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Dulong V, Thebault P, Karakasyan C, Picton L, le Cerf D. Polyelectrolyte complexes of chitosan and hyaluronic acid or carboxymethylpullulan and their aminoguaiacol derivatives with biological activities as potential drug delivery systems. Carbohydr Polym 2024; 341:122330. [PMID: 38876726 DOI: 10.1016/j.carbpol.2024.122330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 05/02/2024] [Accepted: 05/25/2024] [Indexed: 06/16/2024]
Abstract
Polyelectrolyte complexes (PECs) were elaborated from chitosan as cationic polymer and carboxy-methylpullulan (CMP), hyaluronic acid (HA) and their derivatives grafted with aminoguaiacol (G) with different degrees of substitution (DSGA) with the aim of obtaining nanogels for drug delivery. For each couple of polysaccharides, the charge ratios giving the smaller size with the lower PDI were selected to produce PECs. CMP_CHIT and CMP-G_CHIT PECs had smaller sizes (220-280 nm) than HA_CHIT and HA-G_CHIT PECs (280-390 nm). PECs were stable at 4 °C during 28 days at pH 5. In phosphate buffer saline (PBS) at pH 7.4, at 4 °C, a better stability of PECs based on CMP-G derivatives was observed. The hydrophobic associations between aminoguaiacol groups (highlighted by measurements of pyrene fluorescence) led to a better PECs' stabilization in PBS. The PECs' antioxidant and antibacterial activities were demonstrated and related to the DSGA. Diclofenac and curcumin were used as drug models: their loading reached 260 and 53 μg/mg PEC, respectively. The release of diclofenac in PBS at 37 °C followed a quasi-Fickian diffusion mechanism with release constant between 0.88 and 1.04 h-1. The curcumin release followed a slow linear increase in PBS/EtOH (60/40 V/V) with an effect of DSGA.
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Affiliation(s)
- Virginie Dulong
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France.
| | - Pascal Thebault
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Carole Karakasyan
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Luc Picton
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
| | - Didier le Cerf
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, UMR 6270 PBS, 76000 Rouen, France
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2
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Morel M, Madau M, Le Cerf D, Dulong V, Groo AC, Malzert-Fréon A, Picton L. Injectable polyoxazoline grafted hyaluronic acid thermoresponsive hydrogels for biomedical applications. J Mater Chem B 2024; 12:2807-2817. [PMID: 38404247 DOI: 10.1039/d3tb02108d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Injectable thermosensitive hydrogels based on hyaluronic acid (HA) grafted with lower critical solution temperature (LCST) polyoxazoline (copolymers of poly(isopropyl-co-butyl oxazoline)) or P(iPrOx-co-BuOx) have been elaborated with tunable solution/gel temperature transitions and gel state elastic modulus. A suitable HA-g-P(iPrOx-co-BuOx-67/33)-0.10 sample with an iPrOx/BuOx ratio of 67/33, a polymerization degree (DP) of 25, a substitution degree (DS) of 10%, and displaying thermally induced gelling character with elastic (G') and viscous (G'') moduli crossover points at 25 °C and a G' at 37 °C around 80 Pa has been chosen for medical application. Hydrogels obtained with HA-g-P(iPrOx-co-BuOx-67/33)-0.10 exhibited high stability at 37 °C and excellent injectability properties with full and quick reversibility. The incorporation of a secondary network (HA), until 35 wt%, into the thermosensitive hydrogel also demonstrated very good stability and injectability.
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Affiliation(s)
- Morgane Morel
- Univ Rouen Normandie, CNRS, PBS UMR6270, F-76000 Rouen, France.
- Univ Caen Normandie, CERMN, UR4258, F-14000 Caen, France
| | - Mathieu Madau
- Univ Rouen Normandie, CNRS, PBS UMR6270, F-76000 Rouen, France.
| | - Didier Le Cerf
- Univ Rouen Normandie, CNRS, PBS UMR6270, F-76000 Rouen, France.
| | - Virginie Dulong
- Univ Rouen Normandie, CNRS, PBS UMR6270, F-76000 Rouen, France.
| | | | | | - Luc Picton
- Univ Rouen Normandie, CNRS, PBS UMR6270, F-76000 Rouen, France.
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Le HV, Dulong V, Picton L, Le Cerf D. Thermoresponsive nanogels based on polyelectrolyte complexes between polycations and functionalized hyaluronic acid. Carbohydr Polym 2022; 292:119711. [PMID: 35725187 DOI: 10.1016/j.carbpol.2022.119711] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/03/2022] [Accepted: 06/03/2022] [Indexed: 11/17/2022]
Abstract
A novel kind of thermoresponsive polyelectrolyte complex-based nanogels (PEC-NGs) was elaborated by mixing hyaluronic acid (HA) functionalized with Jeffamine® M-2005 (M2005, a thermoresponsive amine-terminated polyether) and diethylaminoethyl dextran (DEAE-D) or poly-l-lysine (PLL) in water. The presence of M2005 grafts led to PEC-NGs with larger particle size, lower net surface charge and thermoresponsiveness, namely shrinkage with increasing hydrophobicity at higher temperature. Both M2005 grafts and replacing DEAE-D with PLL as polycation allowed PEC-NGs to have higher stability against salinity and better encapsulation of curcumin, most probably through intraparticle hydrophobic interactions, whereas interparticle hydrophobic interactions may facilitate particle aggregation over time. Curcumin encapsulation can be optimized by applying higher temperature during the complexation. Enzymatic degradability of PEC-NGs was also verified through particle size evolution in the presence of hyaluronidase. These results provide new insights into the physicochemical aspect of such systems as promising nanocarriers for drug delivery.
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Affiliation(s)
- Huu Van Le
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Virginie Dulong
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Luc Picton
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS UMR 6270, 76000 Rouen, France
| | - Didier Le Cerf
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS UMR 6270, 76000 Rouen, France.
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Wu Z, Li H, Zhao X, Ye F, Zhao G. Hydrophobically modified polysaccharides and their self-assembled systems: A review on structures and food applications. Carbohydr Polym 2022; 284:119182. [DOI: 10.1016/j.carbpol.2022.119182] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 12/27/2021] [Accepted: 01/21/2022] [Indexed: 01/05/2023]
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Thermo-responsive hydrogels from hyaluronic acid functionalized with poly(2-alkyl-2-oxazoline) copolymers with tuneable transition temperature. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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6
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Madau M, Morandi G, Rihouey C, Lapinte V, Oulyadi H, LE Cerf D, Dulong V, Picton L. A mild and straightforward one-pot hyaluronic acid functionalization through termination of poly-(2-alkyl-2-oxazoline). POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Madau M, Le Cerf D, Dulong V, Picton L. Hyaluronic Acid Functionalization with Jeffamine ® M2005: A Comparison of the Thermo-Responsiveness Properties of the Hydrogel Obtained through Two Different Synthesis Routes. Gels 2021; 7:88. [PMID: 34287299 PMCID: PMC8293199 DOI: 10.3390/gels7030088] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 11/16/2022] Open
Abstract
Hyaluronic acid (HA) of different molar masses (respectively 38,000, 140,000 and 1,200,000 g.mol-1) have been functionalized with a commercial poly(etheramine), Jeffamine® M2005, in order to devise physical thermo-responsive hydrogels. Two routes have been studied, involving the use of either water for the first one or of N,N'-Dimethylformamide (DMF), a polar aprotic solvent, for the second one. In the case of the water route, the reaction was performed using a mixture of N-(3-Dimethylaminopropyl)-N'-ethylcarbodiimide (EDC) and N-hydroxysuccinimide (NHS) as coupling reagents. The reaction was optimized while making sure no free M2005 remained in the final material, leading to M2005 grafting degrees of about 4%, which enabled the formation of hydrogels by increasing the temperature. In the case of the organic solvent route, propylphosphonic anhydride T3P® was used as a coupling reagent in DMF, resulting in a M2005 grafting degree of around 8% with better thermo-responsive properties of HA-g-M2005 compared to those obtained when the reaction was performed in water. However, the reaction systematically led to covalent cross-linking in the case of the HA, with the highest starting molar masses resulting in a very different rheological behaviour and with higher gel strength retaining thermo-responsive behaviour but being only poorly soluble in water.
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Affiliation(s)
| | - Didier Le Cerf
- Laboratoire Polymères Biopolymères Surfaces (PBS), Normandie University, UNIROUEN, INSA Rouen, CNRS, 76000 Rouen, France; (M.M.); (V.D.); (L.P.)
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Dulong V, Morel M, Labat B, Picton L, Le Cerf D. Microgels Based on Carboxymethylpullulan Grafted with Ferulic Acid Obtained by Enzymatic Crosslinking in Emulsion for Drug Delivery Systems. Macromol Biosci 2021; 21:e2100165. [PMID: 34174176 DOI: 10.1002/mabi.202100165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Indexed: 11/12/2022]
Abstract
Carboxymethylpullulan (CMP) grafted with ferulic acid (FA) is crosslinked with laccase by the reverse water-in-oil emulsion technique (with sunflower oil) to obtain microgels with size from 40 to 200 µm. It is demonstrated that laccase activity and dispersion time have an impact on microgels' size. Fluorescence spectroscopy of different probes (e.g., pyrene, Nile red, and curcumin) shows the nonpolar characteristics of hydrophobic microdomains formed by the FA moieties and its dimers forming the crosslinking nodes. Encapsulation and release of curcumin or lidocaine used as drug models are studied in different buffers. Curcumin is well encapsulated but retained in microgels, while lidocaine is released at 65-70% in 2 h and 30 min in buffer simulating the gastrointestinal tract and at 75-85% in 1 h in acetate buffer pH 5.6 or phosphate-buffered saline (PBS) pH 6.9.
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Affiliation(s)
- Virginie Dulong
- UNIROUEN, INSA Rouen, Normandie Univ., CNRS, PBS, Rouen, 76000, France
| | - Morgane Morel
- UNIROUEN, INSA Rouen, Normandie Univ., CNRS, PBS, Rouen, 76000, France
| | - Béatrice Labat
- UNIROUEN, INSA Rouen, Normandie Univ., CNRS, PBS, Rouen, 76000, France
| | - Luc Picton
- UNIROUEN, INSA Rouen, Normandie Univ., CNRS, PBS, Rouen, 76000, France
| | - Didier Le Cerf
- UNIROUEN, INSA Rouen, Normandie Univ., CNRS, PBS, Rouen, 76000, France
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Zhang J, Liarou E, Town J, Li Y, Wemyss AM, Haddleton DM. Aqueous copper-mediated reversible deactivation radical polymerization (RDRP) utilizing polyetheramine derived initiators. Polym Chem 2020. [DOI: 10.1039/d0py00555j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Polyetheramines (Jeffamines™) are used in Copper-mediated reversible deactivation radical polymeriation (Cu-RDRP) in water for the synthesis of temperature-responsive block copolymers.
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Affiliation(s)
- Jirui Zhang
- Department of Chemistry
- University of Warwick
- Coventry
- UK
| | | | - James Town
- Department of Chemistry
- University of Warwick
- Coventry
- UK
| | - Yongguang Li
- Department of Chemistry
- University of Warwick
- Coventry
- UK
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de Lima BLB, Marques NDN, Villetti MA, Balaban RDC. HPAM-g
-PEOPPO: Rheological modifiers in aqueous media of high temperature and high ionic strength. J Appl Polym Sci 2019. [DOI: 10.1002/app.47453] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bruna Luiza Batista de Lima
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
| | - Nívia do Nascimento Marques
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
| | - Marcos Antônio Villetti
- Laboratório de Espectroscopia de Polímeros - LEPOL; Universidade Federal de Santa Maria; 97105-900 Santa Maria Rio Grande do Sul Brazil
| | - Rosangela de Carvalho Balaban
- Laboratório de Pesquisa em Petróleo - LAPET; Universidade Federal do Rio Grande do Norte; 59078970 Natal Rio Grande do Norte Brazil
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11
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Pereira BHDA, Marques NDN, Lima BLBD, Villetti MA, Balaban RDC. Study of the thermoassociative process in carboxymethylcellulose derivatives. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.10.126] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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12
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Tabasum S, Noreen A, Maqsood MF, Umar H, Akram N, Nazli ZIH, Chatha SAS, Zia KM. A review on versatile applications of blends and composites of pullulan with natural and synthetic polymers. Int J Biol Macromol 2018; 120:603-632. [DOI: 10.1016/j.ijbiomac.2018.07.154] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Revised: 07/17/2018] [Accepted: 07/24/2018] [Indexed: 02/07/2023]
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13
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Mzoughi Z, Abdelhamid A, Rihouey C, Le Cerf D, Bouraoui A, Majdoub H. Optimized extraction of pectin-like polysaccharide from Suaeda fruticosa leaves: Characterization, antioxidant, anti-inflammatory and analgesic activities. Carbohydr Polym 2018; 185:127-137. [DOI: 10.1016/j.carbpol.2018.01.022] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 01/05/2018] [Accepted: 01/05/2018] [Indexed: 02/04/2023]
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14
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Marques NDN, Balaban RDC, Halila S, Borsali R. Synthesis and characterization of carboxymethylcellulose grafted with thermoresponsive side chains of high LCST: The high temperature and high salinity self-assembly dependence. Carbohydr Polym 2018; 184:108-117. [DOI: 10.1016/j.carbpol.2017.12.053] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 12/06/2017] [Accepted: 12/19/2017] [Indexed: 12/30/2022]
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15
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Herrera-Morales J, Morales K, Ramos D, Ortiz-Quiles EO, López-Encarnación JM, Nicolau E. Examining the Use of Nanocellulose Composites for the Sorption of Contaminants of Emerging Concern: An Experimental and Computational Study. ACS OMEGA 2017; 2:7714-7722. [PMID: 31457328 PMCID: PMC6645408 DOI: 10.1021/acsomega.7b01053] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/30/2017] [Indexed: 06/10/2023]
Abstract
The occurrence of contaminants of emerging concern (CECs) in water is an environmental issue that must be addressed to avoid damage to ecosystems and human health. Inspired by this current issue, in this work, we fabricated nanocellulose (NC) particles grafted with the block copolymer Jeffamine ED 600 (NC-Jeffamine) capable of adsorbing acetaminophen, sulfamethoxazole, and N,N-diethyl-meta-toluamide (DEET) from aqueous solution by electrostatic interactions. NC-Jeffamine composites were prepared by carboxylation of the NC surface via 2,2,6,6-tetramethyl-1-piperidinyloxy oxidation followed by the covalent attachment of Jeffamine using the N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide/N-hydroxysulfosuccinimide sodium salt reaction. The reaction was followed and confirmed by Fourier transform infrared and conductometric titration. The physical characterization was performed by thermogravimetric analysis, Brunauer-Emmett-Teller analysis, scanning electron microscopy, dynamic light scattering, and Z-potential analysis. This material was used to study the adsorption profile of three CECs in deionized water, namely, acetaminophen, sulfamethoxazole, and DEET. The adsorption isotherms were obtained at pH 3, 7, and 9, where the best adsorption results corresponded to pH 9 because of the uniform dispersion of the adsorbate in solution. A computational study based on the density functional theory determined that the possible interactions of the CECs with the adsorbent material were related to hydrogen bonds and/or van der Waals forces. The calculated binding energies were used as a descriptor to characterize the optimum adsorption site of CECs onto NC-Jeffamine.
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Affiliation(s)
- Jairo Herrera-Morales
- Department
of Chemistry, University of Puerto Rico, Rio Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States
- Molecular
Sciences Research Center, University of
Puerto Rico, 1390 Ponce
De Leon Avenue, Suite 2, San Juan, Puerto Rico 00931-3346, United States
| | - Kathleen Morales
- Molecular
Sciences Research Center, University of
Puerto Rico, 1390 Ponce
De Leon Avenue, Suite 2, San Juan, Puerto Rico 00931-3346, United States
| | - Damarys Ramos
- Department
of Chemistry, University of Puerto Rico, Rio Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States
- Molecular
Sciences Research Center, University of
Puerto Rico, 1390 Ponce
De Leon Avenue, Suite 2, San Juan, Puerto Rico 00931-3346, United States
| | - Edwin O. Ortiz-Quiles
- Department
of Chemistry, University of Puerto Rico, Rio Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States
- Molecular
Sciences Research Center, University of
Puerto Rico, 1390 Ponce
De Leon Avenue, Suite 2, San Juan, Puerto Rico 00931-3346, United States
| | - Juan M. López-Encarnación
- Department
of Mathematics-Physics, University of Puerto
Rico, Cayey Campus, Cayey, Puerto Rico 00736, United States
| | - Eduardo Nicolau
- Department
of Chemistry, University of Puerto Rico, Rio Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States
- Molecular
Sciences Research Center, University of
Puerto Rico, 1390 Ponce
De Leon Avenue, Suite 2, San Juan, Puerto Rico 00931-3346, United States
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Kouassi MC, Thébault P, Rihouey C, Dé E, Labat B, Picton L, Dulong V. Carboxymethylpullulan Grafted with Aminoguaiacol: Synthesis, Characterization, and Assessment of Antibacterial and Antioxidant Properties. Biomacromolecules 2017; 18:3238-3251. [DOI: 10.1021/acs.biomac.7b00899] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marie-Carole Kouassi
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Pascal Thébault
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Christophe Rihouey
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Emmanuelle Dé
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Béatrice Labat
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Luc Picton
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Virginie Dulong
- Laboratory Polymères, Biopolymères, Surfaces, Normandie Univ, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
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Bhattacharjee RR, S T, Mal SS. A Liquid Derivative of Phosphotungstic Acid as Catalyst for Benzyl Alcohol Oxidation in Water: Facile Separation and Stability of Benzaldehyde at Room Temperature †. ChemistrySelect 2017. [DOI: 10.1002/slct.201700443] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Thangamani S
- PSG Institute of Advanced Studies, Coimbatore; Tamil Nadu- 641004 India
| | - Sib S. Mal
- National Institute of Technology, Dept. of Chemistry, Surathkal; Karnataka- 575025 India
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Morelli L, Cappelluti MA, Ricotti L, Lenardi C, Gerges I. An Injectable System for Local and Sustained Release of Antimicrobial Agents in the Periodontal Pocket. Macromol Biosci 2017; 17. [PMID: 28464538 DOI: 10.1002/mabi.201700103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Indexed: 01/22/2023]
Abstract
Periodontitis treatments usually require local administration of antimicrobial drugs with the aim to reduce the bacterial load inside the periodontal pocket. Effective pharmaceutical treatments may require sustained local drug release for several days in the site of interest. Currently available solutions are still not able to fulfill the clinical need for high-quality treatments, mainly in terms of release profiles and patients' comfort. This work aims to fill this gap through the development of an in situ gelling system, capable to achieve controlled and sustained release of antimicrobial agents for medium-to-long-term treatments. The system is composed of micrometer-sized β-cyclodextrin-based hydrogel (bCD-Jef-MPs), featured by a strong hydrophilic character, suspended in a synthetic block-co-polymer solution (Poloxamer 407), which is capable to undergo rapid thermally induced sol-gel phase transition at body temperature. The chemical structure of bCD-Jef-MPs was confirmed by cross-correlating data from Fourier transform infrared (FTIR) spectroscopy, swelling test, and degradation kinetics. The thermally induced sol-gel phase transition is demonstrated by rheometric tests. The effectiveness of the described system to achieve sustained release of antimicrobial agents is demonstrated in vitro, using chlorhexidine digluconate as a drug model. The results achieved in this work disclose the potential of the mentioned system in effectively treating periodontitis lesions.
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Affiliation(s)
- Laura Morelli
- Filarete Foundation, Viale Ortles 22/4, 20139, Milano, Italy
| | | | - Leonardo Ricotti
- The BioRobotics Institute, Scuola Superiore Sant'Anna, viale R. Piaggio 34, 56025, Pontedera Pisa, Italy
| | - Cristina Lenardi
- Filarete Foundation, Viale Ortles 22/4, 20139, Milano, Italy
- CIMAINA and Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, 20133, Milano, Italy
| | - Irini Gerges
- Tensive S.r.l., Via Timavo 34, 20124, Milano, Italy
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Dulong V, Hadrich A, Picton L, Le Cerf D. Enzymatic cross-linking of carboxymethylpullulan grafted with ferulic acid. Carbohydr Polym 2016; 151:78-87. [DOI: 10.1016/j.carbpol.2016.05.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 05/12/2016] [Accepted: 05/16/2016] [Indexed: 11/25/2022]
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20
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Synthesis, characterization and swelling investigations of novel polyetheramine-based hydrogels. Polym Bull (Berl) 2016. [DOI: 10.1007/s00289-016-1751-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Vulpe R, Le Cerf D, Dulong V, Popa M, Peptu C, Verestiuc L, Picton L. Rheological study of in-situ crosslinkable hydrogels based on hyaluronanic acid, collagen and sericin. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 69:388-97. [PMID: 27612727 DOI: 10.1016/j.msec.2016.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 06/06/2016] [Accepted: 07/04/2016] [Indexed: 01/10/2023]
Abstract
The elaboration of chemically crosslinked hydrogels based on collagen (C), hyaluronanic acid (HA) and sericin (S) with different polymer ratios was investigated by in-situ rheology. This reaction was performed via amide or ester bond reaction activated by carbodiimide, in pure water. Prior to molecule crosslinking, the rheological behaviour of the biopolymers (alone or in mixture) was characterized in a semi-dilute concentration regime. Both flow and dynamic measurements showed that uncrosslinked collagen alone appears to be rather elastic with yield stress properties, whereas uncrosslinked HA alone appears to be rather shear thinning and viscoelastic in agreement with entangled polymer behaviour. Sericin exhibited Newtonian low viscosity behaviour according to its very low molar mass. Before crosslinking, HA exhibited viscoelastic behaviour at concentrations above the critical entangled concentration (C*) in the mixtures, thus HA shows promise as a matrix for future crosslinked networks, whereas sericin did not significantly modify the rheology. During the reaction, followed by rheology, the kinetics were slower for pure HA systems compared with the mixtures (i.e., with added collagen and/or to a lesser extent sericin). At the same time, the final network of hydrogels (i.e., the elastic modulus) was more structured in the mixture based systems. This result is explained by ester bonds (the only possibility for pure HA systems), which are less favourable and reactive than amide bonds (possible with sericin and collagen). The presence of collagen in the HA matrix reinforced the hydrogel network. SEM studies confirmed the structure of the hydrogels, and in vitro degradability was globally consistent with the effect of the selected enzyme according to the hydrogel composition. All the elaborated hydrogels were non-cytotoxic in vitro.
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Affiliation(s)
- Raluca Vulpe
- "Gheorghe Asachi" Technical University, Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, 73 Prof. Dr. docent Dimitrie Mangeron Street, 700050 Iasi, Romania; Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France
| | - Didier Le Cerf
- Normandie Université, France; Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France; CNRS UMR 6270 & FR3038, F-76821 Mont Saint Aignan, France
| | - Virginie Dulong
- Normandie Université, France; Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France; CNRS UMR 6270 & FR3038, F-76821 Mont Saint Aignan, France
| | - Marcel Popa
- "Gheorghe Asachi" Technical University, Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, 73 Prof. Dr. docent Dimitrie Mangeron Street, 700050 Iasi, Romania; Academy of Romanian Scientists, Splaiul Independentei, 54, Sector 5, 050094, Bucuresti, Romania; "Apollonia" University of Iași, Faculty of Dental Medicine, Muzicii Avenue, 2, 700399, Iasi, Romania
| | - Catalina Peptu
- "Gheorghe Asachi" Technical University, Faculty of Chemical Engineering and Environmental Protection, Department of Natural and Synthetic Polymers, 73 Prof. Dr. docent Dimitrie Mangeron Street, 700050 Iasi, Romania
| | - Liliana Verestiuc
- "Grigore T. Popa" University of Medicine and Pharmacy, Faculty of Medical Bioengineering, Department of Biological Sciences, 9-13 Kogalniceanu Street, 700454 Iasi, Romania
| | - Luc Picton
- Normandie Université, France; Université de Rouen, Laboratoire Polymères Biopolymères Surfaces, F-76821 Mont Saint Aignan, France; CNRS UMR 6270 & FR3038, F-76821 Mont Saint Aignan, France.
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Stöhr A, Tabatabai M, Favresse P, Roland K, Ritter H. Iron salen-catalysed oxidative coupling of phenol derivatives: formaldehyde-free access to amphiphilic polymers. POLYM INT 2016. [DOI: 10.1002/pi.5089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Antonia Stöhr
- Institute of Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-University of Düsseldorf; Universitaetsstrasse 1 40225 Düsseldorf Germany
| | - Monir Tabatabai
- Institute of Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-University of Düsseldorf; Universitaetsstrasse 1 40225 Düsseldorf Germany
| | - Philippe Favresse
- Coatings & Additives, Evonik Industries AG; Goldschmidtstraße 100 45127 Essen Germany
| | - Katrin Roland
- Coatings & Additives, Evonik Industries AG; Goldschmidtstraße 100 45127 Essen Germany
| | - Helmut Ritter
- Institute of Organic Chemistry and Macromolecular Chemistry; Heinrich-Heine-University of Düsseldorf; Universitaetsstrasse 1 40225 Düsseldorf Germany
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Niang PM, Huang Z, Dulong V, Souguir Z, Le Cerf D, Picton L. Thermo-controlled rheology of electro-assembled polyanionic polysaccharide (alginate) and polycationic thermo-sensitive polymers. Carbohydr Polym 2016; 139:67-74. [DOI: 10.1016/j.carbpol.2015.12.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/12/2015] [Accepted: 12/08/2015] [Indexed: 10/22/2022]
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Moscovici M. Present and future medical applications of microbial exopolysaccharides. Front Microbiol 2015; 6:1012. [PMID: 26483763 PMCID: PMC4586455 DOI: 10.3389/fmicb.2015.01012] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 09/07/2015] [Indexed: 11/13/2022] Open
Abstract
Microbial exopolysaccharides (EPS) have found outstanding medical applications since the mid-20th century, with the first clinical trials on dextran solutions as plasma expanders. Other EPS entered medicine firstly as conventional pharmaceutical excipients (e.g., xanthan - as suspension stabilizer, or pullulan - in capsules and oral care products). Polysaccharides, initially obtained from plant or animal sources, became easily available for a wide range of applications, especially when they were commercially produced by microbial fermentation. Alginates are used as anti-reflux, dental impressions, or as matrix for tablets. Hyaluronic acid and derivatives are used in surgery, arthritis treatment, or wound healing. Bacterial cellulose is applied in wound dressings or scaffolds for tissue engineering. The development of drug controlled-release systems and of micro- and nanoparticulated ones, has opened a new era of medical applications for biopolymers. EPS and their derivatives are well-suited potentially non-toxic, biodegradable drug carriers. Such systems concern rating and targeting of controlled release. Their large area of applications is explained by the available manifold series of derivatives, whose useful properties can be thereby controlled. From matrix inclusion to conjugates, different systems have been designed to solubilize, and to assure stable transport in the body, target accumulation and variable rate-release of a drug substance. From controlled drug delivery, EPS potential applications expanded to vaccine adjuvants and diagnostic imaging systems. Other potential applications are related to the bioactive (immunomodulator, antitumor, antiviral) characteristics of EPS. The numerous potential applications still wait to be developed into commercial pharmaceuticals and medical devices. Based on previous and recent results in important medical-pharmaceutical domains, one can undoubtedly state that EPS medical applications have a broad future ahead.
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Affiliation(s)
- Misu Moscovici
- National Institute for Chemical Pharmaceutical Research and Development, BucharestRomania
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25
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Karakasyan C, Mathos J, Lack S, Davy J, Marquis M, Renard D. Microfluidics-assisted generation of stimuli-responsive hydrogels based on alginates incorporated with thermo-responsive and amphiphilic polymers as novel biomaterials. Colloids Surf B Biointerfaces 2015; 135:619-629. [PMID: 26322476 DOI: 10.1016/j.colsurfb.2015.08.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Revised: 06/19/2015] [Accepted: 08/19/2015] [Indexed: 01/30/2023]
Abstract
We used a droplet-based microfluidics technique to produce monodisperse responsive alginate-block-polyetheramine copolymer microgels. The polyetheramine group (PEA), corresponding to a propylene oxide /ethylene oxide ratio (PO/EO) of 29/6 (Jeffamine(®) M2005), was condensed, via the amine link, to alginates with various mannuronic/guluronic acids ratios and using two alginate:jeffamine mass ratios. The size of the grafted-alginate microgels varied from 60 to 80 μm depending on the type of alginate used and the degree of substitution. The droplet-based microfluidics technique offered exquisite control of both the dimension and physical chemical properties of the grafted-alginate microgels. These microgels were therefore comparable to isolated grafted-alginate chains in retaining both their amphiphilic and thermo-sensitive properties. Amphiphilicity was demonstrated at the oil-water interface where grafted-alginate microgels were found to decrease interfacial tension by ∼ 50%. The thermo-sensitivity of microgels was clearly demonstrated and a 10 to 20% reduction in size between was evidenced on increasing the temperature above the lower critical solution temperature (TLCST) of Jeffamine. In addition, the reversibility of thermo-sensitivity was demonstrated by studying the oil-water affinity of microgels with temperature after Congo red labeling. Finally, droplet-based microfluidics was found to be a good and promising tool for generating responsive biobased hydrogels for drug delivery applications and potential new colloidal stabilizers for dispersed systems such as Pickering emulsions.
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Affiliation(s)
- C Karakasyan
- Université de Rouen Laboratoire Polymères, Biopolymères, Surfaces, CNRS UMR 6270, INC3M FR3038, Bd de Broglie, F-76821 Mont Saint Aignan, France
| | - J Mathos
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes Cedex, France
| | - S Lack
- Laboratoires Brothier, Centre de Recherche & Développement, Z.A. des Roches, B.P. 26, F-49590 Fontevraud L'abbaye, France
| | - J Davy
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes Cedex, France
| | - M Marquis
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes Cedex, France
| | - D Renard
- INRA, UR1268 Biopolymères Interactions Assemblages, F-44300 Nantes Cedex, France.
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26
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Ali G, Dulong V, Gasmi SN, Rihouey C, Picton L, Le Cerf D. Covalent immobilization of pullulanase on alginate and study of its hydrolysis of pullulan. Biotechnol Prog 2015; 31:883-9. [DOI: 10.1002/btpr.2093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 04/21/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Ghina Ali
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Virginie Dulong
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Sarah N. Gasmi
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Christophe Rihouey
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Luc Picton
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
| | - Didier Le Cerf
- Normandie Université; France
- Laboratoire Polymères Biopolymères Surfaces; Université De Rouen; Mont Saint Aignan F 76821 France
- CNRS UMR 6270 & Fr3038; Mont Saint Aignan F 76821 France
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27
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Gupta NR, Torris A. T A, Wadgaonkar PP, Rajamohanan P, Ducouret G, Hourdet D, Creton C, Badiger MV. Synthesis and characterization of PEPO grafted carboxymethyl guar and carboxymethyl tamarind as new thermo-associating polymers. Carbohydr Polym 2015; 117:331-338. [DOI: 10.1016/j.carbpol.2014.09.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Revised: 09/16/2014] [Accepted: 09/24/2014] [Indexed: 10/24/2022]
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28
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Le Cerf D, Pepin AS, Niang PM, Cristea M, Karakasyan-Dia C, Picton L. Formation of polyelectrolyte complexes with diethylaminoethyl dextran: Charge ratio and molar mass effect. Carbohydr Polym 2014; 113:217-24. [DOI: 10.1016/j.carbpol.2014.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 07/02/2014] [Accepted: 07/03/2014] [Indexed: 10/25/2022]
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29
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Wang J, Cui S, Bao Y, Xing J, Hao W. Tocopheryl pullulan-based self assembling nanomicelles for anti-cancer drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 43:614-21. [DOI: 10.1016/j.msec.2014.07.066] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 06/25/2014] [Accepted: 07/27/2014] [Indexed: 01/01/2023]
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30
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Mocanu G, Nichifor M, Picton L, About-Jaudet E, Le Cerf D. Preparation and characterization of anionic pullulan thermoassociative nanoparticles for drug delivery. Carbohydr Polym 2014; 111:892-900. [DOI: 10.1016/j.carbpol.2014.05.037] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 05/13/2014] [Accepted: 05/14/2014] [Indexed: 02/07/2023]
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31
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Roy A, Comesse S, Grisel M, Hucher N, Souguir Z, Renou F. Hydrophobically Modified Xanthan: An Amphiphilic but Not Associative Polymer. Biomacromolecules 2014; 15:1160-70. [DOI: 10.1021/bm4017034] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Audrey Roy
- University of
Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
| | - Sébastien Comesse
- University of
Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
| | - Michel Grisel
- University of
Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
| | - Nicolas Hucher
- University of
Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
| | - Zied Souguir
- Laboratoire
Polymeres Biopolymeres Surfaces, University of Rouen, F-76821 Mont St. Aignan, France
| | - Frédéric Renou
- University of
Le Havre, URCOM, EA 3221, FR CNRS 3038, 25 rue Philippe Lebon, B.P. 540, 76058 Le Havre Cedex, France
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32
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Wilfert S, Iturmendi A, Henke H, Brüggemann O, Teasdale I. Thermoresponsive Polyphosphazene-Based Molecular Brushes by Living Cationic Polymerization. MACROMOLECULAR SYMPOSIA 2014; 337:116-123. [PMID: 24926189 PMCID: PMC4050288 DOI: 10.1002/masy.201450314] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of polyphosphazenes with molecular brush type structures have been prepared with controlled molecular weights and narrow polydispersities. The polymers show lower critical solution temperatures (LCST) between 18 and 90 °C, which can be easily tailored by choice of side-substituent to suit the required application. A temperature triggered self-assembly is observed to give stable colloidal aggregates with dimensions in the region of 100-300 nm.
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Affiliation(s)
- Sandra Wilfert
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Aitziber Iturmendi
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Helena Henke
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Oliver Brüggemann
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
| | - Ian Teasdale
- Institute of Polymer Chemistry, Johannes Kepler University Linz, Welser Strasse 42, 4060 Leonding, Austria
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Hebeish A, El-Rafie MH, Rabie AM, El-Sheikh MA, El-Naggar ME. Ultra-microstructural features of perborate oxidized starch. J Appl Polym Sci 2013. [DOI: 10.1002/app.40170] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- A. Hebeish
- Textile Research Division; National Research Centre; Dokki Cairo Egypt
| | - M. H. El-Rafie
- Textile Research Division; National Research Centre; Dokki Cairo Egypt
| | - A. M. Rabie
- Department of Chemistry, Faculty of Science; Ain Shams University; Cairo Egypt
| | - M. A. El-Sheikh
- Textile Research Division; National Research Centre; Dokki Cairo Egypt
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34
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Association states of multisensitive smart polysaccharide–block-polyetheramine copolymers. Carbohydr Polym 2013; 95:41-9. [DOI: 10.1016/j.carbpol.2013.02.032] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2012] [Revised: 01/30/2013] [Accepted: 02/15/2013] [Indexed: 11/23/2022]
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35
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Belbekhouche S, Desbrières J, Dulong V, Picton L, Le Cerf D, Alexandre S. Organization of “Pullulan”-block-polyether copolymers at the aqueous solution/air interface. J Colloid Interface Sci 2013; 398:134-41. [DOI: 10.1016/j.jcis.2013.02.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/01/2013] [Accepted: 02/02/2013] [Indexed: 11/26/2022]
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36
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D’Este M, Alini M, Eglin D. Single step synthesis and characterization of thermoresponsive hyaluronan hydrogels. Carbohydr Polym 2012; 90:1378-85. [DOI: 10.1016/j.carbpol.2012.07.007] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 06/21/2012] [Accepted: 07/02/2012] [Indexed: 01/31/2023]
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37
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Mocanu G, Souguir Z, Picton L, Le Cerf D. Multi-responsive carboxymethyl polysaccharide crosslinked hydrogels containing Jeffamine side-chains. Carbohydr Polym 2012; 89:578-85. [DOI: 10.1016/j.carbpol.2012.03.052] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 03/14/2012] [Accepted: 03/18/2012] [Indexed: 11/25/2022]
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