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Tegopoulos SN, Papagiannopoulos A, Kyritsis A. Hydration effects on thermal transitions and molecular mobility in Xanthan gum polysaccharides. Phys Chem Chem Phys 2024; 26:3462-3473. [PMID: 38205826 DOI: 10.1039/d3cp04643e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
In this work, the xanthan gum (XG) polysaccharide is studied over a wide range of temperatures and water fractions 0 ≤ hw ≤ 0.70 (on a wet basis) by employing differential scanning calorimetry (DSC) and broadband dielectric spectroscopy (BDS). The investigation reveals that the critical water fraction for ice formation is about 0.35. Glass transition temperature (Tg) was determined through calorimetry experiments for all the samples studied. Water acts as a strong plasticizer, i.e., decreasing Tg, for water fractions up to about 0.35. A secondary (local) relaxation process is recorded in both dry and hydrated samples, which is sensitive to the presence of water molecules. This fact indicates that this process originates due to the orientation of small polar groups of the side chain, or/and due to the local main chain dynamics. Two types of long-range charge transport processes were resolved. The first is related to the conductive paths being formed via bulk-like ice structures (at high hydration levels), whereas the second can be attributed to proton mobility via the hydrogen bond (HB) network of non-freezing water existing in XG. Interestingly, this process is exactly the same in all the hydrated samples with hw > 0.25. With respect to the sample with hw = 0.27, a Vogel-Tammann-Fulcher (VTF)-like polarization process has also been recorded which seems to be related to long-range charge mobility via interconnected water clusters. As far as we are aware, this is the first time that XG is studied in terms of glass transition and molecular mobility over a wide range of hydration levels combining DSC and BDS techniques.
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Affiliation(s)
- Sokratis N Tegopoulos
- Physics Department, National Technical University of Athens, Iroon Polytechneiou 9, Zografou Campus, Athens, 15780, Greece.
| | - Aristeidis Papagiannopoulos
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635, Athens, Greece
| | - Apostolos Kyritsis
- Physics Department, National Technical University of Athens, Iroon Polytechneiou 9, Zografou Campus, Athens, 15780, Greece.
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2
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Vijayakumar B, Takatsuka M, Sasaki K, Kita R, Shinyashiki N, Yagihara S, Rathnasabapathy S. Dielectric relaxation of ice in a partially crystallized poly( N-isopropylacrylamide)microgel suspension compared to other partially crystalized polymer-water mixtures. Phys Chem Chem Phys 2023; 25:22223-22231. [PMID: 37566434 DOI: 10.1039/d3cp02116e] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
A broadband dielectric spectroscopy study was conducted on a partially crystallized 10 wt% poly(N-isopropylacrylamide) [PNIPAM] microgel aqueous suspension to investigate the dielectric relaxation of ice in microgel suspensions. The measurements covered a frequency range of 10 mHz to 10 MHz and at temperatures ranging from 123 K to 273 K. Two distinct relaxation processes were observed at specific frequencies below the melting temperature. One is associated with the combination of the local chain motion of PNIPAM and interfacial polarization in the uncrystallized phase, while another is associated with ice. To understand the temperature-dependent behaviour of the ice relaxation process, the relaxation time of ice was compared with those observed in other frozen polymer water mixtures, including gelatin, poly-vinylpyrrolidone (PVP), and bovine serum albumin (BSA). For concentrations ≥ 10 wt%, the temperature dependence of the relaxation time of ice was found to be independent. Therefore, the study primarily focused on the 10 wt% data for easier comprehension of the ice relaxation process. It was found that the microgel and globular protein BSA had no significant effect on ice crystallization, while gelatin slowed down the crystallization process, and PVP accelerated it. To discuss the mechanism of the dielectric relaxation of ice, the trap-controlled proton transport model developed by Khamzin et al. [Chem. Phys., 2021, 541, 111040.] was employed. The model was used to discuss the dynamic heterogeneity of ice observed in this investigation, distinguishing it from the spatial heterogeneity of ice commonly discussed.
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Affiliation(s)
- Balachandar Vijayakumar
- Department of Physics, Sathyabama Institute of Science and Technology, Chennai-600119, India. drrskumar@
- Centre for Nanoscience and Nanotechnology, Sathyabama Institute of Science and Technology, Chennai-600119, India
| | - Masanobu Takatsuka
- Graduate School of Science and Technology, Tokai University, Kanagawa 259-1292, Japan
| | - Kaito Sasaki
- Department of Physics, Tokai University, Kanagawa 259-1292, Japan.
- Micro/Nano Technology Centre, Tokai University, Kanagawa 259-1292, Japan
| | - Rio Kita
- Department of Physics, Tokai University, Kanagawa 259-1292, Japan.
- Micro/Nano Technology Centre, Tokai University, Kanagawa 259-1292, Japan
| | - Naoki Shinyashiki
- Department of Physics, Tokai University, Kanagawa 259-1292, Japan.
- Micro/Nano Technology Centre, Tokai University, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- Department of Physics, Tokai University, Kanagawa 259-1292, Japan.
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3
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Yang XD, Chen W, Ren Y, Chu LY. Exploring dielectric spectra of polymer through molecular dynamics simulations. MOLECULAR SIMULATION 2022. [DOI: 10.1080/08927022.2022.2083122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xue-Dan Yang
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan, People's Republic of China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, People's Republic of China
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Wei Chen
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, Liaoning, People's Republic of China
| | - Ying Ren
- State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, People's Republic of China
- Innovation Academy for Green Manufacture, Chinese Academy of Sciences, Beijing, People's Republic of China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan, People's Republic of China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan, People's Republic of China
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4
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Tsukahara T, Sasaki K, Kita R, Shinyashiki N. Dielectric relaxations of ice and uncrystallized water in partially crystallized bovine serum albumin-water mixtures. Phys Chem Chem Phys 2022; 24:5803-5812. [PMID: 35213680 DOI: 10.1039/d1cp05679d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To investigate the dielectric relaxations of ice in low-concentration protein-water mixtures, broadband dielectric spectroscopy measurements were performed on partially crystallized bovine serum albumin (BSA)-water mixtures with BSA concentrations of 1-10 wt% at temperatures in the range of 123-298 K. The temperature dependence of the relaxation time of ice observed in all these mixtures changes twice at TC1 (∼240 K) and TC2 (200-160 K) (TC1 > TC2), i.e., at which the apparent activation energy, Ea, changes. Below 200 K, the relaxation of ice separates as 3-4 relaxations with different TC2 and Ea values. The presence of the multiple ice relaxations is the same as that observed for the gelatin-water mixtures (T. Yasuda, K. Sasaki, R. Kita, N. Shinyashiki and S. Yagihara, J. Phys. Chem. B, 2017, 121, 2896), but the concentration dependences of TC1 and TC2 are different. The relaxation interpreted to be due to uncrystallized water in 20 wt% and 40 wt% BSA-water mixtures reported (N. Shinyashiki, W. Yamamoto, A. Yokoyama, T. Yoshinari, S. Yagihara, R. Kita, K. L. Ngai and S. Capaccioli, J. Phys. Chem. B, 2009, 113, 14448) was re-examined and concluded to be due to one of the multiple relaxations of ice.
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Affiliation(s)
- Tatsuya Tsukahara
- Department of Physics, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan.
| | - Kaito Sasaki
- Department of Physics, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan. .,Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan
| | - Rio Kita
- Department of Physics, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan. .,Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan
| | - Naoki Shinyashiki
- Department of Physics, School of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan. .,Micro/Nano Technology Center, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa, Japan
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5
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Czaderna-Lekka A, Kozanecki M, Matusiak M, Kadlubowski S. Phase transitions of poly(oligo(ethylene glycol) methyl ether methacrylate)-water systems. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123247] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Fujii M, Sasaki K, Matsui Y, Inoue S, Kita R, Shinyashiki N, Yagihara S. Dynamics of Uncrystallized Water, Ice, and Hydrated Polymer in Partially Crystallized Poly(vinylpyrrolidone)-Water Mixtures. J Phys Chem B 2020; 124:1521-1530. [PMID: 32009404 DOI: 10.1021/acs.jpcb.9b11552] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we investigated the cooperative molecular dynamics of poly(vinylpyrrolidone) (PVP), ice, and uncrystallized water (UCW) in partially crystallized PVP-water mixtures by means of broadband dielectric spectroscopy. Three relaxation processes, denoted I, II, and III, were observed at temperatures ranging from immediately below the crystallization temperature (Tc) to approximately 200 K. At temperatures of 173-193 K, processes I and II cannot be distinguished. Below 168 K, process II separates into two processes: process IV at higher frequencies and process V at lower frequencies. Process I contributes to process V. In partially crystallized mixtures, process I originates from UCW in an uncrystallized phase with PVP. Process II is attributed to ice in the mixture, with a relaxation time that is 2 orders of magnitude smaller than that of pure ice. The concentration dependence of the strength of process II and the relaxation time relative to that of ice in bovine serum albumin (BSA)-water and gelatin-water mixtures strongly support this conclusion. Observation of processes IV and V indicates the presence of multiple ice relaxation processes. Process III is attributed to the α process of PVP in the uncrystallized phase in 40 and 50 wt % PVP mixtures. For mixtures with 30 wt % PVP or less, process III is attributed not only to the α process of PVP but also to interfacial polarization.
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Affiliation(s)
- Mitsuki Fujii
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Kaito Sasaki
- Micro/Nano Technology Center , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Yurika Matsui
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Shiori Inoue
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Rio Kita
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan.,Micro/Nano Technology Center , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Naoki Shinyashiki
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan.,Micro/Nano Technology Center , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
| | - Shin Yagihara
- Department of Physics, School of Science , Tokai University , 4-1-1 Kitakaname , Hiratuka-shi , Kanagawa 259-1292 , Japan
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7
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Cui Y, Gao S, Zhang R, Cheng L, Yu J. Study on the Moisture Absorption and Thermal Properties of Hygroscopic Exothermic Fibers and Related Interactions with Water Molecules. Polymers (Basel) 2020; 12:E98. [PMID: 31947923 PMCID: PMC7023626 DOI: 10.3390/polym12010098] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 12/23/2019] [Accepted: 01/01/2020] [Indexed: 11/24/2022] Open
Abstract
The aim of this paper is to study the hygroscopic behavior of hygroscopic exothermic fiber-based materials and to obtain a better understanding of the thermal performance of these fibers during the moisture absorption process. The temperature distribution of different kinds of hygroscopic exothermic fibers in the process of moisture absorption, observed by infrared camera, demonstrated two types of heating performance of these fibers, which might be related to its hygroscopic behavior. Based on the sorption isotherms, a Guggenheim-Anderson-de Boer (GAB) multi-layer adsorption model was selected as the optimal moisture absorption fitting model to describe the moisture absorption process of these fibers, which illustrated that water sorption capacity and the water-fiber/water-water interaction had a significant influence on its heating performance. The net isosteric heats of sorption decreased with an increase of moisture content, which further explained the main factor affecting the heat dissipation of fibers under different moisture contents. The state of adsorbed water and water vapor interaction on the fiber surface were studied by simultaneous thermal analysis (TGA-DSC) measurement. The percentage of bound and unbound water formation at low and high humidity had a profound effect on the thermal performance of fibers. It can therefore be concluded that the content of tightly bound water a strong water-fiber interaction was the main factor affecting the heating performance of fibers at low moisture content, and the content of loosely bound water reflected that water sorption capacity was the main factor affecting the heating performance of fibers at high moisture content. This was further proven by the heat of desorption.
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Affiliation(s)
- Yi Cui
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (Y.C.); (S.G.); (L.C.)
| | - Shuyi Gao
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (Y.C.); (S.G.); (L.C.)
| | - Ruiyun Zhang
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (Y.C.); (S.G.); (L.C.)
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China;
| | - Longdi Cheng
- Key Laboratory of Textile Science and Technology, Ministry of Education, College of Textiles, Donghua University, Shanghai 201620, China; (Y.C.); (S.G.); (L.C.)
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai 201620, China;
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8
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9
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Kripotou S, Zafeiris K, Culebras-Martínez M, Gallego Ferrer G, Kyritsis A. Dynamics of hydration water in gelatin and hyaluronic acid hydrogels. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2019; 42:109. [PMID: 31444585 DOI: 10.1140/epje/i2019-11871-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 07/18/2019] [Indexed: 06/10/2023]
Abstract
We employed broadband dielectric spectroscopy (BDS), for the investigation of the water dynamics in partially hydrated hyaluronic acid (HA), and gelatin (Gel), enzymatically crosslinked hydrogels, in the water fraction ranges [Formula: see text]. Our results indicate that at low hydrations ([Formula: see text]), where the dielectric response of the hydrogels is identical during cooling and heating, water plasticizes strongly the polymeric matrix and is organized in clusters giving rise to [Formula: see text]-process, secondary water relaxation and to an additional slower relaxation process. This later process has been found to be related with the dc charge conductivity and can be described in terms of the conduction current relaxation mechanism. At slightly higher hydrations, however, always below the hydration level where ice is formed during cooling, we have recorded in HA hydrogel a strong water dielectric relaxation process, [Formula: see text], which has Arrhenius-like temperature dependence and large time scale resembling relaxation processes recorded in bulk low density amorphous solid water structures. This relaxation process shows a strong-to-fragile transition at [Formula: see text]C and our data suggest that the VTF-like process recorded at [Formula: see text]C is controlled by the same molecular process like long range charge transport. In addition, our data imply that the crossover temperature is related with the onset of structural rearrangements (increase in configurational entropy) of the macromolecules. In partially crystallized hydrogels ([Formula: see text]) HA exhibits at low temperatures the ice dielectric process consistent with the bulk hexagonal ice, whereas Gel hydrogel exhibits as main low temperature process a slow relaxation process that refers to open tetrahedral structures of water similar to low density amorphous ice structures and to bulk cubic ice. Regarding the water secondary relaxation processes, we have shown that the [Formula: see text]-process and the [Formula: see text] process are activated in water hydrogen bond networks with different structures.
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Affiliation(s)
- Sotiria Kripotou
- National Technical University of Athens, Physics Department, Iroon Polytechneiou 9, Zografou Campus, 15780, Athens, Greece
| | - Konstantinos Zafeiris
- National Technical University of Athens, Physics Department, Iroon Polytechneiou 9, Zografou Campus, 15780, Athens, Greece
| | - Maria Culebras-Martínez
- Centre for Biomaterials and Tissue Engineering (CBIT), Universitat Politècnica de València, Camino de vera s/n, 46022, Valencia, Spain
| | - Gloria Gallego Ferrer
- Centre for Biomaterials and Tissue Engineering (CBIT), Universitat Politècnica de València, Camino de vera s/n, 46022, Valencia, Spain
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Valencia, Spain
| | - Apostolos Kyritsis
- National Technical University of Athens, Physics Department, Iroon Polytechneiou 9, Zografou Campus, 15780, Athens, Greece.
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10
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Capaccioli S, Ngai KL, Ancherbak S, Bertoldo M, Ciampalini G, Thayyil MS, Wang LM. The JG β-relaxation in water and impact on the dynamics of aqueous mixtures and hydrated biomolecules. J Chem Phys 2019; 151:034504. [DOI: 10.1063/1.5100835] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Capaccioli
- CNR-IPCF, Dipartimento di Fisica, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | - K. L. Ngai
- CNR-IPCF, Dipartimento di Fisica, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China
| | - S. Ancherbak
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | - M. Bertoldo
- ISOF - CNR Area della Ricerca di Bologna, Via P. Gobetti 101, 40129 Bologna, Italy
| | - G. Ciampalini
- Dipartimento di Fisica, Università di Pisa, Largo Bruno Pontecorvo 3, I-56127, Pisa, Italy
| | | | - Li-Min Wang
- State Key Lab of Metastable Materials Science and Technology, and College of Materials Science and Engineering, Yanshan University, Qinhuangdao, Hebei, 066004, China
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11
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Chang K, Luo H, Geise GM. Water content, relative permittivity, and ion sorption properties of polymers for membrane desalination. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2018.12.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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12
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Irreversible Swelling Behavior and Reversible Hysteresis in Chemically Crosslinked Poly(vinyl alcohol) Gels. Gels 2018; 4:gels4020045. [PMID: 30674821 PMCID: PMC6209262 DOI: 10.3390/gels4020045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 05/06/2018] [Accepted: 05/14/2018] [Indexed: 11/17/2022] Open
Abstract
We report the swelling properties of chemically crosslinked poly(vinyl alcohol) (PVA) gels with high degrees of polymerization and hydrolysis. Physical crosslinking by microcrystallites was introduced in this chemical PVA gel by a simple dehydration process. The equilibrium swelling ratio was measured in several mixed solvents, which comprised two-components: a good solvent (water or dimethyl sulfoxide (DMSO)), and a poor organic solvent for PVA. In the case of aqueous/organic solvent mixtures subjected to a multiple-sample test, the swelling ratio decreased continuously when the concentration of the organic solvent increased, reaching a collapsed state in the respective pure organic solvents. In the case of DMSO, starting from a swollen state, the swelling ratio rapidly decreased by between 15 and 50 mol % when the concentration of the organic compound increased in a single-sample test. To understand the hysteresis phenomenon, the swelling ratio was measured in a DMSO/acetone mixed solvent, starting from a collapsed state in acetone. The reversibility of swelling in response to successive concentration cycles between DMSO and acetone was examined. As a result, an irreversible swelling behavior was observed in the first cycle, and the swelling ratio in acetone after the first cycle became larger than the initial ratio. Subsequently, the swelling ratio changed reversibly, with a large hysteresis near a specific molar ratio of DMSO/acetone of 60/40. The microstructures were confirmed by Fourier transform infrared spectroscopy during the cycles. The irreversible swelling behavior and hysteresis are discussed in terms of the destruction and re-formation of additional physical crosslinking in the chemical PVA gels.
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Miyara M, Takashima I, Sasaki K, Kita R, Shinyashiki N, Yagihara S. Dynamics of uncrystallized water in partially crystallized poly(ethylene glycol)–water mixtures studied by dielectric spectroscopy. Polym J 2017. [DOI: 10.1038/pj.2017.15] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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14
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Stathopoulos AT, Kyritsis A, Shinyashiki N, Gómez-Ribelles JL, Pissis P. Effects of Solvent Crystallization in Swollen net-Poly(ethyl acrylate) α Relaxation Dynamics. J Phys Chem B 2016; 120:13206-13217. [PMID: 27966958 DOI: 10.1021/acs.jpcb.6b09922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The polymer α relaxation process for net-PEA gels swollen with nonpolar p-xylene is studied by employing dielectric relaxation spectroscopy. The results present the in situ monitoring of the dielectric behavior of α relaxation process under p-xylene cold crystallization, isothermal crystallization as well as crystallization from quenching. For the partially crystallized systems, the results exhibit that the amount of p-xylene crystal phase has no remarkable effects on the time scale, being controlled mainly by the amount of the noncrystallized p-xylene (cpx= 0.11-0.15) gel phase. Surprisingly, the stretching exponent βKWW obtains higher values in the isothermal crystallization process as the p-xylene crystallization is in progress and the reorganization of p-xylene through diffusion to crystallites approaches thermodynamic equilibrium. This directly indicates that any α process broadening is originated not solely from the amount of p-xylene crystallites and the induced heterogeneities, but from the presence of remarkable concentration fluctuations close to respective effective glass transition temperature, enhanced for higher solvent contents as well. Finally, the results suggest that the existence of p-xylene crystallites decrease significantly the dielectric strength of α process. The effective medium theory is applied to check whether this recorded reduction originates from the induced spatial heterogeneities (p-xylene crystallites) or from the immobilization in parts of polymer configurations.
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Affiliation(s)
- Andreas T Stathopoulos
- Department of Physics, National Technical University of Athens , Zografou Campus, 15780 Athens, Greece
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens , Zografou Campus, 15780 Athens, Greece
| | - Naoki Shinyashiki
- Department of Physics, Tokai University , Hiratsuka, Kanagawa 259-1292, Japan
| | - José Luis Gómez-Ribelles
- Centro de Biomateriales e Ingeniería Tisular, Universidad Politecnica de Valencia , P.O. Box 22012, E-46071 Valencia, Spain.,Regenerative Medicine Unit, Centro de Investigación Príncipe Felipe , Autopista del Saler 16, 46013 Valencia, Spain.,CIBER en Bioingeniería, Biomateriales y Nanomedicina , 46012 Valencia, Spain
| | - Polycarpos Pissis
- Department of Physics, National Technical University of Athens , Zografou Campus, 15780 Athens, Greece
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15
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Sasaki K, Panagopoulou A, Kita R, Shinyashiki N, Yagihara S, Kyritsis A, Pissis P. Dynamics of Uncrystallized Water, Ice, and Hydrated Protein in Partially Crystallized Gelatin–Water Mixtures Studied by Broadband Dielectric Spectroscopy. J Phys Chem B 2016; 121:265-272. [DOI: 10.1021/acs.jpcb.6b04756] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kaito Sasaki
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, 4-1-1
Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Anna Panagopoulou
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Rio Kita
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
- Micro/Nano Technology Center, Tokai University, 4-1-1
Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Naoki Shinyashiki
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Shin Yagihara
- Department of Physics,
Graduate School of Science, Tokai University, 4-1-1 Kitakaname, Hiratuka-shi, Kanagawa, Japan
| | - Apostolos Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
| | - Polycarpos Pissis
- Department of Physics, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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16
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Sasaki K, Kita R, Shinyashiki N, Yagihara S. Dielectric Relaxation Time of Ice-Ih with Different Preparation. J Phys Chem B 2016; 120:3950-3. [DOI: 10.1021/acs.jpcb.6b01218] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaito Sasaki
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Rio Kita
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Naoki Shinyashiki
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- Department of Physics, School
of Science, Tokai University, 4-1-1 Kitakaname, Hiratsuka-shi, Kanagawa 259-1292, Japan
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17
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Pastorczak M, Dominguez-Espinosa G, Okrasa L, Pyda M, Kozanecki M, Kadlubowski S, Rosiak JM, Ulanski J. Poly(vinyl methyl ether) hydrogels at temperatures below the freezing point of water-molecular interactions and states of water. Colloid Polym Sci 2014; 292:1775-1784. [PMID: 25100897 PMCID: PMC4115186 DOI: 10.1007/s00396-014-3283-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/21/2014] [Accepted: 05/22/2014] [Indexed: 10/26/2022]
Abstract
Water interacting with a polymer reveals a number of properties very different to bulk water. These interactions lead to the redistribution of hydrogen bonds in water. It results in modification of thermodynamic properties of water and the molecular dynamics of water. That kind of water is particularly well observable at temperatures below the freezing point of water, when the bulk water crystallizes. In this work, we determine the amount of water bound to the polymer and of the so-called pre-melting water in poly(vinyl methyl ether) hydrogels with the use of Raman spectroscopy, dielectric spectroscopy, and calorimetry. This analysis allows us to compare various physical properties of the bulk and the pre-melting water. We also postulate the molecular mechanism responsible for the pre-melting of part of water in poly(vinyl methyl ether) hydrogels. We suggest that above -60 °C, the first segmental motions of the polymer chain are activated, which trigger the process of the pre-melting.
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Affiliation(s)
- Marcin Pastorczak
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland ; Institute of Experimental Physics, University of Warsaw, Hoza 69, 00-681 Warsaw, Poland
| | - Gustavo Dominguez-Espinosa
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland ; Technological Lab of Uruguay (LATU), 6201 Av. Italia, 11500 Montevideo, Uruguay
| | - Lidia Okrasa
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Marek Pyda
- Department of Chemistry, Rzeszow University of Technology, Powstancow Warszawy 6, 35-959 Rzeszow, Poland
| | - Marcin Kozanecki
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Slawomir Kadlubowski
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
| | - Janusz M Rosiak
- Institute of Applied Radiation Chemistry, Lodz University of Technology, Wroblewskiego 15, 93-590 Lodz, Poland
| | - Jacek Ulanski
- Department of Molecular Physics, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
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18
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Sasaki K, Kita R, Shinyashiki N, Yagihara S. Glass transition of partially crystallized gelatin-water mixtures studied by broadband dielectric spectroscopy. J Chem Phys 2014; 140:124506. [DOI: 10.1063/1.4869346] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Panagopoulou A, Kyritsis A, Shinyashiki N, Pissis P. Protein and Water Dynamics in Bovine Serum Albumin–Water Mixtures over Wide Ranges of Composition. J Phys Chem B 2012; 116:4593-602. [DOI: 10.1021/jp2105727] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Panagopoulou
- Department of Physics, National Technical University of Athens, Zografou Campus,
157 80 Athens, Greece
| | - A. Kyritsis
- Department of Physics, National Technical University of Athens, Zografou Campus,
157 80 Athens, Greece
| | - N. Shinyashiki
- Department
of Physics, Tokai University, Hiratsuka,
Kanagawa, 259-1292 Japan
| | - P. Pissis
- Department of Physics, National Technical University of Athens, Zografou Campus,
157 80 Athens, Greece
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20
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Shinyashiki N, Asano M, Shimomura M, Sudo S, Kita R, Yagihara S. Dynamics of Polymer and Glass Transition in Partially Crystallized Polymer Solution Studied by Dielectric Spectroscopy. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 21:1937-46. [DOI: 10.1163/092050610x497278] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Naoki Shinyashiki
- a Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Megumi Asano
- b Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Mayumi Shimomura
- c Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Seiichi Sudo
- d Department of Physics, General Education Center, Tokyo City University, Tamazutsumi 1-28-1, Setagaya-ku, Tokyo 158-8557, Japan
| | - Rio Kita
- e Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
| | - Shin Yagihara
- f Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292, Japan
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21
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Motwani T, Lanagan M, Anantheswaran RC. State of water in starch–water systems in the gelatinization temperature range as investigated using dielectric relaxation spectroscopy. Carbohydr Polym 2012; 87:24-31. [DOI: 10.1016/j.carbpol.2011.06.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2010] [Revised: 06/10/2011] [Accepted: 06/21/2011] [Indexed: 10/18/2022]
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22
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Pastorczak M, Wübbenhorst M, Dominguez-Espinosa G, Okrasa L, Pyda M, Kozanecki M, Kadlubowski S, Ulanski P, Rosiak JM, Ulanski J. Relaxation processes and intermolecular interactions in PVME hydrogels in sub-zero temperatures: Glass transition and pre-melting of ice. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.11.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Capaccioli S, Ngai KL. Resolving the controversy on the glass transition temperature of water? J Chem Phys 2011; 135:104504. [DOI: 10.1063/1.3633242] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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24
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Panagopoulou A, Kyritsis A, Sabater I Serra R, Gómez Ribelles JL, Shinyashiki N, Pissis P. Glass transition and dynamics in BSA-water mixtures over wide ranges of composition studied by thermal and dielectric techniques. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2011; 1814:1984-96. [PMID: 21798376 DOI: 10.1016/j.bbapap.2011.07.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Revised: 07/12/2011] [Accepted: 07/13/2011] [Indexed: 11/24/2022]
Abstract
Protein-water dynamics in mixtures of water and a globular protein, bovine serum albumin (BSA), was studied over wide ranges of composition, in the form of solutions or hydrated solid pellets, by differential scanning calorimetry (DSC), thermally stimulated depolarization current technique (TSDC) and dielectric relaxation spectroscopy (DRS). Additionally, water equilibrium sorption isotherm (ESI) measurements were performed at room temperature. The crystallization and melting events were studied by DSC and the amount of uncrystallized water was calculated by the enthalpy of melting during heating. The glass transition of the system was detected by DSC for water contents higher than the critical water content corresponding to the formation of the first sorption layer of water molecules directly bound to primary hydration sites, namely 0.073 (grams of water per grams of dry protein), estimated by ESI. A strong plasticization of the T(g) was observed by DSC for hydration levels lower than those necessary for crystallization of water during cooling, i.e. lower than about 0.3 (grams of water per grams of hydrated protein) followed by a stabilization of T(g) at about -80°C for higher water contents. The α relaxation associated with the glass transition was also observed in dielectric measurements. In TSDC a microphase separation could be detected resulting in double T(g) for some hydration levels. A dielectric relaxation of small polar groups of the protein plasticized by water, overlapped by relaxations of uncrystallized water molecules, and a separate relaxation of water in the crystallized water phase (bulk ice crystals) were also recorded.
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Affiliation(s)
- A Panagopoulou
- National Technical University of Athens, Department of Physics, Athens, Greece.
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25
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Van Assche G, Van Mele B, Li T, Nies E. Adjacent UCST Phase Behavior in Aqueous Solutions of Poly(vinyl methyl ether): Detection of a Narrow Low Temperature UCST in the Lower Concentration Range. Macromolecules 2011. [DOI: 10.1021/ma102572s] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Guy Van Assche
- Department of Physical Chemistry and Polymer Science, Vrije Universiteit Brussel, Belgium
| | - Bruno Van Mele
- Department of Physical Chemistry and Polymer Science, Vrije Universiteit Brussel, Belgium
| | - Ting Li
- Polymer Research Division, Department of Chemistry, The Leuven Mathematical Modeling and Computational Science Centre (LMCC) and the Leuven Materials Research Centre (LMRC), Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
| | - Erik Nies
- Polymer Research Division, Department of Chemistry, The Leuven Mathematical Modeling and Computational Science Centre (LMCC) and the Leuven Materials Research Centre (LMRC), Katholieke Universiteit Leuven, Celestijnenlaan 200F, B-3001 Heverlee, Belgium
- Laboratory of Polymer Technology, Eindhoven University of Technology, The Netherlands
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26
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Stathopoulos AT, Kyritsis A, Colomer FJR, Ribelles JLG, Shinyashiki N, Christodoulides C, Pissis P. Polymer segmental dynamics and solvent thermal transitions in poly(ethyl acrylate)/p
-xylene mixtures. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22185] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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27
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Pastorczak M, Kozanecki M, Ulanski J. Water–Polymer interactions in PVME hydrogels – Raman spectroscopy studies. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.07.048] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Sengwa RJ, Choudhary S, Sankhla S. Dielectric behaviour and relaxation processes of montmorillonite clay nano-platelet colloidal suspensions in poly(vinyl pyrrolidone)-ethylene glycol oligomer blends. POLYM INT 2009. [DOI: 10.1002/pi.2592] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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29
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Dielectric spectroscopy of hydrophilic polymers–montmorillonite clay nanocomposite aqueous colloidal suspension. Colloids Surf A Physicochem Eng Asp 2009. [DOI: 10.1016/j.colsurfa.2008.11.015] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Cerveny S, Alegría Á, Colmenero J. Broadband dielectric investigation on poly(vinyl pyrrolidone) and its water mixtures. J Chem Phys 2008; 128:044901. [DOI: 10.1063/1.2822332] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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