The influence of alumina particle size on the properties and performance of alumina hollow fiber as support membrane for protein separation

Chee, Dayang Norafizan Awang; Ismail, Ahmad Fauzi; Aziz, Farhana; Amin, Mohamed Afizal Mohamed; Abdullah, Noorul Hudai

doi:10.1016/j.seppur.2020.117147

Cited by 20 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, a smooth surface may reduce deposition on the membrane surface . The pristine membrane had a surface roughness ( R a = 0.128 μm and R q = 0.159 μm) comparable with results already reported in the literature for alumina hollow fiber membranes for microfiltration . The modified membranes did not present significant changes in surface roughness compared to the pristine membrane possibly because of the short coating time, thus leading to a thin coating layer.…”

Section: Results and Discussionmentioning

confidence: 99%

“…36 The pristine membrane had a surface roughness (R a = 0.128 μm and R q = 0.159 μm) comparable with results already reported in the literature for alumina hollow fiber membranes for microfiltration. 37 The modified membranes did not present significant changes in surface roughness compared to the pristine membrane possibly because of the short coating time, thus leading to a thin coating layer. Zhu et al 31 observed a decrease in average surface roughness of 22% for coating of PDA onto a surface of a polymeric membrane.…”

Section: Alumina Hollow Fibersmentioning

confidence: 90%

See 1 more Smart Citation

Dynamic Deposition of PDA on a Hollow Fiber Ceramic Membrane for Oily Water Treatment

Alves,

Barbosa,

Santo

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Ceramic membranes have been widely used in oil− water treatment; however, membrane fouling remains a challenge that must be addressed to improve the process feasibility. A thin layer of polydopamine (PDA) was dynamically deposited on the surface of the alumina hollow fiber membranes to reduce oil adhesion. The PDA−alumina membranes were characterized by using SEM-EDS, AFM, and water contact angle measurements. The performance of the modified membranes was evaluated using synthetic crude oil emulsions (100 mg•L −1 ) in a crossflow system. Membranes modified with PDA exhibited 97% oil rejection, and a stabilized permeate flux of 463 L•h −1 •m −2 with a relative flux reduction of 60% and a flux recovery ratio of 75% was observed after cleaning, indicating lower oil adhesion and better fouling reversibility. The most predominant fouling mechanism for the modified membranes seems to be cake filtration because of the reduction in pore size due to the deposition of the PDA layer.

show abstract

Section: Results and Discussionmentioning

confidence: 99%

Section: Alumina Hollow Fibersmentioning

confidence: 90%

Dynamic Deposition of PDA on a Hollow Fiber Ceramic Membrane for Oily Water Treatment

Alves,

Barbosa,

Santo

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…Other pore structural characteristics included in Equation (2), such as the number of pores per volume of the membrane ( N / V ) and the tortuosity ( τ ), cannot justify such large differences. Hence, it becomes evident that due to the quite different size of the two particles’ populations, smaller particles of 0.2 μm either fill the free space between skeleton particles of 1 μm or wedge in the skeleton of large particles, making the structure of the α-Al 2 O 3 disk denser and less porous [ 31 ]. As such, revisiting the calculation of the permeabilities’ ratio with the acceptance that the pore size of the α-Al 2 O 3 disk is totally defined by the interstitial space of the smaller particles, we obtained

, which was in accordance with the experimentally defined value of ~7 × 10 3 .…”

Section: Resultsmentioning

confidence: 99%

A Combined Gas and Water Permeances Method for Revealing the Deposition Morphology of GO Grafting on Ceramic Membranes

et al. 2023

View full text Add to dashboard Cite

The adhesion enhancement of a graphene oxide (GO) layer on porous ceramic substrates is a crucial step towards developing a high-performance membrane for many applications. In this work, we have achieved the chemical anchoring of GO layers on custom-made macroporous disks, fabricated in the lab by pressing α-Al2O3 powder. To this end, three different linkers, polydopamine (PDA), 3-Glycidoxypropyltrimethoxysilane (GPTMS) and (3-Aminopropyl) triethoxysilane (APTMS), were elaborated for their capacity to tightly bind the GO laminate on the ceramic membrane surface. The same procedure was replicated on cylindrical porous commercial ZrO2 substrates because of their potentiality for applications on a large scale. The gas permeance properties of the membranes were studied using helium at 25 °C as a probe molecule and further scrutinized in conjunction with water permeance results. Measurements with helium at 25 °C were chosen to avoid gas adsorption and surface diffusion mechanisms. This approach allowed us to draw conclusions on the deposition morphology of the GO sheets on the ceramic support, the mode of chemical bonding with the linker and the stability of the deposited GO laminate. Specifically, considering that He permeance is mostly affected by the pore structural characteristics, an estimation was initially made of the relative change in the pore size of the developed membranes compared to the bare substrate. This was achieved by interpreting the results via the Knudsen equation, which describes the gas permeance as being analogous to the third power of the pore radius. Subsequently, the calculated relative change in the pore size was inserted into the Hagen–Poiseuille equation to predict the respective water permeance ratio of the GO membranes to the bare substrate. The reason that the experimental water permeance values may deviate from the predicted ones is related to the different surface chemistry, i.e., the hydrophilicity or hydrophobicity that the composite membranes acquire after the chemical modification. Various characterization techniques were applied to study the morphological and physicochemical properties of the materials, like FESEM, XRD, DLS and Contact Angle.

show abstract

Application of Porous Ceramics

Saremi

Ghaani

Keshavarz

et al. 2021

Advanced Functional Porous Materials

View full text Add to dashboard Cite

The influence of alumina particle size on the properties and performance of alumina hollow fiber as support membrane for protein separation

Cited by 20 publications

References 37 publications

Dynamic Deposition of PDA on a Hollow Fiber Ceramic Membrane for Oily Water Treatment

Dynamic Deposition of PDA on a Hollow Fiber Ceramic Membrane for Oily Water Treatment

A Combined Gas and Water Permeances Method for Revealing the Deposition Morphology of GO Grafting on Ceramic Membranes

Application of Porous Ceramics

Contact Info

Product

Resources

About