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Kaewtatip K, Saepoo T, Sarak S, Mayakun J, Chaibundit C. Preparation and characterization of biodegradable starch foam composite with treated Khlum fiber for food packaging. J Appl Polym Sci 2023. [DOI: 10.1002/app.53782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- Kaewta Kaewtatip
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
- Center of Excellence for Trace Analysis and Biosensor Prince of Songkla University Hat Yai Songkhla Thailand
| | - Thonyaporn Saepoo
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
| | - Sukanya Sarak
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
| | - Jaruwan Mayakun
- Division of Biological Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
| | - Chiraphon Chaibundit
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
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Boonsuk P, Sukolrat A, Chantarak S, Kelarakis A, Chaibundit C. Poly(vinyl alcohol)/modified cassava starch blends plasticized with glycerol and sorbitol. J Appl Polym Sci 2022. [DOI: 10.1002/app.52362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Phetdaphat Boonsuk
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
| | - Apinya Sukolrat
- Office of Scientific Instrument and Testing Prince of Songkla University Hat Yai Songkhla Thailand
| | - Sirinya Chantarak
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
| | - Antonios Kelarakis
- UCLan Research Centre for Smart Materials, School of Natural Sciences University of Central Lancashire Preston UK
| | - Chiraphon Chaibundit
- Division of Physical Science, Faculty of Science Prince of Songkla University Hat Yai Songkhla Thailand
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Boonsuk P, Sukolrat A, Bourkaew S, Kaewtatip K, Chantarak S, Kelarakis A, Chaibundit C. Structure-properties relationships in alkaline treated rice husk reinforced thermoplastic cassava starch biocomposites. Int J Biol Macromol 2020; 167:130-140. [PMID: 33249147 DOI: 10.1016/j.ijbiomac.2020.11.157] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/23/2020] [Accepted: 11/23/2020] [Indexed: 11/28/2022]
Abstract
The study focuses on structure-properties relationships in thermoplastic cassava starch (TPS) based biocomposites comprising 5-20 wt% of untreated and treated rice husk (RH). Alkaline treatment with 11% w/v NaOH removed the hemicellulose layer of RH as confirmed by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), and resulted in a larger population of -OH groups exposing on the fibril surface. Consequently, the filler-matrix interactions between treated RH and TPS were enhanced, although Brunauer-Emmett-Teller (BET) surface area analysis indicated that the surface area of treated RH was not increased. Interestingly, the biocomposites contained 20 wt% treated RH showed substantially improved tensile strength by a factor of 220% compared to the neat TPS. The biocomposite at 15 wt% treated RH showed high water absorption. TPS with all treated RH contents showed high biodegradation rate, while the thermal stability of the TPS/treated RH biocomposites was slightly decreased. These novel composites showed promising properties for applications as absorbents.
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Affiliation(s)
- Phetdaphat Boonsuk
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Apinya Sukolrat
- Office of Scientific Instrument and Testing, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sain Bourkaew
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Kaewta Kaewtatip
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Sirinya Chantarak
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand
| | - Antonios Kelarakis
- UCLan Research Centre for Smart Materials, School of Natural Sciences, University of Central Lancashire, Preston PR1 2HE, UK
| | - Chiraphon Chaibundit
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand.
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Boonsuk P, Sukolrat A, Kaewtatip K, Chantarak S, Kelarakis A, Chaibundit C. Modified cassava starch/poly(vinyl alcohol) blend films plasticized by glycerol: Structure and properties. J Appl Polym Sci 2020. [DOI: 10.1002/app.48848] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Phetdaphat Boonsuk
- Department of Materials Science and Technology, Faculty of SciencePrince of Songkla University Hat Yai Songkhla 90110 Thailand
| | - Apinya Sukolrat
- Office of Scientific Instrument and TestingPrince of Songkla University Hat Yai Songkhla 90110 Thailand
| | - Kaewta Kaewtatip
- Department of Materials Science and Technology, Faculty of SciencePrince of Songkla University Hat Yai Songkhla 90110 Thailand
| | - Sirinya Chantarak
- Department of Materials Science and Technology, Faculty of SciencePrince of Songkla University Hat Yai Songkhla 90110 Thailand
| | - Antonios Kelarakis
- School of Physical Sciences and ComputingUniversity of Central Lancashire Preston PR1 2HE UK
| | - Chiraphon Chaibundit
- Department of Materials Science and Technology, Faculty of SciencePrince of Songkla University Hat Yai Songkhla 90110 Thailand
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Junlapong K, Maijan P, Chaibundit C, Chantarak S. Effective adsorption of methylene blue by biodegradable superabsorbent cassava starch-based hydrogel. Int J Biol Macromol 2020; 158:258-264. [PMID: 32371133 DOI: 10.1016/j.ijbiomac.2020.04.247] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/23/2020] [Accepted: 04/28/2020] [Indexed: 12/28/2022]
Abstract
Superabsorbent hydrogels were synthesized from cassava starch (CS) and polyacrylamide (PAM) via radical polymerization. Scanning electron microscope revealed the porous structure of the hydrogels. Pore size was smaller at higher CS contents. Hydrogel containing 50 wt% CS (CS50) showed excellent water absorbency of >8000%, which was much greater than that of CS0 (pure PAM) hydrogel. This CS50 hydrogel removed >85% of methylene blue (MB) in <10 h with the greatest adsorption capacity of 2000 mg MB/g. The experimental results fitted the Freundlich and pseudo-second order models. After 4 cycles of use, the hydrogel could still remove >50% of MB in solution. Interestingly, the hydrogels were photodegradable and biodegradable. Buried in soil, the CS50 hydrogel was 80% degraded within 30 days whereas pure PAM was only 22% degraded.
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Affiliation(s)
- Kanda Junlapong
- Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90110
| | - Pattarawadee Maijan
- Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90110
| | - Chiraphon Chaibundit
- Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90110
| | - Sirinya Chantarak
- Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand, 90110.
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Boonsuk P, Kaewtatip K, Chantarak S, Kelarakis A, Chaibundit C. Super-tough biodegradable poly(vinyl alcohol)/poly(vinyl pyrrolidone) blends plasticized by glycerol and sorbitol. J Appl Polym Sci 2018. [DOI: 10.1002/app.46406] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Phetdaphat Boonsuk
- Department of Materials Science and Technology, Faculty of Science; Prince of Songkla University; Hat Yai, Songkhla 90110 Thailand
| | - Kaewta Kaewtatip
- Department of Materials Science and Technology, Faculty of Science; Prince of Songkla University; Hat Yai, Songkhla 90110 Thailand
| | - Sirinya Chantarak
- Department of Materials Science and Technology, Faculty of Science; Prince of Songkla University; Hat Yai, Songkhla 90110 Thailand
| | - Antonios Kelarakis
- Centre for Materials Science, School of Physical Sciences and Computing; University of Central Lancashire; Preston PR12HE United Kingdom
| | - Chiraphon Chaibundit
- Department of Materials Science and Technology, Faculty of Science; Prince of Songkla University; Hat Yai, Songkhla 90110 Thailand
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Ribeiro ME, de Moura CL, Vieira MG, Gramosa NV, Chaibundit C, de Mattos MC, Attwood D, Yeates SG, Nixon SK, Ricardo NM. Solubilisation capacity of Brij surfactants. Int J Pharm 2012; 436:631-5. [DOI: 10.1016/j.ijpharm.2012.07.032] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/17/2012] [Accepted: 07/19/2012] [Indexed: 10/28/2022]
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Ricardo NM, Ricardo NM, Costa FDM, Bezerra FW, Chaibundit C, Hermida-Merino D, Greenland BW, Burattini S, Hamley IW, Keith Nixon S, Yeates SG. Effect of water-soluble polymers, polyethylene glycol and poly(vinylpyrrolidone), on the gelation of aqueous micellar solutions of Pluronic copolymer F127. J Colloid Interface Sci 2012; 368:336-41. [DOI: 10.1016/j.jcis.2011.10.062] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 10/25/2011] [Accepted: 10/28/2011] [Indexed: 10/15/2022]
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Oliveira CP, Ribeiro MEN, Ricardo NM, Souza TVDP, Moura CL, Chaibundit C, Yeates SG, Nixon K, Attwood D. The effect of water-soluble polymers, PEG and PVP, on the solubilisation of griseofulvin in aqueous micellar solutions of Pluronic F127. Int J Pharm 2011; 421:252-7. [DOI: 10.1016/j.ijpharm.2011.10.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2011] [Revised: 09/26/2011] [Accepted: 10/01/2011] [Indexed: 10/16/2022]
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Chaibundit C, Ricardo NM, Ricardo NM, Muryn CA, Madec MB, Yeates SG, Booth C. Effect of ethanol on the gelation of aqueous solutions of Pluronic F127. J Colloid Interface Sci 2010; 351:190-6. [DOI: 10.1016/j.jcis.2010.07.023] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2010] [Revised: 07/09/2010] [Accepted: 07/10/2010] [Indexed: 10/19/2022]
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Chaibundit C, Ricardo NMPS, Ricardo NMPS, O'Driscoll BMD, Hamley IW, Yeates SG, Booth C. Aqueous gels of mixtures of ionic surfactant SDS with pluronic copolymers P123 or F127. Langmuir 2009; 25:13776-13783. [PMID: 19572512 DOI: 10.1021/la901584u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Gel diagrams based on tube inversion and oscillatory rheometry are reported for Pluronic copolymers F127 (E(98)P(67)E(98)) and P123 (E(21)P(67)E(21)) in mixtures with anionic surfactant sodium dodecyl sulfate (SDS). Total concentrations (c, SDS+copolymer) were as high as 50 wt % with mole ratios SDS/copolymer (mr) in the ranges 1-5 (F127) and 1-7 (P123). Temperatures were as high as 90 degrees C. Determination of the temperature dependences of the dynamic moduli served to confirm the gel boundaries from tube inversion and to reveal the high elastic moduli of the gels, e.g., compared at comparable positions in the gel phase, a 50 wt % SDS/P123 with mr = 7 had G' three times that of a corresponding gel of P123 alone. Small-angle X-ray scattering (SAXS) was used to show that the structures of all the SDS/F127 gels were bcc and that the structures of the SDS/P123 gels with mr = 1 were either fcc (c = 30 wt %) or hex (c = 40 wt %). Assignment of structures to SDS/P123 gels with values of mr in the range 3-7 was more difficult, as high-order scattering peaks could be very weak, and at the higher values of c and mr, the SAXS peaks included multiple reflections.
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Affiliation(s)
- Chiraphon Chaibundit
- Polymer Science Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112 Thailand
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Chaibundit C, Ricardo NMPS, Ricardo NMPS, de M L L Costa F, Wong MGP, Hermida-Merino D, Rodriguez-Perez J, Hamley IW, Yeates SG, Booth C. Effect of ethanol on the micellization and gelation of pluronic p123. Langmuir 2008; 24:12260-12266. [PMID: 18844386 DOI: 10.1021/la8022425] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
In certain applications copolymer P123 (E21P67E21) is dissolved in water-ethanol mixtures, initially to form micellar solutions and eventually to gel. For P123 in 10, 20, and 30 wt % aqueous ethanol we used dynamic light scattering from dilute solutions to confirm micellization, oscillatory rheometry, and visual observation of mobility (tube inversion) to determine gel formation in concentrated solutions and small-angle X-ray scattering (SAXS) to determine gel structure. Except for solutions in 30 wt % aqueous ethanol, a clear-turbid transition was encountered on heating dilute and concentrated micellar solutions alike, and as for solutions in water alone (Chaibundit et al. Langmuir 2007, 23, 9229) this could be ascribed to formation of wormlike micelles. Dense clouding, typical of phase separation, was observed at higher temperatures. Regions of isotropic and birefringent gel were defined for concentrated solutions and shown (by SAXS) to have cubic (fcc and hcp) and hexagonal structures, consistent with packed spherical and elongated micelles, respectively. The cubic gels (0, 10, and 20 wt % ethanol) were clear, while the hex gels were either turbid (0 and 10 wt % ethanol), turbid enclosing a clear region (20 wt % ethanol), or entirely clear (30 wt % ethanol). The SAXS profile was unchanged between turbid and clear regions of the 20 wt % ethanol gel. Temperature scans of dynamic moduli showed (as expected) a clear distinction between high-modulus cubic gels (G'max approximately 20-30 kPa) and lower modulus hex gels (G'max<10 kPa).
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Affiliation(s)
- Chiraphon Chaibundit
- Polymer Science Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90112 Thailand.
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Zhou Z, Chaibundit C, D’Emanuele A, Lennon K, Attwood D, Booth C. Solubilisation of drugs in worm-like micelles of block copolymers of ethylene oxide and 1,2-butylene oxide in aqueous solution. Int J Pharm 2008; 354:82-7. [DOI: 10.1016/j.ijpharm.2007.10.028] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2007] [Revised: 09/19/2007] [Accepted: 10/21/2007] [Indexed: 11/17/2022]
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Attwood D, Booth C, Yeates SG, Chaibundit C, Ricardo NMPS. Block copolymers for drug solubilisation: Relative hydrophobicities of polyether and polyester micelle-core-forming blocks. Int J Pharm 2007; 345:35-41. [PMID: 17869036 DOI: 10.1016/j.ijpharm.2007.07.039] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Revised: 07/24/2007] [Accepted: 07/31/2007] [Indexed: 11/16/2022]
Abstract
Published values of the critical micelle concentration are tabulated for diblock copolymers E(m)P(n), E(m)B(n), E(m)S(n), E(m)L(n), E(m)VL(n) and E(m)CL(n), where E denotes a chain unit derived from ethylene oxide, P from propylene oxide, B from 1,2-butylene oxide, S from styrene oxide, L from dl-lactide, VL from gamma-valerolactone and CL from epsilon-caprolactone, and the subscripts denote average chain lengths. Noting that log(cmc/moldm(-3) is proportional to the standard Gibbs energy of micellisation, the dependence of this quantity on hydrophobic block length (n) is explored for a given E-block length. Superposition of data allows ranking of the hydrophobicities of the chain units. The ratios relative to the least hydrophobic unit are: P : L : B : VL : S : CL = 1 : 4 : 6 : 10 : 12 : 12 Transitions in the slope of log(cmc) versus n are assigned to changes in the unimer-micelle equilibrium and related to the formation of unimolecular micelles and, at high values of n, to the completion of that process. The formation transition is seen in the plots for all the copolymers except the least hydrophobic, E(m)P(n). The completion transition is seen in the plots for E(m)CL(n) and E(m)L(n) copolymers, as these alone include results for copolymers with very lengthy hydrophobic blocks.
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Affiliation(s)
- David Attwood
- School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Manchester M13 9PL, UK.
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Chaibundit C, Ricardo NMPS, Costa FDMLL, Yeates SG, Booth C. Micellization and gelation of mixed copolymers P123 and F127 in aqueous solution. Langmuir 2007; 23:9229-36. [PMID: 17676776 DOI: 10.1021/la701157j] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The micellization in dilute aqueous solution of Pluronic copolymers P123 (E21P67E21) and F127 (E98P67E98) and mixtures of the two was investigated using static and dynamic light scattering. Gelation of concentrated solutions of the two copolymers and their mixtures was studied using tube inversion and oscillatory rheometry. The two copolymers comicellized to give micelles with narrow size distributions. Clouding temperatures and critical micelle temperatures decreased as the proportion of P123 in the mixture was increased. Micelle association numbers of the mixed micelles lay between the values found for micelles of P123 and F127 alone, whereas micelle radii passed through maximum values in the range 0-50 wt % P123. As judged by the ratio of the thermodynamic to the hydrodynamic radius, the micelle interaction potential changes gradually from soft to hard as the proportion of P123 in the mixture is increased. Regions of cubic and hexagonal (birefringent) gel were defined for concentrated solutions. The high-temperature boundary of the 30 wt % cubic gel decreased monotonically from 90 to 43 degrees C as the proportion of P123 in the mixture was increased from 0 to 100 wt %, whereas the low-temperature boundary was essentially constant at 15 +/- 3 degrees C. Increasing the proportion of P123 in the mixture at 25 degrees C increased the concentration at which the cubic gel was first formed and decreased the concentration at which the hexagonal gel was first formed.
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Affiliation(s)
- Chiraphon Chaibundit
- Polymer Science Program, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, Thailand.
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Kelarakis A, Havredaki V, Yuan XF, Chaibundit C, Booth C. Aqueous Gels of Triblock Copolymers of Ethylene Oxide and 1,2-Butylene Oxide (Type BEB) Studied by Rheometry. MACROMOL CHEM PHYS 2006. [DOI: 10.1002/macp.200600028] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Ricardo NMPS, Chaibundit C, Yang Z, Attwood D, Booth C. Association behavior of mixed triblock copoly(oxyalkylene)s (type EBE and ESE) in aqueous solution. Langmuir 2006; 22:1301-6. [PMID: 16430297 DOI: 10.1021/la052338i] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The micellization of binary mixtures of water-soluble block copolymers E(m)B(n)E(m) and E(m)S(n)E(m) in dilute solution was investigated by light-scattering methods. We use the notation E, B, and S to denote chain units derived, respectively, from ethylene oxide, butylene oxide, and styrene oxide and the subscripts to denote number-average chain lengths in chain units. Two distinct distributions of micelles were formed in solutions of a 50:50 wt % mixture of copolymers E64B20E64 and E137S18E137, which had hydrophobic blocks of similar length but very different hydrophobicity. One distribution of micelles was formed in solutions of a mixture (50:50 wt %) of copolymers E135B20E135 and E82S9E82, which had hydrophobic blocks of different length but similar hydrophobicity. In this case, the properties of the micelles formed in solutions of the mixture were very similar to those of micelles of E82S9E82 alone. This result extended to concentrated solutions, because the hard-gel boundary for the mixture proved to be very similar to that of solutions of E82S9E82 alone.
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Affiliation(s)
- Nágila M P S Ricardo
- Department of Organic and Inorganic Chemistry, Federal University of Ceará, CX 12200 Fortaleza, Brazil.
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Crothers M, Zhou Z, Ricardo NMPS, Yang Z, Taboada P, Chaibundit C, Attwood D, Booth C. Solubilisation in aqueous micellar solutions of block copoly(oxyalkylene)s. Int J Pharm 2005; 293:91-100. [PMID: 15778048 DOI: 10.1016/j.ijpharm.2004.12.005] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2004] [Revised: 12/06/2004] [Accepted: 12/13/2004] [Indexed: 11/21/2022]
Abstract
The solubilisation capacities of micellar solutions of diblock and triblock copolymers composed of hydrophilic poly(ethylene oxide) and hydrophobic poly(styrene oxide) have been compared using the poorly water-soluble drug griseofulvin as a model solubilisate. Our results showed an increase of solubilisation capacity (expressed as mg griseofulvin per gram of hydrophobic block) with temperature and, for spherical micelles, with core volume before reaching limiting values. A change of micelle shape from spherical to cylindrical (or worm-like) resulting from an increase in micelle aggregation number was accompanied by a further enhancement of solubilisation capacity. Comparison with the solubilisation of the same drug in micellar solutions of block copolymers of poly(ethylene oxide) and poly(1,2-butylene oxide) showed that the solubilisation capacity of a poly(styrene oxide) block was approximately four times that of a poly(1,2-butylene oxide) block for spherical micelles. Solubilisation capacity at 25 degrees C was approximately doubled when griseofulvin was incorporated into a copolymer melt and micelles initially formed from the drug-loaded melt at 65 degrees C rather than by loading the drug into pre-micellised solution at 25 degrees C in the usual manner.
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Affiliation(s)
- Michael Crothers
- School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Manchester M13 9PL, UK
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Chaibundit C, Sumanatrakool P, Chinchew S, Kanatharana P, Tattershall CE, Booth C, Yuan XF. Association properties of diblock copolymer of ethylene oxide and 1,2-butylene oxide: E17B12 in aqueous solution. J Colloid Interface Sci 2005; 283:544-54. [PMID: 15721932 DOI: 10.1016/j.jcis.2004.09.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Accepted: 09/02/2004] [Indexed: 11/18/2022]
Abstract
Copolymer E(17)B(12) (E denotes OCH(2)CH(2), B denotes OCH(2)CH(C(2)H(5)), and the subscripts denote number-average chain lengths) was prepared by sequential oxyanionic polymerization and characterized by GPC (for distribution width) and NMR spectroscopy (for absolute composition and chain length). Dynamic and static light scattering and rheometry were used to characterize micelles in dilute solution and demonstrate the formation of compact micelles at low temperatures and of elongated micelles at higher temperatures, the latter being accompanied by turbidity of the solution. Rheological methods applied across a range of concentrations and temperatures served to demonstrate the formation of worm-like micelles. Gels based on entangled worm-like micelles (some of them turbid) and on packed compact micelles were identified and their properties were explored.
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Affiliation(s)
- Chiraphon Chaibundit
- Polymer Science Program, Faculty of Science, Prince of Songkla University, Had Yai, Songkhla 90112, Thailand.
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Viras K, Mai SM, Ryan AJ, Yu GE, Booth C, Chaibundit C. Low-Frequency Raman Spectroscopy of Oxyethylene/Oxybutylene/Oxyethylene Triblock Copolymers. Macromolecules 2004. [DOI: 10.1021/ma0359842] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kyriakos Viras
- National and Kapodistrian University of Athens, Department of Chemistry, Physical Chemistry Laboratory, Panepistimiopolis, 157 71 Athens, Greece
| | | | | | | | | | - Chiraphon Chaibundit
- Polymer Science Program, Faculty of Science, Prince of Songkla University, Had Yai, Songkhla, 90112, Thailand
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Chaibundit C, Mingvanish W, Booth C, Mai SM, Turner SC, Fairclough JPA, Ryan AJ, Pissis P. Effect of Architecture on the Crystal Morphology of Block Copolymers. Small-Angle X-ray Scattering and Differential Scanning Calorimetry. Macromolecules 2002. [DOI: 10.1021/ma0201680] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Polycarpos Pissis
- Physics Department, National Technical University of Athens, Zografou Campus, 15780 Athens, Greece
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Mingvanish W, Chaibundit C, Booth C. Mixed micellisation of oxyethylene–oxybutylene diblock and triblock copolymers in water studied by light scattering. Phys Chem Chem Phys 2002. [DOI: 10.1039/b109634f] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mai SM, Mingvanish W, Turner SC, Chaibundit C, Fairclough JPA, Heatley F, Matsen MW, Ryan AJ, Booth C. Microphase-Separation Behavior of Triblock Copolymer Melts. Comparison with Diblock Copolymer Melts. Macromolecules 2000. [DOI: 10.1021/ma000154z] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shao-Min Mai
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Withawat Mingvanish
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Simon C. Turner
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Chiraphon Chaibundit
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - J. Patrick A. Fairclough
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Frank Heatley
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Mark W. Matsen
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Anthony J. Ryan
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
| | - Colin Booth
- Manchester Polymer Centre and Department of Chemistry, University of Manchester, Manchester M13 9PL, UK, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, UK, and Polymer Science Centre, University of Reading, Whiteknights, Reading RG6 6AF, UK
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