Membrane characterization using microscopic image analysis

Masselin, Isabelle; Durand-Bourlier, L.; Laîné, J.M.; Sizaret, P; Chasseray, Xavier; Lemordant, Daniel

doi:10.1016/s0376-7388(00)00657-8

Cited by 94 publications

(54 citation statements)

References 8 publications

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“…Mean pore size (dp avg ) and surface porosity (ε) of PSf, PES and PEI substrates were evaluated based on the membrane SEM surface image using the ImageJ software developed by the National Institute of Health (NIH). The FESEM surface images were binarized at a certain threshold in order to obtain a clear image of membrane surface pores following a procedure described in previous studies [22][23][24]. …”

Section: Substrate and Poly(piperazine-amide) Layer Characterizationmentioning

confidence: 99%

Study on the thin film composite poly(piperazine-amide) nanofiltration membrane: Impacts of physicochemical properties of substrate on interfacial polymerization formation

et al. 2014

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Section: Substrate and Poly(piperazine-amide) Layer Characterizationmentioning

confidence: 99%

Study on the thin film composite poly(piperazine-amide) nanofiltration membrane: Impacts of physicochemical properties of substrate on interfacial polymerization formation

et al. 2014

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“…For instance, it has been observed via field emission scanning electron microscopy (FESEM) that some polymeric materials can be restructured by ultrasonic irradiation [110,113,114], such as polyethersulphone (PES), cellulose nitrate with cellulose acetate (CN-CA) or nylon6 (N6); on the other hand Poly Vinylidene Fluoride (PVDF) and Poly Acrylonitrile (PAN) showed no observable damage with long term exposure. Though some work has been done to examine the mechanism of membrane damage by ultrasound [115], caution must be taken to choose proper membrane materials, ultrasonic intensity and irradiation duration to avoid membrane damage.…”

Section: Ultrasonic Systemsmentioning

confidence: 99%

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Yang¹,

Wang²,

Fane³

et al. 2013

Desalination and Water Treatment

116

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Membrane-based separation processes have found numerous applications in various industries over the past decades. However, higher energy consumption, lower productivity and shorter membrane lifespan due to polarization and membrane fouling continue to present severe technical challenges to membrane-based separation. Improved membrane module design and novel hydrodynamics offer strategies to address these challenges.This review focuses on hollow fiber membrane modules which are well-suited to membrane contactor separation processes. Attempts to improve membrane module design should begin with a better understanding of the mass transfer in the hollow fiber module, therefore this review provides a summary of prior studies on the mass transfer models related to both the shell-side and tube-side fluid dynamics. Based on the mass transfer analysis, two types of technique to enhance hollow fiber membrane module performance are discussed: (1) passive enhancement techniques that involve the design and fabrication of effective modules with optimized flow geometry; or (2) active enhancement techniques that uses external energy to induce a high shear regime to suppress the undesirable fouling and concentration polarization phenomena. This review covers the progress over the past five years on the most commonly proposed techniques such as bubbling, vibrations and ultrasound.Both enhancement modes have their advantages and drawbacks. Generally, the passive enhancement techniques offer modest improvement of the system performance, while the active techniques, including bubbling, vibrating and ultrasound, are capable of providing as high as 315 times enhancement of the permeation flux. Fundamentally, the objectives of module design should include the minimization of the cost per amount of mass transferred (energy consumption 3 and module production cost) and the maximization of the system performance through optimizing the flow geometry and operating conditions of the module, scale-up potential and expansion of niche applications. It is expected that this review can provide inspiration for novel module development.

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“…When produced in a sound field at sufficiently high power, the formation of cavitation bubbles will be initiated during the rarefaction cycle [24]. Cavitation may cause enhanced polymerization or depolymerization reactions by temporarily dispersing aggregates or by permanently breaking chemical bonds in polymeric chains [25]. Recently, H 2 O 2 has been used in the degradation of some polysaccharides because it is easily available an environmentally benign [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Sonophotocatalytic Degradation of Poly (Vinyl Pyrrolidone) in the Presence of Fe (III)/H2O2

Orang

Abdollahi²

2014

AJPC

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Abstract:The degradation of poly (vinyl pyrrolidone) (PVP) by means of ultrasound irradiation and its combination with homogeneous photocatalysis (photo-Fenton) was investigated. Emphasis was given on the effect of additive on degradation rate constants. 24 kHz of ultrasound irradiation was provided by a sonicator, while an ultraviolet source of 16 W was used for UV irradiation. To increase the efficiency of degradation process, degradation system was combined with Fe (III) (2.

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Membrane characterization using microscopic image analysis

Cited by 94 publications

References 8 publications

Study on the thin film composite poly(piperazine-amide) nanofiltration membrane: Impacts of physicochemical properties of substrate on interfacial polymerization formation

Study on the thin film composite poly(piperazine-amide) nanofiltration membrane: Impacts of physicochemical properties of substrate on interfacial polymerization formation

Membrane module design and dynamic shear-induced techniques to enhance liquid separation by hollow fiber modules: a review

Sonophotocatalytic Degradation of Poly (Vinyl Pyrrolidone) in the Presence of Fe (III)/H2O2

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