RO Membrane Characterization

Ismail, Ahmad Fauzi; Khulbe, K.C.; Matsuura, Takeshi

doi:10.1016/b978-0-12-811468-1.00003-7

Cited by 13 publications

(10 citation statements)

References 49 publications

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“…The technique involves introducing positrons into a sample where they either annihilate on contact with electrons or form metastable bound states, known as positroniums ( Ps ). The lifetime of the trapped positron is sensitively dependent on the size and even the configurational structure of the vacancy [ 99 , 100 , 101 ]. Beichel et al related the

measured with PALS with the ratio

for [C 4 mim] + -based ILs, Figure 15 [ 3 ].…”

Section: Structural Organizationmentioning

confidence: 99%

“…The analysis was performed at a temperature

, which denotes the “knee” temperature, above

the lifetime does not further mirror the true hole size. For larger holes, positron lifetime saturates, and this sets the limit for size dependence [ 99 , 100 ]. Yu et al observed that

is close to or even coincides with

of the corresponding crystalline structure for [C 4 mim][NTF 2 ], [C 4 mim][PF 6 ] and [C 4 mim][Cl] [ 101 ].…”

Section: Structural Organizationmentioning

confidence: 99%

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Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis

Silva

Zanatta

Ferreira

et al. 2020

IJMS

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In the last few years, ionic liquids (ILs) have been the focus of extensive studies concerning the relationship between structure and properties and how this impacts their application. Despite a large number of studies, several topics remain controversial or not fully answered, such as: the existence of ion pairs, the concept of free volume and the effect of water and its implications in the modulation of ILs physicochemical properties. In this paper, we present a critical review of state-of-the-art literature regarding structure–property relationship of ILs, we re-examine analytical theories on the structure–property correlations and present new perspectives based on the existing data. The interrelation between transport properties (viscosity, diffusion, conductivity) of IL structure and free volume are analysed and discussed at a molecular level. In addition, we demonstrate how the analysis of microscopic features (particularly using NMR-derived data) can be used to explain and predict macroscopic properties, reaching new perspectives on the properties and application of ILs.

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measured with PALS with the ratio

for [C 4 mim] + -based ILs, Figure 15 [ 3 ].…”

Section: Structural Organizationmentioning

confidence: 99%

“…The analysis was performed at a temperature

, which denotes the “knee” temperature, above

the lifetime does not further mirror the true hole size. For larger holes, positron lifetime saturates, and this sets the limit for size dependence [ 99 , 100 ]. Yu et al observed that

is close to or even coincides with

of the corresponding crystalline structure for [C 4 mim][NTF 2 ], [C 4 mim][PF 6 ] and [C 4 mim][Cl] [ 101 ].…”

Section: Structural Organizationmentioning

confidence: 99%

Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis

Silva

Zanatta

Ferreira

et al. 2020

IJMS

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“…Generally, the surface charge of nanoparticles is measured through a zeta potentiometer by applying a voltage to the samples. The results are given in terms of zeta potential ζ, which refers to the difference in the electric potential between the particle surrounding stationary charge layers and the potential of the solution [94][95][96][97]. Zeta potential values higher than +15 mV and lower than −15 mV are usually attributed to colloidally stable suspensions, as they generate electrostatic repulsions that are strong enough to counteract aggregation of the nanoparticles [82,84,85].…”

Section: Advanced Iron Oxide Nanoparticles Characterization Techniquesmentioning

confidence: 99%

New Approaches in Synthesis and Characterization Methods of Iron Oxide Nanoparticles

Chircov¹,

Vasile²

2022

Iron Oxide Nanoparticles

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Recent years have witnessed an extensive application of iron oxide nanoparticles within a wide variety of fields, including drug delivery, hyperthermia, biosensing, theranostics, and cell and molecular separation. Consequently, synthesis and characterization methods have continuously evolved to provide the possibility for controlling the physico-chemical and biological properties of the nanoparticles to better suit the envisaged applications. In this manner, this chapter aims to provide an extensive overview of the most recent progress made within the processes of iron oxide nanoparticle synthesis and characterization. Thus, the chapter will focus on novel and advanced approaches reported in the literature for obtaining standardized nanoparticles with controllable properties and effects. Specifically, it will emphasize the most recent progress made within the microwave-assisted, microfluidics, and green synthesis methods, as they have shown higher capacities of controlling the outcome nanoparticle properties.

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“…From the data, the particle size resembles the size of NPs, while PDI resembles homogeneity of particles distribution; lower PDI samples are made up of more uniform particles size and, there- EDX was employed to investigate the elemental analysis, by determining the elemental composition of individual points or to map out the lateral distribution of elements from the imaged area. Other than that, the EDX has been widely used to study the compositional information on quasi-bulk specimens (low SEM magnification, high accelerating voltage) or on specific particles, morphologies, or isolated areas on filters or within deposits [49].…”

Section: Xrd Analysismentioning

confidence: 99%

Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

et al. 2021

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Nanotechnology-based drug delivery systems are an emerging technology for the targeted delivery of chemotherapeutic agents in cancer therapy with low/no toxicity to the non-cancer cells. With that view, the present work reports the synthesis, characterization, and testing of Mn:ZnS quantum dots (QDs) conjugated chitosan (CS)-based nanocarrier system encapsulated with Mitomycin C (MMC) drug. This fabricated nanocarrier, MMC@CS-Mn:ZnS, has been tested thoroughly for the drug loading capacity, drug encapsulation efficiency, and release properties at a fixed wavelength (358 nm) using a UV–Vis spectrophotometer. Followed by the physicochemical characterization, the cumulative drug release profiling data of MMC@CS-Mn:ZnS nanocarrier (at pH of 6.5, 6.8, 7.2, and 7.5) were investigated to have the highest release of 56.48% at pH 6.8, followed by 50.22%, 30.88%, and 10.75% at pH 7.2, 6.5, and 7.5, respectively. Additionally, the drug release studies were fitted to five different pharmacokinetic models including pesudo-first-order, pseudo-second-order, Higuchi, Hixson–Crowell, and Korsmeyers–Peppas models. From the analysis, the cumulative MMC release suits the Higuchi model well, revealing the diffusion-controlled mechanism involving the correlation of cumulative drug release proportional to the function square root of time at equilibrium, with the correlation coefficient values (R2) of 0.9849, 0.9604, 0.9783, and 0.7989 for drug release at pH 6.5, 6.8, 7.2, and 7.5, respectively. Based on the overall results analysis, the formulated nanocarrier system of MMC synergistically envisages the efficient delivery of chemotherapeutic agents to the target cancerous sites, able to sustain it for a longer time, etc. Consequently, the developed nanocarrier system has the capacity to improve the drug loading efficacy in combating the reoccurrence and progression of cancer in non-muscle invasive bladder diseases.

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RO Membrane Characterization

Cited by 13 publications

References 49 publications

Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis

Revisiting Ionic Liquid Structure-Property Relationship: A Critical Analysis

New Approaches in Synthesis and Characterization Methods of Iron Oxide Nanoparticles

Drug Release Profiles of Mitomycin C Encapsulated Quantum Dots–Chitosan Nanocarrier System for the Possible Treatment of Non-Muscle Invasive Bladder Cancer

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