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Liu Y, Hu J, Xiao Z, Jin X, Jiang C, Yin P, Tang L, Sun T. Dynamic behavior of tough polyelectrolyte complex hydrogels from chitosan and sodium hyaluronate. Carbohydr Polym 2022; 288:119403. [DOI: 10.1016/j.carbpol.2022.119403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/15/2022] [Accepted: 03/20/2022] [Indexed: 11/02/2022]
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2
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Yilmaz-Bayraktar S, Foremny K, Kreienmeyer M, Warnecke A, Doll T. Medical-Grade Silicone Rubber-Hydrogel-Composites for Modiolar Hugging Cochlear Implants. Polymers (Basel) 2022; 14:polym14091766. [PMID: 35566935 PMCID: PMC9103165 DOI: 10.3390/polym14091766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 02/04/2023] Open
Abstract
The gold standard for the partial restoration of sensorineural hearing loss is cochlear implant surgery, which restores patients’ speech comprehension. The remaining limitations, e.g., music perception, are partly due to a gap between cochlear implant electrodes and the auditory nerve cells in the modiolus of the inner ear. Reducing this gap will most likely lead to improved cochlear implant performance. To achieve this, a bending or curling mechanism in the electrode array is discussed. We propose a silicone rubber–hydrogel actuator where the hydrogel forms a percolating network in the dorsal silicone rubber compartment of the electrode array to exert bending forces at low volume swelling ratios. A material study of suitable polymers (medical-grade PDMS and hydrogels), including parametrized bending curvature measurements, is presented. The curvature radii measured meet the anatomical needs for positioning electrodes very closely to the modiolus. Besides stage-one biocompatibility according to ISO 10993-5, we also developed and validated a simplified mathematical model for designing hydrogel-actuated CI with modiolar hugging functionality.
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Affiliation(s)
- Suheda Yilmaz-Bayraktar
- Department of Otolaryngology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany; (K.F.); (M.K.); (A.W.); (T.D.)
- Cluster of Excellence Hearing4All, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
- Correspondence:
| | - Katharina Foremny
- Department of Otolaryngology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany; (K.F.); (M.K.); (A.W.); (T.D.)
- Cluster of Excellence Hearing4All, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - Michaela Kreienmeyer
- Department of Otolaryngology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany; (K.F.); (M.K.); (A.W.); (T.D.)
- Cluster of Excellence Hearing4All, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - Athanasia Warnecke
- Department of Otolaryngology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany; (K.F.); (M.K.); (A.W.); (T.D.)
- Cluster of Excellence Hearing4All, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
| | - Theodor Doll
- Department of Otolaryngology, Hannover Medical School, Carl-Neuberg-Straße 1, 30625 Hannover, Germany; (K.F.); (M.K.); (A.W.); (T.D.)
- Cluster of Excellence Hearing4All, Carl-Neuberg-Straße 1, 30625 Hannover, Germany
- Fraunhofer Institute for Toxicology and Experimental Medicine (ITEM), Nikolai-Fuchs-Straße 1, 30625 Hannover, Germany
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3
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Abune L, Davis B, Wang Y. Aptamer-functionalized hydrogels: An emerging class of biomaterials for protein delivery, cell capture, regenerative medicine, and molecular biosensing. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2021; 13:e1731. [PMID: 34132055 DOI: 10.1002/wnan.1731] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/27/2021] [Accepted: 05/24/2021] [Indexed: 12/25/2022]
Abstract
Molecular recognition is essential to the development of biomaterials. Aptamers are a unique class of synthetic ligands interacting with not only their target molecules with high affinities and specificities but also their complementary sequences with high fidelity. Thus, aptamers have recently attracted significant attention in the development of an emerging class of biomaterials, that is, aptamer-functionalized hydrogels. In this review, we introduce the methods of incorporating aptamers into hydrogels as pendant motifs or crosslinkers. We further introduce the functions of these hydrogels in recognizing proteins, cells, and analytes through four applications including protein delivery, cell capture, regenerative medicine, and molecular biosensing. Notably, as aptamer-functionalized hydrogels have the characteristics of both aptamers and hydrogels, their potential applications are broad and beyond the scope of this review. This article is categorized under: Biology-Inspired Nanomaterials > Nucleic Acid-Based Structures Implantable Materials and Surgical Technologies > Nanomaterials and Implants Therapeutic Approaches and Drug Discovery > Emerging Technologies.
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Affiliation(s)
- Lidya Abune
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Brandon Davis
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - Yong Wang
- Department of Biomedical Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA
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Gu J, Zhang R, Zhang L, Lin J. Epitaxial Assembly of Nanoparticles in a Diblock Copolymer Matrix: Precise Organization of Individual Nanoparticles into Regular Arrays. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jiabin Gu
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Runrong Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Liangshun Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jiaping Lin
- Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China
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Jangizehi A, Schmid F, Besenius P, Kremer K, Seiffert S. Defects and defect engineering in Soft Matter. SOFT MATTER 2020; 16:10809-10859. [PMID: 33306078 DOI: 10.1039/d0sm01371d] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Soft matter covers a wide range of materials based on linear or branched polymers, gels and rubbers, amphiphilic (macro)molecules, colloids, and self-assembled structures. These materials have applications in various industries, all highly important for our daily life, and they control all biological functions; therefore, controlling and tailoring their properties is crucial. One way to approach this target is defect engineering, which aims to control defects in the material's structure, and/or to purposely add defects into it to trigger specific functions. While this approach has been a striking success story in crystalline inorganic hard matter, both for mechanical and electronic properties, and has also been applied to organic hard materials, defect engineering is rarely used in soft matter design. In this review, we present a survey on investigations on defects and/or defect engineering in nine classes of soft matter composed of liquid crystals, colloids, linear polymers with moderate degree of branching, hyperbranched polymers and dendrimers, conjugated polymers, polymeric networks, self-assembled amphiphiles and proteins, block copolymers and supramolecular polymers. This overview proposes a promising role of this approach for tuning the properties of soft matter.
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Affiliation(s)
- Amir Jangizehi
- Johannes Gutenberg University Mainz, Department of Chemistry, Duesbergweg 10-14, D-55128 Mainz, Germany
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6
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Vedhanayagam M, Anandasadagopan S, Nair BU, Sreeram KJ. Polymethyl methacrylate (PMMA) grafted collagen scaffold reinforced by PdO–TiO2 nanocomposites. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110378. [DOI: 10.1016/j.msec.2019.110378] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 10/24/2019] [Accepted: 10/29/2019] [Indexed: 01/27/2023]
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Lewandowska-Łańcucka J, Gilarska A, Buła A, Horak W, Łatkiewicz A, Nowakowska M. Genipin crosslinked bioactive collagen/chitosan/hyaluronic acid injectable hydrogels structurally amended via covalent attachment of surface-modified silica particles. Int J Biol Macromol 2019; 136:1196-1208. [PMID: 31252014 DOI: 10.1016/j.ijbiomac.2019.06.184] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 06/13/2019] [Accepted: 06/24/2019] [Indexed: 12/19/2022]
Abstract
Collagen, chitosan and hyaluronic acid based multicomponent injectable and in situ gellating biomimetic hybrid materials for bone tissue engineering applications were prepared in one-step procedure. The bioactive phase in the form of surface-modified silica particles was introduced to the solutions of biopolymers and simultaneously crosslinked with genipin both the biopolymer matrix and dispersed particles at 37 °C. The novel approach presented here involved the use of silica particles which surfaces were priory functionalized with amino groups. That modification makes possible the covalent attachment of silica particles to the polymeric hydrogel network on crosslinking with genipin. That methodology is especially important as it makes possible to obtain the hybrid materials (biopolymer-silica particles) in which the problems related to the potential phase separation of mineral particles, hindering their in vivo application can be eliminated. The hybrids of various compositions were obtained and their physicochemical and biological properties were determined. The in vitro experiments performed under simulated body fluid conditions revealed that the amino-functionalized silica particles covalently attached to the biopolymeric network are still bioactive. Finally, the in vitro cell culture studies shown that the materials developed are biocompatible as they supported MG-63 cells adhesion, proliferation as well as Alkaline phosphatase (ALP) expression.
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Affiliation(s)
| | - Adriana Gilarska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Mickiewicza 30, 30-059 Kraków, Poland
| | - Aleksandra Buła
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland; Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, prof. S. Łojasiewicza 11, 30-348 Kraków, Poland
| | - Wojciech Horak
- AGH University of Science and Technology, Faculty of Mechanical Engineering and Robotics, Department of Machine Design and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Anna Łatkiewicz
- Laboratory of Field Emission Scanning Electron Microscopy and Microanalysis at the Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, 30-387 Kraków, Poland
| | - Maria Nowakowska
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Kraków, Poland
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Alvarez-Ramirez J, Garcia-Diaz S, Vernon-Carter EJ, Bello-Perez LA. A novel, simple, economic and effective method for retarding maize tortilla staling. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:4403-4410. [PMID: 29435988 DOI: 10.1002/jsfa.8962] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 01/07/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Staling of maize tortillas is a major drawback affecting their manufacture, commercialization and consumption. The development of methods that may help retard staling of maize tortillas is an ongoing research topic. In this work, a novel, simple, economic and effective method is proposed, based on adding completely gelatinized nixtamalized maize flour (GMF) dispersion to the basic masa formulation recipe (water, 600 g kg-1 ; nixtamalized maize flour, 400 g kg-1 ) in substitution of 50, 100 and 150 g kg-1 of water. RESULTS Masa added with GMF showed increased water retention capacity, reduced freezable water content and improved flow and dynamic rheological properties and produced tortillas with decreased firmness. The infrared 1047/1022 cm-1 spectral ratio indicated that a more disordered starch granule arrangement was formed, while enthalpy peaks associated with starch retrogradation decreased. All the above indicators were more pronounced the higher was the GMF content. CONCLUSION This work showed that GMF can play the role of a self-hydrocolloid anti-staling agent by retarding the retrogradation of maize starch and deterring the loss of water and rheological properties of masa and the increase in undesirable sensory characteristics of tortilla such as increased firmness. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Jose Alvarez-Ramirez
- Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Ciudad de México, Mexico
| | - Samuel Garcia-Diaz
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Ciudad de México, Mexico
| | - Eduardo Jaime Vernon-Carter
- Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, Ciudad de México, Mexico
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9
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Preparation of poly(N-isopropylacrylamide)/montmorillonite composite hydrogel by frontal polymerization. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4066-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Vedhanayagam M, Nidhin M, Duraipandy N, Naresh ND, Jaganathan G, Ranganathan M, Kiran MS, Narayan S, Nair BU, Sreeram KJ. Role of nanoparticle size in self-assemble processes of collagen for tissue engineering application. Int J Biol Macromol 2017; 99:655-664. [PMID: 28274865 DOI: 10.1016/j.ijbiomac.2017.02.102] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 02/28/2017] [Accepted: 02/28/2017] [Indexed: 11/26/2022]
Abstract
Nanoparticle mediated extracellular matrix may offer new and improved biomaterial to wound healing and tissue engineering applications. However, influence of nanoparticle size in extracellular matrix is still unclear. In this work, we synthesized different size of silver nanoparticles (AgNPs) comprising of 10nm, 35nm and 55nm using nutraceuticals (pectin) as reducing as well as stabilization agents through microwave irradiation method. Synthesized Ag-pectin nanoparticles were assimilated in the self-assemble process of collagen leading to fabricated collagen-Ag-pectin nanoparticle based scaffolds. Physico-chemical properties and biocompatibility of scaffolds were analyzed through FT-IR, SEM, DSC, mechanical strength analyzer, antibacterial activity and MTT assay. Our results suggested that 10nm sized Ag-pectin nanoparticles significantly increased the denaturation temperature (57.83°C) and mechanical strength (0.045MPa) in comparison with native collagen (50.29°C and 0.011MPa). The in vitro biocompatibility assay reveals that, collagen-Ag-pectin nanoparticle based scaffold provided higher antibacterial activity against to Gram positive and Gram negative as well as enhanced cell viability toward keratinocytes. This work opens up a possibility of employing the pectin caged silver nanoparticles to develop collagen-based nanoconstructs for biomedical applications.
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Affiliation(s)
- Mohan Vedhanayagam
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Marimuthu Nidhin
- Department of Chemistry, Amity School of Applied Sciences, Amity University, Gurgaon, India
| | - Natarajan Duraipandy
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Ganesh Jaganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | - Mohan Ranganathan
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
| | | | - Shoba Narayan
- Faculty of Allied Health Sciences, Chettinad Academy of Research & Education, Chennai 603 103, India
| | - Balachandran Unni Nair
- Chemical Laboratory, CSIR-Central Leather Research Institute, Adyar, Chennai 600 020, India
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11
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Chubarova EV, Lebedeva MF, Melenevskaya EY, Shamanin VV. Destructive changes of polymer matrices during preparation, storage, and mechanical testing of neat and C 60-filled polystyrene films. J Appl Polym Sci 2017. [DOI: 10.1002/app.44520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elena V. Chubarova
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Marina F. Lebedeva
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Mechanics of Polymers and Composites; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Elena Yu. Melenevskaya
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
| | - Valerii V. Shamanin
- Russian Academy of Sciences, Institute of Macromolecular Compounds; Laboratory of Polymerization Mechanisms and Polymer Synthesis; 199004 Bolshoi pr. 31 St.-Petersburg Russia
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12
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Alginate- and gelatin-based bioactive photocross-linkable hybrid materials for bone tissue engineering. Carbohydr Polym 2017; 157:1714-1722. [DOI: 10.1016/j.carbpol.2016.11.051] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 11/07/2016] [Accepted: 11/18/2016] [Indexed: 11/23/2022]
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13
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Carrillo-Navas H, Guadarrama-Lezama AY, Vernon-Carter EJ, García-Díaz S, Reyes I, Alvarez-Ramírez J. Effect of gelatinized flour fraction on thermal and rheological properties of wheat-based dough and bread. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2016; 53:3996-4006. [PMID: 28035155 PMCID: PMC5156643 DOI: 10.1007/s13197-016-2399-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/15/2016] [Accepted: 10/28/2016] [Indexed: 10/20/2022]
Abstract
This work considered gelatinized wheat flour fraction with properties similar to hydrocolloid to enhance the strength of dough network by improving water retention and rheological characteristics. The gelatinized (90 °C) fraction of the wheat flour was incorporated in the dough formulation at different levels (5, 10, and 20% w/w). The effects of the gelatinized flour (GF) fraction on the dough rheology and thermal properties were studied. The incorporation of GF induced a moderate increase of dough viscoelasticity and reduced the freezing and melting enthalpies. On the other hand, the changes in bread textural properties brought by incorporation of GF were insignificant, indicating that the gelatinized fraction acted as a binder that enhanced water trapping in the structure. SEM images showed a more heterogeneous crumb microstructure (e.g., gas cells, porous, etc.) bread prepared using GF. Drying kinetics obtained from TGA indicated that the water diffusivity decreased with the incorporation of GF, which suggested that the bread had a compact microstructure.
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Affiliation(s)
- H. Carrillo-Navas
- Facultad de Química, Universidad Autónoma del Estado de México, 50120 Toluca, Mexico
- Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, 09340 Mexico, Mexico
| | | | - E. J. Vernon-Carter
- Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, 09340 Mexico, Mexico
| | - S. García-Díaz
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, 09340 Mexico, Mexico
| | - I. Reyes
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, 09340 Mexico, Mexico
| | - J. Alvarez-Ramírez
- Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, 09340 Mexico, Mexico
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Homaeigohar S, Elbahri M. Nanocomposite Electrospun Nanofiber Membranes for Environmental Remediation. MATERIALS 2014; 7:1017-1045. [PMID: 28788497 PMCID: PMC5453108 DOI: 10.3390/ma7021017] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/14/2014] [Accepted: 01/15/2014] [Indexed: 11/16/2022]
Abstract
Rapid worldwide industrialization and population growth is going to lead to an extensive environmental pollution. Therefore, so many people are currently suffering from the water shortage induced by the respective pollution, as well as poor air quality and a huge fund is wasted in the world each year due to the relevant problems. Environmental remediation necessitates implementation of novel materials and technologies, which are cost and energy efficient. Nanomaterials, with their unique chemical and physical properties, are an optimum solution. Accordingly, there is a strong motivation in seeking nano-based approaches for alleviation of environmental problems in an energy efficient, thereby, inexpensive manner. Thanks to a high porosity and surface area presenting an extraordinary permeability (thereby an energy efficiency) and selectivity, respectively, nanofibrous membranes are a desirable candidate. Their functionality and applicability is even promoted when adopting a nanocomposite strategy. In this case, specific nanofillers, such as metal oxides, carbon nanotubes, precious metals, and smart biological agents, are incorporated either during electrospinning or in the post-processing. Moreover, to meet operational requirements, e.g., to enhance mechanical stability, decrease of pressure drop, etc., nanofibrous membranes are backed by a microfibrous non-woven forming a hybrid membrane. The novel generation of nanocomposite/hybrid nanofibrous membranes can perform extraordinarily well in environmental remediation and control. This reality justifies authoring of this review paper.
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Affiliation(s)
- Shahin Homaeigohar
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Nanochemistry and Nanoengineering, Max-Planck-Str.1, 21502 Geesthacht, Germany.
| | - Mady Elbahri
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Nanochemistry and Nanoengineering, Max-Planck-Str.1, 21502 Geesthacht, Germany.
- Nanochemistry and Nanoengineering, Institute for Materials Science, Faculty of Engineering, Christian-Albrechts-Universität zu Kiel, Kaiserstrasse 2, 24143 Kiel, Germany.
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15
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Alvarez GS, Hélary C, Mebert AM, Wang X, Coradin T, Desimone MF. Antibiotic-loaded silica nanoparticle–collagen composite hydrogels with prolonged antimicrobial activity for wound infection prevention. J Mater Chem B 2014; 2:4660-4670. [DOI: 10.1039/c4tb00327f] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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16
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Homaeigohar SS, Elbahri M. Novel compaction resistant and ductile nanocomposite nanofibrous microfiltration membranes. J Colloid Interface Sci 2012; 372:6-15. [PMID: 22304933 DOI: 10.1016/j.jcis.2012.01.012] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 12/21/2011] [Accepted: 01/09/2012] [Indexed: 10/14/2022]
Abstract
Despite promising filtration abilities, low mechanical properties of extraordinary porous electrospun nanofibrous membranes could be a major challenge in their industrial development. In addition, such kind of membranes are usually hydrophobic and non-wettable. To reinforce an electrospun nanofibrous membrane made of polyethersulfone (PES) mechanically and chemically (to improve wettability), zirconia nanoparticles as a novel nanofiller in membrane technology were added to the nanofibers. The compressive and tensile results obtained through nanoindentation and tensile tests, respectively, implied an optimum mechanical properties after incorporation of zirconia nanoparticles. Especially compaction resistance of the electrospun nanofibrous membranes improved significantly as long as no agglomeration of the nanoparticles occurred and the electrospun nanocomposite membranes showed a higher tensile properties without any brittleness i.e. a high ductility. Noteworthy, for the first time the compaction level was quantified through a nanoindentation test. In addition to obtaining a desired mechanical performance, the hydrophobicity declined. Combination of promising properties of optimum mechanical and surface chemical properties led to a considerably high water permeability also retention efficiency of the nanocomposite PES nanofibrous membranes. Such finding implies a longer life span and lower energy consumption for a water filtration process.
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Affiliation(s)
- Seyed Shahin Homaeigohar
- Helmholtz-Zentrum Geesthacht (HZG), Institute of Polymer Research, Nanochemistry and Nanoengineering Group, Max-Planck-Str. 1, 21502 Geesthacht, Germany
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Muscatello MMW, Stunja LE, Thareja P, Wang L, Bohn JJ, Velankar SS, Asher SA. Dependence of Photonic Crystal Nanocomposite Elasticity on Crystalline Colloidal Array Particle Size. Macromolecules 2009; 42:4403-4406. [PMID: 20160933 PMCID: PMC2764406 DOI: 10.1021/ma900919y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Yanagioka M, Frank CW. Defect generation surrounding nanoparticles in a cross-linked hydrogel network. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:5927-5939. [PMID: 19371046 DOI: 10.1021/la804130m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A detailed understanding of polymer-nanoparticle interactions is a key element in demystifying the reinforcement mechanism for nanocomposites. To decouple the effects of the polymer-nanoparticle interactions from the particle distribution, we utilized polymerized crystalline colloidal arrays based on a thermosensitive hydrogel, poly(N-isopropylacrylamide) (pNIPAAm). First, the hydrogel network structure in the vicinity of the nanoparticles was investigated by the deswelling behavior of particle-filled hydrogels. The addition of nanoparticles led to an increased rate of deswelling when the particle-filled hydrogel was heated beyond the lower critical solution temperature (32 degrees C). To interpret this observation, we have suggested that the polymer network has a significant increase in defects (e.g., dangling chain ends) in the vicinity of the nanoparticles. The apparent percolation threshold associated with the interaction of the nanoparticles was about 20 times smaller than the theoretical percolation threshold of spherical particles. As a consequence, we have determined the thickness of this defect zone to be about 85 nm. This is much larger than the size of the unperturbed linear pNIPAAm chains, suggesting that the polymers that play a role in the adsorption are not constrained segments of polymers bound between cross-link junctions but relatively free chains. This finding enabled us to emulate the adsorption behavior of pNIPAAm hydrogels on the particles by simply adding linear pNIPAAm chains to the particle suspensions. We then prepared silica and polystyrene suspensions with free pNIPAAm chains at a concentration much lower than the overlap concentration c*. A rheological study was conducted to determine the adsorption thickness of linear polymer chains on both silica and polystyrene nanoparticles. No significant adsorption was observed on silica, whereas the resultant thickness of the polymer was 8 nm on polystyrene.
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Affiliation(s)
- Masaki Yanagioka
- Department of Chemical Engineering, Stanford University, Stanford, California 94305-5025, USA
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Yanagioka M, Toney MF, Frank CW. Influence of Interfacial Layer Between Nanoparticles and Polymeric Matrix on Viscoelastic Properties of Hydrogel Nanocomposites. Macromolecules 2009. [DOI: 10.1021/ma802152s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Masaki Yanagioka
- Department of Chemical Engineering, Stanford University, Stanford, California 94305,and Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, California 94025
| | - Michael F. Toney
- Department of Chemical Engineering, Stanford University, Stanford, California 94305,and Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, California 94025
| | - Curtis W. Frank
- Department of Chemical Engineering, Stanford University, Stanford, California 94305,and Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Menlo Park, California 94025
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