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Ahmed J, Gultekinoglu M, Edirisinghe M. Recent developments in the use of centrifugal spinning and pressurized gyration for biomedical applications. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2024; 16:e1916. [PMID: 37553260 DOI: 10.1002/wnan.1916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 06/23/2023] [Accepted: 07/06/2023] [Indexed: 08/10/2023]
Abstract
Centrifugal spinning is a technology used to generate small diameter fibers and has been extensively studied for its vast applications in biomedical engineering. Centrifugal spinning is known for its rapid production rate and has inspired the creation of other technologies which leverage the high-speed rotation, namely Pressurized Gyration. Pressurized gyration incorporates a unique applied gas pressure which serves to provide additional control over the fiber production process. The resulting fibers are uniquely suitable for a range of healthcare-related applications that are thoroughly discussed in this work, which involve scaffolds for tissue engineering, solid dispersions for drug delivery, antimicrobial meshes for filtration and bandage-like fibrous coverings for wound healing. In this review, the notable recent developments in centrifugal spinning and pressurized gyration are presented and how these technologies are being used to further the range of uses of biomaterials engineering, for example the development of core-sheath fabrication techniques for multi-layered fibers and the combination with electrospinning to produce advanced fiber mats. The enormous potential of these technologies and their future advancements highlights how important they are in the biomedical discipline. This article is categorized under: Implantable Materials and Surgical Technologies > Nanotechnology in Tissue Repair and Replacement Nanotechnology Approaches to Biology > Nanoscale Systems in Biology Biology-Inspired Nanomaterials > Lipid-Based Structures.
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Affiliation(s)
- Jubair Ahmed
- Department of Mechanical Engineering, University College London, London, UK
| | - Merve Gultekinoglu
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Hacettepe University, Ankara, Turkey
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London, UK
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Huang R, Dai Y, Ahmed J, Edirisinghe M. Facile One-Step Synthesis of PVDF Bead-on-String Fibers by Pressurized Gyration for Reusable Face Masks. Polymers (Basel) 2022; 14:4498. [PMID: 36365492 PMCID: PMC9654049 DOI: 10.3390/polym14214498] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/12/2022] [Accepted: 10/20/2022] [Indexed: 08/10/2023] Open
Abstract
Single-use face masks pose a threat to the environment and are not cost-effective, which prompts the need for developing reusable masks. In this study, pressurized gyration (PG) successfully produced bead-on-string polyvinylidene fluoride (PVDF) fibers with fiber diameters ranging from 2.3 μm to 26.1 μm, and bead diameters ranging from 60.9 μm to 88.5 μm by changing the solution parameters. The effect of the solution parameters on the crystalline phase was studied by Fourier-transform infrared spectroscopy (FT-IR), where the β-phase contents of PG PVDF fibers reached over 75%. The fiber morphology and β-phase contents of PG PVDF fibers indicated the potential mechanical and electrostatic filtration efficiency of PG PVDF fibers, respectively. Additionally, the hydrophobicity was investigated by static water contact angle tests, and the PVDF fibers showed superior hydrophobicity properties (all samples above 125°) over commercial polypropylene (PP) single-use masks (approximately 107°). This study supports the notion that the PG PVDF fiber mats are a promising candidate for future reusable face masks.
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Affiliation(s)
| | | | | | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
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3
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Graham SP, Cheong YK, Furniss S, Nixon E, Smith JA, Yang X, Fruengel R, Hussain S, Tchorzewska MA, La Ragione RM, Ren G. Antiviral Efficacy of Metal and Metal Oxide Nanoparticles against the Porcine Reproductive and Respiratory Syndrome Virus. NANOMATERIALS 2021; 11:nano11082120. [PMID: 34443950 PMCID: PMC8398903 DOI: 10.3390/nano11082120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 08/15/2021] [Accepted: 08/16/2021] [Indexed: 11/16/2022]
Abstract
Porcine reproductive and respiratory syndrome viruses (PRRSV) are responsible for one of the most economically important diseases affecting the global pig industry. On-farm high-efficiency particulate air (HEPA) filtration systems can effectively reduce airborne transmission of PRRSV and the incidence of PRRS, but they are costly, and their adoption is limited. Therefore, there is a need for low-cost alternatives, such as antimicrobial filters impregnated with antiviral nanoparticles (AVNP). During the past 10 years, tailored intermetallic/multi-elemental AVNP compositions have demonstrated effective performance against human viruses. In this study, a panel of five AVNP was evaluated for viricidal activity against PRRSV. Three AVNP materials: AVNP2, copper nanoparticles (CuNP), and copper oxide nanoparticles (CuONP), were shown to exert a significant reduction (>99.99%) in virus titers at 1.0% (w/v) concentration. Among the three, CuNP was the most effective at lower concentrations. Further experiments revealed that AVNP generated significant reductions in viral titers within just 1.5 min. For an optimal reduction in viral titers, direct contact between viruses and AVNP was required. This was further explained by the inert nature of these AVNP, where only negligible leaching concentrations of Ag/Cu ions (0.06–4.06 ppm) were detected in AVNP supernatants. Real-time dynamic light scatting (DLS) and transmission electron microscopic (TEM) analyses suggested that the mono-dispersive hydrodynamic behavior of AVNPs may have enhanced their antiviral activity against PRRSV. Collectively, these data support the further evaluation of these AVNP as candidate nanoparticles for incorporation into antimicrobial air-filtration systems to reduce transmission of PRRSV and other airborne pathogens.
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Affiliation(s)
- Simon P. Graham
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
- The Pirbright Institute, Woking GU24 0NF, UK
- Correspondence: (S.P.G.); (G.R.); Tel.: +44-(0)1483-231-478 (S.P.G.); +44-(0)7940-767-589 (G.R.)
| | - Yuen-Ki Cheong
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
| | - Summer Furniss
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Emma Nixon
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Joseph A. Smith
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Xiuyi Yang
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
| | - Rieke Fruengel
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Sabha Hussain
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Monika A. Tchorzewska
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Roberto M. La Ragione
- School of Veterinary Medicine, University of Surrey, Guildford GU2 7AL, UK; (S.F.); (E.N.); (J.A.S.); (R.F.); (S.H.); (M.A.T.); (R.M.L.R.)
| | - Guogang Ren
- School of Physics, Engineering and Computer Sciences, University of Hertfordshire, Hatfield AL10 9AB, UK; (Y.-K.C.); (X.Y.)
- Correspondence: (S.P.G.); (G.R.); Tel.: +44-(0)1483-231-478 (S.P.G.); +44-(0)7940-767-589 (G.R.)
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Mehta P, Rasekh M, Patel M, Onaiwu E, Nazari K, Kucuk I, Wilson PB, Arshad MS, Ahmad Z, Chang MW. Recent applications of electrical, centrifugal, and pressurised emerging technologies for fibrous structure engineering in drug delivery, regenerative medicine and theranostics. Adv Drug Deliv Rev 2021; 175:113823. [PMID: 34089777 DOI: 10.1016/j.addr.2021.05.033] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/11/2021] [Accepted: 05/31/2021] [Indexed: 12/16/2022]
Abstract
Advancements in technology and material development in recent years has led to significant breakthroughs in the remit of fiber engineering. Conventional methods such as wet spinning, melt spinning, phase separation and template synthesis have been reported to develop fibrous structures for an array of applications. However, these methods have limitations with respect to processing conditions (e.g. high processing temperatures, shear stresses) and production (e.g. non-continuous fibers). The materials that can be processed using these methods are also limited, deterring their use in practical applications. Producing fibrous structures on a nanometer scale, in sync with the advancements in nanotechnology is another challenge met by these conventional methods. In this review we aim to present a brief overview of conventional methods of fiber fabrication and focus on the emerging fiber engineering techniques namely electrospinning, centrifugal spinning and pressurised gyration. This review will discuss the fundamental principles and factors governing each fabrication method and converge on the applications of the resulting spun fibers; specifically, in the drug delivery remit and in regenerative medicine.
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Affiliation(s)
- Prina Mehta
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - Manoochehr Rasekh
- College of Engineering, Design and Physical Sciences, Brunel University London, Middlesex UB8 3PH, UK
| | - Mohammed Patel
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - Ekhoerose Onaiwu
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - Kazem Nazari
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - I Kucuk
- Institute of Nanotechnology, Gebze Technical University, 41400 Gebze, Turkey
| | - Philippe B Wilson
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Brackenhurst Campus, Southwell NG25 0QF, UK
| | | | - Zeeshan Ahmad
- Leicester School of Pharmacy, De Montfort University, Leicester LE1 9BH, UK
| | - Ming-Wei Chang
- Nanotechnology and Integrated Bioengineering Centre, University of Ulster, Jordanstown Campus, Newtownabbey, Northern Ireland BT37 0QB, UK.
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Exploitation of Antimicrobial Nanoparticles and Their Applications in Biomedical Engineering. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11104520] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Antibiotic resistance is a major threat to public health, which contributes largely to increased mortality rates and costs in hospitals. The severity and widespread nature of antibiotic resistance result in limited treatments to effectively combat antibiotic-resistant pathogens. Nanoparticles have different or enhanced properties in contrast to their bulk material, including antimicrobial efficacy towards a broad range of microorganisms. Their beneficial properties can be utilised in various bioengineering technologies. Thus, antimicrobial nanoparticles may provide an alternative to challenge antibiotic resistance. Currently, nanoparticles have been incorporated into materials, such as fibres, glass and paints. However, more research is required to elucidate the mechanisms of action fully and to advance biomedical applications further. This paper reviews the antimicrobial efficacies and the intrinsic properties of different metallic nanoparticles, their potential mechanisms of action against certain types of harmful pathogens and how these properties may be utilised in biomedical and healthcare products with the aim to reduce cross contaminations, disease transmissions and usage of antibiotics.
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Matharu RK, Tabish TA, Trakoolwilaiwan T, Mansfield J, Moger J, Wu T, Lourenço C, Chen B, Ciric L, Parkin IP, Edirisinghe M. Microstructure and antibacterial efficacy of graphene oxide nanocomposite fibres. J Colloid Interface Sci 2020; 571:239-252. [DOI: 10.1016/j.jcis.2020.03.037] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 03/08/2020] [Accepted: 03/09/2020] [Indexed: 01/10/2023]
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Zhang Y, Zhang X, Song J, Jin L, Wang X, Quan C. Ag/H-ZIF-8 Nanocomposite as an Effective Antibacterial Agent Against Pathogenic Bacteria. NANOMATERIALS 2019; 9:nano9111579. [PMID: 31703378 PMCID: PMC6915408 DOI: 10.3390/nano9111579] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 10/27/2019] [Accepted: 10/29/2019] [Indexed: 01/10/2023]
Abstract
Development of antimicrobial nanomaterials is one of the most attractive strategies for eliminating the major threat of pathogenic bacteria to public health. In this work, we developed a simple impregnation-reduction method for the synthesis of Ag-doped hierarchical ZIF-8 (Ag/H-ZIF-8) nanocomposite. The nanocomposite was characterized by several techniques and its antibacterial activity was investigated. The Ag nanoparticles are uniformly dispersed in the porous ZIF-8 with narrow size distribution. Consequently, the resulting Ag/H-ZIF-8 nanocomposite showed significantly enhanced antibacterial activities compared to the single ZIF-8 or Ag nanoparticles. Furthermore, the composite is biocompatible, because no obvious toxicity was observed on Hepatic epithelial cells. This study offers a new approach for the design of hybrid antimicrobial nanomaterials that have great potentials in practical disinfections.
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Affiliation(s)
- Yanmei Zhang
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
- Correspondence: (Y.Z.); (C.Q.)
| | - Xin Zhang
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
| | - Jie Song
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
| | - Liming Jin
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
| | - Xiaotong Wang
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
| | - Chunshan Quan
- College of Life Science, Dalian Minzu University, Economical and Technological Development Zone, Dalian 116600, China; (X.Z.); (X.W.); (J.S.); (L.J.)
- Key Laboratory of Biotechnology and Bioresources Utilization, Dalian Minzu University, Ministry of Education, Dalian 116600, China
- Correspondence: (Y.Z.); (C.Q.)
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8
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Liao C, Li Y, Tjong SC. Antibacterial Activities of Aliphatic Polyester Nanocomposites with Silver Nanoparticles and/or Graphene Oxide Sheets. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1102. [PMID: 31374855 PMCID: PMC6724040 DOI: 10.3390/nano9081102] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/21/2019] [Accepted: 07/25/2019] [Indexed: 12/18/2022]
Abstract
Aliphatic polyesters such as poly(lactic acid) (PLA), polycaprolactone (PCL) and poly(lactic-co-glycolic) acid (PLGA) copolymers have been widely used as biomaterials for tissue engineering applications including: bone fixation devices, bone scaffolds, and wound dressings in orthopedics. However, biodegradable aliphatic polyesters are prone to bacterial infections due to the lack of antibacterial moieties in their macromolecular chains. In this respect, silver nanoparticles (AgNPs), graphene oxide (GO) sheets and AgNPs-GO hybrids can be used as reinforcing nanofillers for aliphatic polyesters in forming antimicrobial nanocomposites. However, polymeric matrix materials immobilize nanofillers to a large extent so that they cannot penetrate bacterial membrane into cytoplasm as in the case of colloidal nanoparticles or nanosheets. Accordingly, loaded GO sheets of aliphatic polyester nanocomposites have lost their antibacterial functions such as nanoknife cutting, blanket wrapping and membrane phospholipid extraction. In contrast, AgNPs fillers of polyester nanocomposites can release silver ions for destroying bacterial cells. Thus, AgNPs fillers are more effective than loaded GO sheets of polyester nanocomposiites in inhibiting bacterial infections. Aliphatic polyester nanocomposites with AgNPs and AgNPs-GO fillers are effective to kill multi-drug resistant bacteria that cause medical device-related infections.
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Affiliation(s)
- Chengzhu Liao
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
| | - Yuchao Li
- Department of Materials Science and Engineering, Liaocheng University, Liaocheng 252000, China
| | - Sie Chin Tjong
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China.
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Aydogdu MO, Altun E, Ahmed J, Gunduz O, Edirisinghe M. Fiber Forming Capability of Binary and Ternary Compositions in the Polymer System: Bacterial Cellulose-Polycaprolactone-Polylactic Acid. Polymers (Basel) 2019; 11:E1148. [PMID: 31277438 PMCID: PMC6681128 DOI: 10.3390/polym11071148] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Revised: 06/20/2019] [Accepted: 06/25/2019] [Indexed: 02/07/2023] Open
Abstract
Bacterial Cellulose (BC) has over recent decades shown great versatility in wound healing dressings, but is difficult to spin fibers with at high concentrations. An investigation into the preparation of bandage-like fibrous meshes is carried out to determine the optimal blend of polycaprolactone (PCL) and polylactic acid (PLA) as a suitable carrier for BC. Using a simple centrifugal spinning setup, polymer blends of PCL, PLA and BC are investigated as a ternary system to determine the most suitable composition with a focus on achieving maximal BC concentration. It is found that BC content in the fibers above 10 wt % reduced product yield. By creating blends of PLA-PCL fibers, we can create a more suitable system in terms of yield and mechanical properties. The fibrous samples are examined for yield, fiber morphology using scanning electron microscopy, mechanical properties using tensile testing and chemical characteristics using Fourier-transform infrared spectroscopy. A fibrous scaffold with > 30 wt % BC was produced with enhanced mechanical properties owing to the blending of PLA and PCL.
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Affiliation(s)
- Mehmet Onur Aydogdu
- Centre for Nanotechnology & Biomaterials Research, Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Goztepe Campus, 34722 Istanbul, Turkey
| | - Esra Altun
- Centre for Nanotechnology & Biomaterials Research, Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Goztepe Campus, 34722 Istanbul, Turkey
| | - Jubair Ahmed
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
| | - Oguzhan Gunduz
- Centre for Nanotechnology & Biomaterials Research, Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Goztepe Campus, 34722 Istanbul, Turkey
- Department of Metallurgical and Materials Engineering, Faculty of Technology, Marmara University, Goztepe Campus, 34722 Istanbul, Turkey
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK.
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10
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Fan Z, Di L, Zhang X, Wang H. A Surface Dielectric Barrier Discharge Plasma for Preparing Cotton-Fabric-Supported Silver Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E961. [PMID: 31266152 PMCID: PMC6669525 DOI: 10.3390/nano9070961] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 06/18/2019] [Accepted: 06/20/2019] [Indexed: 11/16/2022]
Abstract
Cotton-fabric-supported silver nanoparticles (Ag NPs) have aroused great attention due to their remarkable physical and chemical properties and excellent broad-spectrum antibacterial performance.In this work, a surface dielectric barrier discharge (DBD) plasma method is developed and employed to prepare cotton fabric supported Ag NPs (Ag/cotton) for the first time. UV-Vis and X-ray photoelectron spectroscopy (XPS) results confirm the formation of Ag NPs. TEM images show that the size of Ag NPs is in the range 4.8-5.3 nm. Heat-sensitive cotton fabrics are not destroyed by surface DBD plasma according to FTIR and XRDresults. Wash fastness of the Ag/cotton samples is investigated using ultrasonic treatment for 30 min and it is shown that the Ag NPs possess good adhesion to the cotton fabric according to UV-Vis spectra. Antibacterial activity of the Ag/cotton samples shows that obvious bacteriostasis loops are observed around the samples with the appearance of both Gram-negative bacterium Escherichia coli (E. coli) and Gram-positive bacterium Bacillus subtilis (B. subtilis). The average diameter of the bacteriostasis loops against both E. coli and B. subtilis becomes larger with an increasing silver loading amount.This work provides a universal, fast, simple, and environmentally-friendly cold plasma method for synthesizing Ag NPs on heat-sensitive materials at atmospheric pressure.
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Affiliation(s)
- Zhiyuan Fan
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
| | - Lanbo Di
- College of Physical Science and Technology, Dalian University, Dalian 116622, China.
| | - Xiuling Zhang
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
| | - Hongyang Wang
- College of Physical Science and Technology, Dalian University, Dalian 116622, China
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Fernández J, Ribeiro IA, Martin V, Martija OL, Zuza E, Bettencourt AF, Sarasua JR. Release mechanisms of urinary tract antibiotics when mixed with bioabsorbable polyesters. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:529-538. [DOI: 10.1016/j.msec.2018.08.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/23/2018] [Accepted: 08/05/2018] [Indexed: 01/24/2023]
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12
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Cansever Mutlu E, Ficai A, Ficai D, Birinci Yildirim A, Yildirim M, Oktar FN, Demir A. Chitosan/poly(ethylene glycol)/hyaluronic acid biocompatible patches obtained by electrospraying. Biomed Mater 2018; 13:055011. [DOI: 10.1088/1748-605x/aad368] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Paramasivan S, E R N, Nagarajan R, Anumakonda VR, N H. Characterization of cotton fabric nanocomposites with in situ generated copper nanoparticles for antimicrobial applications. Prep Biochem Biotechnol 2018; 48:574-581. [PMID: 30015565 DOI: 10.1080/10826068.2018.1466150] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the present study, cotton fabric nanocomposites with in situ generated copper nanoparticles (CuNPs) were prepared using Cassia alata leaf extract as reducing agent. The prepared cotton fabric nanocomposites were characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and scanning electron microscoy (SEM) techniques. The cotton fabric nanocomposites exhibited significant antibacterial activity against Escherichia coli bacteria. These nanocomposites retained the antibacterial activity even after 15 washes indicating the generation of permanent CuNPs in them. The antibacterial activity of the nanocomposites prepared even in sewerage water was also studied. The obtained results suggest that the cotton fabric nanocomposites with in situ generated CuNPs can be considered for medical and water treatment applications.
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Affiliation(s)
| | - Nagarajan E R
- a Department of Chemistry , Kalasalingam University , Krishnankoil , India
| | - Rajini Nagarajan
- b Department of Mechanical Engineering, Centre for Composite Materials , Kalasalingam University , Krishnankoil , India
| | - Varada Rajulu Anumakonda
- c Centre for Composite Materials, International Research Center , Kalasalingam University , Krishnankoil , India
| | - Hariram N
- d Department of Biotechnology , Kalasalingam University , Krishnankoil , India
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14
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Matharu RK, Porwal H, Ciric L, Edirisinghe M. The effect of graphene-poly(methyl methacrylate) fibres on microbial growth. Interface Focus 2018; 8:20170058. [PMID: 29696090 PMCID: PMC5915660 DOI: 10.1098/rsfs.2017.0058] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/31/2018] [Indexed: 11/30/2022] Open
Abstract
A novel class of ultra-thin fibres, which affect microbial growth, were explored. The microbial properties of poly(methyl methacrylate) fibres containing 2, 4 and 8 wt% of graphene nanoplatelets (GNPs) were studied. GNPs were dispersed in a polymeric solution and processed using pressurized gyration. Electron microscopy was used to characterize GNP and fibre morphology. Scanning electron microscopy revealed the formation of beaded porous fibres. GNP concentration was found to dictate fibre morphology. As the GNP concentration increased, the average fibre diameter increased from 0.75 to 2.71 µm, while fibre porosity decreased. Gram-negative bacteria Escherichia coli and Pseudomonas aeruginosa were used to investigate the properties of 2, 4 and 8 wt% GNP-loaded fibres. GNP-loaded fibres (0 wt%) were used as the negative control. The fibres were incubated for 24 h with the bacteria; bacterial colony-forming units were enumerated by adopting the colony-counting method. The presence of 2 and 4 wt% GNP-loaded fibres promoted microbial growth, while 8 wt% GNP-loaded fibres showed antimicrobial activity. These results indicate that the minimum inhibitory concentration of GNPs required within a fibre is 8 wt%.
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Affiliation(s)
- Rupy Kaur Matharu
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
| | - Harshit Porwal
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Lena Ciric
- Department of Civil, Environmental & Geomatic Engineering, University College London, Chadwick Building, Gower Street, London WC1E 6BT, UK
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, Torrington Place, London WC1E 7JE, UK
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15
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Perera AS, Zhang S, Homer-Vanniasinkam S, Coppens MO, Edirisinghe M. Polymer-Magnetic Composite Fibers for Remote-Controlled Drug Release. ACS APPLIED MATERIALS & INTERFACES 2018; 10:15524-15531. [PMID: 29648781 DOI: 10.1021/acsami.8b04774] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An efficient method is reported, for the fabrication of composite microfibers that can be magnetically actuated and are biocompatible, targeting controlled drug release. Aqueous solutions of polyvinyl alcohol, incorporated with citric acid-coated Fe3O4 magnetic nanoparticles (MNPs), are subject to infusion gyration to generate 100-300 nm diameter composite fibers, with controllable MNP loading. The fibers are stable in polar solvents, such as ethanol, and do not show any leaching of MNPs for over 4 weeks. Using acetaminophen as an example, we demonstrate that this material is effective in immobilization and triggered release of drugs, which is achieved by a moving external magnetic field. The remote actuation ability, coupled with biocompatibility and lightweight property, renders enormous potential for these fibers to be used as a smart drug release agent.
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16
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Toh HS, Faure RL, Mohd Amin LB, Hay CYF, George S. A light-assisted in situ embedment of silver nanoparticles to prepare functionalized fabrics. Nanotechnol Sci Appl 2017; 10:147-162. [PMID: 29238173 PMCID: PMC5716315 DOI: 10.2147/nsa.s139484] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
This article presents a simple, one-step, in situ generation of silver nanoparticle-functionalized fabrics with antibacterial properties, circumventing the conventional, multistep, time-consuming methods. Silver nanoparticle formation was studied with a library of capping agents (branched polyethylenimine [BPEI] of molecular weight [Mw] 10,000 and 25,000, polyvinylpyrrolidone, polyethylene glycol, polyvinylalcohol and citrate) mixed with silver nitrate. The mixture was then exposed to an assortment of light wavelengths (ultraviolet, infrared and simulated solar light) for studying the light-assisted synthesis of nanoparticles. The formation of nanoparticles corresponded with the reducing capabilities of the polymers wherein BPEI gave the best response. Notably, the irradiation wavelengths had little effect on the formation of the nanoparticle when the total irradiation energy was kept constant. The feasibility of utilizing this method for in situ nanoparticle synthesis on textile fabrics (towel [100% cotton], gauze [100% cotton], rayon, felt [100% polyester] and microfiber [15% nylon, 85% polyester]) was verified by exposing the fabrics soaked in an aqueous solution of 1% (w/v) AgNO3 and 1% (w/v) BPEI (Mw 25,000) to light. The formation of nanoparticles on fabrics and their retention after washing was verified using scanning electron microscopy and quantified by inductively coupled plasma optical emission spectrometry. The functional property of the fabric as an antibacterial surface was successfully demonstrated using model bacteria such as Staphylococcus aureus, Enterococcus faecalis and Escherichia coli. The successful generation of silver nanoparticle-functionalized textile fabrics without the use of caustic chemicals, solvents and excessive heating presents a major step towards realizing a scalable green chemistry for industrial generation of functionalized fabrics for a wide range of applications.
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Affiliation(s)
- Her Shuang Toh
- Centre of Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore, Singapore
| | - Roxanne Line Faure
- DUT Analyses Biologiques et Biochimiques, IUT Génie Biologique, Dijon, France
| | - Liyana Bte Mohd Amin
- Centre of Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore, Singapore
| | - Crystal Yu Fang Hay
- Centre of Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore, Singapore
| | - Saji George
- Centre of Sustainable Nanotechnology, School of Chemical and Life Sciences, Nanyang Polytechnic, Singapore, Singapore
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, Sainte-Anne-de-Bellevue, QC, Canada
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17
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Illangakoon UE, Mahalingam S, Matharu RK, Edirisinghe M. Evolution of Surface Nanopores in Pressurised Gyrospun Polymeric Microfibers. Polymers (Basel) 2017; 9:polym9100508. [PMID: 30965811 PMCID: PMC6418950 DOI: 10.3390/polym9100508] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 10/02/2017] [Accepted: 10/06/2017] [Indexed: 01/09/2023] Open
Abstract
The selection of a solvent or solvent system and the ensuing polymer–solvent interactions are crucial factors affecting the preparation of fibers with multiple morphologies. A range of poly(methylmethacrylate) fibers were prepared by pressurised gyration using acetone, chloroform, N,N-dimethylformamide (DMF), ethyl acetate and dichloromethane as solvents. It was found that microscale fibers with surface nanopores were formed when using chloroform, ethyl acetate and dichloromethane and poreless fibers were formed when using acetone and DMF as the solvent. These observations are explained on the basis of the physical properties of the solvents and mechanisms of pore formation. The formation of porous fibers is caused by many solvent properties such as volatility, solubility parameters, vapour pressure and surface tension. Cross-sectional images show that the nanopores are only on the surface of the fibers and they were not inter-connected. Further, the results show that fibers with desired nanopores (40–400 nm) can be prepared by carefully selecting the solvent and applied pressure in the gyration process.
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Affiliation(s)
- U Eranka Illangakoon
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK.
| | | | - Rupy K Matharu
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK.
| | - Mohan Edirisinghe
- Department of Mechanical Engineering, University College London, London WC1E 7JE, UK.
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18
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Liu Y, Liang X, Zhang R, Lan W, Qin W. Fabrication of Electrospun Polylactic Acid/Cinnamaldehyde/β-Cyclodextrin Fibers as an Antimicrobial Wound Dressing. Polymers (Basel) 2017; 9:polym9100464. [PMID: 30965767 PMCID: PMC6418790 DOI: 10.3390/polym9100464] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 09/15/2017] [Accepted: 09/19/2017] [Indexed: 01/12/2023] Open
Abstract
Cinnamaldehyde (CA) was successfully encapsulated in β-cyclodextrin (β-CD), and polylactic acid (PLA)-based composite fibers were prepared by incorporating CA/β-CD via electrospinning. Morphological, structural, spectral, and antibacterial properties of different weight ratios of PLA:β-CD/CA (88:12, 94:6, 97:3, and 98.5:1.5) and PLA/CA/β-CD fibers were investigated. PLA and CA/β-CD were incorporated by mixing of CA/β-CD inclusions to enhance the viscosity of the mixed solution. The mechanical properties and hydrophilicity of nanofibers were improved following the addition of CA/β-CD. Moreover, CA/β-CD improved the antibacterial activities of the mixture against Escherichia coli and Staphylococcus aureus. PLA/CA/β-CD-3 exhibited excellent antibacterial effects and low cytotoxicity. Thus, our study showed that PLA/CA/β-CD fibers may have applications as wound dressing materials and for use in other biomedical applications.
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Affiliation(s)
- Yaowen Liu
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
| | - Xue Liang
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
| | - Rong Zhang
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
| | - Wenting Lan
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
| | - Wen Qin
- College of Food Science, Sichuan Agricultural University, Yaan 625014, China.
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19
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Characterisation of the Chemical Composition and Structural Features of Novel Antimicrobial Nanoparticles. NANOMATERIALS 2017. [PMID: 28644384 PMCID: PMC5535218 DOI: 10.3390/nano7070152] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three antimicrobial nanoparticle types (AMNP0, AMNP1, and AMNP2) produced using the TesimaTM thermal plasma technology were investigated and their compositions were determined using a combination of analytical methods. Scanning electron micrographs provided the morphology of these particles with observed sizes ranging from 10 to 50 nm, whilst FTIR spectra confirmed the absence of polar bonds and organic impurities, and strong Raman active vibrational bands at ca. 1604 and 1311 cm-1 ascribed to C-C vibrational motions were observed. Carbon signals that resonated at δC 126 ppm in the solid state NMR spectra confirmed that sp² hybridised carbons were present in high concentration in two of the nanoparticle types (AMNP1 and AMNP2). X-ray powder diffraction suggested that AMNP0 contains single phase Tungsten carbide (WC) in a high state of purity and multiple phases of WC/WC1-x were identified in both AMNP1 and AMNP2. Finally, X-ray photoelectron spectral (XPS) analyses revealed and quantified the elemental ratios in these composite formulations.
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20
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Hou Y, Wang Z, Zhang P, Bai H, Sun Y, Duan J, Mu H. Lysozyme Associated Liposomal Gentamicin Inhibits Bacterial Biofilm. Int J Mol Sci 2017; 18:ijms18040784. [PMID: 28397768 PMCID: PMC5412368 DOI: 10.3390/ijms18040784] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 04/03/2017] [Accepted: 04/04/2017] [Indexed: 11/18/2022] Open
Abstract
Bacteria on living or inert surfaces usually form biofilms which make them highly resistant to antibiotics and immune clearance. Herein, we develop a simple approach to overcome the above conundrum through lysozyme-associated liposomal gentamicin (LLG). The association of lysozyme to the surface of liposomes can effectively reduce the fusion of liposomes and undesirable payload release in regular storage or physiological environments. The LLG was more effective at damaging established biofilms and inhibiting biofilm formation of pathogens including Gram-positive and Gram-negative bacteria than gentamicin alone. This strategy may provide a novel approach to treat infections due to bacterial biofilm.
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Affiliation(s)
- Yilin Hou
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Zhaojie Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Peng Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Hu Bai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Yuelin Sun
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Jinyou Duan
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
| | - Haibo Mu
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, China.
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