068 to 0.11 Gy−1 and was dependent on the Ag additives concentration. Exchange of a small amount of water with ethanol or isopropanol caused the enhancement of radiation sensitivity in the films with the lowest AgNO3 concentration. Radiation-induced color change of AgPVA films varied between 30 and 40%. Performed research demonstrated the potential of colored hydrogel films in their applications as indicators for the assessment of the occasional radiation exposure.
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Lomovskoy VA, Suvorova OV, Abaturova NA, Lomovskaya NY, Kulyukhin SA, Pavlov YS. Effect of Ionizing Irradiation on the Segmental Mobility of Polyvinyl Alcohol Macromolecular Chains. HIGH ENERGY CHEMISTRY 2022. [DOI: 10.1134/s0018143922050101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Piechocki K, Koynov K, Piechocka J, Chamerski K, Filipecki J, Maczugowska P, Kozanecki M. Small molecule diffusion in poly-(olygo ethylene glycol methacrylate) based hydrogels studied by fluorescence correlation spectroscopy. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4
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Merkis M, Puišo J, Adliene D, Laurikaitiene J. Development and Characterization of Silver Containing Free Standing Polymer FILMS for Dosimetry Applications. Polymers (Basel) 2021; 13:polym13223925. [PMID: 34833224 PMCID: PMC8623515 DOI: 10.3390/polym13223925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/05/2021] [Accepted: 11/08/2021] [Indexed: 12/04/2022] Open
Abstract
Polymer gels and films, due to their near equivalence to biological tissue, are amongst the most promising future dosimetry tools for medical applications. The application of polymer dose gels is limited by the sensitivity of dose readout methods and dose gel properties. It is a challenge to find suitable dosimeters for registration of doses delivered to the target by orthovoltage therapy units. The application of metal-particle-enriched polymer composites for dose registration in X-ray therapy might be an elegant solution, especially if recent dose-reading technologies exploring advantages of different physical phenomena are involved. In this work, X-rays from the orthovoltage therapy range were used for the irradiation of experimental samples. In addition, radiation-induced processes of formation of silver nanoparticles in AgNO3–PVA gels and in free standing AgNO3PVA films, also containing some additional solvents, namely glycerol, ethanol, and isopropanol, have been investigated, with the aim to apply the developed composites for medical dosimetry purposes. A simple and environmentally friendly method for the formation of free-standing AgPVA films at room temperature was proposed and realized for preparing AgPVA films for investigation. Radiation-induced synthesis of silver nanoparticles in AgPVA composites was investigated, analyzing LPSR-based UV-VIS spectral changes to the irradiated films with respect to irradiation doses, and dose-related tendencies were also evaluated. It was shown that AgPVA films were more sensitive for detection of doses from the interval 0–1.0 Gy, thus indicating potential application of AgPVA films for dosimetry purposes.
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Affiliation(s)
| | - Judita Puišo
- Correspondence: (J.P.); (D.A.); Tel.: +370-61004812 (J.P.)
| | - Diana Adliene
- Correspondence: (J.P.); (D.A.); Tel.: +370-61004812 (J.P.)
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5
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Imanishi A, Kimura A, Miyamoto H, Hiroki A, Nagasawa N, Yoshii F, Taguchi M. Human organ phantoms for catheterization using the radiation crosslinking technique. J Appl Polym Sci 2021. [DOI: 10.1002/app.50818] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ayaka Imanishi
- Medical Technology Park North Square Japan Lifeline Co., Ltd. Saitama Japan
| | - Atsushi Kimura
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology Takasaki Japan
| | - Hisao Miyamoto
- Medical Technology Park North Square Japan Lifeline Co., Ltd. Saitama Japan
| | - Akihiro Hiroki
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology Takasaki Japan
| | - Naotsugu Nagasawa
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology Takasaki Japan
| | - Fumio Yoshii
- Medical Technology Park North Square Japan Lifeline Co., Ltd. Saitama Japan
| | - Mitsumasa Taguchi
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology Takasaki Japan
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Zboray S, Efimenko K, Jones JL, Genzer J. Functional Gels Containing Hydroxamic Acid Degrade Organophosphates in Aqueous Solutions. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Steven Zboray
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Kirill Efimenko
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Jacob L. Jones
- Department of Materials Science & Engineering, Carolina State University, Raleigh, North Carolina 27695-7907, United States
| | - Jan Genzer
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
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Sasaki S, Omata S, Murakami T, Nagasawa N, Taguchi M, Suzuki A. Effect of Gamma Ray Irradiation on Friction Property of Poly(vinyl alcohol) Cast-Drying on Freeze-Thawed Hybrid Gel. Gels 2018; 4:E30. [PMID: 30674806 PMCID: PMC6209256 DOI: 10.3390/gels4020030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 03/26/2018] [Accepted: 03/27/2018] [Indexed: 11/16/2022] Open
Abstract
Poly(vinyl alcohol) (PVA) is a biocompatible polymer with low toxicity. It is possible to prepare physically cross-linked PVA gels having hydrogen bonds without using a cross-linking agent. The newly reported physically cross-linked PVA cast-drying (CD) on freeze-thawed (FT) hybrid gel has an excellent friction property, which is expected to be applied as a candidate material for artificial cartilage. Gamma ray sterilization for clinical applications usually causes additional chemical cross-linking and changes physical properties of gels. In this study, CD on FT hybrid gels were irradiated using gamma rays at a different dose rate and irradiance. The results showed the optimized irradiation conditions for gamma irradiated gels to retain excellent friction characteristics.
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Affiliation(s)
- Saori Sasaki
- Research Center for Advanced Biomechanics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
- Institute for Material Chemistry and Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
| | - Seiji Omata
- Research Center for Advanced Biomechanics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
- Department of Micro-Nano Mechanical Science and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
| | - Teruo Murakami
- Research Center for Advanced Biomechanics, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
- Faculty of Fukuoka Medical Technology, Teikyo University, 6-22 Misaki-machi, Omuta 836-8505, Japan.
| | - Naotsugu Nagasawa
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Watanuki 1233, Takasaki, Gunma 370-1292, Japan.
| | - Mitsumasa Taguchi
- Takasaki Advanced Radiation Research Institute, National Institutes for Quantum and Radiological Science and Technology, Watanuki 1233, Takasaki, Gunma 370-1292, Japan.
| | - Atsushi Suzuki
- Research Institute of Environment and Information Sciences, Yokohama National University, 79-7 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan.
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8
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Gamma irradiation induced in situ synthesis of lead sulfide nanoparticles in poly(vinyl alcohol) hydrogel. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2016.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Fan L, Yang H, Yang J, Peng M, Hu J. Preparation and characterization of chitosan/gelatin/PVA hydrogel for wound dressings. Carbohydr Polym 2016; 146:427-34. [DOI: 10.1016/j.carbpol.2016.03.002] [Citation(s) in RCA: 256] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 03/01/2016] [Accepted: 03/03/2016] [Indexed: 01/17/2023]
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10
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Kudo K, Ishida J, Syuu G, Sekine Y, Ikeda-Fukazawa T. Structural changes of water in poly(vinyl alcohol) hydrogel during dehydration. J Chem Phys 2014; 140:044909. [DOI: 10.1063/1.4862996] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Narita T, Mayumi K, Ducouret G, Hébraud P. Viscoelastic Properties of Poly(vinyl alcohol) Hydrogels Having Permanent and Transient Cross-Links Studied by Microrheology, Classical Rheometry, and Dynamic Light Scattering. Macromolecules 2013. [DOI: 10.1021/ma400600f] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Tetsuharu Narita
- Laboratoire PPMD-SIMM, UPMC-ESPCI ParisTech-CNRS UMR7615, 10 rue Vauquelin,
75005 Paris, France
| | - Koichi Mayumi
- Laboratoire PPMD-SIMM, UPMC-ESPCI ParisTech-CNRS UMR7615, 10 rue Vauquelin,
75005 Paris, France
| | - Guylaine Ducouret
- Laboratoire PPMD-SIMM, UPMC-ESPCI ParisTech-CNRS UMR7615, 10 rue Vauquelin,
75005 Paris, France
| | - Pascal Hébraud
- IPCMS/CNRS UMR 7504, 23 rue du Loess PB43 67034 Strasbourg Cedex, France
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12
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Gupta A, Upadhyay NK, Parthasarathy S, Rajagopal C, Roy PK. Nitrofurazone-loaded PVA-PEG semi-IPN for application as hydrogel dressing for normal and burn wounds. J Appl Polym Sci 2012. [DOI: 10.1002/app.38594] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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13
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Bodugoz-Senturk H, Oral E, Choi J, Macias C, Muratoglu OK. Molecular weight effect on theta-gel formation in poly(vinyl alcohol)-poly(ethylene glycol) mixtures. J Appl Polym Sci 2012. [DOI: 10.1002/app.36223] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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14
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Yuan J, Mo H, Wang M, Li L, Zhang J, Shen J. Reactive electrospinning of poly(vinyl alcohol) nanofibers. J Appl Polym Sci 2011. [DOI: 10.1002/app.33889] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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15
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Otsuka E, Sugiyama M, Suzuki A. Network Microstructure of PVA Cast Gels Observed by SAXS Measurements. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/247/1/012043] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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16
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Otsuka E, Kudo S, Sugiyama M, Suzuki A. Effects of microcrystallites on swelling behavior in chemically crosslinked poly(vinyl alcohol) gels. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22161] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Krahl F, Arndt KF. Synthesis of Microgels by Radiation Methods. CHEMICAL DESIGN OF RESPONSIVE MICROGELS 2010. [DOI: 10.1007/12_2010_76] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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18
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Otsuka E, Suzuki A. A simple method to obtain a swollen PVA gel crosslinked by hydrogen bonds. J Appl Polym Sci 2009. [DOI: 10.1002/app.30546] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Swelling–shrinking behaviors of poly(N-isopropylacrylamide) and poly(N-n-propylacrylamide) gels prepared by chemical and radiation crosslinking methods. Colloid Polym Sci 2008. [DOI: 10.1007/s00396-008-1969-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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El Salmawi KM. Application of Polyvinyl Alcohol (PVA)/Carboxymethyl Cellulose (CMC) Hydrogel Produced by Conventional Crosslinking or by Freezing and Thawing. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2007. [DOI: 10.1080/10601320701285045] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Thermal properties of radiolytically synthesized PVA/Ag nanocomposites. HEMIJSKA INDUSTRIJA 2007. [DOI: 10.2298/hemind0703129k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The radiolytic method was used to synthesize two types of nanocomposites with silver, PVA/Ag by film casting and PVA hydrogel/Ag nanocomposites. This method is particularly suitable for generating metal nanoparticles in solution. The radiolytic species (solvated electrons and secondary radicals) exhibit strong reducing properties such that metal ions are reduced at each encounter. Metal atoms then tend to grow into larger clusters. It was found that solid or swollen polymers are able to stabilize small crystallites against spontaneous growth via aggregation. Using differential scanning calorimetry (DSC), the melting behavior and kinetics of the PVA/Ag nanocomposites were investigated and compared to those of pure PVA. The melting as well as crystallization behavior of polymers is crucial because it governs the thermal properties, impact resistance and stress strain properties. Understanding the melting behavior is significant not only to tailor the properties of nanocomposites but to investigate the interactions between the constituents. The DSC curves of pure PVA and prepared nanocomposites show only one melting peak between 175 and 230?C, indicating that the melting behavior of these two systems are analogous. In both cases, with increasing heating rate, the melting peak shifts to a higher temperature, but with increasing Ag content the peak melting temperature is lower. When specimens are heated at high heating rate, the motion of PVA molecular chains cannot follow the heating temperature on time due to the influence of heat hysteresis, which leads to a higher peak melting temperature. When Ag nanoparticles are added they increase the heat transfer among the PVA molecular chains decreasing the melting temperature. The Ag content is a major factor affecting the degree of crystallinity. It was observed that at low nanofiller content, up to the 0.5 wt%, the degree of crystallinity of the nanocomposites increased, while at a higher content the crystallization was retarded. The half time of melting is non-linearly dependent on the amount of nanofiller. In the range from 0.25 to 1 wt% Ag it slightly increases, because at a low Ag content the nanoparticles act as a heterogeneous nucleation agent during the crystallization process. For large amounts of nanofiller, the half time of melting is markedly higher than for pure PVA. At a higher Ag content, the nanoparticles act as a barrier that restricts the thermal motion of PVA molecular chains and the half time of complete melting increases. The significantly lower melting activation energy of the nanocomposites with high amount of nanofiller compared to pure PVA, calculated by the Kissinger method, indicated that nanoparticles reduced the heat barrier for the melting process. .
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Katta JK, Marcolongo M, Lowman A, Mansmann KA. Friction and wear behavior of poly(vinyl alcohol)/poly(vinyl pyrrolidone) hydrogels for articular cartilage replacement. J Biomed Mater Res A 2007; 83:471-9. [PMID: 17492689 DOI: 10.1002/jbm.a.31238] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Many hydrogels have been proposed as articular cartilage replacements as an alternative to partial or total joint replacements. In the current study, poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP) hydrogels were investigated as potential cartilage replacements by investigating their in vitro wear and friction characteristics in a pin-on-disk setup. A three-factor variable-level experiment was designed to study the wear and friction characteristics of PVA/PVP hydrogels. The three different factors studied were (a) polymer content of PVA/PVP hydrogels, (b) load, and (c) effect of lubricant. Twelve tests were conducted, with each lasting 100,000 cycles against Co-Cr pins. The average coefficient of friction for synovial fluid lubrication was a low 0.035 compared with 0.1 for bovine serum lubrication. Frictional behavior of PVA/PVP hydrogels did not follow Amonton's law of friction. Wear of the hydrogels was quantified by measuring their dry masses before and after the tests. Higher polymer content significantly reduced the wear of hydrogel samples with 15% PVA/PVP samples, showing an average dry polymer loss of 4.74% compared with 6.05% for 10% PVA/PVP samples. A trend change was observed in both the friction and wear characteristics of PVA/PVP hydrogels at 125 N load, suggesting a transition in the lubricating mechanism at the pin-hydrogel interface at the critical 125 N load.
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Affiliation(s)
- Jayanth K Katta
- School of Biomedical Engineering, Drexel University, 32nd and Chestnut Streets, Philadelphia, Pennsylvania 19104, USA
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23
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Krklješ A, Nedeljković J, Kačarević-Popović Z. Fabrication of Ag-PVA hydrogel nanocomposite by γ-irradiation. Polym Bull (Berl) 2006. [DOI: 10.1007/s00289-006-0593-4] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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24
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Abdelaal MY, Abdel-Razik EA, Abdel-Bary EM, El-Sherbiny IM. Chitosan-based interpolymeric pH-responsive hydrogels forin vitro drug release. J Appl Polym Sci 2006. [DOI: 10.1002/app.25154] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Schmidt T, Janik I, Kadłubowski S, Ulański P, Rosiak JM, Reichelt R, Arndt KF. Pulsed electron beam irradiation of dilute aqueous poly(vinyl methyl ether) solutions. POLYMER 2005. [DOI: 10.1016/j.polymer.2005.07.077] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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26
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Nurkeeva ZS, Mun GA, Dubolazov AV, Khutoryanskiy VV. pH Effects on the Complexation, Miscibility and Radiation-Induced Crosslinking in Poly(acrylic acid)-Poly(vinyl alcohol) Blends. Macromol Biosci 2005; 5:424-32. [PMID: 15889388 DOI: 10.1002/mabi.200400200] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The effect of pH on the complexation of poly(acrylic acid) with poly(vinyl alcohol) in aqueous solution, the miscibility of these polymers in the solid state and the possibility for crosslinking the blends using gamma radiation has been studied. It is demonstrated that the complexation ability of poly(vinyl alcohol) with respect to poly(acrylic acid) is relatively low in comparison with some other synthetic non-ionic polymers. The precipitation of interpolymer complexes was observed below the critical pH of complexation (pH(crit1)), which characterizes the transition between a compact hydrophobic polycomplex and an extended hydrophilic interpolymer associate. Films prepared by casting from aqueous solutions at different pH values exhibited a transition from miscibility to immiscibility at a certain critical pH, pH(crit2), above which hydrogen bonding is prevented. It is shown here that gamma radiation crosslinking of solid blends is efficient and only results in the formation of hydrogel films for blends prepared between pH(crit1) and pH(crit2). The yield of the gel fraction and the swelling properties of the films depended on the absorbed radiation dose and the polymer ratio. [Diagram: see text] SEM image of an equimolar PAA-PVA blend cast from a pH 4.6 solution.
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Affiliation(s)
- Zauresh S Nurkeeva
- Kazakh National University, Department of Chemical Physics and Macromolecular Chemistry, Karasai Batyra 95, 480012 Almaty, Kazakhstan
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27
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Gholap SG, Jog JP, Badiger MV. Synthesis and characterization of hydrophobically modified poly(vinyl alcohol) hydrogel membrane. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.06.032] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Querner C, Schmidt T, Arndt KF. Characterization of structural changes of poly(vinyl methyl ether) gamma-irradiated in diluted aqueous solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:2883-2889. [PMID: 15835168 DOI: 10.1021/la030349a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An aqueous deoxygenated dilute PVME solution (cP = 0.5 mass %) was irradiated with gamma-rays at different radiation doses (D = 0.2-10 kGy). At these concentrations and doses contracted molecules are formed but no macroscopic networks. For the analysis of the structural changes, the irradiated samples were analyzed by size exclusion chromatography (SEC) with a triple detector system, static light scattering, and viscometry. SEC measurements necessitate for the application of the universal calibration principle the knowledge of the Kuhn-Mark-Houwink (KMH) parameters. To obtain these parameters commercially available poly(vinyl methyl ether) was fractionated and analyzed by the same means. We found at 30 degrees C a KMH relationship to [eta] = 0.0226 (mL/g) x Mw(0.67) in THF. We observed an increase in molar masses without any significant structural changing for D < 0.5 kGy. With increasing radiation dose, the intramolecular cross-linking reaction becomes more and more important. The results of viscosity measurements show a slight increase in contraction for 1.0 kGy. For irradiation dose higher than D > 1.5 kGy, a strong contraction occurs. For D > 5.0 kGy, the favored intramolecular reactions lead to the formation of microgels.
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Affiliation(s)
- Claudia Querner
- Institut für Physikalische Chemie und Elektrochemie, Technische Universität Dresden, D-01062 Dresden, Germany
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Cooper-White JJ, Hill DJT. Viscoelasticity of radiation-formed PVA/PVP hydrogel. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2003; 13:1007-20. [PMID: 12462460 DOI: 10.1163/156856202760319153] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The dynamic rheological behaviour of gamma-irradiated 12.8 wt% poly(vinyl alcohol) (PVA), 12.8 wt% poly(vinyl pyrrolidone) (PVP), and a blend of 8 wt% PVA and 4.8 wt% PVP aqueous solutions have been studied pre- and post-gelation. The non-irradiated solutions displayed rheological behaviour typical of dilute to semi-dilute polymer solutions, with the complex viscosity being independent of the frequency and shear rate (i.e. Newtonian behaviour) over the range of frequencies tested and the loss modulus G"(omega) and storage modulus G'(omega) being nearly proportional to omega and omega2, respectively. After a set of doses of gamma-radiation, the magnitudes of the dynamic moduli G'(omega) and G"(omega) increased as the absorbed dose increased, with notable differences between the two homopolymers and the blend. The stages of gelation were effectively monitored by means of dynamic rheological measurements, allowing the possible mechanisms of network formation to be elucidated. The doses required for gelation of the PVA, PVP, and blend samples, determined on the basis of the Winter and Chambon criteria for gelation, were found to be 12 kGy for the 12.8 wt% PVA, 4 kGy for the 12.8 wt% PVP, and 5 kGy for the 8 wt% PVA/4.8 wt% PVP solutions. The unexpected lower gelation dose demonstrated by the blend sample, compared with predictions based on the blend composition, and the associated gelation mechanism are also discussed.
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Nho YC, Park KR. Preparation and properties of PVA/PVP hydrogels containing chitosan by radiation. J Appl Polym Sci 2002. [DOI: 10.1002/app.10812] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Schmitz KS, Wang B, Kokufuta E. Mechanism of Microgel Formation via Cross-Linking of Polymers in Their Dilute Solutions: Mathematical Explanation with Computer Simulations. Macromolecules 2001. [DOI: 10.1021/ma010956+] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wang B, Mukataka S, Kokufuta E, Kodama M. The influence of polymer concentration on the radiation-chemical yield of intermolecular crosslinking of poly(vinyl alcohol) by γ-rays in deoxygenated aqueous solution. Radiat Phys Chem Oxf Engl 1993 2000. [DOI: 10.1016/s0969-806x(00)00188-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wang B, Mukataka S, Kokufuta E, Ogiso M, Kodama M. Viscometric, light scattering, and size-exclusion chromatography studies on the structural changes of aqueous poly(vinyl alcohol) induced by ?-ray irradiation. ACTA ACUST UNITED AC 2000. [DOI: 10.1002/(sici)1099-0488(20000101)38:1<214::aid-polb24>3.0.co;2-g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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