Generation of Core–Sheath Polymer Nanofibers by Pressurised Gyration

Muthusubramanian, Shanmugam; Huo, Suguo; Homer‐Vanniasinkam, Shervanthi; Edirisinghe, Mohan

doi:10.3390/polym12081709

Cited by 44 publications

(34 citation statements)

References 36 publications

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“…Alenezi et al [ 32 ] suggested a new type of approach to loading the metal NPs onto the polymer matrices obtained by pressurized gyration techniques. More recently, Mahalingam et al [ 33 ] created core-sheath configuration through an improved pressurized gyration technique utilizing more than one polymer in a single step on a large-scale technique. However, some of these methods are either expensive, energy-intensive, complicated or require toxic organic substances.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of SiO2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces

et al. 2021

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Silver nanoparticles (Ag NPs) as antibacterial agents are of considerable interest owing to their simplicity, high surface area to volume ratio, and efficient oligodynamic properties. Hence, we investigated the synthesis of silica-supported Ag NPs (SiO2@Ag) as an effective antibacterial agent by using a wet-impregnation method. The formation of SiO2@Ag with Ag NP (5–15 nm diameter) on the silica particle (100–130 nm diameter) was confirmed with transmission electron microscopy (TEM). The study on antibacterial activity was performed in a liquid culture to determine the minimum inhibitory concentration (MIC) against Escherichia coli (E. coli) and Bacillus subtilis (B. subtilis) bacteria. Both bacteria are chosen to understand difference in the effect of Ag NPs against Gram-negative (E. coli) and Gram-positive (B. subtilis) bacteria. SiO2@Ag mesoporous nanoparticles had excellent antibacterial activity against E. coli bacteria and fully restricted the bacterial growth when the material concentration was increased up to 1.00 mg/mL. In addition, the obtained material had good adhesion to both steel and polyethylene substrates and exhibited a high inhibition effect against E. coli bacteria.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of SiO2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces

et al. 2021

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“…Whether it is compression or tensile properties, 0.03 m ZnO@BCCS hydrogel shows the best results. Recently, Edirisinghe and co‐workers proposed a method for preparing core–sheath bicomponent polymer nanofibers, [ 37 ] which will provide important inspiration for our future work. In the work of Edirisinghe and co‐workers, water‐soluble polymers polyethylene oxide (PEO) and polyvinyl pyrrolidone (PVP) are used as the core and sheath layers, respectively.…”

Section: Resultsmentioning

confidence: 99%

Preparation, Characterization, and Cytotoxicity Evaluation of Zinc Oxide–Bacterial Cellulose–Chitosan Hydrogels for Antibacterial Dressing

Jiang

Zhou²

2020

Macro Chemistry & Physics

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Lin et al. evaluated the cell compatibility and antibacterial activity of bacterial cellulose-chitosan (BC-CS) membranes in vitro. [6] BC is widely used in antibacterial aspects. Wu et al. proposed a preparation method of slow-released antimicrobial wound dressing. [7] Common antibacterial agents for improving BC include benzalkonium chloride, [8] copper, silver, ZnO nanoparticles, sulfadiazine silver, [9] polyhexamethylene guanidine hydrochloride (PHMB), [10] sericin, CS, propolis, [11] and so on. Recently, some researchers were interested in sericin. Napavichayanun et al. [12] combined sericin with PHMB to develop a dressing that was beneficial to the wound. The modified cotton fabric prepared by Doakhan et al. using sericin and nano-TiO 2 had well antibacterial activity and durability. [13] Maneerung et al. used a chemical reduction method to prepare BC antibacterial wound dressings containing silver nanoparticles. [14] CS was obtained by deacetylation of chitin, which was the most abundant naturally occurring biopolymer after cellulose. [15] CS is considered to be a promising biomedical material because of its good biocompatibility, rich functional groups, nontoxicity, degradability, and antibacterial properties. Although CS and BC had such significant advantages, related studies had shown that they were rarely used alone. The reason was that the hydrogels formed by CS had low mechanical strength [16] such as poor flexibility and low ability to elongate and the BC hydrogels itself did not have antibacterial properties. [17,18] CS could be combined with other biopolymers to improve properties. Wu et al. [19] enhanced the mechanical strength of CS by adding oxidized chitin nanocrystals to the CS film. To the best of our knowledge, zinc oxide had not been reported in CS and BC composite hydrogels. Some studies only considered a single factor, which leaded to some inevitable defects. For example, the composite hydrogels were formed by using BC and CS, but the antibacterial property was low due to partial reaction of the amino group on the CS. For example, Liang et al. found that the antimicrobial efficiency of composite films against Escherichia coli was reduced. [20] On the other hand, excessive zinc oxide can cause severe cytotoxicity. Vandebriel et al. suggested that zinc oxide nanoparticles may be cytotoxic In this work, a kind of novel antibacterial and biocompatible composite hydrogels composed of zinc oxide, bacterial cellulose (BC), and chitosan (CS) are prepared via immersing the oxidized BC hydrogels in CS solution and then combining zinc oxide in alkaline environment. The structure and properties of the composite hydrogels are characterized by different techniques. The results of Fourier transform infrared spectroscopy and X-ray diffraction prove the successful preparation of composite hydrogels. Scanning electron microscopy is used to study the microscopic morphology of hydrogels. The results show that the zinc oxide particles are successfully attached to the bacterial cellulose. From the results of t...

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“…copper nanoparticles, whilst the core of the fibres can be a strong polymer which imparts the strength and toughens the mask. This requires upscaling mass production to suit, and work has already been carried out to achieve this [ 16 , 17 ]. However, in parallel, existing respirators and masks need upgrading to properly inhibit the entry of viral particles, and as with Covid-19, these can be smaller than 100nm.…”

Section: Materials and Technologiesmentioning

confidence: 99%

Perspective: Covid-19; emerging strategies and material technologies

et al. 2021

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It will be remembered in history as the event that brought the world together with science and technology; the COVID-19 pandemic has allowed for decades worth of progression in both healthcare policies and technology development. It has been a show of unprecedented global health policies ranging from the legal requirement for public facemask use to the use of tough movement restrictions that has bought the world’s economy to its knees. Here, we observe the impact of national lockdowns, facemask usage, and their effect on infection rates. It is clear that healthcare policies alone cannot tackle a pandemic. There is a huge pressure to develop personal protective equipment that not only has the capacity to prevent transmission but also has the ergonomics to be worn for long durations. In this work, we reveal our views and thoughts on the healthcare policies and developing materials and technology strategies that have contributed to reduce the damage of the pandemic, coming from the perspectives of materials scientists and a UK National Health Service consultant doctor.

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Generation of Core–Sheath Polymer Nanofibers by Pressurised Gyration

Cited by 44 publications

References 36 publications

One-Pot Synthesis of SiO2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces

One-Pot Synthesis of SiO2@Ag Mesoporous Nanoparticle Coating for Inhibition of Escherichia coli Bacteria on Various Surfaces

Preparation, Characterization, and Cytotoxicity Evaluation of Zinc Oxide–Bacterial Cellulose–Chitosan Hydrogels for Antibacterial Dressing

Perspective: Covid-19; emerging strategies and material technologies

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