Nanogels obtained by gamma radiation induced polymerization

Shafie, Nur Fathin Amirah; Hamzah, Mohd Yusof; Ali, Rusmidah

doi:10.14314/polimery.2021.9.1

Cited by 2 publications

(1 citation statement)

References 39 publications

(44 reference statements)

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“…These were similar to the accepted ideal size for nanogel in drug delivery applications, 70-200 nm [24,29]. A rose in size measurement at a higher dose was observed, attributable to the aggregation of nanogels [30,31].…”

Section: Resultssupporting

confidence: 69%

Laser Intensity of Thermo-Responsive Nanoparticles Size Measurement Using Dynamic Light Scattering

Shafie

Faizo

Ali

et al. 2022

ARFMTS

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Dynamic light scattering (DLS) or photon cross-correlation spectroscopy (PCCS) is a very potent means for analyzing the diffusion behaviour of supramolecules in their solution form. The diffusion coefficient, probed from the scattered light by supramolecules underexposure to incident light, allows the hydrodynamic radii to be calculated. However, the scattering values were recently misled by an unexpected interaction between the incident light and thermo-sensitive nanogels. Hence, in turn, it resulted in a miscalculation of the size of the nanogels by more than 100% of their expected values. The study fulfills a vital knowledge gap by investigating the effects of laser intensity on the size of thermo-sensitive Poly(N-Isopropyl Acrylamide-Vinyl Pyrrolidone-Polyethylene Glycol Diacrylate-(2-(Dimethyl Amino)Ethyl Methacrylate)), Poly(NIPAAM-PVP-PEGDA-DMAEMA) nanogels and subsequent count rates in DLS measurements. The Lower Critical Solution Temperature, LCST phase transition of Poly(NIPAAM-PVP-PEGDA-DMAEMA) nanogel can be observed using the DLS technique. The higher laser intensity was advantageous for measuring at high dilution more vigorously with varying laser intensities. Thus, a sufficient laser intensity should be chosen based on the light scattering characteristics of typical samples.

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Section: Resultssupporting

confidence: 69%

Laser Intensity of Thermo-Responsive Nanoparticles Size Measurement Using Dynamic Light Scattering

Shafie

Faizo

Ali

et al. 2022

ARFMTS

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Computational Scale-Up for Flood Fed/Starve Fed Single Screw Extrusion of Polymers

Nastaj

Wilczyński

2022

Polymers

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A novel scaling-up computer system for single screw extrusion of polymers has been developed. This system makes it possible to scale-up extrusion process with both starve feeding and flood feeding. Each of the scale-up criteria can be an objective function to be minimized, represented by single values or functional dependencies over the screw length. The basis of scaling-up is process simulation made with the use of the GSEM program (Global Screw Extrusion Model). Scaling-up is performed using the GASES program (Genetic Algorithms Screw Extrusion Scaling) based on Genetic Algorithms. Scaling-up the extrusion process has been performed to increase extrusion output according to the scaling-up criteria defined by the single parameters of unit energy consumption, polymer plasticating rate and polymer temperature, as well as by the process parameters profiles of the temperature and plasticating. The global objective function reached the lowest value for the selected process parameters, and extrusion throughput was significantly increased.

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Nanogels obtained by gamma radiation induced polymerization

Cited by 2 publications

References 39 publications

Laser Intensity of Thermo-Responsive Nanoparticles Size Measurement Using Dynamic Light Scattering

Laser Intensity of Thermo-Responsive Nanoparticles Size Measurement Using Dynamic Light Scattering

Computational Scale-Up for Flood Fed/Starve Fed Single Screw Extrusion of Polymers

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