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Islam MR, Tanveer S, Chen CC. Modeling swelling behavior of hydrogels in aqueous organic solvents. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2021.116744] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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2
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Yang HE, Bae YC. Group contribution method for the swelling behavior of thermo-responsive hydrogels. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/polb.24289] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Han Earl Yang
- Department of Chemical Engineering and Molecular Thermodynamics Laboratory; Hanyang University; Seoul 133-791 Korea
| | - Young Chan Bae
- Department of Chemical Engineering and Molecular Thermodynamics Laboratory; Hanyang University; Seoul 133-791 Korea
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3
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Affiliation(s)
- Natasha Kamerlin
- Department
of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Box
523, S-751 20 Uppsala, Sweden
- Department
of Mathematics, Uppsala University, Box 480, S-751 06 Uppsala, Sweden
| | - Christer Elvingson
- Department
of Chemistry - Ångström Laboratory, Physical Chemistry, Uppsala University, Box
523, S-751 20 Uppsala, Sweden
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Großmann T, Browarzik D. Calculation of the of the swelling behavior of poly (N-isopropylacrylamide) in an associating solvent. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.02.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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A lattice molecular thermodynamic model for thermo-sensitive random copolymer hydrogels. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3411-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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6
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Li G, Zhou L, Wang C, Li E. Study on self-assembly properties of thermosensitive fluorinated hydrophobically associating polyacrylamide. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0522-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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8
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Kim SM, Lee SM, Bae YC. Influence of hydroxyl group for thermoresponsive poly(N-isopropylacrylamide) gel particles in water/co-solvent (1,3-propanediol, glycerol) systems. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.03.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abstract
Bioresponsive hydrogels are emerging with technological significance in targeted drug delivery, biosensors, and regenerative medicine. Their ability to respond to specific biologically derived stimuli creates a design challenge in effectively linking the conferred biospecificity with an engineered response tailored to the needs of a particular application. Moreover, the fundamental phenomena governing the response must support an appropriate dynamic range, limit of detection, and the potential for feedback control. The design of these systems is inherently complicated due to the high interdependency of the governing phenomena that guide sensing, transduction, and actuation of the hydrogel. Future advancements in bioresponsive hydrogels will out of necessity contain control loops similar to synthetic metabolic pathways. The use of these materials will continue to expand as they become coupled and integrated with new technologies.
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Kim SM, Bae YC. Co-nonsolvency effect of thermosensitive N-isopropylacrylamide nanometer-sized gel particles in water–PEG systems. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.02.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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Fernández VVA, Aguilar J, Becerra F, Sánchez-Díaz JC, Soltero JFA, Ortega-Gudiño P, Hernandez E, Bautista F, Puig JE. Tailoring thermoresponsive nanostructured poly(N-isopropylacrylamide) hydrogels made with poly(acrylamide) nanoparticles. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-013-2918-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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UEMUKAI T, HIOKI T, ISHIFUNE M. Preparation of Thermoresponsive Polymer-Modified Electrodes Having a TEMPO Moiety. ELECTROCHEMISTRY 2013. [DOI: 10.5796/electrochemistry.81.383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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13
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Strandman S, Lessard DG, van Dusschoten D, Wilhelm M, Wood-Adams PM, Spiess HW, Zhu X. Two-dimensional Fourier transform rheological study on thermosensitivity of poly(N,N-diethylacrylamide) in aqueous solutions. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.08.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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14
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Althans D, Langenbach K, Enders S. Influence of different alcohols on the swelling behaviour of hydrogels. Mol Phys 2012. [DOI: 10.1080/00268976.2012.655339] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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15
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Jung SC, Bae YC. Molecular Thermodynamic Analysis for Assessing the Relationship Between Reentrant Swelling Behavior and Ternary Liquid–Liquid Equilibrium for Poly(N-isopropylacrylamide) Nanometer-Sized Gel Particles in a Water–Tetrahydrofuran Cosolvent System. J Phys Chem B 2012; 116:2208-15. [DOI: 10.1021/jp209501f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sang Chul Jung
- Division of Chemical Engineering and Molecular Thermodynamics
Laboratory, Hanyang University, Seoul 133-791,
Korea
| | - Young Chan Bae
- Division of Chemical Engineering and Molecular Thermodynamics
Laboratory, Hanyang University, Seoul 133-791,
Korea
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16
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Comparison of the multiphasic model and the transport model for the swelling and deformation of polyelectrolyte hydrogels. J Mech Behav Biomed Mater 2011; 4:1328-35. [DOI: 10.1016/j.jmbbm.2011.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Revised: 04/29/2011] [Accepted: 05/02/2011] [Indexed: 11/22/2022]
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17
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Quesada-Pérez M, Guadalupe Ibarra-Armenta J, Martín-Molina A. Computer simulations of thermo-shrinking polyelectrolyte gels. J Chem Phys 2011; 135:094109. [DOI: 10.1063/1.3632051] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Diffusion of poly(ethylene glycol) and ectoine in NIPAAm hydrogels with confocal Raman spectroscopy. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2399-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Balaceanu A, Demco DE, Möller M, Pich A. Microgel Heterogeneous Morphology Reflected in Temperature-Induced Volume Transition and 1H High-Resolution Transverse Relaxation NMR. The Case of Poly(N-vinylcaprolactam) Microgel. Macromolecules 2011. [DOI: 10.1021/ma200103y] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andreea Balaceanu
- Functional and Interactive Polymers, DWI RWTH Aachen University, Pauwelsstrasse 8, D-52074 Aachen, Germany
| | - Dan E. Demco
- Functional and Interactive Polymers, DWI RWTH Aachen University, Pauwelsstrasse 8, D-52074 Aachen, Germany
| | - Martin Möller
- Functional and Interactive Polymers, DWI RWTH Aachen University, Pauwelsstrasse 8, D-52074 Aachen, Germany
| | - Andrij Pich
- Functional and Interactive Polymers, DWI RWTH Aachen University, Pauwelsstrasse 8, D-52074 Aachen, Germany
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Feng L, Jia Y, Chen X, Li X, An L. A multiphasic model for the volume change of polyelectrolyte hydrogels. J Chem Phys 2010; 133:114904. [DOI: 10.1063/1.3484236] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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A molecular thermodynamic model for temperature- and solvent-sensitive hydrogels, application to the swelling behavior of PNIPAm hydrogels in ethanol/water mixtures. Chem Eng Sci 2010. [DOI: 10.1016/j.ces.2010.02.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Vidyasagar A, Majewski J, Toomey R. Temperature Induced Volume-Phase Transitions in Surface-Tethered Poly(N-isopropylacrylamide) Networks. Macromolecules 2008. [DOI: 10.1021/ma071438n] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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24
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Takeoka Y, Seki T. Biform Structural Colored Hydrogel for Observation of Subchain Conformations. Macromolecules 2007. [DOI: 10.1021/ma0701078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yukikazu Takeoka
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
| | - Takahiro Seki
- Department of Molecular Design & Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
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25
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Hart DS, Gehrke SH. Thermally Associating Polypeptides Designed for Drug Delivery Produced by Genetically Engineered Cells. J Pharm Sci 2007; 96:484-516. [PMID: 17080413 DOI: 10.1002/jps.20755] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Thermally associating polymers, including gelatin, cellulose ethers (e.g., Methocels and poloxamers (e.g., Pluronics) have a long history of use in pharmacy. Over the past 20 years, significant advances in genetic engineering and the understanding of protein secondary and tertiary structures have been made. This has led to the development of a variety of polypeptides that do not occur naturally but can be expressed in recombinant cells and have useful properties that lend themselves to novel applications where current materials cannot perform. The most intensively studied motifs are derived from the consensus repeats of elastin and silk, as well as coiled-coil helices. Many of these designed polypeptides or 'artificial proteins' are thermally associating materials. This property can be exploited to develop solid dosage forms, injectable drug delivery systems, micro- or nanoparticle drug carriers, triggered or targeted release systems, or as a means of simplifying the purification process and thus reducing costs of production of these materials. This review focuses on the development and characterization of this novel class of biomaterials and examines their potential for pharmaceutical applications.
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Affiliation(s)
- David S Hart
- Department of Chemical and Petroleum Engineering, The University of Kansas, 1530 W 15th St., Lawrence, Kansas 66045, USA
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26
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Wu C, Zhou S. Light scattering study of spherical poly(N-isopropylacrylamide) microgels. J MACROMOL SCI B 2006. [DOI: 10.1080/00222349708212388] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Chi Wu
- a Department of Chemistry , The Chinese University of Hong Kong Shatin , N. T., Hong Kong
| | - Shuiqin Zhou
- a Department of Chemistry , The Chinese University of Hong Kong Shatin , N. T., Hong Kong
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27
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Maeda T, Kanda T, Yonekura Y, Yamamoto K, Aoyagi T. Hydroxylated Poly(N-isopropylacrylamide) as Functional Thermoresponsive Materials. Biomacromolecules 2006; 7:545-9. [PMID: 16471928 DOI: 10.1021/bm050829b] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this study, we developed a poly(N-isopropylacrylamide)-based thermoresponsive polymeric material with a high content of hydroxyl groups. We newly designed the functional monomer, N-(2-hydroxyisopropyl)acrylamide (HIPAAm), considering maintaining the continuous and repeated structure of the isopropylamide group after copolymerization and the monomer reactivity ratios. The thermoresponsive polymer was derived by conventional radical copolymerization of HIPAAm with N-isopropylacrylamide (NIPAAm) in high yield. Estimation of monomer reactivity ratios, r(1) and r(2), supported the almost random sequence of the comonomers. The obtained copolymers showed a very sensitive phase transition and/or separation in response to temperature in aqueous media although they have many hydrophilic parts, and their thermoresponsive behavior was not affected by the pH. Furthermore, the cloud points of these copolymers closely depended on the HIPAAm content and could be easily controlled by adding salts. HIPAAm is expected to regulate the phase transition and/or separation temperature of the NIPAAm-based copolymers while maintaining their desirable sensitive thermoresponse. Differential scanning calorimetric analysis showed that dehydration of the polymer chains occurring in phase transition became incomplete with increasing HIPAAm content. Moreover, it was found that poly(NIPAAm-co-HIPAAm) having a high content of the HIPAAm unit showed liquid-liquid phase separation involving coacervation. The sizes of the coacervate droplets were relatively monodisperse and very minimal. Poly(NIPAAm-co-HIPAAm) is valuable for use in biomedical fields such as bioseparation.
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Affiliation(s)
- Tomohiro Maeda
- Department of Nanostructure and Advanced Materials, Graduate School of Science and Engineering, Kagoshima University, 1-21-40, Korimoto, Kagoshima 890-0065, Japan
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28
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Yin DW, Yan Q, de Pablo JJ. Molecular dynamics simulation of discontinuous volume phase transitions in highly-charged crosslinked polyelectrolyte networks with explicit counterions in good solvent. J Chem Phys 2005; 123:174909. [PMID: 16375571 DOI: 10.1063/1.2102827] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The volumetric properties of highly-charged defect-free polyelectrolyte networks with tetrafunctional crosslinks are studied through molecular dynamics simulations in the canonical ensemble. The network backbone monomers, which are monovalent, and the counterions, which are mono-, di-, or trivalent, are modeled explicitly in the simulations, but the solvent is treated implicitly as a dielectric medium of good solvation quality. The osmotic pressure of the network-solvent system is found to depend greatly on the strength of electrostatic interactions. Discontinuous volume phase transitions are observed when the electrostatic interactions are strong, and the onset of these transitions shifts to higher solvent dielectricity as the counterion valency increases. The roles of the various virial contributions to the osmotic pressure are examined. The network elasticity entropy is found to behave nearly classically. As the network contracts and collapses with increasing strength of electrostatic interactions, the loss of counterion entropy leads to increased counterion osmotic pressure contributions via two mechanisms. The reduction in available configurational space increases the counterion translational entropy contribution to the ideal part of the osmotic pressure, and the greater number of counterion-monomer contacts formed due to counterion condensation and confinement increases the counterion excluded-volume entropy contribution to the excess part of the osmotic pressure. These observations contrast the decrease in the single ideal-gas-like counterion translational entropy contribution to the osmotic pressure predicted by the counterion condensation-charge renormalization theory. An accompanying decrease in the total electrostatic energy balances the loss of counterion excluded-volume entropy as the polyelectrolyte networks collapse in low-dielectric solvents. This interplay between the electrostatic energy and the counterion excluded-volume entropy appears to be responsible for the discontinuous volume phase transitions that are observed in polyelectrolyte networks. The structure of the polyelectrolyte network is also found to be affine in the swollen state, with constituent chains nearly fully extended, and nonaffine in the collapsed state, with the chains adopting a Gaussian conformation.
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Affiliation(s)
- De-Wei Yin
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, Wisconsin 53706-1691, USA
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29
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Mendez S, Curro JG, McCoy JD, Lopez GP. Computational Modeling of the Temperature-Induced Structural Changes of Tethered Poly(N-isopropylacrylamide) with Self-Consistent Field Theory. Macromolecules 2004. [DOI: 10.1021/ma048156x] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergio Mendez
- Department of Chemical & Nuclear Engineering, University of New Mexico, Albuquerque, New Mexico 87131, Sandia National Laboratories, Albuquerque, New Mexico 87185, and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining & Technology, Socorro, New Mexico 87801
| | - John G. Curro
- Department of Chemical & Nuclear Engineering, University of New Mexico, Albuquerque, New Mexico 87131, Sandia National Laboratories, Albuquerque, New Mexico 87185, and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining & Technology, Socorro, New Mexico 87801
| | - John D. McCoy
- Department of Chemical & Nuclear Engineering, University of New Mexico, Albuquerque, New Mexico 87131, Sandia National Laboratories, Albuquerque, New Mexico 87185, and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining & Technology, Socorro, New Mexico 87801
| | - Gabriel P. Lopez
- Department of Chemical & Nuclear Engineering, University of New Mexico, Albuquerque, New Mexico 87131, Sandia National Laboratories, Albuquerque, New Mexico 87185, and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining & Technology, Socorro, New Mexico 87801
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31
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Jeon HK, Macosko CW, Moon B, Hoye TR, Yin Z. Coupling Reactions of End- vs Mid-Functional Polymers. Macromolecules 2004. [DOI: 10.1021/ma030581n] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hyun K. Jeon
- Department of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Center for Education and Research on Macromolecules (CERM), University of Liège, Start-Tilman B6a, 4000 Liège, Belgium
| | - Christopher W. Macosko
- Department of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Center for Education and Research on Macromolecules (CERM), University of Liège, Start-Tilman B6a, 4000 Liège, Belgium
| | - Bongjin Moon
- Department of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Center for Education and Research on Macromolecules (CERM), University of Liège, Start-Tilman B6a, 4000 Liège, Belgium
| | - Thomas R. Hoye
- Department of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Center for Education and Research on Macromolecules (CERM), University of Liège, Start-Tilman B6a, 4000 Liège, Belgium
| | - Zhihui Yin
- Department of Chemical Engineering and Materials Science and Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, and Center for Education and Research on Macromolecules (CERM), University of Liège, Start-Tilman B6a, 4000 Liège, Belgium
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Gundogan N, Melekaslan D, Okay O. Non-Gaussian elasticity of swollen poly(N-isopropylacrylamide) gels at high charge densities. Eur Polym J 2003. [DOI: 10.1016/s0014-3057(03)00153-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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34
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Maliakal A, Greenaway H, O'Shaughnessy B, Turro NJ. Chain Length Dependent Polymer End−End Reaction Rate Constants in the Reaction of Polystyryllithium with a Styrene-Terminated Fluorescent-Labeled Polystyrene. Macromolecules 2003. [DOI: 10.1021/ma0300847] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ashok Maliakal
- Department of Chemistry and Department of Chemical Engineering, Columbia University, New York, New York 10027
| | - Hamish Greenaway
- Department of Chemistry and Department of Chemical Engineering, Columbia University, New York, New York 10027
| | - Ben O'Shaughnessy
- Department of Chemistry and Department of Chemical Engineering, Columbia University, New York, New York 10027
| | - Nicholas J. Turro
- Department of Chemistry and Department of Chemical Engineering, Columbia University, New York, New York 10027
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35
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Ogawa K, Ogawa Y, Kokufuta E. Effect of charge inhomogeneity of polyelectrolyte gels on their swelling behavior. Colloids Surf A Physicochem Eng Asp 2002. [DOI: 10.1016/s0927-7757(02)00189-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Hong YP, Bae YC. Phase behaviors of partially ionized hydrogels in aqueous salt solutions: Applicability of the modified double-lattice model. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/polb.10218] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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37
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Lu ZY, Hentschke R. Computer simulation study on the swelling of a model polymer network by a chainlike solvent. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2002; 65:041807. [PMID: 12005866 DOI: 10.1103/physreve.65.041807] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2001] [Revised: 01/07/2002] [Indexed: 05/23/2023]
Abstract
A molecular-dynamics-particle-transfer method was used to study the swelling of a model polymer network by a short chain solvent. The solvent chains were transferred depending on the difference between the solvent chemical potentials in the coupled simulation boxes, containing pure solvent and gel, respectively. The chemical potentials were computed via the Rosenbluth sampling method. The simulated swelling ratio of the network under subcritical and supercritical conditions is compared with the prediction of a modified Flory-Huggins theory. In addition, the chains exhibit markedly different structural and dynamic properties in the corresponding phases due to the constraint imposed by the network, which are discussed in detail.
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Affiliation(s)
- Z-Y Lu
- FB Physik, Bergische Universität-Gesamthochschule, D-42097 Wuppertal, Germany
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38
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Lu ZY, Hentschke R. Swelling of a model polymer network by a one-site solvent: computer simulation and Flory-Huggins-like theory. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2001; 63:051801. [PMID: 11414924 DOI: 10.1103/physreve.63.051801] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2000] [Indexed: 05/23/2023]
Abstract
A molecular-dynamics-Widom test particle-simulation was used to investigate the swelling of a model polymer network in contact with a one-site solvent under subcritical and supercritical conditions. Particle motion is computed via molecular dynamics. Simultaneously, the solvent particle concentration is controlled by direct comparison of the chemical potentials in two reference systems (pure solvent and network including solvent), which are calculated using Widom's test particle method. The simulated swelling isotherms exhibit complex behavior: at the subcritical conditions considered here, the swelling ratio decreases with increasing pressure. At the intermediate supercritical temperatures the isotherms exhibit a peak, which disappears with the elevation of temperature. At high temperatures, the swelling ratio of the network increases monotonically with increasing pressure. The corresponding isobars also exhibit a maximum, which broadens and shifts to higher temperatures with increasing supercritical pressure. These results are in qualitative agreement with the prediction of a modified Flory-Huggins theory and with the results of known experiments. Furthermore, the self-diffusion coefficients of the solvent in the network and in its pure state are simulated. The solvent mobility in the network is significantly decreased because of the hindrance of network beads, but exhibits different behavior at subcritical in comparison to supercritical temperatures.
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Affiliation(s)
- Z Y Lu
- FB Physik, Bergische Universität-Gesamthochschule, D-42097 Wuppertal, Germany
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40
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Kenkare NR, Hall CK, Khan SA. Theory and simulation of the swelling of polymer gels. J Chem Phys 2000. [DOI: 10.1063/1.481806] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Aydt EM, Hentschke R. Swelling of a model network: A Gibbs-ensemble molecular dynamics study. J Chem Phys 2000. [DOI: 10.1063/1.481114] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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42
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Varghese S, Lele AK, Mashelkar RA. Designing new thermoreversible gels by molecular tailoring of hydrophilic-hydrophobic interactions. J Chem Phys 2000. [DOI: 10.1063/1.480881] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yan L, Zhu Q, Kenkare PU. Lower critical solution temperature of linear PNIPA obtained from a Yukawa potential of polymer chains. J Appl Polym Sci 2000. [DOI: 10.1002/1097-4628(20001209)78:11<1971::aid-app170>3.0.co;2-p] [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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Suetoh Y, Shibayama M. Effects of non-uniform solvation on thermal response in poly( N -isopropylacrylamide) gels. POLYMER 2000. [DOI: 10.1016/s0032-3861(99)00175-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Liu Y, Velada JL, Huglin MB. Thermoreversible swelling behaviour of hydrogels based on N-isopropylacrylamide with sodium acrylate and sodium methacrylate. POLYMER 1999. [DOI: 10.1016/s0032-3861(98)00660-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tong Z, Zeng F, Zheng X, Sato T. Inverse Molecular Weight Dependence of Cloud Points for Aqueous Poly(N-isopropylacrylamide) Solutions. Macromolecules 1999. [DOI: 10.1021/ma990062d] [Citation(s) in RCA: 183] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Tong
- Research Institute of Materials Science, South China University of Technology, Guangzhou 510641, China
| | - Fang Zeng
- Research Institute of Materials Science, South China University of Technology, Guangzhou 510641, China
| | - Xu Zheng
- Research Institute of Materials Science, South China University of Technology, Guangzhou 510641, China
| | - Takahiro Sato
- Department of Macromolecular Science, Osaka University, Toyonaka, Osaka 560, Japan
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Choi HS, Kim JM, Lee KJ, Bae YC. Volume phase transition behavior ofN-isopropyl acrylamide-N-cyanomethyl acrylamide copolymer gel particles: The effect of crosslinking density. J Appl Polym Sci 1999. [DOI: 10.1002/(sici)1097-4628(19990523)72:8<1091::aid-app14>3.0.co;2-p] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Sun YM, Chen JP, Chu DH. Preparation and characterization of alpha-amylase-immobilized thermal-responsive composite hydrogel membranes. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1999; 45:125-32. [PMID: 10397966 DOI: 10.1002/(sici)1097-4636(199905)45:2<125::aid-jbm7>3.0.co;2-b] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Composite hydrogel membranes of crosslinked poly(N-isopropylacrylamide-co-N-acryloxysuccinimide-co-2-hydroxyet hyl methacrylate) [P(NIPAAm-NAS-HEMA)] with starch, as a macropore forming agent, on nonwoven polyester was prepared. The membranes could swell and de-swell around the characteristic lower critical solution temperature (LCST) of poly(N-isopropylacrylamide) (PNIPAAm). It was demonstrated that the presence of macropores in the membranes could improve the immobilization efficiency as well as lead to a short responding time upon temperature change across the LCST. Immobilized alpha-amylase could retain as high as 33% of the activity of the free enzyme with a loading level of 0.60-0.65 mg/cm2 when the membrane preparation and enzyme immobilization conditions were optimized. The half time (T0.5) for the swelling or de-swelling response of the gel phase within the membranes was less than 2 min, and the 90% time (T0.9) was less than 6 min. The permeability for maltose through the membranes could change as much as 4.9-fold when the temperature was raised above or reduced below the LCST.
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Affiliation(s)
- Y M Sun
- Department of Chemical Engineering, Yuan Ze University, Chung-Li, Taoyuan, Taiwan 320, Republic of China
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