1
|
Nayak S, Fieg M, Wang W, Bu W, Mallapragada S, Vaknin D. Effect of (Poly)electrolytes on the Interfacial Assembly of Poly(ethylene glycol)-Functionalized Gold Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2251-2260. [PMID: 30628793 DOI: 10.1021/acs.langmuir.8b03535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report on the effect of interpolymer complexes (IPCs) of poly(acrylic acid) (PAA) with poly(ethylene glycol)-functionalized Au nanoparticles (PEG-AuNPs) as they assemble at the vapor-liquid interface, using surface-sensitive synchrotron X-ray scattering techniques. Depending on the suspension pH, PAA functions both as a weak polyelectrolyte and a hydrogen bond donor, and these two roles affect the interfacial assembly of PEG-AuNPs differently. Above its isoelectric point, we find that PAA leads to the formation of a PEG-AuNP monolayer at the interface with a hexagonal structure. In the presence of high concentration of HCl (i.e., below the isoelectric point), at which PAA forms IPCs with PEG, the hexagonal structure at the interface appears to deteriorate, concurrent with aggregation in the bulk. Thus, while the electrolytic behavior of PAA induces interfacial assembly, the hydrogen bonding behavior, as PAA becomes neutral, favors the formation of 3D assemblies. For comparison, we also report on the formation of PEG-AuNP monolayers (in the absence of PAA) with strong electrolytes such as HCl, H2SO4, and NaOH that lead to a high degree of crystallinity.
Collapse
Affiliation(s)
| | | | - Wenjie Wang
- Division of Materials Sciences and Engineering, Ames Laboratory , USDOE , Ames , Iowa 50011 , United States
| | - Wei Bu
- NSF's ChemMatCARS , University of Chicago , Chicago , Illinois 60637 , United States
| | | | | |
Collapse
|
2
|
Tsai CY, Chung CH, Hong JL. Pyrene-Terminated, Amphiphilic Polypeptide and Its Hydrogen-Bonded Interpolymer Complex as Delivery Systems of Doxorubicin. ACS OMEGA 2018; 3:4423-4432. [PMID: 31458669 PMCID: PMC6641489 DOI: 10.1021/acsomega.8b00124] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Accepted: 03/29/2018] [Indexed: 05/10/2023]
Abstract
The intensity ratio between the first (373 nm) and the third (383 nm) vibronic peaks [I 1/I 3, as the pyrene (Py) scale] of fluorescent Py was used to monitor the critical concentration, drug-loading, and -releasing behaviors of a Py-terminated, amphiphilic polypeptide PPM and its hydrogen-bonded interpolymer complex (HIPC) with poly(acrylic acid) (PAA). Primarily, an amphiphilic PPM with a hydrophobic Py terminal and hydrophilic methoxy-bis(ethylene oxide) pendant groups was synthesized through multiple preparative steps, and the resultant PPM was thoroughly mixed with PAA through a preferable hydrogen bond (H bond) interaction to form HIPC. The emission study suggested that the I 1/I 3 ratio and the quantum yield (ΦF) are effective in determining the critical concentrations of the aqueous PPM and PPM/PAA solutions. Moreover, the I 1/I 3 ratio and ΦF were found to be convenient measures for determining the amounts of doxorubicin drugs loaded by and released from the aqueous PPM and PPM/PAA solutions.
Collapse
Affiliation(s)
- Chun-Yi Tsai
- Formosa
Chemicals & Fibre Corporation, No. 1, Taisu Industrial Park, Mailiao Township, Yunlin County 63801, Taiwan
| | - Chin-Hsiang Chung
- Department
of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
| | - Jin-Long Hong
- Department
of Materials and Optoelectronic Science, National Sun Yat-sen University, Kaohsiung 80424, Taiwan
- E-mail: .
Phone: +886-7-5252000-4065 (J.-L.H.)
| |
Collapse
|
3
|
Hrubý M, Filippov SK, Štěpánek P. Supramolecular structures and self-association processes in polymer systems. Physiol Res 2017; 65:S165-S178. [PMID: 27762583 DOI: 10.33549/physiolres.933419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Self-organization in a polymer system appears when a balance is achieved between long-range repulsive and short-range attractive forces between the chemically different building blocks. Block copolymers forming supramolecular assemblies in aqueous media represent materials which are extremely useful for the construction of drug delivery systems especially for cancer applications. Such formulations suppress unwanted physicochemical properties of the encapsulated drugs, modify biodistribution of the drugs towards targeted delivery into tissue of interest and allow triggered release of the active cargo. In this review, we focus on general principles of polymer selforganization in solution, phase separation in polymer systems (driven by external stimuli, especially by changes in temperature, pH, solvent change and light) and on effects of copolymer architecture on the self-assembly process.
Collapse
Affiliation(s)
- M Hrubý
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Prague, Czech Republic.
| | | | | |
Collapse
|
4
|
|
5
|
Sedlák M. A novel approach to controlled self-assembly of pH-responsive thermosensitive homopolymer polyelectrolytes into stable nanoparticles. Adv Colloid Interface Sci 2016; 232:57-69. [PMID: 26792020 DOI: 10.1016/j.cis.2015.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 12/07/2015] [Accepted: 12/08/2015] [Indexed: 12/14/2022]
Abstract
This review addresses the recent research progress in introducing and elaborating a novel approach to controlled polymer self-assembly into stable nanoparticles using pH-responsive thermosensitive homopolymer polyelectrolytes. Interesting aspect of this approach is that stable polymeric nanoparticles are formed from homopolymers of one type only and without any assembly-triggering additives. The process of their formation can be monitored online e.g. by light scattering and particle size can be finely custom tuned. Obtained nanoparticles have interesting properties and are very stable over long periods of time and over a broad range of salt concentrations including physiological conditions. Much effort was devoted not only to finding optimum experimental protocols and to characterizing resulting nanoparticles in detail, but also to understanding physical processes behind these successful protocols.
Collapse
|
6
|
Tang J, Berry RM, Tam KC. Stimuli-Responsive Cellulose Nanocrystals for Surfactant-Free Oil Harvesting. Biomacromolecules 2016; 17:1748-56. [PMID: 27064488 DOI: 10.1021/acs.biomac.6b00144] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cellulose nanocrystals with grafted binary polymer brushes (CNC-BPB), poly(oligoethylene glycol) methacrylate (POEGMA) and poly(methacrylic acid) (PMAA), were prepared by cerium-mediated polymerization in aqueous solution. The physical properties of CNC-BPB can be controlled by external triggers, such as temperature and pH, which can be utilized to stabilize and destabilize oil-water emulsions. By virtue of the modifications, these bifunctionalized CNCs diffused to the oil-water interface and stabilized the oil droplets at high pHs. When the pH was lowered to 2, strong hydrogen bonding between POEGMA and PMAA chains grafted on the CNC induced the coalescence of the emulsion droplets, resulting in the phase separation of oil and water. For emulsions stabilized by CNC-POEGMA and free PMAA mixtures, instantaneous coalescence was not observed at low pHs. Successive stabilization-destabilization over 5 cycles was demonstrated by modulating the pH with the addition of acid or base without any loss in efficiency. This work demonstrates that functional sustainable nanomaterials can be used for small scale oil-water separations, particularly for oil droplet transportation and harvesting of lipophilic compounds.
Collapse
Affiliation(s)
- Juntao Tang
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| | - Richard M Berry
- CelluForce, Inc. , 625 President-Kennedy Avenue, Montreal, Quebec H3A 1K2, Canada
| | - Kam C Tam
- Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada
| |
Collapse
|
7
|
Preparation of the Water-Soluble Pyrene-Containing Fluorescent Polymer by One-Pot Method. Polymers (Basel) 2015. [DOI: 10.3390/polym7121538] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
8
|
Palumbo FS, Bavuso Volpe A, Cusimano MG, Pitarresi G, Giammona G, Schillaci D. A polycarboxylic/amino functionalized hyaluronic acid derivative for the production of pH sensible hydrogels in the prevention of bacterial adhesion on biomedical surfaces. Int J Pharm 2015; 478:70-77. [DOI: 10.1016/j.ijpharm.2014.11.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Revised: 11/06/2014] [Accepted: 11/08/2014] [Indexed: 01/05/2023]
|
9
|
Li B, Lu X, Ma Y, Chen Z. Thermo- and pH-responsive behaviors of aqueous poly(acrylic acid)/poly(4-vinylpyridine) complex material characterized by ATR-FTIR and UV–Vis Spectroscopy. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.09.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Effect of pH and temperature upon self-assembling process between poly(aspartic acid) and Pluronic F127. Colloids Surf B Biointerfaces 2014; 119:47-54. [DOI: 10.1016/j.colsurfb.2014.04.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/03/2014] [Accepted: 04/23/2014] [Indexed: 11/18/2022]
|
11
|
Das S, Joseph MT, Sarkar D. Hydrogen bonding interpolymer complex formation and study of its host-guest interaction with cyclodextrin and its application as an active delivery vehicle. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1818-1830. [PMID: 23373846 DOI: 10.1021/la304466z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Interpolymer complex formation through hydrogen bonding has been investigated between two polymers: poly(acrylamide) (PAAm) and poly(vinyl alcohol) (PVA). The differential properties of the interpolymer complex with varying molecular weights of PVA have been studied by taking three different molecular weights of PVA. Furthermore, the host-guest interaction between the interpolymer complexes prepared and β-cyclodextrin (β-CD) has also been studied in detail. PAAm can form interpolymer complexes with PVA because of a cooperative hydrogen bonding interaction. The addition of β-CD to a dilute aqueous solution of PAAm-PVA results in a competition between interpolymer hydrogen bonding and host-guest interactions. In this article, we have tried to decipher the complex chemistry that occurs in the microheterogeneous solution. The PAAm-PVA binary system and the PAAm-PVA-β-CD ternary systems have been well characterized by using a fluorescent probe, coumarin-102. Dynamic light scattering (DLS), Fourier transform infrared (FTIR), fluorescence microscopy, and time-resolved fluorescence studies have been performed to substantiate steady-state fluorescence experiments. The results indicate the occurrence of a competitive interaction between the hydrogen bonding of the interpolymer complexes and the host-guest interaction with β-CD, whereby the later predominates. It is probable that the hydrophobic cavity of β-CD is threaded with linear polymers, thus forming a macromolecular supraassembly. It has also been concluded that PAAm preferentially interacts with β-CD by compromising its interaction with PVA. The enhanced deposition and retention of actives with this system was studied with a single species regrowth assay, antibacterial efficacy and the cell viability were studied using the live-dead staining protocol. This therefore opens new avenues in the targeted delivery of actives.
Collapse
Affiliation(s)
- Somnath Das
- Unilever R and D Bangalore, 64 Main Road, Whitefield, Bangalore 560066, India
| | | | | |
Collapse
|
12
|
Suleimenov I, Güven O, Mun G, Beissegul A, Panchenko S, Ivlev R. The formation of interpolymer complexes and hydrophilic associates of poly(acrylic acid) and non-ionic copolymers based on 2-hydroxyethylacrylate in aqueous solutions. POLYM INT 2013. [DOI: 10.1002/pi.4422] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ibragim Suleimenov
- Almaty University of Power Engineering and Telecommunications; Baitursynova Str.; 126; Almaty; 050013; Kazakhstan
| | - Olgun Güven
- Hacettepe University, Department of Chemistry; Beytepe; Ankara; 06532; Turkey
| | - Grigoriy Mun
- Al-Farabi Kazakh National University; Al-Farabi av.; 71; Almaty; 050038; Kazakhstan
| | - Aliya Beissegul
- Al-Farabi Kazakh National University; Al-Farabi av.; 71; Almaty; 050038; Kazakhstan
| | - Sergey Panchenko
- Almaty University of Power Engineering and Telecommunications; Baitursynova Str.; 126; Almaty; 050013; Kazakhstan
| | - Roman Ivlev
- Kazakh-British Technical University; Toli bi Str; 59; Almaty; 050000; Kazakhstan
| |
Collapse
|
13
|
Formation of fractals by the self-assembly of interpolymer adducts of polymethacrylic acid with complementary polymers in aqueous solution. J CHEM SCI 2012. [DOI: 10.1007/s12039-011-0158-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
14
|
Peng Z. Synthesis and the effect of hydrophobic dodecyl end groups on pH-responsive micellization of poly(acrylic acid) and poly(ethylene glycol) triblock copolymer in aqueous solution. IRANIAN POLYMER JOURNAL 2012. [DOI: 10.1007/s13726-012-0026-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
15
|
Rivas BL, Pereira ED, Palencia M, Sánchez J. Water-soluble functional polymers in conjunction with membranes to remove pollutant ions from aqueous solutions. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.11.001] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
16
|
Li Y, Li H, Chen X, Zhu F, Yang J, Zhu Y. Complexation of poly(acrylic acid) and poly(ethylene oxide) investigated by enhanced Rayleigh scattering method. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/polb.22058] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
17
|
Li Y, Li H, Sun Y, Chen X, Zhu Y. A study of complex formation between polyacrylic acid and poly(ethylene oxide) by near resonance Rayleigh scattering. APPLIED SPECTROSCOPY 2010; 64:682-686. [PMID: 20537236 DOI: 10.1366/000370210791414371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A series of near resonance Rayleigh scattering (NRRS) experiments has been performed on the phase behavior of complex formation between polyacrylic acid (PAA) and poly(ethylene oxide) (POE). On the basis of the theory of resonance scattering, as one new method compared to resonance Rayleigh scattering (RRS), NRRS was demonstrated to investigate polymer solutions. The results indicated that the complex formation induces an increase of the intensity of resonance scattering and the phase segregation leads to distortion of the resonance scattering spectrum with decreasing pH value. The collapse of macromolecular chains is attributed to the contraction of PAA chains and association between PAA and POE. Moreover, NRRS can show more information than RRS on the basis of their scattering spectra.
Collapse
Affiliation(s)
- Yunbo Li
- School of Materials Science & Engineering, Shanghai University, Shanghai 200072, China.
| | | | | | | | | |
Collapse
|
18
|
Sun Y, Peng Z, Liu X, Tong Z. Synthesis and pH-sensitive micellization of doubly hydrophilic poly(acrylic acid)-b-poly(ethylene oxide)-b-poly(acrylic acid) triblock copolymer in aqueous solutions. Colloid Polym Sci 2010. [DOI: 10.1007/s00396-010-2225-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Zhu Y, Yang Q, Tong C, Li M, Yu X. The vesicle formation in a binary amphiphilic diblock copolymer/homopolymer solution. POLYMER 2010. [DOI: 10.1016/j.polymer.2009.07.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Quijada-Garrido I, Prior-Cabanillas A, París R, Frutos G, Barrales-Rienda JM. Water Transport Properties of pH-Responsive Hydrogels Based on Poly(methacrylic acid) with Polyether Side Chains by Magnetic Resonance Imaging. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200800592] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
21
|
pH Sensitive supramolecular assembling system between a new linear water soluble β-cyclodextrin terpolymer and an amphiphilic poly(ethylene oxide). Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2008.11.042] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
22
|
Koňák Č, Sedlák M. pH-Sensitive Micelles Formed by Interchain Hydrogen Bonding of Poly(methacrylic acid)-block-Poly(ethylene oxide) Copolymers. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700214] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
23
|
Sotiropoulou M, Oberdisse J, Staikos G. Soluble Hydrogen-Bonding Interpolymer Complexes in Water: A Small-Angle Neutron Scattering Study. Macromolecules 2006. [DOI: 10.1021/ma052444r] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Maria Sotiropoulou
- Department of Chemical Engineering, University of Patras, GR-26504 Patras, Greece, and Laboratoire des Colloïdes, Verres et Nanomatériaux, Université Montpellier II, France, and Laboratoire Léon Brillouin CEA/CNRS, CEA Saclay, 91191 Gif sur Yvette, France
| | - Julian Oberdisse
- Department of Chemical Engineering, University of Patras, GR-26504 Patras, Greece, and Laboratoire des Colloïdes, Verres et Nanomatériaux, Université Montpellier II, France, and Laboratoire Léon Brillouin CEA/CNRS, CEA Saclay, 91191 Gif sur Yvette, France
| | - Georgios Staikos
- Department of Chemical Engineering, University of Patras, GR-26504 Patras, Greece, and Laboratoire des Colloïdes, Verres et Nanomatériaux, Université Montpellier II, France, and Laboratoire Léon Brillouin CEA/CNRS, CEA Saclay, 91191 Gif sur Yvette, France
| |
Collapse
|
24
|
Bhattacharjee RR, Chakraborty M, Mandal TK. Reversible Association of Thermoresponsive Gold Nanoparticles: Polyelectrolyte Effect on the Lower Critical Solution Temperature of Poly(vinyl methyl ether). J Phys Chem B 2006; 110:6768-75. [PMID: 16570984 DOI: 10.1021/jp056675b] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Thermoresponsive gold nanoparticles (GNPs) have been prepared by the borohydride reduction of gold salt in the presence of water-soluble polymer, poly(vinyl methyl ether) (PVME). The PVME-coated GNPs (PVME-GNPs) have been assembled into large aggregates in the presence of polyelectrolytes, viz., poly(sodium-4 styrene sulfonate) and sodium salt of carboxymethylcellulose at low pH by raising the solution temperature from 20 to 40 degrees C. Increase of temperature triggers the interparticle association due to hydrophobic interaction of pendent methyl group of the surface adsorbed PVME. This assembly process is reversible with respect to temperature and pH of the medium and was studied by monitoring the change in surface plasmon resonance band of PVME-GNPs. Three-dimensional assemblies of various architectures, depending on the concentration of polyelectrolytes, were observed through transmission electron microscopy. A mechanistic model has been suggested for the reversible assembly formation that suits well with the experimental observations. The changes in optical properties of the PVME-GNPs due to their aggregation/disaggregation enabled us to use it as an effective tool to monitor the change in lower critical solution temperature (LCST) of PVME in the presence of polyelectrolytes due to interpolymer complexation at low pH. This result agrees well with the variation of LCST of pure aqueous PVME solution in the presence of polyelectrolytes measured by conventional turbidimetric technique.
Collapse
Affiliation(s)
- Rama Ranjan Bhattacharjee
- Polymer Science Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | | | | |
Collapse
|
25
|
|
26
|
Natarajan P, Raja C. Studies on interpolymer self-organisation behaviour of protoporphyrin IX bound poly(carboxylic acid)s with complimentary polymers by means of fluorescence techniques. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2004.06.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
27
|
Khutoryanskiy VV, Dubolazov AV, Nurkeeva ZS, Mun GA. PH effects in the complex formation and blending of poly(acrylic acid) with poly(ethylene oxide). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:3785-90. [PMID: 15875416 DOI: 10.1021/la049807l] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
The effect of pH on the complex formation between poly(acrylic acid) (PAA) and poly(ethylene oxide) (PEO) has been studied in aqueous solutions by turbidimetric and fluorescent methods. It was shown that the formation of insoluble interpolymer complexes is observed below a certain critical pH of complexation (pH(crit1)). The formation of hydrophilic interpolymer associates is possible above pH(crit1) and below a certain pH(crit2). The effects of polymer concentrations in solution and PEO molecular weight as well as inorganic salt addition on these critical pH values were studied. The polymeric films based on blends of PAA and PEO were prepared by casting from aqueous solutions with different pHs. These films were characterized by light transmittance measurements and differential scanning calorimetry. The existence of the pH value above which the polymers form an immiscible blend was demonstrated. The transitions between the interpolymer complex, miscible blend, and immiscible blend caused by pH changes are discussed. The recommendations for preparation of homogeneous miscible films based on compositions of poly(carboxylic acids) and various nonionic water-soluble polymers are presented.
Collapse
Affiliation(s)
- Vitaliy V Khutoryanskiy
- Department of Pharmaceutical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow, G4 0NR Scotland, United Kingdom.
| | | | | | | |
Collapse
|
28
|
|
29
|
Virk HS, Kaur SA, Randhawa GS. Role of ion track filters in environmental surveillance. ENVIRONMENT INTERNATIONAL 2001; 27:359-362. [PMID: 11757849 DOI: 10.1016/s0160-4120(01)00086-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ion track filters (ITFs) are produced by physiochemical treatments to thin films of polymers and mica irradiated by heavy ions. These ITFs have many applications in the fields of science and technology. In the present investigation, the developed ITFs from polycarbonate films have been used to filter bacteria of various types in water. It is observed that the electric conduction through these filters depends upon the concentration of contaminants and pore diameter of filters. Filtration experiments were carried out using both single and multipore filters. Other applications related to environment surveillance have also been reported.
Collapse
Affiliation(s)
- H S Virk
- Department of Physics, Guru Nanak Dev University, Amritsar, India.
| | | | | |
Collapse
|
30
|
Chatterjee SK, Misra N. FLUORESCENCE STUDIES OF COMPLEXATION OF AURAMINE O LABELED POLY(METHACRYLIC ACID) AND RELATED ACRYLIC COPOLYMERS WITH NON-IONIC HOMOPOLYMERS. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1999. [DOI: 10.1081/ma-100101518] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
31
|
|
32
|
Koussathana M, Lianos P, Staikos G. Investigation of Hydrophobic Interactions in Dilute Aqueous Solutions of Hydrogen-Bonding Interpolymer Complexes by Steady-State and Time-Resolved Fluorescence Measurements. Macromolecules 1997. [DOI: 10.1021/ma9706485] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. Koussathana
- Engineering Science Department, University of Patras, 26500 Patras, Greece
| | - P. Lianos
- Engineering Science Department, University of Patras, 26500 Patras, Greece
| | - G. Staikos
- Department of Chemical Engineering, University of Patras and Institute of Chemical Engineering and High Temperature Chemical Processes, ICE/HT-FORTH, P.O. Box 1414, GR-26500 Patras, Greece
| |
Collapse
|
33
|
Chatterjee S, Misra N. Interpolymer association between random and graft acrylic copolymers with poly(ethylene imine): effects of copolymer structure. POLYMER 1997. [DOI: 10.1016/s0032-3861(96)00850-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
34
|
Mathur AM, Scranton AB. Synthesis and Ion-Binding Properties of Polymeric Pseudocrown Ethers II: Template Ion Induced Cyclization of Oligomeric Ethylene Glycol Diacrylates. SEP SCI TECHNOL 1997. [DOI: 10.1080/01496399708003200] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
35
|
|
36
|
Fomine S, Marin M, Fomina L, Salcedo R, Sansores E, Mendez JM, Jimenez CF, Ogawa T. Synthesis and Characterization of Novel Polyesters and Polyurethanes Containing 9,10-Diethynylanthracene and Pyromellitic Diimide. Polym J 1996. [DOI: 10.1295/polymj.28.641] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
37
|
Abstract
In this contribution the literature relevant to characterization of polyelectrolytes, polyelectrolyte complexes and hydrogels using luminescence spectroscopy is reviewed. A brief introduction to the fundamentals of luminescence is followed by a description of the various types of spectroscopic studies which may be used to characterize hydrogels. In addition to experiments based upon the addition of a viscosity, temperature- or polarity-sensitive fluorescent probe to characterize the local environment, experiments and techniques based upon luminescence quenching, fluorescence polarization, phosphorescence depolarization and excimer fluorescence are discussed. This review succinctly describes the utility of luminescence spectroscopy in the characterization of hydrogel systems, with a focus on recent developments in the characterization of hydrogels and polyelectrolyte complexes.
Collapse
Affiliation(s)
- B Rangarajan
- Michigan State University, Department of Chemical Engineering, East Lansing 48824, USA
| | | | | |
Collapse
|
38
|
Bell CL, Peppas NA. Swelling/syneresis phenomena in gel-forming interpolymer complexes. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 1996; 7:671-83. [PMID: 8639476 DOI: 10.1163/156856296x00444] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Grafted poly(methacrylic acid-g-ethylene glycol) (P(MAA-g-EG)) copolymers were synthesized and their pH sensitivity investigated as a function of copolymer composition and PEG graft molecular weight. Interpolymer complexation occurred by hydrogen bonding between carboxylic groups on poly(methacrylic acid) (PMAA) and ether groups on poly(ethylene glycol) (PEG). This complexation was sensitive to the surrounding environment as complexes formed at pH levels low enough to insure substantial protonation of PMAA acid groups. At high pH, the acid groups became neutralized and did not form complexes. P(MAA-g-EG) membranes showed pH-sensitivity due to complex formation and dissociation. Uncomplexed equilibrium swelling ratios were much higher than those of the complexed states and varied according to copolymer composition and PEG graft length. Mesh sizes in the two states were determined. Swelling under oscillatory pH conditions and constant ionic strength revealed the dynamic sensitivity of P(MAA-g-EG) membranes. Under changing pH conditions, network syneresis (complexation) occurred more rapidly than network expansion (decomplexation) because of the rates of diffusion of specific ions causing the responses. No distinct water fronts were observed. Instead, water transport was continuous through the gel. These gels show great promise for a number of biomedical applications where fast biomaterial response is necessary.
Collapse
Affiliation(s)
- C L Bell
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-1283, USA
| | | |
Collapse
|
39
|
Bell CL, Peppas NA. Biomedical membranes from hydrogels and interpolymer complexes. BIOPOLYMERS II 1995. [DOI: 10.1007/3540587888_15] [Citation(s) in RCA: 137] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
40
|
Complexation between polyoxyethylene and polymethacrylic acid—the importance of the molar mass of polyoxyethylene. Eur Polym J 1994. [DOI: 10.1016/0014-3057(94)90003-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
41
|
Yoshida M, Omichi H, Katakai R. Relaxation Phenomena of Thermo-Shrinkage of Methacryloyl Polymer Gels with Pendant α-Amino Acid Groups. Polym J 1993. [DOI: 10.1295/polymj.25.215] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
42
|
Fluorescence study of polyelectrolyte complex formation: 2. Effect of acidity of polyanions on complexation. POLYMER 1992. [DOI: 10.1016/0032-3861(92)90089-f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
43
|
|