Article
Construction & Building Technology
Tong Yin, Zixin Zhang, Xin Huang, Thomas Shire, Kevin J. Hanley
Summary: This study used numerical simulations to investigate the evolution of pore structure and pressure transmission mechanisms during slurry filtration, identifying different types of filter cake formation and revealing the relationship between the infiltration state of slurry particles and D-c50.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Chengwei Xu, Yan Yu, Xiaodong Si
Summary: In this study, the performance of a coalescing filter with a drainage layer made of commercial glass fibrous filters was investigated. The results showed that pore size and thickness were the key factors influencing the wet pressure drop and quality factor, while the wettability of the drainage layer had a negligible effect on performance.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Engineering, Chemical
Chengwei Xu, Yan Yu, Xiaodong Si
Summary: The study found that employing superoleophilic treatment in filters can reduce pressure drop and improve filtration efficiency, while the combination of superoleophilic and superoleophobic filters with drainage strategy did not show significant advantages. An appropriate rank of drainage layer could enhance drainage rate at unsaturation stage.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2021)
Article
Energy & Fuels
Shuai Shi, Jinxian He, Xiaoli Zhang, Ziqi Yu, Jian Wang, Tiantian Yang, Wei Wang
Summary: This study investigates the pore characteristics and evolution of tar-rich coal during coal metamorphism through temperature-pressure controlled simulation experiments. The findings reveal that tar-rich coals have five different genetic types of pores, with a tendency of growth for gas pores and fissures, reduction for cellular pores, and no significant change for mold pores and intergranular pores. Quantitative analysis shows that macropores are the primary source of pore volume, micropores are the most active in evolution, and mesopores exhibit a U-shaped characteristic. Three phases of pore evolution in tar-rich coal can be distinguished, which are closely related to coalification jumps.
Article
Environmental Sciences
Jianyu Ren, Xuesong Yan, Lidong Zhang, Guohua Yang
Summary: Experimental results show that using an external electric field in dual-layer granular bed filters can effectively improve the filtration efficiency for micro-silica powder. Pre-charging the dust and adjusting the application of the electric field can reduce the outlet dust concentration and pressure drop, leading to better filtration performance.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Chemical
Jonathan Nuvoli, Soleiman Bourrous, Francois-Xavier Ouf, Dominique Thomas
Summary: This study focuses on controlling properties of nanoparticle films, particularly in terms of porosity, through numerical simulations and experimental studies, ultimately correlating porosity values with the Stokes number.
JOURNAL OF AEROSOL SCIENCE
(2021)
Article
Engineering, Chemical
S. Rambabu, K. Kartik Sriram, Siddharth Chamarthy, P. Parthasarathy, V. Ratna Kishore
Summary: This study presents a numerical investigation on estimating pressure drop in fluid flow through ideal and randomized porous structures. A pressure drop correlation is proposed based on the analysis of pressure drop variation with respect to different factors. The proposed correlation is compared with experimental and numerical data from real structures to validate its effectiveness.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Food Science & Technology
Lu Wang, Nadia Boussetta, Nikolai Lebovka, Eugene Vorobiev
Summary: The study found that increasing the transmembrane pressure can improve the sieving ratios of the membrane towards polyphenols, proteins, total solutes, and color intensity. Using a specific membrane for DC electro-filtration can effectively reject proteins and selectively purify polyphenols.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Him Cheng Wong, Shi Ke Ong, Erik Birgersson, Mei Chee Tan, Hong Yee Low
Summary: This paper introduces a hierarchically-arranged multilayer isoporous air filter, consisting of an ultrathin nanoporous active filtration layer and a microporous support layer. By designing and fabricating microscale spacer structures, a gap was created between the nanoporous and microporous membranes, maximizing airflow and reducing pressure drop across the membrane.
APPLIED MATERIALS TODAY
(2023)
Article
Engineering, Multidisciplinary
Ahmad Naufal bin Samsudin, Alhassan Salami Tijani, Sajith Thottathil Abdulrahman, Jeeventh Kubenthiran, Ibrahim Kolawole Muritala
Summary: This study investigates the heat transfer performance and fluid flow characteristics of different geometric configurations of new heat sinks. The effects of wings and number of pins on the heat sink performance are numerically analyzed. The results show that adding wings to the pin fins significantly enhances heat dissipation, but the heat transfer enhancement is higher for Perforated Hollow Pin-Fin Heat Sink (PHPFHS) without wings. The presence of wings increases pressure drop and suppresses flow separation.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Raheleh Faridi-Majidi, Faezeh Norouz, Safieh Boroumand, Seyed Nasrollah Tabatabaei, Reza Faridi-Majidi
Summary: This study examines the effects of different decontamination techniques on the integrity and functionality of nanofiber-based N95 masks. The results show that decontamination with 70% ethanol can cause significant unfavorable changes in filtration efficiency and microstructure. On the other hand, autoclave and UV light do not have a significant impact on filtration efficiency or microstructure.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Hao Jin, Shihang Li, Jun Hou, Changgeng Gui, Liang Yuan, Fubao Zhou
Summary: This study investigates the effect of rolling points on the filtration performance of filter media. The results show that rolling points increase the initial pressure drop and resistance coefficient of clean filter media, but have minimal impact on filtration efficiency. Filter media without rolling points have larger effective filtration areas, lower pressure drops, and higher quality factors compared to those with rolling points.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Civil
Xin Liu, Annan Zhou, Shui-long Shen, Jie Li
Summary: The pore morphology method (PMM) is commonly used to simulate the drainage process of porous media. A new enhanced method called Lvca-PMM is proposed, which takes into account locally variable contact angles and can reproduce the primary drainage process under different wettability conditions.
JOURNAL OF HYDROLOGY
(2022)
Article
Materials Science, Characterization & Testing
Rok Mravljak, Ozbej Bizjak, Matejka Podlogar, Ales Podgornik
Summary: Experimental results demonstrate the pore structure and permeability of polymerized high internal phase emulsions (polyHIPE). The pressure drop on polyHIPE is related to the interconnecting pore diameter, while the permeability is linearly correlated with flow-through porosity and independent of porosity.
Article
Engineering, Chemical
Shaowu Yin, Peng Kang, Ying He, Li Wang, Chuanping Liu, Lige Tong, Yulong Ding
Summary: The new moving granular bed filter is designed to achieve high-efficiency filtration of fine dust and high performance for different environments, with wide adaptability. This filter demonstrates better dust removal performance, low bed resistance, and high filtration efficiency, maintaining a high filtration efficiency while reducing bed pressure drop effectively.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Composites
Tomas Webbe Kerekes, Hangil You, Tahmineh Hemmatian, Jooyoun Kim, Gun Jin Yun
Summary: A novel approach to enhance the mechanoluminescence (ML) sensitivity of composite materials was proposed by subjecting the composite to ultrasonic vibration during the curing process. Different ultrasonic frequencies were applied to investigate their effect on ML sensitivity, and fractography analyses and micro-CT tests were conducted to understand the changes in interfacial bonding integrity and particle dispersion. The physical mechanisms behind how ultrasonic curing treatment (UCT) enhances interfacial bonding strength were discussed in the study.
COMPOSITE INTERFACES
(2021)
Article
Materials Science, Textiles
Seojin Jung, Jehyung Yi, Jooyoun Kim
Summary: This study analyzed the effects of different coverweb materials on blood penetration resistance, finding that both surface wettability and physical parameters have an impact. When the coverweb and filter web become hydrophobic, the filtration efficiency against oily aerosols can be enhanced without compromising comfort properties.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Materials Science, Multidisciplinary
Yoonkyung Cho, Jooyoun Kim, Chung Hee Park
Summary: This study innovatively applies digital imaging techniques to quantify the irregular nanoscale roughness of hydrophobic polymer film surfaces. By extracting texture parameters and roughness profiles, a predictive model for surface wettability is obtained. The results indicate that both the height profile and 2D spatial distribution of roughness features strongly affect surface wettability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Halim Lee, Hyungwoo Lee, Soyeon Ahn, Jooyoun Kim
Summary: As rapid industrial growth leads to severe water contamination, there is a high demand for the development of purification systems. This study focuses on the development of a visible light-induced photocatalytic adsorbent membrane and investigates its purification capability through adsorption and photocatalytic degradation. The results show that the membrane has a high adsorption capacity for water-soluble organic pollutants and can effectively degrade them under visible light, making it a promising solution for water contamination issues.
Article
Materials Science, Textiles
Jiyul Lee, Kyeongeun Lee, Hanjou Park, Jooyoun Kim
Summary: This study investigates the effect of storage temperature and humidity on the structural characteristics and charges of an electret filter, associating with the filtration performance. It found that humid storage conditions significantly deteriorated the filtration efficiency, and high temperature caused a lowered electrostatic filtration efficiency. The study provides scientific reference for the desirable storage condition and replacement cycle of filtering masks.
JOURNAL OF INDUSTRIAL TEXTILES
(2022)
Article
Nanoscience & Nanotechnology
Seojin Jung, Seokhee Chang, Na-Eun Kim, Seong-O Choi, Yoon-Jae Song, Yue Yuan, Jooyoun Kim
Summary: A feasible strategy of on-demand drug delivery for dermal inflammation treatment under low-pH conditions is proposed. Zeolitic imidazolate framework-8 (ZIF-8) is used as a pH-responsive nanoparticle and curcumin (CCM) as a model drug. The drug is embedded in acid-degradable ZIF-8 nanoparticles and incorporated into water-dissolvable microneedles. In vitro tests demonstrate the pH-responsive drug release ability, high biocompatibility, and biodegradability of ZIF-8.
ACS APPLIED NANO MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jinwook Lee, Jaeseon Yoo, Jooyoun Kim
Summary: This study develops a novel colorimetric indicator for real-time visual detection of ambient sulfur oxides (SOx). By optimizing the ratio of copper to mIm, the treated fabric shows improved Cu(mIm) loading capacity, gas adsorption performance, and colorimetric response. It is found that environmental humidity plays a crucial role in the adsorption and chromatic reaction of Cu(mIm). The chromatic reaction occurs close to the breakthrough concentration of 5 ppm, enabling timely replacement of protective materials.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Juran Kim, Jinwook Lee, Jooyoun Kim
Summary: In situ growth of cyclodextrin-based metal-organic frameworks (CD-MOFs) on poly(ethylene terephthalate) fibers (CD-MOFs-PET) was investigated for the effective fabrication of MOF composites. The CD-MOFs-PET with 24 h growth time exhibited the highest surface area without crystal deformation, achieving a specific surface area 235 times higher than pristine PET fibers. The 24 h CD-MOFs-PET showed efficient removal of PM0.1 and SO2 gas, with removal efficiencies higher than 99% and 95% respectively. Furthermore, the CD-MOFs-PET demonstrated high recovery of SO2 adsorption ability through repeated adsorption-desorption cycles.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Hanjou Park, Jeongmin Oh, Yaewon Park, Sungmin Kim, Jooyoun Kim
Summary: To address the problem of filter wastes, an ecofriendly alternative filter material using plant-sourced biomaterials, namely poly(lactic acid) (PLA) and fungal chitin, was developed. Heterogeneous electrospun fibers with distinctive chitin-rich and PLA-rich regions were formed by inducing phase separation between hydrophilic chitin and hydrophobic PLA polymers. The filtration performance of PLA and chitin-incorporated PLA (ChPLA) webs against NaCl nanoparticles was evaluated, and the study examined the contribution of mechanical and electrostatic particle capture mechanisms, as well as the effect of aging and environmental conditions. The research also demonstrated that ChPLA has higher degradability than PLA in a soil burial test.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kyeongeun Lee, Dongmi Kim, Jooyoun Kim
Summary: This study investigates different modeling methods for air filtration and verifies their accuracy through computational simulations and comparisons with actual test results. The study shows that resolved models, parametric models, and porous plane models are suitable for predicting the characteristics of filter media on different scales. Furthermore, the study explores the relationships among filter morphology, face velocity, and particle size, providing useful insights for accurate predictions of filtering behaviors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Jeongmin Oh, Hanjou Park, Jooyoun Kim, Yaewon Park
Summary: In this study, controllable pore structures were achieved in mushroom chitin membranes by utilizing a simple process with readily available Agaricus bisporus mushrooms. The freeze-thaw method was applied to modify the pore structures of the membranes, which consist of chitin fibril clusters embedded in a glucan matrix. These mushroom chitin membranes demonstrated effective separation of stable oil/water emulsions with different chemical properties and concentrations, as well as particle contaminants from water. By increasing the number of freeze-thaw cycles, the membranes exhibited more intricate pore structures, resulting in higher flux while maintaining rejection performance.
ACS APPLIED BIO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Eugene Song, Kyeongeun Lee, Jooyoun Kim
Summary: A fiber-based bacteria sensor has been developed in this study, which demonstrates reliable sensing capability for detecting live bacteria. The color intensity of the sensor is measured to detect different types of bacteria, and the sensitivity varies with different membrane materials.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Suhyun Lee, Soyeon Ahn, Halim Lee, Jooyoun Kim
Summary: Efforts have been made to develop a reusable adsorbent and photocatalytic agent by synthesizing MIL-100(Fe) onto a cotton fabric using the layer-by-layer process. The adsorption performance was enhanced with an increased MIL-100(Fe) add-on, but the specific adsorption efficiency per unit mass was reduced with more cycles. The fabric demonstrated a 96% removal efficiency for RhB in water through adsorption and photodegradation.