Formation of Protein and Protein–Gold Nanoparticle Stabilized Microbubbles by Pressurized Gyration

Muthusubramanian, Shanmugam; Raimi-Abraham, Bahijja Tolulope; Craig, Duncan Q.M.; Edirisinghe, Mohan

doi:10.1021/la502181g

Cited by 67 publications

(79 citation statements)

References 35 publications

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“…In pressurised gyration, rotating speed and working pressure of the solution being spun can determine the morphology of the product [24] and therefore careful selection of the operation region has to be selected. The physical properties of the polymer solutions significantly influence the jet formation and fibre formation during pressurised gyration.…”

Section: Resultsmentioning

confidence: 99%

Physio-chemical and antibacterial characteristics of pressure spun nylon nanofibres embedded with functional silver nanoparticles

Muthusubramanian

Rohn

et al. 2015

Materials Science and Engineering: C

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A novel and facile approach to prepare hybrid nanoparticle embedded polymer nanofibers using pressurised gyration is presented. Silver nanoparticles and nylon polymer were used in this work. The polymer solution's physical properties, rotating speed and the working pressure had a significant influence on the fibre diameter and the morphology. Fibres in the range of 60-500nm were spun using 10wt.%, 15wt.% and 20wt.% nylon solutions and these bead-free fibres were processed under 0.2MPa and 0.3MPa working pressure and a rotational speed of 36,000rpm. 1-4wt.% of Ag was added to these nylon solutions and in the case of wt.% fibres in the range 50-150nm were prepared using the same conditions of pressurised gyration. Successful incorporation of the Ag nanoparticles in nylon nanofibres was confirmed by using a combination of advanced microscopical techniques and Raman spectrometry was used to study the bonding characteristics of nylon and the Ag nanoparticles. Inductively coupled plasma mass spectroscopy showed a substantial concentration of Ag ions in the nylon fibre matrix which is essential for producing effective antibacterial properties. Antibacterial activity of the Ag-loaded nanofibres shows higher efficacy than nylon nanofibres for Gram-negative Escherichia coli and Pseudomonas aeruginosa microorganisms, and both Ag nanoparticles and the Ag ions were found to be the reason for enhanced cell death in the bacterial solutions.

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Section: Resultsmentioning

confidence: 99%

Physio-chemical and antibacterial characteristics of pressure spun nylon nanofibres embedded with functional silver nanoparticles

Muthusubramanian

Rohn

et al. 2015

Materials Science and Engineering: C

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“…fibres, microbubbles, capsules etc [14,15]. It effectively utilizes high speed rotation to extrude several solution jets in parallel from orifices that are located on the vessel surface.…”

Section: Introductionmentioning

confidence: 99%

Beads, beaded-fibres and fibres: Tailoring the morphology of poly(caprolactone) using pressurised gyration

Hong

Edirisinghe

Muthusubramanian

2016

Materials Science and Engineering: C

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This work focuses on forming bead on string poly(caprolactone) (PCL) by using gyration under pressure. The fibre morphology of bead on string is an interesting feature that falls between bead-free fibres and droplets, and it could be effectively controlled by the rheological properties of spinning dopes and the major processing parameters of the pressurised gyration system which are working pressure and rotating speed. Bead products were not always spherical in shape and tender to be more elliptical, therefore both their width and length were measured. The average bead width and length produced spanned a range 145 -660µm and 140 -1060µm, respectively. The average distance between two adjacent beads (i.e. inter-bead distance) and the bead size (width and length) are shown to be a function of processing parameters and polymer concentration. An interesting morphology i.e. beads with short fibre was observed when using a high polymer concentration. Bead on string structure agglomeration was promoted by a low polymer concentration. Formation of droplets or agglomerated bead on string is promoted below 5wt% polymer concentration, and beads with short fibre were present in the microstructure beyond a polymer concentration of 20 wt%.

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“…Pressurised gyration is a novel and facile method that has been used to form various structures including fibres, microbubbles and capsules [14][15][16]. The use of gyration eliminates most of the problems associate with electrospinning, in particular the optimisation of electrical properties of the spinning solution.…”

Section: Introductionmentioning

confidence: 99%

Facile one-pot formation of ceramic fibres from preceramic polymers by pressurised gyration

Muthusubramanian

Pierin

Colombo

et al. 2015

Ceramics International

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Formation of Protein and Protein–Gold Nanoparticle Stabilized Microbubbles by Pressurized Gyration

Cited by 67 publications

References 35 publications

Physio-chemical and antibacterial characteristics of pressure spun nylon nanofibres embedded with functional silver nanoparticles

Physio-chemical and antibacterial characteristics of pressure spun nylon nanofibres embedded with functional silver nanoparticles

Beads, beaded-fibres and fibres: Tailoring the morphology of poly(caprolactone) using pressurised gyration

Facile one-pot formation of ceramic fibres from preceramic polymers by pressurised gyration

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