1
|
Michna A, Pomorska A, Ozcan O. Biocompatible Macroion/Growth Factor Assemblies for Medical Applications. Biomolecules 2023; 13:biom13040609. [PMID: 37189357 DOI: 10.3390/biom13040609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/24/2023] [Accepted: 03/26/2023] [Indexed: 03/31/2023] Open
Abstract
Growth factors are a class of proteins that play a role in the proliferation (the increase in the number of cells resulting from cell division) and differentiation (when a cell undergoes changes in gene expression becoming a more specific type of cell) of cells. They can have both positive (accelerating the normal healing process) and negative effects (causing cancer) on disease progression and have potential applications in gene therapy and wound healing. However, their short half-life, low stability, and susceptibility to degradation by enzymes at body temperature make them easily degradable in vivo. To improve their effectiveness and stability, growth factors require carriers for delivery that protect them from heat, pH changes, and proteolysis. These carriers should also be able to deliver the growth factors to their intended destination. This review focuses on the current scientific literature concerning the physicochemical properties (such as biocompatibility, high affinity for binding growth factors, improved bioactivity and stability of the growth factors, protection from heat, pH changes or appropriate electric charge for growth factor attachment via electrostatic interactions) of macroions, growth factors, and macroion-growth factor assemblies, as well as their potential uses in medicine (e.g., diabetic wound healing, tissue regeneration, and cancer therapy). Specific attention is given to three types of growth factors: vascular endothelial growth factors, human fibroblast growth factors, and neurotrophins, as well as selected biocompatible synthetic macroions (obtained through standard polymerization techniques) and polysaccharides (natural macroions composed of repeating monomeric units of monosaccharides). Understanding the mechanisms by which growth factors bind to potential carriers could lead to more effective delivery methods for these proteins, which are of significant interest in the diagnosis and treatment of neurodegenerative and civilization diseases, as well as in the healing of chronic wounds.
Collapse
|
2
|
A novel cationic-modified chitosan flocculant efficiently treats alkali‒surfactant‒polymer flooding-produced water. Polym Bull (Berl) 2023. [DOI: 10.1007/s00289-023-04682-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
|
3
|
|
4
|
Lairenjam PD, Sukumaran SK, Satapathy DK. Modulation of Optical Anisotropy in Chitosan Thin Films: Role of Swelling. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pradipkanti Devi Lairenjam
- Soft Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
- Molecular Electronics Laboratory, Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bengaluru 560064, India
| | - Sathish K. Sukumaran
- Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa 992-8510, Japan
| | - Dillip K. Satapathy
- Soft Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai 600036, India
| |
Collapse
|
5
|
Bhatt H, Bahadur J, Checker R, Ajgaonkar P, Vishwakarma SR, Sen D. Influence of molecular interactions on structure, controlled release and cytotoxicity of curcumin encapsulated chitosan - Silica nanostructured microspheres. Colloids Surf B Biointerfaces 2021; 208:112067. [PMID: 34500202 DOI: 10.1016/j.colsurfb.2021.112067] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/20/2021] [Accepted: 08/22/2021] [Indexed: 01/09/2023]
Abstract
Curcumin possesses numerous medicinal benefits including anti-cancer and anti-viral properties. However, its wide scale use as a drug is often hindered owing to the dearth of suitable drug-delivery systems which can solubilise it for long-term sustained-release and safeguard its beneficial properties. In this work, a fast, one-step method, employing evaporation induced assembly of colloids, has been employed for the synthesis of curcumin encapsulated organic-inorganic hybrid micron-sized spheres. Detailed physical properties of the microspheres, with scaffolds of silica nanoparticles (∼8.5 nm) cross linked by chitosan, are studied to trace the underlying mechanism of structural assembly in such systems, by tuning the polymer matrix with solubilizing agents, DMSO and Tween 20. A systematic modification in the hydrogen bonding network, conformations and interactions between macromolecules is revealed upon tuning the organic matrix. This in turn is found to control the assembly vis-à-vis the granular morphology, drug entrapment and packing fraction of nanoparticles in the microspheres, which have direct influence on the biological properties. Consequently, the microspheres are found to follow a first order drug release kinetics with a tunable rate constant which follows the ordering of packing fraction of silica nanoparticles in the micro-granules. A sustained curcumin release for a period extending up to 24 h has been achieved. Further studies using human lung and cervical cancer cell lines assert good anti-cancer properties of these nanostructured microspheres in cancer cells, while showing no toxicity towards normal cells. Thus, such hybrid organic-inorganic formulations achieved using multi-component colloidal assembly approach, with enhanced stability against degradation, are promising candidates for future clinical applications of water-insoluble drugs.
Collapse
Affiliation(s)
- Himal Bhatt
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India.
| | - J Bahadur
- Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - R Checker
- Radiation Biology & Health Safety Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| | - P Ajgaonkar
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - S R Vishwakarma
- High Pressure & Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India
| | - Debasis Sen
- Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, 400085, India; Homi Bhabha National Institute, Anushaktinagar, Mumbai, 400094, India
| |
Collapse
|
6
|
Fabrication and antibacterial evaluation of peppermint oil-loaded composite microcapsules by chitosan-decorated silica nanoparticles stabilized Pickering emulsion templating. Int J Biol Macromol 2021; 183:2314-2325. [PMID: 34087300 DOI: 10.1016/j.ijbiomac.2021.05.198] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2021] [Revised: 05/19/2021] [Accepted: 05/29/2021] [Indexed: 12/23/2022]
Abstract
Novel peppermint oil (PO)-loaded composite microcapsules (CM) with hydroxypropyl methyl cellulose (HPMC)/chitosan/silica shells were effectively fabricated by PO Pickering emulsion, which were stabilized with chitosan-decorated silica nanoparticles (CSN). The surface modification of chitosan could improve the hydrophobicity of silica nanoparticles and favor their adsorption at the oil-water interface of PO Pickering emulsions. The microcapsule composite shells were formed dependent on the electrostatic adsorption of HPMC and CSN, and further subjected to spray-drying. The peppermint oil-loaded composite microcapsules with 100% HPMC as wall material (PO-CM@100%HPMC) seemed to be optimum formulation based on the prolonged release, acceptable entrapment efficiency (89.1%) and drug loading (25.5%). The PO-CM@100%HPMC could remarkably prolong the stability of PO. Moreover, the PO-CM@100%HPMC had a long-term antimicrobial activity (85.4%) against S. aureus and E. coli even after storage for 60 days. Therefore, the Pickering emulsions based microcapsules seemed to be a promising strategy for antibacterial application for PO.
Collapse
|
7
|
Farinelli G, Di Luca A, Kaila VRI, MacLachlan MJ, Tiraferri A. Fe-chitosan complexes for oxidative degradation of emerging contaminants in water: Structure, activity, and reaction mechanism. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124662. [PMID: 33257118 DOI: 10.1016/j.jhazmat.2020.124662] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 10/28/2020] [Accepted: 11/22/2020] [Indexed: 06/12/2023]
Abstract
Versatile and ecofriendly methods to perform oxidations at near-neutral pH are of crucial importance for processes aimed at purifying water. Chitosan, a deacetylated form of chitin, is a promising starting material owing to its biocompatibility and ability to form stable films and complexes with metals. Here, we report a novel chitosan-based organometallic complex that was tested both as homogeneous and heterogeneous catalyst in the degradation of contaminants of emerging concern in water. The stoichiometry of the complex was experimentally verified with different metals, namely, Cu(II), Fe(III), Fe(II), Co(II), Pd(II), and Mn(II), and we identified the chitosan-Fe(III) complex as the most efficient catalyst. This complex effectively degraded phenol, triclosan, and 3-chlorophenol in the presence of hydrogen peroxide. A putative ferryl-mediated reaction mechanism is proposed based on experimental data, density functional theory calculations, and kinetic modeling. Finally, a film of the chitosan-Fe(III) complex was synthesized and proven a promising supported heterogeneous catalyst for water purification.
Collapse
Affiliation(s)
- Giulio Farinelli
- Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy
| | - Andrea Di Luca
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16C, 10691 Stockholm, Sweden
| | - Ville R I Kaila
- Department of Biochemistry and Biophysics, Stockholm University, Svante Arrhenius väg 16C, 10691 Stockholm, Sweden
| | - Mark J MacLachlan
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, V6T 1Z1, Canada.
| | - Alberto Tiraferri
- Department of Environment, Land and Infrastructure Engineering (DIATI), Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin, Italy.
| |
Collapse
|
8
|
Yu H, Zhu Y, Mu B, Hui A, Wang A. Removal of a cationic dye from aqueous solution by a porous adsorbent templated from eco-friendly Pickering MIPEs using chitosan-modified semi-coke particles. NEW J CHEM 2021. [DOI: 10.1039/d0nj05964a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous materials prepared from high internal phase emulsions have been attracting much attention in recent years, but two major defects related to the high consumption of organic solvent and surfactants are always difficult to solve.
Collapse
Affiliation(s)
- Hui Yu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province
- Center of Eco-material and Green Chemistry
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
| | - Yongfeng Zhu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province
- Center of Eco-material and Green Chemistry
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
| | - Bin Mu
- Key Laboratory of Clay Mineral Applied Research of Gansu Province
- Center of Eco-material and Green Chemistry
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
| | - Aiping Hui
- Key Laboratory of Clay Mineral Applied Research of Gansu Province
- Center of Eco-material and Green Chemistry
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
| | - Aiqin Wang
- Key Laboratory of Clay Mineral Applied Research of Gansu Province
- Center of Eco-material and Green Chemistry
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
| |
Collapse
|
9
|
Sukul M, Sahariah P, Lauzon HL, Borges J, Másson M, Mano JF, Haugen HJ, Reseland JE. In vitro biological response of human osteoblasts in 3D chitosan sponges with controlled degree of deacetylation and molecular weight. Carbohydr Polym 2020; 254:117434. [PMID: 33357907 DOI: 10.1016/j.carbpol.2020.117434] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 10/03/2020] [Accepted: 11/19/2020] [Indexed: 12/22/2022]
Abstract
We have studied the effect of chitosan sponges, produced from chitosan batches with distinct degree of deacetylation (DDA) and molecular weight (Mw), on the adhesion, growth and differentiation of primary human osteoblasts with an aim to offer a suitable tool for guided bone regeneration. All the chitosan sponges revealed similar microstructure, irrespective of the DDA (58, 73, 82, 88, and 91 %) and Mw (749, 547, 263, 215, and 170 kDa, respectively). Cell spreading was higher on sponges having a higher DDA. Higher DDA induced a more pronounced increase in alkaline phosphatase activity, osteopontin (OPN), vascular endothelial growth factor-A (VEGF), interleukin-6 (IL-6), and reduction in monocyte chemoattractant protein-1 (MCP-1), sclerostin (SOST) and dickkopf related protein-1 as compared to lower DDA. Lower DDA induced the increased secretion of osteoprotegerin and SOST as compared to higher DDA. The combination of higher DDA and Mw induced an increased secretion of VEGF and IL-6, however reduced the secretion of OPN as compared to chitosan with similar DDA but with lower Mw. In summary, the variations in cellular responses to the different chitosan sponges indicate a potential for individual tailoring of desired responses in guided bone regeneration.
Collapse
Affiliation(s)
- Mousumi Sukul
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway.
| | - Priyanka Sahariah
- Faculty of Pharmaceutical Sciences, School of Health Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland
| | | | - João Borges
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Már Másson
- Faculty of Pharmaceutical Sciences, School of Health Sciences, University of Iceland, Hofsvallagata 53, IS-107 Reykjavík, Iceland
| | - João F Mano
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Håvard J Haugen
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway
| | - Janne E Reseland
- Department of Biomaterials, Institute of Clinical Dentistry, University of Oslo, 0317 Oslo, Norway
| |
Collapse
|
10
|
Probing the Molecular Interactions of Chitosan Films in Acidic Solutions with Different Salt Ions. COATINGS 2020. [DOI: 10.3390/coatings10111052] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Understanding the interaction mechanisms of chitosan films plays a central role in a wide range of its applications, such as bioadhesive, drug delivery, wound healing, tissue engineering, and wastewater treatment for heavy metal ions. Here, we investigated the molecular interactions between chitosan films in acidic solutions with different salt ions using a surface forces apparatus (SFA). The results showed that chitosan can be adsorbed to mica surfaces by electrostatic interaction under acidic conditions. The force measurements demonstrated that the interactions depend on the salt types, concentrations, and contact time. With the addition of 1 mM LaCl3 and NaCl into the acetic acid (HAc) buffer solution, the cohesion between chitosan films enhanced by about 45% and 20%, respectively, after a contact time of 60 min. The enhanced cohesion induced by the combination of partly intermolecular complexation formation in a bridge model and conformation adjustment of chitosan under contact time in 1 mM LaCl3 solution. However, the cohesion reduced rapidly and even disappeared when the salt concentration increased to 10 mM and 100 mM. We proposed that the cross-linked structures of chitosan mainly contribute to the significant reduction of chitosan cohesion in LaCl3 solution. In comparison, the decrease in cohesion capacity in NaCl solution mainly results from the enhanced hydration effect. Our findings may provide insights into the interaction mechanisms of chitosan films under nanoconfinement in acidic conditions and suggestions for the development of chitosan-based materials.
Collapse
|
11
|
Matusiak J, Grządka E, Kowalczuk A, Pietruszka R, Godlewski M. The influence of hydrocarbon, fluorinated and silicone surfactants on the adsorption, stability and electrokinetic properties of the κ-carrageenan/alumina system. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
12
|
Kan Y, Yang Q, Tan Q, Wei Z, Chen Y. Diminishing Cohesion of Chitosan Films in Acidic Solution by Multivalent Metal Cations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:4964-4974. [PMID: 32308004 DOI: 10.1021/acs.langmuir.0c00438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chitosan is a natural polymer with good biocompatibility, biodegradability, and bioactivity that has great potential for biomedical and industrial applications. Like other natural sugar-based polymers, chitosan molecules own versatile adhesion abilities to bind with various surfaces, owing to multiple functional moieties contained in the chain. To develop the promising biomaterials based on the chitosan chemistry, it is fundamentally important to figure out its adhesion mechanism under a certain condition, which leaves us numbers of open questions. In this work, we characterized the chitosan films adsorbed on a mica substrate in acidic solution and investigated the effects of multivalent salts on the cohesive behaviors of the films by means of the surface forces apparatus. The results showed that the cohesion capacities of chitosan films were reduced to around 30% of their original states after the addition of 10-7 M LaCl3 into 150 mM acetic acid, which could be partially recovered by holding the films at the contact position for a longer time. Surprisingly, the cohesion loss in the films exhibited the dependence on the properties of the metal cations including valance and concentration. The topography of the chitosan-coated surface also showed obvious aggregation in the presence of submicromolar of the salts. Here, we attributed these phenomena regarding cohesion loss to the mechanisms involved in the absorption of metal cations by the chitosan chains, which not only consumed the binding sites but also induced conformation change in the polymer network. Our findings may offer a suggestion for the production of chitosan-based materials to notice the potential impacts of ultralow concentrated salts that are usually neglected even under acidic conditions.
Collapse
Affiliation(s)
- Yajing Kan
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Qiang Yang
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Qiyan Tan
- School of Mechanical Engineering, Nanjing Institute of Technology, Nanjing 211167, China
| | - Zhiyong Wei
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| | - Yunfei Chen
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, and School of Mechanical Engineering, Southeast University, Nanjing 211189, China
| |
Collapse
|
13
|
Ferrara V, Zito G, Arrabito G, Cataldo S, Scopelliti M, Giordano C, Vetri V, Pignataro B. Aqueous Processed Biopolymer Interfaces for Single-Cell Microarrays. ACS Biomater Sci Eng 2020; 6:3174-3186. [PMID: 33463257 PMCID: PMC7997111 DOI: 10.1021/acsbiomaterials.9b01871] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Single-cell microarrays are emerging tools to unravel intrinsic diversity within complex cell populations, opening up new approaches for the in-depth understanding of highly relevant diseases. However, most of the current methods for their fabrication are based on cumbersome patterning approaches, employing organic solvents and/or expensive materials. Here, we demonstrate an unprecedented green-chemistry strategy to produce single-cell capture biochips onto glass surfaces by all-aqueous inkjet printing. At first, a chitosan film is easily inkjet printed and immobilized onto hydroxyl-rich glass surfaces by electrostatic immobilization. In turn, poly(ethylene glycol) diglycidyl ether is grafted on the chitosan film to expose reactive epoxy groups and induce antifouling properties. Subsequently, microscale collagen spots are printed onto the above surface to define the attachment area for single adherent human cancer cells harvesting with high yield. The reported inkjet printing approach enables one to modulate the collagen area available for cell attachment in order to control the number of captured cells per spot, from single-cells up to double- and multiple-cell arrays. Proof-of-principle of the approach includes pharmacological treatment of single-cells by the model drug doxorubicin. The herein presented strategy for single-cell array fabrication can constitute a first step toward an innovative and environmentally friendly generation of aqueous-based inkjet-printed cellular devices.
Collapse
Affiliation(s)
- Vittorio Ferrara
- Dipartimento di Scienze Chimiche, Università di Catania, Viale A. Doria 6, 95125 Catania, Italy
| | - Giovanni Zito
- Dipartimento di Promozione della Salute, Materno-Infantile, Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), Sezione di Malattie Endocrine, del Ricambio e della Nutrizione, Università di Palermo, Piazza delle Cliniche 2, 90127 Palermo, Sicilia, Italy
| | - Giuseppe Arrabito
- Dipartimento di Fisica e Chimica-Emilio Segrè, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| | - Sebastiano Cataldo
- Dipartimento di Fisica e Chimica-Emilio Segrè, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| | - Michelangelo Scopelliti
- Dipartimento di Fisica e Chimica-Emilio Segrè, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| | - Carla Giordano
- Dipartimento di Promozione della Salute, Materno-Infantile, Medicina Interna e Specialistica di Eccellenza "G. D'Alessandro" (ProMISE), Sezione di Malattie Endocrine, del Ricambio e della Nutrizione, Università di Palermo, Piazza delle Cliniche 2, 90127 Palermo, Sicilia, Italy
| | - Valeria Vetri
- Dipartimento di Fisica e Chimica-Emilio Segrè, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| | - Bruno Pignataro
- Dipartimento di Fisica e Chimica-Emilio Segrè, Università di Palermo, Viale delle Scienze, 90128 Palermo, Italy
| |
Collapse
|
14
|
El Nahrawy AM, Mansour AM, Abou Hammad AB, Ibrahim RS, Abouelnaga AM, Abdel-Aziz MS. Optical, Functional Impact and Antimicrobial of Chitosan/Phosphosilicate/Al2O3 Nanosheets. J Inorg Organomet Polym Mater 2020. [DOI: 10.1007/s10904-020-01469-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
15
|
Core-in-cup/liquisol dual tackling effect on azelnidipine buccoadhesive tablet micromeritics, in vitro release, and mucoadhesive strength. ACTA PHARMACEUTICA (ZAGREB, CROATIA) 2019; 69:381-398. [PMID: 31259736 DOI: 10.2478/acph-2019-0022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/30/2018] [Indexed: 01/19/2023]
Abstract
Reduced bioavailability of azelnidipine is related to its poor aqueous solubility and extensive first-pass metabolism, which hinder its efficacy. These problems were addressed by implementing (1) a liquisol technique for promoting the dissolution rate in a controlled-release manner and (2) a core-in-cup bucco-adhesive drug delivery system as an alternative to the oral route. A 33 factorial design was used to study the effects of polymer type (sodium carboxymethyl cellulose (CMC Na), chitosan, or Carbomer P940) concentration (5, 10 or 15 %) and preparation technique (simple mix, liquisol or wet granulation) on the dissolution and mucoadhesion of core-in-cup azelnidipine buccoadhesive tablets. Tablet micromeritics, swelling index, mucoadhesive strength and in vitro release were characterized. Statistical analyses of these factors show ed significant effects on the studied responses, where F#16 prepared by the liquisol technique and containing 15 % CMC Na was chosen with an overall desirability of 0.953.
Collapse
|
16
|
Sergeeva IP, Sobolev VD, Sabbatovskii KG. The Effect of Salt Cation Charge on Cationic Polyelectrolyte Adsorption by a Negatively Charged Surface. COLLOID JOURNAL 2019. [DOI: 10.1134/s1061933x18060145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
17
|
Matusiak J, Grządka E, Bastrzyk A. Stability, adsorption and electrokinetic properties of the chitosan/silica system. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.06.056] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
18
|
Alison L, Demirörs AF, Tervoort E, Teleki A, Vermant J, Studart AR. Emulsions Stabilized by Chitosan-Modified Silica Nanoparticles: pH Control of Structure-Property Relations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:6147-6160. [PMID: 29719151 DOI: 10.1021/acs.langmuir.8b00622] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
In food-grade emulsions, particles with an appropriate surface modification can be used to replace surfactants and potentially enhance the stability of emulsions. During the life cycle of products based on such emulsions, they can be exposed to a broad range of pH conditions and hence it is crucial to understand how pH changes affect stability of emulsions stabilized by particles. Here, we report on a comprehensive study of the stability, microstructure, and macroscopic behavior of pH-controlled oil-in-water emulsions containing silica nanoparticles modified with chitosan, a food-grade polycation. We found that the modified colloidal particles used as stabilizers behave differently depending on the pH, resulting in unique emulsion structures at multiple length scales. Our findings are rationalized in terms of the different emulsion stabilization mechanisms involved, which are determined by the pH-dependent charges and interactions between the colloidal building blocks of the system. At pH 4, the silica particles are partially hydrophobized through chitosan modification, favoring their adsorption at the oil-water interface and the formation of Pickering emulsions. At pH 5.5, the particles become attractive and the emulsion is stabilized by a network of agglomerated particles formed between the droplets. Finally, chitosan aggregates form at pH 9 and these act as the emulsion stabilizers under alkaline conditions. These insights have important implications for the processing and use of particle-stabilized emulsions. On one hand, changes in pH can lead to undesired macroscopic phase separation or coalescence of oil droplets. On the other hand, the pH effect on emulsion behavior can be harnessed in industrial processing, either to tune their flow response by altering the pH between processing stages or to produce pH-responsive emulsions that enhance the functionality of the emulsified end products.
Collapse
Affiliation(s)
| | | | | | - Alexandra Teleki
- Nutritional R&D Center Formulation and Application , DSM Nutritional Products Ltd. , P.O. Box 2676, 4002 Basel , Switzerland
| | | | | |
Collapse
|
19
|
Ondaral S, Çelik E, Kurtuluş OÇ, Aşıkuzun E, Yakın İ. Chitosan adsorption on nanofibrillated cellulose with different aldehyde content and interaction with phosphate buffered saline. Carbohydr Polym 2018; 186:192-199. [DOI: 10.1016/j.carbpol.2017.12.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 11/22/2017] [Accepted: 12/12/2017] [Indexed: 11/29/2022]
|
20
|
Ding B, Wang J, Tao S, Ding Y, Zhang L, Gao N, Li G, Shi H, Li W, Ge S. Fabrication of multi-functional porous microspheres in a modular fashion for the detection, adsorption, and removal of pollutants in wastewater. J Colloid Interface Sci 2018; 522:1-9. [PMID: 29573635 DOI: 10.1016/j.jcis.2018.03.060] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 03/16/2018] [Accepted: 03/17/2018] [Indexed: 01/06/2023]
Abstract
Water pollution control has become significant challenges in recent years because of their extensive species diversity. It is critical to developing general-purpose materials for environmental rehabilitation. In this paper, a novel module-assembly method is developed to prepare multi-functional materials for treating pollutants in water. Building blocks are porous nanoparticles with a different function. Microspheres (MS) with a diameter of 90 μm are prepared and have a coefficient of variation of 6.8%. The modular fashion of self-assembly process in a microfluidic chip is the crucial factor in fabricating the multifunction material. The assembled microspheres with different building modules still have a specific surface area larger than 400 m2 g-1, and exhibit excellent performance in adsorbing various pollutants in water, such as heavy metal ions and organic dyes. The adsorption capacities of them to Hg2+ and orange II reach 150 mg g-1 and 333 mg g-1, respectively. The integrated fluorescence probes in microspheres can detect low concentration (9.8 ppb) of Hg2+. Microspheres integrated with Fe3O4 nanoparticles have a magnetic susceptibility of 6.01 emu g-1 and can be easily removed from wastewater by applying an external magnetic. Due to the stability of inorganic building blocks, each function in the assembled system is well performed, and multi-functional "All-in-One" materials can be easily fabricated.
Collapse
Affiliation(s)
- Baojun Ding
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Jie Wang
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Shengyang Tao
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China.
| | - Yunzhe Ding
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Lijing Zhang
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Ning Gao
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Guangtao Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Haonan Shi
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Weijun Li
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| | - Shuo Ge
- Department of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
| |
Collapse
|
21
|
The effect of changes in pH on the depression of talc by chitosan and the associated mechanisms. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
22
|
New oligochitosan-nanosilica hybrid materials: preparation and application on chili plants for resistance to anthracnose disease and growth enhancement. Polym J 2017. [DOI: 10.1038/pj.2017.58] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
23
|
Alison L, Rühs PA, Tervoort E, Teleki A, Zanini M, Isa L, Studart AR. Pickering and Network Stabilization of Biocompatible Emulsions Using Chitosan-Modified Silica Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13446-13457. [PMID: 27935304 DOI: 10.1021/acs.langmuir.6b03439] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Edible solid particles constitute an attractive alternative to surfactants as stabilizers of food-grade emulsions for products requiring a long-term shelf life. Here, we report on a new approach to stabilize edible emulsions using silica nanoparticles modified by noncovalently bound chitosan oligomers. Electrostatic modification with chitosan increases the hydrophobicity of the silica nanoparticles and favors their adsorption at the oil-water interface. The interfacial adsorption of the chitosan-modified silica particles enables the preparation of oil-in-water emulsions with small droplet sizes of a few micrometers through high-pressure homogenization. This approach enables the stabilization of food-grade emulsions for more than 3 months. The emulsion structure and stability can be effectively tuned by controlling the extent of chitosan adsorption on the silica particles. Bulk and interfacial rheology are used to highlight the two stabilization mechanisms involved. Low chitosan concentration (1 wt % with respect to silica) leads to the formation of a viscoelastic film of particles adsorbed at the oil-water interface, enabling Pickering stabilization of the emulsion. By contrast, a network of agglomerated particles formed around the droplets is the predominant stabilization mechanism of the emulsions at higher chitosan content (5 wt % with respect to silica). These two pathways against droplet coalescence and coarsening open up different possibilities to engineer the long-term stabilization of emulsions for food applications.
Collapse
Affiliation(s)
| | | | | | - Alexandra Teleki
- Nutrition R&D Center Formulation and Application, DSM Nutritional Products Ltd. , P.O. Box 2676, 4002 Basel, Switzerland
| | | | | | | |
Collapse
|
24
|
Pini N, Lima D, Lovadino J, Ganss C, Schlueter N. In vitro Efficacy of Experimental Chitosan-Containing Solutions as Anti-Erosive Agents in Enamel. Caries Res 2016; 50:337-45. [DOI: 10.1159/000445758] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/22/2016] [Indexed: 11/19/2022] Open
Abstract
The present study evaluated the effect of chitosans with different viscosities, dissolved in an AmF/SnCl2 solution, against erosion or erosion/abrasion. A total of 192 specimens were assigned to 2 × 6 groups (n = 16 specimens each): negative control, 4 chitosan solutions (groups Ch50, Ch500, Ch1000, and Ch2000, with viscosity of 50, 500, 1,000, or 2,000 mPas, respectively, 0.5% chitosan, 500 ppm F-, 800 ppm Sn2+, pH 4.4), and positive control (500 ppm F-, 800 ppm Sn2+, pH 4.3). One half of the groups was demineralized (experiment 1, E1; 10 days, 6 × 2 min/day, 0.5% citric acid, pH 2.8) and exposed to solutions (2 × 2 min/day); the other half was additionally brushed (15 s, 200 g) with non-fluoridated toothpaste before solution immersion (experiment 2, E2). Treatment effects were investigated by profilometry, energy-dispersive X-ray spectroscopy and scanning electron microscopy (SEM). In E1, all the chitosan-containing solutions reduced enamel loss by 77-80%, to the same extent as the positive control, except for Ch2000 (p ≤ 0.05), which completely inhibited tissue loss by the formation of precipitates. In E2, Ch50 and Ch500 showed best performance, with approximately 60% reduction of tissue loss compared to the negative control group (p ≤ 0.05 compared to other groups). SEM analysis showed differences between negative control and the other groups but only minor differences amongst the groups treated with active agents. In both E1 and E2, treatment with active agents resulted in surface enrichment of carbon and tin compared to negative control (p ≤ 0.001); brushing removed parts of carbon and tin (p ≤ 0.001). Chitosan shows different properties under erosive and erosive/abrasive conditions. Under erosive conditions high viscosity might be helpful, whereas lower viscosity seems to be more effective in cases of chemo-mechanical challenges.
Collapse
|
25
|
Tiraferri A, Borkovec M. Probing effects of polymer adsorption in colloidal particle suspensions by light scattering as relevant for the aquatic environment: An overview. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 535:131-140. [PMID: 25434471 DOI: 10.1016/j.scitotenv.2014.11.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Revised: 11/19/2014] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
Modification of particle surfaces by adsorption of polymers is a process that governs particle behavior in aqueous environmental systems. The present article briefly reviews the current understanding of the adsorption mechanisms and the properties of the resulting layers, and it discusses two environmentally relevant cases of particle modification by polymers. In particular, the discussion focuses on the usefulness of methods based on light scattering to probe such adsorbed layers together with the resulting properties of the particle suspensions, and it highlights advantages and disadvantages of these techniques. Measurement of the electrophoretic mobility allows to follow the development of the adsorption layer and to characterize the charge of the modified particles. At saturation, the surface charge is governed by the charge of the adsorbed film. Dynamic light scattering provides information on the film thickness and on the behavior of the modified suspensions. The charge and the structure of the adsorbed layer influence the stability of the particles, as well as the applicability of the classical theory of Derjaguin, Landau, Verwey, and Overbeek (DLVO). This fundamental knowledge is presented in the light of environmental systems and its significance for applied systems is underlined. In particular, the article discusses two examples of environmental processes involving adsorption of polymers, namely, the modification of particles by natural adsorption of humic substances and the tailoring of surface properties of iron-based particles used to remediate contaminated aquifers.
Collapse
Affiliation(s)
- Alberto Tiraferri
- Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland.
| | - Michal Borkovec
- Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
| |
Collapse
|
26
|
Rodenhausen KB, Davis RS, Sekora D, Liang D, Mock A, Neupane R, Schmidt D, Hofmann T, Schubert E, Schubert M. The retention of liquid by columnar nanostructured surfaces during quartz crystal microbalance measurements and the effects of adsorption thereon. J Colloid Interface Sci 2015; 455:226-35. [DOI: 10.1016/j.jcis.2015.05.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2015] [Revised: 05/19/2015] [Accepted: 05/20/2015] [Indexed: 12/31/2022]
|
27
|
Tiraferri A, Maroni P, Borkovec M. Adsorption of polyelectrolytes to like-charged substrates induced by multivalent counterions as exemplified by poly(styrene sulfonate) and silica. Phys Chem Chem Phys 2015; 17:10348-52. [PMID: 25820795 DOI: 10.1039/c5cp00910c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The present study demonstrates that multivalent counterions trigger adsorption of polyelectrolytes on a like-charged substrate. In particular, adsorption of polystyrene sulfonate on silica is studied experimentally in NaCl, MgCl2, and LaCl3 solutions by optical reflectivity. While adsorption is negligible in the presence of Na(+), the polyelectrolyte adsorbs in the presence of Mg(2+) and La(3+). The adsorbed amount of the polyelectrolyte goes through a maximum as a function of the salt concentration. This maximum increases with increasing valence and shifts to lower salt concentrations. At low salt concentration, the adsorption is negligible. At intermediate salt level, ripening and multilayer formation leads to continuous growth of the adsorbed layer. At higher salt level, blocking and formation of a monolayer lead to saturation. These results are tentatively interpreted in terms of a charge reversal of the polyelectrolyte-metal complex. The molecular mass of the polyelectrolyte has an important effect on the adsorption behavior, whereby the tendency towards ripening becomes more pronounced at large molecular mass.
Collapse
Affiliation(s)
- Alberto Tiraferri
- Department of Environment, Land, and Infrastructure Engineering, Polytechnic University of Turin, Torino, Italy
| | | | | |
Collapse
|
28
|
Voisin H, Aimé C, Coradin T. Understanding and Tuning Bioinorganic Interfaces for the Design of Bionanocomposites. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500403] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|
29
|
Maroni P, Montes Ruiz-Cabello FJ, Cardoso C, Tiraferri A. Adsorbed Mass of Polymers on Self-Assembled Monolayers: Effect of Surface Chemistry and Polymer Charge. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6045-6054. [PMID: 25993382 DOI: 10.1021/acs.langmuir.5b01103] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The adsorbed mass of polymers on surfaces with different chemistry is presented, and the related adsorption mechanism is discussed. Strong and weak polyelectrolytes of negative and positive charge are studied, as well as an uncharged polymer. Self-assembled monolayers of alkanethiols on gold are used in reflectometry and quartz crystal microbalance (QCM-D) experiments as adsorbing substrates bearing different terminal moieties, namely, methyl, hydroxyl, carboxyl, and amine groups. The various polymer-surface combinations allow the systematic investigation of the role of surface chemistry and polymer charge on adsorbed amount. Interactions of different nature and range drive polymer adsorption: the measured adsorbed amounts reveal information about their relative contribution. When electrostatic chain-surface attraction is present, the largest adsorbed masses are observed. However, significant mass is measured even when an electrostatic barrier to adsorption is present, suggesting the importance of forces of nonelectrostatic origin, which include both hydrophobic interactions and specific forces acting at short distances. This mechanism results in large adsorbed amounts for the adsorption of weak polyelectrolytes, and it is apparent especially in the adsorption behavior of a neutral polymer.
Collapse
Affiliation(s)
- Plinio Maroni
- †Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
| | - Francisco Javier Montes Ruiz-Cabello
- †Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
- ‡Biocolloid and Fluid Physics Group, Applied Physics Department, Faculty of Sciences, University of Granada, Fuente Nueva s/n, 18071 Granada, Spain
| | - Catia Cardoso
- †Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
| | - Alberto Tiraferri
- †Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland
- §Department of Land, Environment and Infrastructure Engineering (DIATI), Polytechnic University of Turin, C.so Duca degli Abruzzi 24, 10129 Torino, Italy
| |
Collapse
|
30
|
Martin EJ, Mathew MT, Shull KR. Viscoelastic properties of electrochemically deposited protein/metal complexes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:4008-4017. [PMID: 25780816 DOI: 10.1021/acs.langmuir.5b00169] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The interfacial gelation of proteins at metallic surfaces was investigated with an electrochemical quartz crystal microbalance (QCM). When Cr electrodes were corroded in proteinaceous solutions, it was found that gels will form at the Cr surfaces if molybdate ions are also present in the solution. Gelation is reversible and can also be controlled with the electrochemical potential at the electrode. Further, a method was developed to characterize the viscoelastic properties of thin films in liquid media using the QCM as a high-frequency rheometer. By measuring the frequency and dissipation at multiple harmonics of the resonance frequency, the viscoelastic phase angle, density-modulus product, and areal mass of a film can be determined. The method was applied to characterize the protein films, demonstrating that they have a phase angle near 55° and a density-modulus product of ≈10(7) Pa·g/cm(3). Data imply that the gels are composed of a weakly cross-linked proteinaceous network with properties similar to albumin solutions with concentrations in the range of ≈40 wt %.
Collapse
Affiliation(s)
- Elizabeth J Martin
- †Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Mathew T Mathew
- ‡Department of Orthopedics, Rush University Medical Center, Chicago, Illinois 60612, United States
| | - Kenneth R Shull
- †Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| |
Collapse
|
31
|
Wang Y, Wohlert J, Bergenstråhle-Wohlert M, Tu Y, Ågren H. Molecular mechanisms for the adhesion of chitin and chitosan to montmorillonite clay. RSC Adv 2015. [DOI: 10.1039/c5ra06424d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Molecular dynamics simulations were used to study the wet adhesion of chitin and chitosan oligomers to montmorillonite clay.
Collapse
Affiliation(s)
- Yan Wang
- Division of Theoretical Chemistry and Biology
- School of Biotechnology
- KTH Royal Institute of Technology
- SE-106 91 Stockholm
- Sweden
| | - Jakob Wohlert
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - Malin Bergenstråhle-Wohlert
- Department of Fibre and Polymer Technology
- School of Chemical Science and Engineering
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - Yaoquan Tu
- Division of Theoretical Chemistry and Biology
- School of Biotechnology
- KTH Royal Institute of Technology
- SE-106 91 Stockholm
- Sweden
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology
- School of Biotechnology
- KTH Royal Institute of Technology
- SE-106 91 Stockholm
- Sweden
| |
Collapse
|
32
|
Maroni P, Ruiz-Cabello FJM, Tiraferri A. Studying the role of surface chemistry on polyelectrolyte adsorption using gold-thiol self-assembled monolayer with optical reflectivity. SOFT MATTER 2014; 10:9220-9225. [PMID: 25313852 DOI: 10.1039/c4sm02093f] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Self-assembled monolayers of thiols on gold are employed to study the role of surface chemistry on adsorption of polyelectrolytes to solid substrates. The suitability of these substrates is demonstrated in optical reflectivity, which combines high sensitivity to the possibility to precisely control the hydrodynamic conditions at the solid/water interface. Therefore, this system allows the determination of both the adsorbed amount and the kinetics of adsorption. The behavior of two representative strong polyelectrolytes of opposite charge is discussed as a function of pH and of concentration of a monovalent electrolyte in aqueous solutions. The application of equivalent substrates with varying surface chemistry sheds light on the role of different energetic contributions driving polyelectrolyte adsorption.
Collapse
Affiliation(s)
- Plinio Maroni
- Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, Quai Ernest-Ansermet 30, 1205 Geneva, Switzerland.
| | | | | |
Collapse
|
33
|
Pigaleva MA, Portnov IV, Rudov AA, Blagodatskikh IV, Grigoriev TE, Gallyamov MO, Potemkin II. Stabilization of Chitosan Aggregates at the Nanoscale in Solutions in Carbonic Acid. Macromolecules 2014. [DOI: 10.1021/ma501169c] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marina A. Pigaleva
- Faculty
of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, GSP-1, Moscow 119991, Russian Federation
| | - Ivan V. Portnov
- Faculty
of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, GSP-1, Moscow 119991, Russian Federation
| | - Andrey A. Rudov
- Faculty
of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, GSP-1, Moscow 119991, Russian Federation
- DWI - Leibniz
Institute for Interactive Materials, Forckenbeckstraße 50, Aachen 52056, Germany
| | - Inesa V. Blagodatskikh
- Nesmeyanov Institute
of Organoelement Compounds RAS, Moscow, Vavilova 28,
GSP-1, Moscow 119991, Russian Federation
| | - Timofei E. Grigoriev
- Nesmeyanov Institute
of Organoelement Compounds RAS, Moscow, Vavilova 28,
GSP-1, Moscow 119991, Russian Federation
| | - Marat O. Gallyamov
- Faculty
of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, GSP-1, Moscow 119991, Russian Federation
- Nesmeyanov Institute
of Organoelement Compounds RAS, Moscow, Vavilova 28,
GSP-1, Moscow 119991, Russian Federation
| | - Igor I. Potemkin
- Faculty
of Physics, Lomonosov Moscow State University, Leninskie gory 1-2, GSP-1, Moscow 119991, Russian Federation
- DWI - Leibniz
Institute for Interactive Materials, Forckenbeckstraße 50, Aachen 52056, Germany
| |
Collapse
|