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Andersson Trojer M, Andersson M, Bergenholtz J, Gatenholm P. Elastic strain-hardening and shear-thickening exhibited by thermoreversible physical hydrogels based on poly(alkylene oxide)-grafted hyaluronic acid or carboxymethylcellulose. Phys Chem Chem Phys 2020; 22:14579-14590. [PMID: 32597442 DOI: 10.1039/d0cp02124e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The formation of strongly elastic physical gels based on poly(alkylene oxide)-grafted hyaluronan or carboxymethylcellulose, exhibiting both shear-thickening and strain-hardening have been studied using rheometry and explained using a slightly different interpretation of the transient network theory. The graft copolymers were prepared by a quantitative coupling reaction. Their aqueous solutions displayed a thermoreversible continuous transition from Newtonian fluid to viscoelastic solid which could be controlled by the reaction conditions. The evolution of all material properties of the gel could be categorized into two distinct temperature regimes with a fast evolution at low temperatures followed by a slow evolution at high temperatures. The activation energy of the zero shear viscosity and the relaxation time of the graft inside the interconnecting microdomains were almost identical to each other in both temperature regimes. This suggests that the number of microdomains remained approximately constant whereas the aggregation number inside the microdomains increased according to the binodal curve of the thermosensitive graft.
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Affiliation(s)
- Markus Andersson Trojer
- Department of Colloid Chemistry, Interactions in Complex Monolayers, Max Planck Institute of Colloids and Interfaces, DE-14476 Potsdam, Germany and Department of Chemistry, Biomaterials and Textiles, Fibre Development, RISE IVF, Mölndal, Sweden.
| | - Mats Andersson
- Department of Chemistry and Chemical Engineering, Polymer Technology, Chalmers University of Technology, SE-41296 Göteborg, Sweden and Institute for NanoScale Science & Technology, Flinders University, Bedford Park, Adelaide, South Australia 5042, Australia
| | - Johan Bergenholtz
- Department of Chemistry and Molecular Biology, University of Gothenburg, SE-412 96 Göteborg, Sweden
| | - Paul Gatenholm
- Department of Chemistry and Chemical Engineering, Biopolymer Technology, Wallenberg Wood Science Center, Chalmers University of Technology, SE-41296 Göteborg, Sweden
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2
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Ghorai SK, Maji S, Subramanian B, Maiti TK, Chattopadhyay S. Promoted Osteoconduction of Polyurethane-Urea Based 3D Nanohybrid Scaffold through Nanohydroxyapatite Adorned Hierarchical Titanium Phosphate. ACS APPLIED BIO MATERIALS 2019; 2:3907-3925. [PMID: 35021325 DOI: 10.1021/acsabm.9b00487] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The lack of optimal physiological properties, bacterial colonization, and auto-osteoinduction, are the foremost issues of orthopedic implantations. In terms of bone healing, many researchers have reported the release of additional growth factors of the implanted biomaterials to accelerate the bone regeneration process. However, the additional growth factor may cause side effects such as contagion, nerve pain, and the formation of ectopic bone. Thus, the design of an osteoconductive scaffold having excellent biocompatibility, appropriate physicomechanical properties, and promoted auto osteoinductivity with antibacterial activity is greatly desired. In this study, 2D rodlike nanohydroxyapatite (nHA) adorned titanium phosphate (TP) with a flowerlike morphology was synthesized by a hydrothermal precipitation reaction. The nanohybrid material (nHA-TP) was incorporated into the synthesized polycaprolactone diol and spermine based thermoplastic polyurethane-urea (PUU) via in situ technique followed by salt leaching to fabricate the macroporous 3D polymer nanohybrid scaffold (PUU/nHA-TP). Structure explication of PUU was performed by NMR spectroscopy. The synthesized nanohybrid scaffold with 1% nHA-TP showed 67% increase of tensile strength and 18% improved modulus compared to the pristine PUU via formation of H-bonding or dative bonds between the metal and the amide linkage of the polyurethane or polyurea. In vitro study showing improved cell viability and proliferation of the seeded cell revealed the superior osteoconductivity of the nanohybrid scaffold. Most importantly, the in vivo experiments revealed a significant amount of bone regeneration in the nanohybrid scaffold implanted tibial site compared to the pristine scaffold without any toxic effect. Introduction of the minute amount of titanium phosphate within the adorned nHA promotes the osteoconductivity significantly by the capability of forming coordinate bonds of the titanium ion. Depending on the mechanical, physicochemical, in vitro characteristics, and in vivo osteoconductivity, the PUU/nHA-TP nanohybrid scaffold has great potential as an alternative biomaterial in bone tissue regeneration application.
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Affiliation(s)
- Sanjoy Kumar Ghorai
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur-721302, India
| | - Somnath Maji
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, India
| | | | - Tapas Kumar Maiti
- Department of Biotechnology, Indian Institute of Technology, Kharagpur-721302, India
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3
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Cellulose phosphorylation comparison and analysis of phosphorate position on cellulose fibers. Carbohydr Polym 2019; 229:115294. [PMID: 31826473 DOI: 10.1016/j.carbpol.2019.115294] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/19/2019] [Accepted: 09/03/2019] [Indexed: 11/22/2022]
Abstract
Chemical modifications of cellulose fibers as pretreatment for cellulose nanofibrils (CNF) production have been investigated to improve the production process and the quality of obtained cellulosic nanomaterial. In this study, phosphorylation of cellulose fibers was done in anticipation of a future nanofibrillation. Different phosphate salts, namely NH4H2PO4, (NH4)2HPO4, Na2HPO4, NaH2PO4 and LiH2PO4 with different constants of solubility (Ks) were used to increase the efficiency of the modification. Phosphorylated cellulose pulps were analyzed using elemental analysis, solid-state 13C and 31P NMR, or conductimetric titration method. No effect of Ks was observed whereas a counterion effect was pointed out. The study also reported the effect of pH, cellulose consistency, temperature and urea content in phosphorylation efficiency. Finally, chemical functionalization and penetration of phosphorylation reagents in the cellulose fibers were evaluated using XPS, SEM-EDX, ToF-SIMS and solid-state NMR.
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4
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Andersson Trojer M, Andersson M, Bergenholtz J, Gatenholm P. Quantitative Grafting for Structure-Function Establishment: Thermoresponsive Poly(alkylene oxide) Graft Copolymers Based on Hyaluronic Acid and Carboxymethylcellulose. Biomacromolecules 2019; 20:1271-1280. [PMID: 30681838 DOI: 10.1021/acs.biomac.8b01692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A series of thermoresponsive graft copolymers, gelling at physiological conditions in aqueous solution and cell growth media, have been synthesized using quantitative coupling between a small set of amino-functionalized poly(alkylene oxide) copolymers (PAO) and the carboxylate of the biologically important polysaccharides (PSa) carboxymethylcellulose and the less reactive hyaluronate. Quantitative grafting enables the establishment of structure-function relationship which is imperative for controlling the properties of in situ gelling hydrogels. The EDC/NHS-mediated reaction was monitored using SEC-MALLS, which revealed that all PAOs were grafted onto the PSa backbone. Aqueous solutions of the graft copolymers were Newtonian fluids at room temperatures and formed reversible physical gels at elevated temperatures which were noncytotoxic toward chondrocytes. The established structure-function relationship was most clearly demonstrated by inspecting the thermogelling strength and the onset of thermogelling in a phase diagram. The onset of the thermogelling function could be controlled by the global PAO concentration, independent of graft ratio.
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Affiliation(s)
- Markus Andersson Trojer
- Department of Colloid Chemistry, Interactions in Complex Monolayers , Max Planck Institute of Colloids and Interfaces , DE-14476 Potsdam , Germany.,Department of Materials , Bio-based fibres, RISE IVF , SE-43153 Mölndal , Sweden
| | - Mats Andersson
- Department of Chemistry and Chemical Engineering, Polymer Technology , Chalmers University of Technology , SE-41296 Göteborg , Sweden.,Centre for NanoScale Science and Technology , Flinders University , Bedford Park , Adelaide , South Australia 5042 , Australia
| | - Johan Bergenholtz
- Department of Chemistry and Molecular Biology , University of Gothenburg , SE-412 96 Göteborg , Sweden
| | - Paul Gatenholm
- Department of Chemistry and Chemical Engineering, Biopolymer Technology , Chalmers University of Technology , SE-41296 Göteborg , Sweden
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5
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Li L, Ma W, Higaki Y, Kamitani K, Takahara A. Organic-Inorganic Hybrid Thin Films Fabricated by Layer-by-Layer Assembly of the Phosphorylated Cellulose Nanocrystal and Imogolite Nanotubes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13361-13367. [PMID: 30350706 DOI: 10.1021/acs.langmuir.8b03107] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Phosphorylated cellulose nanocrystal (P-CNC)/imogolite nanotube (natural aluminosilicate nanotube) hybrid thin films were fabricated by spin-assisted layer-by-layer assembly. Phosphorylation of CNC with diammonium hydrogen phosphate ((NH4)2HPO4) was carried out to introduce phosphate groups on the CNC surface for enhanced interaction with imogolite. Structure of the P-CNC/imogolite thin film was characterized by atomic force microscopy, scanning electron microscopy, X-ray diffraction (XRD), and grazing incidence wide-angle XRD. The film thickness increased linearly with the increment of the P-CNC/imogolite bilayer. Benefitting from the strong affinity between the phosphate group of the P-CNC and the Al-OH group of imogolite, the P-CNC/imogolite thin films were quite stable in water within a wide range of pH values, compared with the deterioration of the CNC/imogolite film under same soaking conditions.
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Ghanadpour M, Carosio F, Larsson PT, Wågberg L. Phosphorylated Cellulose Nanofibrils: A Renewable Nanomaterial for the Preparation of Intrinsically Flame-Retardant Materials. Biomacromolecules 2015; 16:3399-410. [DOI: 10.1021/acs.biomac.5b01117] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Federico Carosio
- Dipartimento
di Scienza Applicata e Technologia, Politecnico di Torino, Sede di Alessandria, Viale Teresa Michel 5, 15121 Alessandria, Italy
| | - Per Tomas Larsson
- Innventia AB, Drottning Kristinas
Väg 61, SE-114 86 Stockholm, Sweden
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Illy N, Fache M, Ménard R, Negrell C, Caillol S, David G. Phosphorylation of bio-based compounds: the state of the art. Polym Chem 2015. [DOI: 10.1039/c5py00812c] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this review is to present both fundamental and applied research on the phosphorylation of renewable resources, through reactions on naturally occurring functions, and their use in biobased polymer chemistry and applications.
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Affiliation(s)
- Nicolas Illy
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 8232
- IPCM
- Paris
| | - Maxence Fache
- Institut Charles Gerhardt Montpellier UMR 5353 – Equipe Ingénierie et Architectures Macromoléculaires
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier, CEDEX 5
- France
| | - Raphaël Ménard
- Institut Charles Gerhardt Montpellier UMR 5353 – Equipe Ingénierie et Architectures Macromoléculaires
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier, CEDEX 5
- France
| | - Claire Negrell
- Institut Charles Gerhardt Montpellier UMR 5353 – Equipe Ingénierie et Architectures Macromoléculaires
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier, CEDEX 5
- France
| | - Sylvain Caillol
- Institut Charles Gerhardt Montpellier UMR 5353 – Equipe Ingénierie et Architectures Macromoléculaires
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier, CEDEX 5
- France
| | - Ghislain David
- Institut Charles Gerhardt Montpellier UMR 5353 – Equipe Ingénierie et Architectures Macromoléculaires
- Ecole Nationale Supérieure de Chimie de Montpellier
- 34296 Montpellier, CEDEX 5
- France
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Wang Y, Duo F, Peng S, Jia F, Fan C. Potassium iodate assisted synthesis of titanium dioxide nanoparticles with superior water-dispersibility. J Colloid Interface Sci 2014; 430:31-9. [PMID: 24998051 DOI: 10.1016/j.jcis.2014.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 04/08/2014] [Accepted: 05/05/2014] [Indexed: 11/28/2022]
Abstract
In this paper, we report a novel polyol process to synthesize highly water-dispersible anatase titanium dioxide (TiO2) nanoparticles (∼5 nm) by the introduction of inorganic oxidizing agent--KIO3. The obtained TiO2 nanoparticles are well dispersible in water at pH≥5.0 and the resulting aqueous dispersion remains stable over months. The superior water-dispersibility of as-formed TiO2 is ascribed to the electrostatic repulsion from carboxylic acid group modified on TiO2 nanoparticles, which is the oxidation product of solvent diethylene glycol (DEG) by KIO3. Based on the characterization results, the formation processes of water-dispersibility TiO2 nanoparticles are proposed. Meanwhile, the synthesized TiO2 nanoparticles are found to be doped by iodine and exhibit excellent photocatalytic activity on degradation of rhodamine-B (RhB) under visible-light irradiation. The further tests demonstrate that the O(2-) is the main active species during photodegradation of RhB.
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Affiliation(s)
- Yawen Wang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
| | - Fangfang Duo
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
| | - Shiqi Peng
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
| | - Falong Jia
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
| | - Caimei Fan
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, People's Republic of China
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9
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Wintgens V, Dalmas F, Sébille B, Amiel C. Novel phosphorus-containing cyclodextrin polymers and their affinity for calcium cations and hydroxyapatite. Carbohydr Polym 2013; 98:896-904. [DOI: 10.1016/j.carbpol.2013.06.073] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 06/27/2013] [Accepted: 06/28/2013] [Indexed: 12/20/2022]
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10
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Gundogdu E, Koksal C, Karasulu E. Comparison of cefpodoxime proxetil release and antimicrobial activity from tablet formulations: complexation with hydroxypropyl-β-cyclodextrin in the presence of water soluble polymer. Drug Dev Ind Pharm 2012; 38:689-96. [PMID: 22010782 DOI: 10.3109/03639045.2011.621434] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study aims to prove the complexation of cefpodoxime proxetil (CP) by hydroxypropyl-β-cyclodextrin (HP-β-CD) in the presence of sodium carboxymethyl cellulose (Na CMC), and makes a comparison of commercial tablets by dissolution and antimicrobial activity studies. The CP--HP-β-CD complex was prepared by kneading method and characterized by SEM, FTIR and DSC. The solubility method was used to investigate the effect of HP-β-CD and Na CMC on the solubility of CP. The complex tablets were prepared using direct compression method. Dissolution studies were performed with complex tablets and commercial tablets in pH 1.2, 4.5, 6.8 and 7.4 buffer solutions. It was observed that complexation occurred in all formulations, and HP-β-CD is able to increase CP solubility and dissolution rate of CP was improved from complex tablets, when compared with commercial tablets. Furthermore, the antimicrobial activity studies revealed that the CP--HP-β-CD complex and complex tablets were shown to have more effective antimicrobial activity than commercial tablets. It is evident from the results that complexation with HP-β-CD in the presence of Na CMC is feasible way to prepare a more efficient tablet formulation with improved dissolution and antimicrobial activity.
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Affiliation(s)
- Evren Gundogdu
- Ege University, Faculty of Pharmacy, Department of Biopharmaceutics and Pharmacokinetics, Izmir, Turkey
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11
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Travan A, Marsich E, Donati I, Foulc MP, Moritz N, Aro HT, Paoletti S. Polysaccharide-Coated Thermosets for Orthopedic Applications: From Material Characterization to In Vivo Tests. Biomacromolecules 2012; 13:1564-72. [DOI: 10.1021/bm3002683] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Andrea Travan
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Eleonora Marsich
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Ivan Donati
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
| | - Marie-Pierre Foulc
- Rescoll, Société
de Recherche, 8 Allée Geoffroy Saint-Hilaire,
33615 Pessac, France
| | - Niko Moritz
- Orthopaedic
Research Unit, Department of Orthopaedic Surgery and Traumatology, University of Turku, Kiinamyllynkatu
10, 20520, Turku,
Finland
| | - Hannu T. Aro
- Orthopaedic
Research Unit, Department of Orthopaedic Surgery and Traumatology, University of Turku, Kiinamyllynkatu
10, 20520, Turku,
Finland
| | - Sergio Paoletti
- Department of Life
Sciences, University of Trieste, Via Giorgieri 1, Trieste I-34127, Italy
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12
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Hozumi A, Kim B, McCarthy TJ. Vapor-phase formation of alkyl isocyanate-derived self-assembled monolayers on titanium dioxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:2875-80. [PMID: 19437701 DOI: 10.1021/la803564c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Titanium dioxide (TiO2) surfaces were modified at atmospheric pressure by exposure to the vapor of alkyl isocyanates having different alkyl chain lengths (CH3[CH2]nN=C=O, where n = 3, 4, 7, 11, 15, and 17). Dynamic water contact angle measurements, X-ray photoelectron spectroscopy, and atomic force microscopy confirmed that the vapor-phase treatment produced self-assembled monolayers (SAMs) of the isocyanate molecules on the TiO2 surface through a carbamate linkage without any marked changes in surface morphology. The thickness and hydrophobicity of the isocyanate-derived SAMs depend on both the alkyl chain length and process temperature. As a control, an oxidized silicon (SiO2/Si) surface was treated under the same conditions. Water contact angle hysteresis for the SAM-covered TiO2 surfaces is greater than that observed for SAM-covered SiO2/Si surfaces, suggesting that SAMs on TiO2 surfaces are disordered and/or insufficiently cover the surfaces. This leads to their water sensitivity. Desorption kinetics are also strongly affected by the alkyl chain length, and the SAMs of adsorbed molecules with n = 15 and 17 are relatively stable among these six isocyanate-derived SAMs.
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Affiliation(s)
- Atsushi Hozumi
- National Institute of Advanced Industrial Science & Technology (AIST), Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan.
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