1
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Alotaibi B, Khan AK, Ijaz M, Yasin H, Nawazish S, Sadiq S, Kaleem S, Murtaza G. Development, Characterization, and Burn Wound-Healing Potential of Neomycin-Loaded Clay-Reinforced Nanofibers. ACS OMEGA 2023; 8:39014-39022. [PMID: 37901515 PMCID: PMC10601437 DOI: 10.1021/acsomega.3c03593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 09/27/2023] [Indexed: 10/31/2023]
Abstract
Background: Skin wounds affect millions of individuals around the world, and their treatment is expensive. Objective: The purpose of this study was to make neomycin-loaded CG/PVA/PAN (NCPP) nanofibers to improve wound healing. Methods: The NCPP nanofibers were characterized by using thermogravimetric analysis (TGA), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, and X-ray diffraction. Drug solubility, dissolution, swelling ratio, erosion, and antibacterial studies were performed. The in vivo wound healing study of nanofibers was performed in a rabbit model and was supported by % age wound closure and histopathology. Results: The results of SEM showed some sort of agglomeration on the surface of fibers, while TGA showed 10% more stability for drug-loaded nanofibers. The drug permeation study indicated that the formulation with 15% PVA showed a controlled release profile of the drug. The NCPP nanofibers had an appreciable water retention capability. The NCPP nanofibers showed appreciable antibacterial activity against Enterococcus faecalis (Gram-positive bacteria) and Klebsiella pneumonia (Gram-negative bacteria). The wound healing study showed the better healing properties of NCPP nanofibers within 15 days. Conclusion: The findings helped us to conclude that the NCPP nanofibers were successfully fabricated and found to have a promising role in infected wound healing.
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Affiliation(s)
- Badriyah
Shadid Alotaibi
- Department
of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Abida Kalsoom Khan
- Department
of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Munaza Ijaz
- Department
of Microbiology, University of Central Punjab, Lahore 54000, Pakistan
| | - Haya Yasin
- Department
of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman 346, United Arab Emirates
| | - Shamyla Nawazish
- Department
of Environmental Sciences, COMSATS University
Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Shazma Sadiq
- Department
of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Saba Kaleem
- Department
of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Ghulam Murtaza
- Department
of Pharmacy, COMSATS University Islamabad, Lahore Campus, Lahore 54000, Pakistan
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2
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Rolandi AC, Pozo-Gonzalo C, de Meatza I, Casado N, Forsyth M, Mecerreyes D. Carrageenans as Sustainable Water-Processable Binders for High-Voltage NMC811 Cathodes. ACS APPLIED ENERGY MATERIALS 2023; 6:8616-8625. [PMID: 37654436 PMCID: PMC10466266 DOI: 10.1021/acsaem.3c01662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/02/2023] [Indexed: 09/02/2023]
Abstract
Poly(vinylidene fluoride) (PVDF) is the most common binder for cathode electrodes in lithium-ion batteries. However, PVDF is a fluorinated compound and requires toxic N-methyl-2-pyrrolidone (NMP) as a solvent during the slurry preparation, making the electrode fabrication process environmentally unfriendly. In this study, we propose the use of carrageenan biopolymers as a sustainable source of water-processable binders for high-voltage NMC811 cathodes. Three types of carrageenan (Carr) biopolymers were investigated, with one, two, or three sulfonate groups (SO3-), namely, kappa, iota, and lambda carrageenans, respectively. In addition to the nature of carrageenans, this article also reports the optimization of the cathode formulations, which were prepared by using between 5 wt % of the binder to a lower amount of 2 wt %. Processing of the aqueous slurries and the nature of the binder, in terms of the morphology and electrochemical performance of the electrodes, were also investigated. The Carr binder with 3SO3- groups (3SO3-Carr) exhibited the highest discharge capacities, delivering 133.1 mAh g-1 at 3C and 105.0 mAh g-1 at 5C, which was similar to the organic-based PVDF electrode (136.1 and 108.7 mAh g-1, respectively). Furthermore, 3SO3-Carr reached an outstanding capacity retention of 91% after 90 cycles at 0.5C, which was attributed to a homogeneous NMC811 and a conductive carbon particle dispersion, superior adhesion strength to the current collector (17.3 ± 0.7 N m-1 vs 0.3 ± 0.1 N m-1 for PVDF), and reduced charge-transfer resistance. Postmortem analysis unveiled good preservation of the NMC811 particles, while the 1SO3-Carr and 2SO3-Carr electrodes showed damaged morphologies.
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Affiliation(s)
- Ana Clara Rolandi
- Institute
for Frontier Materials, Deakin University, Melbourne 3125, Australia
- CIDETEC
Basque Research and Technology Alliance (BRTA), Paseo Miramon 196, 20014 Donostia-San Sebastian, Spain
- POLYMAT, University
of the Basque Country UPV/EHU, Avenida Tolosa 72, Donostia-San Sebastián 20018, Spain
| | | | - Iratxe de Meatza
- CIDETEC
Basque Research and Technology Alliance (BRTA), Paseo Miramon 196, 20014 Donostia-San Sebastian, Spain
| | - Nerea Casado
- POLYMAT, University
of the Basque Country UPV/EHU, Avenida Tolosa 72, Donostia-San Sebastián 20018, Spain
- IKERBASQUE,
Basque Foundation for Science, Bilbao 48011, Spain
| | - Maria Forsyth
- Institute
for Frontier Materials, Deakin University, Melbourne 3125, Australia
- POLYMAT, University
of the Basque Country UPV/EHU, Avenida Tolosa 72, Donostia-San Sebastián 20018, Spain
- IKERBASQUE,
Basque Foundation for Science, Bilbao 48011, Spain
| | - David Mecerreyes
- POLYMAT, University
of the Basque Country UPV/EHU, Avenida Tolosa 72, Donostia-San Sebastián 20018, Spain
- IKERBASQUE,
Basque Foundation for Science, Bilbao 48011, Spain
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3
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Weon SH, Han J, Choi YK, Park S, Lee SH. Development of Blended Biopolymer-Based Photocatalytic Hydrogel Beads for Adsorption and Photodegradation of Dyes. Gels 2023; 9:630. [PMID: 37623085 PMCID: PMC10454056 DOI: 10.3390/gels9080630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 07/28/2023] [Accepted: 08/04/2023] [Indexed: 08/26/2023] Open
Abstract
Blended biopolymer-based photocatalytic hydrogel beads were synthesized by dissolving the biopolymers in 1-ethyl-3-methylimidazolium acetate ([Emim][Ac]), adding TiO2, and reconstituting the beads with ethanol. The incorporation of modifying biopolymer significantly enhanced the adsorption capacity of the cellulose/TiO2 beads. Cellulose/carrageenan/TiO2 beads exhibited a 7.0-fold increase in adsorption capacity for methylene blue (MB). In contrast, cellulose/chitosan/TiO2 beads showed a 4.8-fold increase in adsorption capacity for methyl orange (MO) compared with cellulose/TiO2 beads. In addition, cellulose/TiO2 microbeads were prepared through the sol-gel transition of the [Emim][Ac]-in-oil emulsion to enhance photodegradation activity. These microbeads displayed a 4.6-fold higher adsorption capacity and 2.8-fold higher photodegradation activity for MB than the millimeter-sized beads. Furthermore, they exhibited superior dye removal efficiencies for various dyes such as Congo red, MO, MB, crystal violet, and rhodamine B, surpassing the performance of larger beads. To expand the industrial applicability of the microbeads, biopolymer/TiO2 magnetic microbeads were developed by incorporating Fe2O3. These magnetic microbeads outperformed millimeter-sized beads regarding the efficiency and time required for MB removal from aqueous solutions. Furthermore, the physicochemical properties of magnetic microbeads can be easily controlled by adjusting the type of biopolymer modifier, the TiO2 and magnetic particle content, and the ratio of each component based on the target molecule. Therefore, biopolymer-based photocatalytic magnetic microbeads have great potential not only in environmental fields but also in biomedical fields.
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Affiliation(s)
- Seung Hyeon Weon
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea; (S.H.W.); (J.H.); (Y.-K.C.)
| | - Jiwoo Han
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea; (S.H.W.); (J.H.); (Y.-K.C.)
| | - Yong-Keun Choi
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea; (S.H.W.); (J.H.); (Y.-K.C.)
- R&D Center, ChoiLab Inc., Seoul 01811, Republic of Korea
| | - Saerom Park
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea; (S.H.W.); (J.H.); (Y.-K.C.)
- R&D Center, ChoiLab Inc., Seoul 01811, Republic of Korea
| | - Sang Hyun Lee
- Department of Biological Engineering, Konkuk University, Seoul 05029, Republic of Korea; (S.H.W.); (J.H.); (Y.-K.C.)
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4
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Hopson C, Rigual V, Alonso MV, Oliet M, Rodriguez F. Eucalyptus bleached kraft pulp-ionic liquid inks for 3D printing of ionogels and hydrogels. Carbohydr Polym 2023; 313:120897. [PMID: 37182980 DOI: 10.1016/j.carbpol.2023.120897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 03/22/2023] [Accepted: 04/07/2023] [Indexed: 05/16/2023]
Abstract
3D printing has been recently recognized as one of the most promising technologies due to the multiple options to fabricate cost-effective and customizable objects. However, the necessity to substitute fossil fuels as raw materials is increasing the research on bio-based inks with recyclable and eco-friendly properties. In this work, we formulated inks for the 3D printing of ionogels and hydrogels with bleached kraft pulp dissolved in [Emim][DMP] at different concentrations (1-4 wt%). We explored each ink's rheological properties and printability and compared the printability parameters with a commercial ink. The rheological results showed that the 3 % and 4 % cellulose-ionic liquid inks exhibited the best properties. Both had values of damping factor between 0.4 and 0.7 and values of yield stress between 1900 and 2500 Pa. Analyzing the printability, the 4 wt% ink was selected as the most promising because the printed ionogels and the hydrogels had the best print resolution and fidelity, similar to the reference ink. After printing, ionogels and hydrogels had values of the elastic modulus (G') between 103 and 104 Pa, and the ionogels are recyclables. Altogether, these 3D printed cellulose ionogels and hydrogels may have an opportunity in the electrochemical and medical fields, respectively.
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Affiliation(s)
- Cynthia Hopson
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain.
| | - Victoria Rigual
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - M Virginia Alonso
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - Mercedes Oliet
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - Francisco Rodriguez
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
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5
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Chavez-Baldovino E, Malca-Reyes CA, Masso R, Feng P, Camacho A, Sarmiento J, Borrero Negrón JI, Pagán-Torres YJ, Díaz-Vázquez LM. Optimizing Sustainable Energy Generation in Ethanol Fuel Cells: An Exploration of Carrageenan with TiO 2 Nanoparticles and Ni/CeO 2 Composites. ACS OMEGA 2023; 8:20642-20653. [PMID: 37332776 PMCID: PMC10268622 DOI: 10.1021/acsomega.3c01188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 05/18/2023] [Indexed: 06/20/2023]
Abstract
Based on the search for new biodegradable materials that are low cost and easy to synthesize by environmentally friendly methods, we report the use of carrageenan membranes (mixture of κ and λ carrageenans) with different concentrations of titanium dioxide nanoparticles (TiO2 NPs) and Ni/CeO2 (10 wt % Ni) for the fabrication of a novel fuel cell electrode for the oxidation of ethanol. Each membrane was characterized to determine its physicochemical properties using X-ray diffraction (XRD), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) spectroscopy. Using impedance spectroscopy (IS), a maximum value of 2.08 × 10-4 S/cm in ionic conductivity was found for the carrageenan nanocomposite with a concentration of 5 wt % TiO2 NPs (CR5%). Due to its high conductivity values, the CR5% membrane was mixed with Ni/CeO2 to prepare the working electrode for cyclic voltammetry measurements. Using a solution of 1 M ethanol and 1 M KOH, the oxidation of ethanol over CR5% + Ni/CeO2 resulted in peak current density values at forward and reverse scan voltages of 9.52 and 12.22 mA/cm2, respectively. From our results, the CR5% + Ni/CeO2 membrane proves to be more efficient in the oxidation of ethanol compared with commercially available Nafion membranes containing Ni/CeO2.
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Affiliation(s)
| | - Carlos A. Malca-Reyes
- Department
of Physics, University of Puerto Rico-Rio
Piedras, San Juan 00925-2537, Puerto Rico
| | - Roberto Masso
- Department
of Physics, University of Puerto Rico-Rio
Piedras, San Juan 00925-2537, Puerto Rico
| | - Peter Feng
- Department
of Physics, University of Puerto Rico-Rio
Piedras, San Juan 00925-2537, Puerto Rico
| | - Adrian Camacho
- Department
of Physics, University of Puerto Rico-Rio
Piedras, San Juan 00925-2537, Puerto Rico
| | - Janeth Sarmiento
- Instituto
de Ciencias BUAP, Benemérita Universidad
Autónoma de Puebla, Puebla 72530, México
| | - Justin I. Borrero Negrón
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez 00681-9000, Puerto
Rico
| | - Yomaira J. Pagán-Torres
- Department
of Chemical Engineering, University of Puerto
Rico, Mayagüez Campus, Mayagüez 00681-9000, Puerto
Rico
| | - Liz M. Díaz-Vázquez
- Department
of Chemistry, University of Puerto Rico-Rio
Piedras, 17 Ave. Universidad #1701, San Juan 00925-2537, Puerto
Rico
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6
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Lu Z, Lee PR, Yang H. Kappa-carrageenan improves the gelation and structures of soy protein isolate through the formation of hydrogen bonding and electrostatic interactions. Food Hydrocoll 2023. [DOI: 10.1016/j.foodhyd.2023.108585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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7
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Hu X, Zhang L, Yan L, Tang L. Recent Advances in Polysaccharide-Based Physical Hydrogels and Their Potential Applications for Biomedical and Wastewater Treatment. Macromol Biosci 2022; 22:e2200153. [PMID: 35584011 DOI: 10.1002/mabi.202200153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 05/10/2022] [Indexed: 11/06/2022]
Abstract
Polysaccharides have been widely employed to fabricate hydrogels owing to their intrinsic properties including biocompatibility, biodegradability, sustainability, and easy modification. However, a considerable amount of polysaccharide-based hydrogels are prepared by chemical crosslinking method using organic solvents or toxic crosslinkers. The presence of reaction by-products and residual toxic substances in the obtained materials cause a potential secondary pollution risk and thus severely limited their practical applications. In contrast, polysaccharide-based physical hydrogels are preferred over chemically derived hydrogels and can be used to address existing drawbacks of chemical hydrogels. The polysaccharide chains of such hydrogel are typically crosslinked by dynamic non-covalent bonds, and the co-existence of multiple physical interactions stabilize the hydrogel network. This review focuses on providing a detailed outlook for the design strategies and formation mechanisms of polysaccharide-based physical hydrogels as well as their specific applications in tissue engineering, drug delivery, wound healing, and wastewater treatment. The main preparation principles, future challenges, and potential improvements are also outlined. The authors hope that this review could provide valuable information for the rational fabrication of polysaccharide-based physical hydrogel. The specific research works listed in the review will provide a systematic and solid research basis for the reliable development of polysaccharide-based physical hydrogel. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Xinyu Hu
- Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, 210042, China.,Research Institute of Forestry New Technology, CAF, Beijing, 100091, China
| | - Liangliang Zhang
- Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, 210042, China
| | - Linlin Yan
- Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, 210042, China.,Research Institute of Forestry New Technology, CAF, Beijing, 100091, China
| | - Lihua Tang
- Institute of Chemical Industry of Forest Products, CAF, Key Lab. of Biomass Energy and Material, Jiangsu Province, National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass, Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing, 210042, China
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8
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Izawa H, Yonemura T, Nakamura Y, Toyoshima Y, Kawakami M, Saimoto H, Ifuku S. Hierarchical surface wrinkles and bumps generated on chitosan films having double-skin layers comprising topmost carrageenan layers and polyion complex layers. Carbohydr Polym 2022; 284:119224. [DOI: 10.1016/j.carbpol.2022.119224] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 01/20/2022] [Accepted: 02/02/2022] [Indexed: 12/17/2022]
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9
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Rotjanasuworapong K, Thummarungsan N, Lerdwijitjarud W, Sirivat A. Electromechanical responses of agarose ionogels as highly soft and compliant actuators. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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10
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Nontoxic double-network polymeric hybrid aerogel functionalized with reduced graphene oxide: Preparation, characterization, and evaluation as drug delivery agent. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-02902-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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11
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Wan MC, Qin W, Lei C, Li QH, Meng M, Fang M, Song W, Chen JH, Tay F, Niu LN. Biomaterials from the sea: Future building blocks for biomedical applications. Bioact Mater 2021; 6:4255-4285. [PMID: 33997505 PMCID: PMC8102716 DOI: 10.1016/j.bioactmat.2021.04.028] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2021] [Revised: 04/15/2021] [Accepted: 04/17/2021] [Indexed: 02/08/2023] Open
Abstract
Marine resources have tremendous potential for developing high-value biomaterials. The last decade has seen an increasing number of biomaterials that originate from marine organisms. This field is rapidly evolving. Marine biomaterials experience several periods of discovery and development ranging from coralline bone graft to polysaccharide-based biomaterials. The latter are represented by chitin and chitosan, marine-derived collagen, and composites of different organisms of marine origin. The diversity of marine natural products, their properties and applications are discussed thoroughly in the present review. These materials are easily available and possess excellent biocompatibility, biodegradability and potent bioactive characteristics. Important applications of marine biomaterials include medical applications, antimicrobial agents, drug delivery agents, anticoagulants, rehabilitation of diseases such as cardiovascular diseases, bone diseases and diabetes, as well as comestible, cosmetic and industrial applications.
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Affiliation(s)
- Mei-chen Wan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Wen Qin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Chen Lei
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Qi-hong Li
- Department of Stomatology, The Fifth Medical Centre, Chinese PLA General Hospital (Former 307th Hospital of the PLA), Dongda Street, Beijing, 100071, PR China
| | - Meng Meng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Ming Fang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Wen Song
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Ji-hua Chen
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
| | - Franklin Tay
- College of Graduate Studies, Augusta University, Augusta, GA, 30912, USA
| | - Li-na Niu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University, Xi'an, Shaanxi, 710032, PR China
- The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang, Henan, 453000, PR China
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12
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Hopson C, Villar-Chavero MM, Domínguez JC, Alonso MV, Oliet M, Rodriguez F. Cellulose ionogels, a perspective of the last decade: A review. Carbohydr Polym 2021; 274:118663. [PMID: 34702482 DOI: 10.1016/j.carbpol.2021.118663] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/04/2021] [Accepted: 09/08/2021] [Indexed: 11/19/2022]
Abstract
Cellulose ionogels have been extensively studied due to the variability of their properties and applications. The capability of trapping an ionic liquid in a biodegradable solid matrix without losing its properties makes this type of material a promising substitute for fossil fuel-derived materials. The possibility to formulate ionogels chemically or physically, to choose between different ionic liquids, cellulose types, and the possibility to add a wide range of additives, make these ionogels an adaptable material that can be modified for each target application in many fields such as medicine, energy storage, electrochemistry, etc. The aim of this review is to show its versatility and to provide a summary picture of the advances in the field of cellulose ionogels formulation (chemical or physical methods), as well as their potential applications, so this review will serve as a stimulus for research on these materials in the future.
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Affiliation(s)
- Cynthia Hopson
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain.
| | - M Mar Villar-Chavero
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - Juan C Domínguez
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - M Virginia Alonso
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - Mercedes Oliet
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
| | - Francisco Rodriguez
- Chemical Engineering and Materials Department, Complutense University of Madrid, Av. Complutense S/N, 28040 Madrid, Spain
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13
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Ventura MG, Pullert T, Risso R, Matos I, Fonseca I, Vital JM. Composite catalytic materials based on k-carrageenan and CaO used on the transesterification of soybean oil for the process of biodiesel obtention. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Chemical Modification of Glycosaminoglycan Polysaccharides. Molecules 2021; 26:molecules26175211. [PMID: 34500644 PMCID: PMC8434129 DOI: 10.3390/molecules26175211] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/20/2021] [Accepted: 08/21/2021] [Indexed: 12/16/2022] Open
Abstract
The linear anionic class of polysaccharides, glycosaminoglycans (GAGs), are critical throughout the animal kingdom for developmental processes and the maintenance of healthy tissues. They are also of interest as a means of influencing biochemical processes. One member of the GAG family, heparin, is exploited globally as a major anticoagulant pharmaceutical and there is a growing interest in the potential of other GAGs for diverse applications ranging from skin care to the treatment of neurodegenerative conditions, and from the treatment and prevention of microbial infection to biotechnology. To realize the potential of GAGs, however, it is necessary to develop effective tools that are able to exploit the chemical manipulations to which GAGs are susceptible. Here, the current knowledge concerning the chemical modification of GAGs, one of the principal approaches for the study of the structure-function relationships in these molecules, is reviewed. Some additional methods that were applied successfully to the analysis and/or processing of other carbohydrates, but which could be suitable in GAG chemistry, are also discussed.
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15
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Khoshkho SM, Tanhaei B, Ayati A, Kazemi M. Preparation and characterization of ionic and non-ionic surfactants impregnated κ-carrageenan hydrogel beads for investigation of the adsorptive mechanism of cationic dye to develop for biomedical applications. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115118] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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16
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Bio-ionic liquid promoted selective coagulation of κ-carrageenan from Kappaphycus alvarezii extract. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106382] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Liu J, Obaidi I, Nagar S, Scalabrino G, Sheridan H. The antiviral potential of algal-derived macromolecules. CURRENT RESEARCH IN BIOTECHNOLOGY 2021. [DOI: 10.1016/j.crbiot.2021.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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18
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Croitoru C, Roata IC, Pascu A, Stanciu EM. Diffusion and Controlled Release in Physically Crosslinked Poly (Vinyl Alcohol)/Iota-Carrageenan Hydrogel Blends. Polymers (Basel) 2020; 12:polym12071544. [PMID: 32668670 PMCID: PMC7407240 DOI: 10.3390/polym12071544] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 06/26/2020] [Accepted: 07/09/2020] [Indexed: 12/11/2022] Open
Abstract
This paper reports the obtaining of poly (vinyl alcohol) and i-carrageenan blend hydrogels by physical crosslinking (consecutive freeze-thaw cycles). The two polymers were completely miscible in the weight ratio interval used in this study, as determined by solution viscometry data. Strong interactions through hydrogen bonding and forming of mixed interpolymer crystalline domains were observed, which are responsible for the formation of stable drug release-tunable matrices. The release profiles of three model antibiotic drugs (amoxicillin, tetracycline hydrochloride, and gentamicin sulfate) were assessed in a pH interval between 3 and 7.3. They were found to be strongly dependent on the drug chemistry, mesh size of the hydrogels, swelling mechanism, and pH of the release medium. A decrease of up to 40% in the release rates and up to 10% in the diffusion coefficients of the model drugs was registered with the increase in i-carrageenan content.
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Affiliation(s)
- Catalin Croitoru
- Correspondence: (C.C.); (I.C.R.); Tel.: +40-748126598 (C.C.); +40-766290786 (I.C.R.)
| | - Ionut Claudiu Roata
- Correspondence: (C.C.); (I.C.R.); Tel.: +40-748126598 (C.C.); +40-766290786 (I.C.R.)
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Silva SS, Gomes JM, Rodrigues LC, Reis RL. Marine-Derived Polymers in Ionic Liquids: Architectures Development and Biomedical Applications. Mar Drugs 2020; 18:E346. [PMID: 32629815 PMCID: PMC7401240 DOI: 10.3390/md18070346] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/23/2020] [Accepted: 06/27/2020] [Indexed: 01/05/2023] Open
Abstract
Marine resources have considerable potential to develop high-value materials for applications in different fields, namely pharmaceutical, environmental, and biomedical. Despite that, the lack of solubility of marine-derived polymers in water and common organic solvents could restrict their applications. In the last years, ionic liquids (ILs) have emerged as platforms able to overcome those drawbacks, opening many routes to enlarge the use of marine-derived polymers as biomaterials, among other applications. From this perspective, ILs can be used as an efficient extraction media for polysaccharides from marine microalgae and wastes (e.g., crab shells, squid, and skeletons) or as solvents to process them in different shapes, such as films, hydrogels, nano/microparticles, and scaffolds. The resulting architectures can be applied in wound repair, bone regeneration, or gene and drug delivery systems. This review is focused on the recent research on the applications of ILs as processing platforms of biomaterials derived from marine polymers.
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Affiliation(s)
- Simone S. Silva
- 3B´s Research Group, I3Bs- Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, 4805-017 Barco, Guimarães, Portugal; (J.M.G.); (L.C.R.); (R.L.R.)
- ICVS/3B´s – PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - Joana M. Gomes
- 3B´s Research Group, I3Bs- Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, 4805-017 Barco, Guimarães, Portugal; (J.M.G.); (L.C.R.); (R.L.R.)
- ICVS/3B´s – PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - Luísa C. Rodrigues
- 3B´s Research Group, I3Bs- Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, 4805-017 Barco, Guimarães, Portugal; (J.M.G.); (L.C.R.); (R.L.R.)
- ICVS/3B´s – PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
| | - Rui L. Reis
- 3B´s Research Group, I3Bs- Research Institute on Biomaterials, Biodegradables and Biomimetics, University of Minho, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Avepark, 4805-017 Barco, Guimarães, Portugal; (J.M.G.); (L.C.R.); (R.L.R.)
- ICVS/3B´s – PT Government Associate Laboratory, 4805-017 Braga/Guimarães, Portugal
- The Discoveries Centre for Regenerative and Precision Medicine, Headquarters at University of Minho, Avepark, 4805-017 Barco, Guimarães, Portugal
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20
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Marine Algae Polysaccharides as Basis for Wound Dressings, Drug Delivery, and Tissue Engineering: A Review. JOURNAL OF MARINE SCIENCE AND ENGINEERING 2020. [DOI: 10.3390/jmse8070481] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The present review considers the physicochemical and biological properties of polysaccharides (PS) from brown, red, and green algae (alginates, fucoidans, carrageenans, and ulvans) used in the latest technologies of regenerative medicine (tissue engineering, modulation of the drug delivery system, and the design of wound dressing materials). Information on various types of modern biodegradable and biocompatible PS-based wound dressings (membranes, foams, hydrogels, nanofibers, and sponges) is provided; the results of experimental and clinical trials of some dressing materials in the treatment of wounds of various origins are analyzed. Special attention is paid to the ability of PS to form hydrogels, as hydrogel dressings meet the basic requirements set out for a perfect wound dressing. The current trends in the development of new-generation PS-based materials for designing drug delivery systems and various tissue-engineering scaffolds, which makes it possible to create human-specific tissues and develop target-oriented and personalized regenerative medicine products, are also discussed.
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21
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Simple and environmentally friendly preparation of cellulose hydrogels using an ionic liquid. Carbohydr Res 2020; 494:108054. [PMID: 32640372 DOI: 10.1016/j.carres.2020.108054] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 05/15/2020] [Accepted: 05/27/2020] [Indexed: 11/22/2022]
Abstract
In this study, we developed an easy process for the production of cellulose hydrogels over a wide concentration range by using an ionic liquid/DMSO mixed solution that can easily be recycled at room temperature and has low environmental impact. Cellulose was completely dissolved at 6 to 20 wt% with respect to the [BMIm][OAc]/DMSO mixed solution at room temperature and ambient pressure. Placing the cellulose solution in a mold and immersing it in deionized water caused solvent replacement of the [BMIm][OAc]/DMSO mixed solution with deionized water, making it easy to obtain a cellulose hydrogel without using a crosslinking agent. Approximately 80% of the ionic liquid could be reused by constructing a system that recovers the ionic liquid discharged from the cellulose solution during solvent replacement. The pore size, water content and mechanical strength of the cellulose hydrogel strongly depended on the concentration of the cellulose solution prepared using the [BMIm][OAc]/DMSO mixture. However, the crystallinity and thermal stability did not show a concentration dependence.
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22
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Dizon GC, Atkinson G, Argent SP, Santu LT, Amabilino DB. Sustainable sorbitol-derived compounds for gelation of the full range of ethanol-water mixtures. SOFT MATTER 2020; 16:4640-4654. [PMID: 32373900 DOI: 10.1039/d0sm00343c] [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
During the development of soft material systems inspired by green chemistry, we show that naturally occurring starting materials can be used to prepare mono- and di-benzylidene sorbitol derivatives. These compounds gelate a range of organic, aqueous (including with mono and divalent metal salt solutions) and ethanolic (ethanol-water) solutions, with the equimolar mixture of two of the gelators gelling all compositions from 100% ethanol to 100% water (something neither of the individual components do). We explored the influence of modifications to the acetal substituents on the formation of the compounds as well as the impact of steric bulk on self-assembly properties of the gelators. The effect of solvent on the self-assembly, morphology, and rheology of the 1,3:2,4-di(4-isopropylbenzylidene)-d-sorbitol (DBS-iPr), 2,4(4-isopropylbenzylidene)-d-sorbitol (MBS-iPr) and the equimolar multicomponent (DBS-MBS-iPr) gels have been investigated. DBS-iPr gelates polar solvents to form smooth flat fibres, whereas in non-polar solvents such as cyclohexane helical fibres grow where the chirality is determined by the stereochemistry of the sugar. Oscillatory rheology revealed that MBS-iPr gels have appreciable strength and elasticity, in comparison to DBS-iPr gels, regardless of the solvent medium employed. Powder X-ray diffraction was used to probe the arrangement of the gelators in the xerogels they form, and two single crystal X-ray structures of related MBS derivatives give the first precise structural information concerning layering and hydrogen bonding in the monobenzylidene compounds. This kind of layering could explain the apparent self-sorting behaviour of the DBS-MBS-iPr multicomponent gels. The combination of sorbitol-derived gelators reported in this work could find potential applications as multicomponent systems, for example, in soft materials for personal care products, polymer nucleation/clarification, and energy technology.
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Affiliation(s)
- Glenieliz C Dizon
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK. and The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Triumph Road, NG7 2TU, UK
| | - George Atkinson
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK. and The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Triumph Road, NG7 2TU, UK
| | - Stephen P Argent
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK.
| | - Lea T Santu
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK. and The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Triumph Road, NG7 2TU, UK
| | - David B Amabilino
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, UK. and The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, Triumph Road, NG7 2TU, UK
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23
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Nunes SC, Saraiva SM, Pereira RFP, Silva MM, Carlos LD, Almeida P, Gonçalves MC, Ferreira RAS, Bermudez VDZ. Luminescent κ-Carrageenan-Based Electrolytes Containing Neodymium Triflate. Molecules 2019; 24:E1020. [PMID: 30875749 PMCID: PMC6471547 DOI: 10.3390/molecules24061020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 11/16/2022] Open
Abstract
In recent years, the synthesis of polymer electrolyte systems derived from biopolymers for the development of sustainable green electrochemical devices has attracted great attention. Here electrolytes based on the red seaweeds-derived polysaccharide κ-carrageenan (κ-Cg) doped with neodymium triflate (NdTrif₃) and glycerol (Gly) were obtained by means of a simple, clean, fast, and low-cost procedure. The aim was to produce near-infrared (NIR)-emitting materials with improved thermal and mechanical properties, and enhanced ionic conductivity. Cg has a particular interest, due to the fact that it is a renewable, cost-effective natural polymer and has the ability of gelling in the presence of certain alkali- and alkaline-earth metal cations, being good candidates as host matrices for accommodating guest cations. The as-synthesised κ-Cg-based membranes are semi-crystalline, reveal essentially a homogeneous texture, and exhibit ionic conductivity values 1⁻2 orders of magnitude higher than those of the κ-Cg matrix. A maximum ionic conductivity was achieved for 50 wt.% Gly/κ-Cg and 20 wt.% NdTrif₃/κ-Cg (1.03 × 10-4, 3.03 × 10-4, and 1.69 × 10-4 S cm-1 at 30, 60, and 97 °C, respectively). The NdTrif-based κ-Cg membranes are multi-wavelength emitters from the ultraviolet (UV)/visible to the NIR regions, due to the κ-Cg intrinsic emission and to Nd3+, ⁴F3/2→⁴I11/2-9/2.
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Affiliation(s)
- S C Nunes
- Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
- Chemistry Department, University of Beira Interior, 6201-001 Covilhã, Portugal.
| | - S M Saraiva
- Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
| | - R F P Pereira
- Chemistry Department, University of Minho, 4710-057 Braga, Portugal.
| | - M M Silva
- Chemistry Department, University of Minho, 4710-057 Braga, Portugal.
| | - L D Carlos
- Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - P Almeida
- Chemistry Department, University of Beira Interior, 6201-001 Covilhã, Portugal.
- CICS-UBI, University of Beira Interior, 6201-001 Covilhã, Portugal.
| | - M C Gonçalves
- Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
- CQ-VR, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
| | - R A S Ferreira
- Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal.
| | - V de Zea Bermudez
- Chemistry Department, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
- CQ-VR, University of Trás-os-Montes e Alto Douro, 5001-801 Vila Real, Portugal.
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Russo M, Warren H, Spinks GM, MacFarlane DR, Pringle JM. Hydrogels Containing the Ferri/Ferrocyanide Redox Couple and Ionic Liquids for Thermocells. Aust J Chem 2019. [DOI: 10.1071/ch18395] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Thermoelectrochemical cells are a promising new technology for harvesting low-grade waste heat. The operation of these cells relies on a redox couple within an electrolyte, which is most commonly water-based, and improvement of these materials is a key aspect of the advancement of this technology. Here, we report the gelation of aqueous electrolytes containing the K3Fe(CN)6/K4Fe(CN)6 redox couple using a range of different polymers, including polyvinyl alcohol (PVA), sodium carboxymethyl cellulose (Cmc), polyacrylamide (PAAm), and two commercial polyurethane-based polymers: HydroMed D640 and HydroSlip C. These polymers produce quasi-solid-state electrolytes with sufficient mechanical properties to prevent leakage, and allow improved device flexibility and safety. Furthermore, the incorporation of various ionic liquids within the optimized hydrogel network is investigated as a route to enhance the electrochemical and mechanical properties and thermal energy harvesting performance of the hydrogels.
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25
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Ganesan AR, Munisamy S, Bhat R. Effect of potassium hydroxide on rheological and thermo-mechanical properties of semi-refined carrageenan (SRC) films. FOOD BIOSCI 2018. [DOI: 10.1016/j.fbio.2018.10.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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26
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Choudhury S, Ray SK. Efficient removal of cationic dye mixtures from water using a bio-composite adsorbent optimized with response surface methodology. Carbohydr Polym 2018; 200:305-320. [DOI: 10.1016/j.carbpol.2018.07.080] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 07/26/2018] [Accepted: 07/27/2018] [Indexed: 01/31/2023]
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27
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Farias S, Boateng JS. Development and functional characterization of composite freeze dried wafers for potential delivery of low dose aspirin for elderly people with dysphagia. Int J Pharm 2018; 553:65-83. [PMID: 30312748 DOI: 10.1016/j.ijpharm.2018.10.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 07/22/2018] [Accepted: 10/08/2018] [Indexed: 12/20/2022]
Abstract
The impact of demographic ageing is likely to be of major significance in the coming decades due to low birth rates and higher life expectancy. Older people generally require more prescribed medicines due to the presence of multiple conditions such as dysphagia which can make swallowing medicines challenging. This study involves the development, characterization and optimization of composite wafers for potential oral and buccal delivery of low dose aspirin to prevent thrombosis in elderly patients with dysphagia. Blank (BLK) wafers (no loaded drug) were initially formulated by dissolving combinations of metolose (MET) with carrageenan (CAR) and MET with low molecular weight chitosan (CS) in different weight ratios in water, to identify optimum polymer combinations. However, drug loaded (DL) wafers were prepared using 45% v/v ethanol to help complete solubilization of the aspirin. The formulations were characterized using texture analyzer (hardness, mucoadhesion), scanning electron microscopy (SEM), X-ray diffractometry (XRD), attenuated total reflectance - Fourier transform infrared (ATR-FTIR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), and swelling capacity. Wafers with higher total polymer concentration were more resistant to penetration (MET:CAR 1:1 samples B2, C2) and MET:CS 1:1 (sample E2) and MET:CS 3:1 (sample F2) and also depended on the ratios between the polymers used. From the characterization, samples C2, B2, E2 and F2 showed the most ideal characteristics. XRD showed that BLK wafers were amorphous, whilst the DL wafers were crystalline due to the presence of aspirin. SEM confirmed the presence of pores within the polymer matrix of the BLK wafers, whilst DL wafers showed a more compact polymeric matrix with aspirin dispersed over the surface. The DL wafers showed a good flexibility required for transportation and patient handling and showed higher swelling capacity and adhesion values with phosphate buffer saline (PBS) than with simulated saliva (SS). Drug dissolution studies showed that aspirin was rapidly released in the first 20 min and then continuously over 1 h. FTIR confirmed the interaction of aspirin with the polymers evidenced by peak shifts around 1750 cm-1 and the broad peak between 2500 and 3300 cm-1. Lyophilized CAR: CS 1:3 (sample DL13), MET:CS 1:3 (sample DL8) and MET:CAR 3:1 (sample DL1) wafers seem to be a very promising system for the administration of low dose aspirin for older patients with dysphagia.
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Affiliation(s)
- Smirna Farias
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich at Medway, Chatham Maritime, Kent ME4 4TB, UK
| | - Joshua S Boateng
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich at Medway, Chatham Maritime, Kent ME4 4TB, UK.
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Biopolymer-Based Composite Materials Prepared Using Ionic Liquids. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2018; 168:133-176. [PMID: 30242432 DOI: 10.1007/10_2018_78] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Biopolymer-based composite materials have many potential applications in biomedical, pharmaceutical, environmental, biocatalytic, and bioelectronic fields, owing to their inherent biocompatibility and biodegradability. When used as solvents, ionic liquids can be used to fabricate biopolymers such as polysaccharides and proteins into various forms, including molded shapes, films, fibers, and beads. This article summarizes the processes for preparing biopolymer-based composite materials using ionic liquids. The processes include biopolymer dissolution using ionic liquids, regeneration of the biopolymer by an anti-solvent, formation of shapes, and drying of the regenerated biopolymer. In particular, the preparation and applications of biopolymer blend-based composite materials containing two or more biopolymers are addressed.
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Akiyode O, Boateng J. Composite Biopolymer-Based Wafer Dressings Loaded with Microbial Biosurfactants for Potential Application in Chronic Wounds. Polymers (Basel) 2018; 10:E918. [PMID: 30960843 PMCID: PMC6403717 DOI: 10.3390/polym10080918] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Revised: 08/03/2018] [Accepted: 08/13/2018] [Indexed: 11/24/2022] Open
Abstract
In this study two bioactive polysaccharide polymers kappa-carrageenan (CARR) and sodium alginate (SA) incorporated with microbial biosurfactants (BSs) were formulated as medicated wafer dressings for potential application in chronic wounds. Wafers were loaded with BSs at concentrations of 0.1% and 0.2% rhamnolipids (RL) and 0.1% and 5% sophorolipids (SL) and were functionally characterized using scanning electron microscopy (SEM), texture analysis (mechanical strength and in vitro wound adhesion), attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, X-ray diffraction (XRD) and exudate handling properties (pore analysis, swelling index, water absorption (Aw), equilibrium water content (EWC), evaporative water loss (EWL) and water vapor transmission rate (WVTR). The wafers were tactile and ductile in appearance with a hardness range of 2.7⁻4.1 N and can withstand normal stresses but are also flexible to prevent damage to newly formed skin tissues. Wafers were porous (SEM) with pore sizes ranging from 78.8 to 141 µm, and BSs were not visible on the wafer surface or pore walls. The BSs enhanced the porosity of the wafers with values above 98%, while the Aw and EWC ranged from 2699⁻3569% and 96.58⁻98.00%, respectively. The EWL ranged from 85 to 86% after 24 h while the WVTR ranged from 2702⁻3080 g/m² day-1. The compatibility of BSs within the CARR-SA matrix was confirmed by seven characteristic functional groups which were consistently transmitted in the ATR-FTIR spectra. These novel medicated dressing prototypes can potentially help to achieve more rapid wound healing.
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Affiliation(s)
- Olufunke Akiyode
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Kent ME4 4TB, UK.
| | - Joshua Boateng
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich, Kent ME4 4TB, UK.
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30
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Synthesis and characterization of bio-polymer electrolyte based on iota-carrageenan with ammonium thiocyanate and its applications. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-4028-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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31
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Cellulose/carrageenan/TiO2 nanocomposite for adsorption and photodegradation of cationic dye. BIOTECHNOL BIOPROC E 2018. [DOI: 10.1007/s12257-017-0267-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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Gereniu CRN, Saravana PS, Chun BS. Recovery of carrageenan from Solomon Islands red seaweed using ionic liquid-assisted subcritical water extraction. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.06.055] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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33
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Azam RSM, Zhang M, Bhandari B, Yang C. Effect of Different Gums on Features of 3D Printed Object Based on Vitamin-D Enriched Orange Concentrate. FOOD BIOPHYS 2018. [DOI: 10.1007/s11483-018-9531-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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34
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Xanthan and κ-carrageenan based alkaline hydrogels as electrolytes for Al/air batteries. Carbohydr Polym 2017; 157:122-127. [DOI: 10.1016/j.carbpol.2016.09.076] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 09/07/2016] [Accepted: 09/24/2016] [Indexed: 11/17/2022]
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35
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Zhang B, Sudre G, Quintard G, Serghei A, David L, Bernard J, Fleury E, Charlot A. Guar gum as biosourced building block to generate highly conductive and elastic ionogels with poly(ionic liquid) and ionic liquid. Carbohydr Polym 2017; 157:586-595. [DOI: 10.1016/j.carbpol.2016.10.050] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/14/2016] [Accepted: 10/15/2016] [Indexed: 12/28/2022]
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36
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Das AK, Sharma M, Mondal D, Prasad K. Deep eutectic solvents as efficient solvent system for the extraction of κ-carrageenan from Kappaphycus alvarezii. Carbohydr Polym 2015; 136:930-5. [PMID: 26572431 DOI: 10.1016/j.carbpol.2015.09.114] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 09/29/2015] [Accepted: 09/30/2015] [Indexed: 11/28/2022]
Abstract
Three different deep eutectic solvents (DESs) prepared by the complexation of choline chloride with urea, ethylene glycol and glycerol along with their hydrated counterparts were used for the selective extraction of κ-carrageenan from Kappaphycus alvarezii. Upon comparison of the quality of the polysaccharide with the one obtained using water as extraction media as well as the one extracted using widely practiced conventional method, it was found that, the physicochemical as well as rheological properties of κ-carrageenan obtained using DESs as solvents was at par to the one obtained using conventional method and was superior in quality when compared to κ-carrageenan obtained using water as solvent. Considering the tedious nature of the extraction method employed in conventional extraction process, the DESs can be considered as suitable alternative solvents for the facile extraction of the polysaccharide directly from the seaweed. However, among the hydrated and non-hydrated DESs, the hydrated ones were found to be more effective in comparison to their non-hydrated counterparts.
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Affiliation(s)
- Arun Kumar Das
- Analytical Division and Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar 364 002, India
| | - Mukesh Sharma
- Marine Biotechnology & Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar 364 002, India; Academy of Scientific and Innovative Research (AcSIR), Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364 002, India
| | - Dibyendu Mondal
- Marine Biotechnology & Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar 364 002, India; Academy of Scientific and Innovative Research (AcSIR), Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364 002, India
| | - Kamalesh Prasad
- Marine Biotechnology & Ecology Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), G. B. Marg, Bhavnagar 364 002, India; Academy of Scientific and Innovative Research (AcSIR), Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar 364 002, India.
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Takada A, Kadokawa JI. Fabrication and characterization of polysaccharide ion gels with ionic liquids and their further conversion into value-added sustainable materials. Biomolecules 2015; 5:244-62. [PMID: 25793912 PMCID: PMC4384121 DOI: 10.3390/biom5010244] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Accepted: 03/10/2015] [Indexed: 12/22/2022] Open
Abstract
A review of the fabrication of polysaccharide ion gels with ionic liquids is presented. From various polysaccharides, the corresponding ion gels were fabricated through the dissolution with ionic liquids. As ionic liquids, in the most cases, 1-butyl-3-methylimidazolium chloride has been used, whereas 1-allyl-3methylimidazolium acetate was specifically used for chitin. The resulting ion gels have been characterized by suitable analytical measurements. Characterization of a pregel state by viscoelastic measurement provided the molecular weight information. Furthermore, the polysaccharide ion gels have been converted into value-added sustainable materials by appropriate procedures, such as exchange with other disperse media and regeneration.
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Affiliation(s)
- Akihiko Takada
- Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga Koen 6-1, Kasuga, Fukuoka 816-8581, Japan.
| | - Jun-ichi Kadokawa
- Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima 890-0065, Japan.
- Research Center for Environmentally Friendly Materials Engineering, Muroran Institute of Technology, 27-1 Mizumoto-cho, Muroran, Hokkaido 050-8585, Japan.
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Sharma M, Mondal D, Singh N, Trivedi N, Bhatt J, Prasad K. High concentration DNA solubility in bio-ionic liquids with long-lasting chemical and structural stability at room temperature. RSC Adv 2015. [DOI: 10.1039/c5ra03512k] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
DNA (Salmon testes) was solubilized in a biocompatible ionic liquid at up to 8 wt% with long term (one year) structural and chemical stability upon storage at room temperature.
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Affiliation(s)
- Mukesh Sharma
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
| | - Dibyendu Mondal
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
| | - Nripat Singh
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
| | - Nitin Trivedi
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
| | - Jitkumar Bhatt
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
| | - Kamalesh Prasad
- Marine Biotechnology and Ecology Division
- CSIR-Central Salt & Marine Chemicals Research Institute
- Bhavnagar-364002
- India
- AcSIR-Central Salt & Marine Chemicals Research Institute
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Li M, Li J, Na H, Vlassak JJ. Mechanical behavior of poly(methyl methacrylate)-based ionogels. SOFT MATTER 2014; 10:7993-8000. [PMID: 25157559 DOI: 10.1039/c4sm01466a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ionogels are formed when a cross-linked polymer network absorbs an ionic liquid. Ionogels are ionic conductors and, as such, are being considered for use in stretchable electronics and artificial muscles or nerves. The use of ionogels in these applications is limited in part by their mechanical behavior. Here we present an ionogel prepared by swelling covalently cross-linked poly(methyl methacrylate) in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide. The resulting ionogel is compliant, stretchable, and relatively tough. We demonstrate that the swelling ratio, elastic modulus, stretchability, and fracture energy of the ionogel depend sensitively on the cross-link density of the polymer network. The behavior of the ionogel is well captured by the model of the ideal elastomeric gel combined with the Flory-Huggins model for the energy of mixing.
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Affiliation(s)
- Mingyu Li
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
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Development and characterization of carrageenan/grapefruit seed extract composite films for active packaging. Int J Biol Macromol 2014; 68:258-66. [PMID: 24832986 DOI: 10.1016/j.ijbiomac.2014.05.011] [Citation(s) in RCA: 102] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 04/23/2014] [Accepted: 05/05/2014] [Indexed: 01/07/2023]
Abstract
Carrageenan-based antimicrobial films were developed by incorporation of grape fruit seed extract (GSE) at different concentration into the polymer using a solvent casing method and their physical, mechanical, and antimicrobial properties were examined. The carrageenan/GSE composite films appeared yellowish tint due to the polyphenolic compounds in the GSE. SEM analysis showed rough surface with sponge like structures on the cross section of the films. FT-IR results indicated at GSE had good compatibility with carrageenan. The amorphous structure of polymer films was not changed by the incorporation of GSE. But, the addition of GSE increased moisture content, water vapor permeability, and surface hydrophilicity of the films. The tensile strength and elastic modulus decreased with increasing content of GSE, however, the elongation at break increased significantly up to 6.6μg/mL of GSE then decreased thereafter. Thermal stability of the films was not influenced by GSE incorporation. The carrageenan/GSE composite films exhibited great antibacterial activity against food borne pathogens. These results suggest that the carrageenan-based composite films have a high potential for being used as an antimicrobial or active food packaging applications.
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Pawar HV, Boateng JS, Ayensu I, Tetteh J. Multifunctional medicated lyophilised wafer dressing for effective chronic wound healing. J Pharm Sci 2014; 103:1720-33. [PMID: 24700434 DOI: 10.1002/jps.23968] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 03/07/2014] [Accepted: 03/17/2014] [Indexed: 11/10/2022]
Abstract
Wafers combining weight ratios of Polyox with carrageenan (75/25) or sodium alginate (50/50) containing streptomycin and diclofenac were prepared to improve chronic wound healing. Gels were freeze-dried using a lyophilisation cycle incorporating an annealing step. Wafers were characterised for morphology, mechanical and in vitro functional (swelling, adhesion, drug release in the presence of simulated wound fluid) characteristics. Both blank (BLK) and drug-loaded (DL) wafers were soft, flexible, elegant in appearance and non-brittle in nature. Annealing helped to improve porous nature of wafers but was affected by the addition of drugs. Mechanical characterisation demonstrated that the wafers were strong enough to withstand normal stresses but also flexible to prevent damage to newly formed skin tissue. Differences in swelling, adhesion and drug release characteristics could be attributed to differences in pore size and sodium sulphate formed because of the salt forms of the two drugs. BLK wafers showed relatively higher swelling and adhesion than DL wafers with the latter showing controlled release of streptomycin and diclofenac. The optimised dressing has the potential to reduce bacterial infection and can also help to reduce swelling and pain associated with injury due to the anti-inflammatory action of diclofenac and help to achieve more rapid wound healing.
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Affiliation(s)
- Harshavardhan V Pawar
- Department of Pharmaceutical, Chemical & Environmental Sciences, Faculty of Engineering and Science, University of Greenwich at Medway Central Avenue, Chatham Maritime, ME4 4TB, Kent, UK
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Bajpai SK, Daheriya P. Kappa-Carrageenan/PVA Filmswith Antibacterial Properties: Part 1. Optimization of Preparation Conditions and Preliminary Drug Release Studies. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.882687] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Verger L, Corre S, Poirot R, Quintard G, Fleury E, Charlot A. Dual guar/ionic liquid gels and biohybrid material thereof: Rheological investigation. Carbohydr Polym 2014; 102:932-40. [DOI: 10.1016/j.carbpol.2013.10.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2013] [Revised: 09/25/2013] [Accepted: 10/12/2013] [Indexed: 11/29/2022]
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Preparation of tamarind gum based soft ion gels having thixotropic properties. Carbohydr Polym 2014; 102:467-71. [DOI: 10.1016/j.carbpol.2013.11.063] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Revised: 11/19/2013] [Accepted: 11/27/2013] [Indexed: 11/24/2022]
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Self-healing guar gum and guar gum-multiwalled carbon nanotubes nanocomposite gels prepared in an ionic liquid. Carbohydr Polym 2013; 98:1025-30. [DOI: 10.1016/j.carbpol.2013.06.074] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 06/25/2013] [Accepted: 06/28/2013] [Indexed: 11/20/2022]
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Three-dimensional supermacroporous carrageenan-gelatin cryogel matrix for tissue engineering applications. BIOMED RESEARCH INTERNATIONAL 2013; 2013:478279. [PMID: 23936806 PMCID: PMC3722888 DOI: 10.1155/2013/478279] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2013] [Revised: 06/11/2013] [Accepted: 06/12/2013] [Indexed: 11/23/2022]
Abstract
A tissue-engineered polymeric scaffold should provide suitable macroporous structure similar to that of extracellular matrix which can induce cellular activities and guide tissue regeneration. Cryogelation is a technique in which appropriate monomers or polymeric precursors frozen at sub-zero temperature leads to the formation of supermacroporous cryogel matrices. In this study carrageenan-gelatin (natural polymers) cryogels were synthesized by using glutaraldehyde and 1-ethyl-3-[3-dimethylaminopropyl] carbodiimide hydrochloride and N-hydroxysuccinimide (EDC-NHS) as crosslinking agent at optimum concentrations. Matrices showed large and interconnected pores which were in the range of 60–100 μm diameter. Unconfined compression analysis showed elasticity and physical integrity of all cryogels, as these matrices regained their original length after 90% compressing from the original size. Moreover Young's modulus was found to be in the range of 4–11 kPa for the dry cryogel sections. These cryogels also exhibited good in vitro degradation capacity at 37 °C within 4 weeks of incubation. Supermacroporous carrageenan-gelatin cryogels showed efficient cell adherence and proliferation of Cos-7 cells which was examined by SEM. PI nuclear stain was used to observe cell-matrix interaction. Cytotoxicity of the scaffolds was checked by MTT assay which showed that cryogels are biocompatible and act as a potential material for tissue engineering and regenerative medicine.
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Mukesh C, Mondal D, Sharma M, Prasad K. Rapid dissolution of DNA in a novel bio-based ionic liquid with long-term structural and chemical stability: successful recycling of the ionic liquid for reuse in the process. Chem Commun (Camb) 2013; 49:6849-51. [PMID: 23770800 DOI: 10.1039/c3cc42829j] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
DNA from salmon testes was solubilised in two bio-based ionic liquids up to 3.5% w/w in 6 h. No structural degradation of the molecule was observed for the sample solubilised in choline-indole-3-acetate (chol-IAA). However, the molecule was found to be denatured in choline-indole-3-butyrate (chol-IBA). The structural and chemical stability of the DNA molecules after six months of storage in the former was established. Further recyclability of the ionic liquid with very high yield (90-95%) for consecutive reuse in the redissolution of DNA was demonstrated.
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Affiliation(s)
- Chandrakant Mukesh
- AcSIR-Central Salt & Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364002, Gujarat, India
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Sharma M, Mondal D, Mukesh C, Prasad K. Solvent responsive healing of guar gum and guar gum–multiwalled carbon nanotube nanocomposite gels prepared in an ionic liquid. RSC Adv 2013. [DOI: 10.1039/c3ra42454e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Mondal D, Sharma M, Mukesh C, Gupta V, Prasad K. Improved solubility of DNA in recyclable and reusable bio-based deep eutectic solvents with long-term structural and chemical stability. Chem Commun (Camb) 2013; 49:9606-8. [DOI: 10.1039/c3cc45849k] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Boateng JS, Pawar HV, Tetteh J. Polyox and carrageenan based composite film dressing containing anti-microbial and anti-inflammatory drugs for effective wound healing. Int J Pharm 2012; 441:181-91. [PMID: 23228898 DOI: 10.1016/j.ijpharm.2012.11.045] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2012] [Revised: 11/28/2012] [Accepted: 11/29/2012] [Indexed: 10/27/2022]
Abstract
Polyethylene oxide (Polyox) and carrageenan based solvent cast films have been formulated as dressings for drug delivery to wounds. Films plasticised with glycerol were loaded with streptomycin (30%, w/w) and diclofenac (10%, w/w) for enhanced healing effects in chronic wounds. Blank and drug loaded films were characterised by texture analysis (for mechanical and mucoadhesive properties), scanning electron microscopy, differential scanning calorimetry, X-ray diffraction and Fourier transform infrared spectroscopy. In addition, swelling, in vitro drug release and antibacterial studies were conducted to further characterise the films. Both blank and drug loaded films showed a smooth, homogeneous surface morphology, excellent transparency, high elasticity and acceptable tensile (mechanical) properties. The drug loaded films showed a high capacity to absorb simulated wound fluid and significant mucoadhesion force which is expected to allow effective adherence to and protection of the wound. The films showed controlled release of both streptomycin and diclofenac for 72 h. These drug loaded films produced higher zones of inhibition against Staphylococcus aureus, Pseudomonas aeruginosa and Escherichia coli compared to the individual drugs zones of inhibition. Incorporation of streptomycin can prevent and treat chronic wound infections whereas diclofenac can target the inflammatory phase of wound healing to relieve pain and swelling.
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Affiliation(s)
- Joshua S Boateng
- Department of Pharmaceutical, Chemical & Environmental Sciences, School of Science, University of Greenwich at Medway, Central Avenue, Chatham Maritime, ME4 4TB, Kent, UK.
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