Helen Vo

Sungkyunkwan University | SKKU · School of Mechanical Engineering

The shrimp aquaculture industry has grown significantly recently, with a notable shift towards more intensive and super-intensive farming practices. While this intensification offers increased production and economic benefits, it raises concerns about energy usage and environmental impact. Aeration systems are crucial in shrimp aquaculture, particu...

Smart biosensors attract significant interest due to real‐time monitoring of user health status, in which bioanalytical electronic devices designed to detect and track various activities and biomarkers in the human body have potential applications in physical sign monitoring and health care. Bioelectronics can also be well integrated by output sign...

Flexible and wearable sensors have attracted increasing attention for use in human motion detection. In this study, various porous network sponges covered in polydimethylsiloxane (PDMS) as hybrid films with and without silver nanomaterials were fabricated for use as strain sensors using a simultaneous immersion-covering method. The structural, morp...

With the rapid advancement of modern technology, flexible and wearable electronics, particularly electromechanical sensors, have gained considerable attention for motion‐based applications in medical health monitoring and artificial intelligence. Correspondingly, extensive efforts have been dedicated to enhancing their performance and practicality....

Bamboo and coffee, which are abundant and inexpensive, have been used as green adsorbents for the adsorption of industrial dye rhodamine B (RB). Bamboo and coffee are natural sources of cellulose, hemicellulose, and lignin, making them promising green materials for industrial dye removal. The effects of various adsorption conditions, such as contac...

Bamboo and coffee, which are abundant and inexpensive, have been used as green adsorbents for the adsorption of industrial dye rhodamine B (RB). Bamboo and coffee are natural sources of cellulose, hemicellulose, and lignin, making them promising green materials for industrial dye removal. The effects of various adsorption conditions, such as contac...

This study has effectively integrated polydimethylsiloxane (PDMS) elastomer and three-dimensional (3D) porous conductive foams (CFs) to fabricate functional (CF-PDMS) composites containing conductive networks via a low-cost, facile and simultaneous freeze-dry-covering method, which possess both broad stretching and sensing ranges, using as flexible...

In this study, the channels-contained hybrid membranes have been fabricated through the incorporation of glass fibers and GO sheets (GO/glass fibers, GG), or a mixture of chitosan/GO (CS/GO/glass fibers, CGG), as hybrid membranes using in organic dye removal. The material properties are well investigated the terms in the morphological, chemical, cr...

This study has suceesfully explored the incorporation of chitosan (CTS) and green filler materials [bamboo powders (BP)–natural material and coffee grounds (CG, reuse of spent CG)–waste material], using as low-cost adsorbents. Notably, the cost of these filler materials was almost zero, which were only washed with distilled-water and air-dried, and...

In the present study, the interfacial surface of glass fiber, i.e., GF-like inorganic membrane, was modified using the functional groups of graphene oxide (GO)/chitosan (CTS) hybrid network for the first time. It is considered as a successful incorporation to fabricate the GO/CTS-GF-GO/CTS (GC-GF-GC) composite membrane for wastewater treatment appl...

Chitosan (CTS) is considered to be a common biomacromolecule/poly-cationic compound containing the potential functional groups that can be utilized as a feedstock for novel materials. In this study, CTS/graphene oxide (CTS/GO, CG) mixtures were prepared at different conditions to confirm a suitable hydrogel formation, then applied to produce paper-...

In this study, a biopolymer sponge (PS) with a crosslinked mixture of gelatin-chitosan-poly(vinyl alcohol) was dipped into graphene oxide (GO) solution to form a composite sponge (CS, GO-coated PS) by a combination of simple dip-coating and freeze-drying procedures, as a sponge-like adsorbent in organic dye removal applications. The morphological,...

Currently, water pollution is a significant health problem for both humans and animals due to large amounts of dye-containing wastewater. Thus, polymer composite membranes (PCMs) are considered as efficient adsorption/filtration membranes that can be utilized for removing organic dyes from contaminated water/wastewater. In this study, the goal is t...

Graphene-based adsorbents have been attracted extensive interest in recent years. Herein, graphene oxide-covered melamine foam (GO-covered MF) was designed and prepared by a mild submerge-covering method with the support of a super-hydrophilic melamine framework, showing its adsorption performances for various organic dyes. The structure morphology...

This study is to bring an overview on various methods regarding the surface treatment performed on different polymeric membranes in relation to a deference between the treatment mechanism and their chemical structure. Herein, plasma and UV surface treatments (PST and UST) were utilized to treat the surfaces of two commercial membranes, i.e., aromat...

To respond the growing demands for consuming natural foods, biochemical compounds originated from natural sources can be one of significant purposes for numerous researchers. In this review, we summarize the literatures regarding to the health effects of coffee consumption toward various human disease treatments, i.e., diabetes, cancer, liver disea...

The gelatin/chitosan (GEL/CTS, GC) membranes have been fabricated well by a simple in-situ method. The as-prepared GC membranes were characterized by morphological surface (scanning electron microscopy, SEM), chemical (Fourier-transform infrared spectroscopy, FT-IR), crystallinity (X-ray diffraction, XRD), thermal (thermal gravimetric analysis, TGA...

Increasing concentration of pollutants has significantly affected the quality of water, especially for organic dyes-contained water/wastewater. This is probably reduced effectively through adsorbing the pollutants onto potential materials-based adsorbents. Chitosan/graphene oxide (CTS/GO) hybrid networks utilizing as adsorbents are attracting consi...

The hydrogel sponges have prepared successfully from gelatin/chitosan (GEL/CTS) matrix with different polyols basing on scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR) analysis. The results indicate that the compressibility and thermal properties (thermal gravimetric analysis, TGA) were improved significantly w...

Microcapsules with urea-formaldehyde shell containing canola oil are fabricated by in-situ polymerization method, which is considered as a common preparation process of the microcapsules with core–shell structure. The results suggest that the microcapsules with up to 80% yield is achieved through a suitable emulsifier concentration and agitation ra...

Medicinal mushrooms are known and used to be nutraceuticals for centuries to enhance health benefits as well as to treat several diseases. Among them, Ganoderma Lucidum (i.e.: G. Lucidum, or red Reishi, or Lingzhi) is appreciated as a medicinal mushroom or significant herbal food for treating diseases, extending life and developing drug. It is dete...

The crosslinked gelatin/chitosan/poly(vinyl alcohol)/hydroxyapatite (GEL/CTS/PVA/HAp, GCPH) sponges were fabricated by a freeze-drying method to yield the reinforced composite sponges with proper features. The porosity value and pore size of the crosslinked GCPH sponges reached ∼80% and 50–100 μm, respectively, which can be an appropriate range to...

With the development of current technology, several concepts of self-healing materials (SHMs) have recently been proposed, and capsule-based SHMs are explored. In our study, a terminal alkyne compound (bis-propargyl-succinate, BPS) is concerned as a healing agent to be used as a core material, and poly(urea-formaldehyde) (PUF) is employed as a wall...

Turmeric (Curcuma longa L.) is widely utilized as a spice, food colorant, and preservative in India, China, and SouthEast Asia. With containing potential turmeric extracts and compounds, it has been utilized in traditional medicine for various diseases counting diabetes, hepatitis, hemorrhoids, hysteria, indigestion, skin disease, inflammation, ano...

With the development of current technology, several concepts of self-healing materials (SHMs) have recently been proposed, and capsule-based SHMs are explored. In our study, a terminal alkyne compound (bis-propargyl-succinate, BPS) is concerned as a healing agent to be used as a core material, and poly(urea-formaldehyde) (PUF) is employed as a wall...

With the current technological development, finding and exploring novel chemical compounds from the natural material sources can be one of the significant purposes for researchers. Especially, saffron is known to be the highest-cost medicinal plant, a high-grade spice, and an outstanding dye. Concomitantly, the final saffron products truly affect m...

A new crosslinker (bis-butyl succinate, BBS) with terminal alkyne group has been explored in this study that can react with glycidyl azide polymer-based polyurethane (original PU) via "azide-alkyne" click reaction, which has supported enhanced mechanical properties and cross-link densities of modified PUs with BBS. Besides, this crosslinker has bee...

Water is a significant natural resource for humans. As such, wastewater containing heavy metals is seen as a grave problem for the environment. Currently, adsorption is one of the common methods used for both water purification and wastewater treatment. Adsorption relies on the physical and chemical interactions between heavy metal ions and adsorbe...

With the development of current technology, many concepts of self-healing materials have recently been proposed. In this study, a preliminary healing ability is investigated by injecting a well-fabricated healing agent (bis-propargyl-succinate, BPS) into a crosslinked polymer (glycidyl azide polymer-based polyurethane, GAP-based PU) with the differ...

The coronavirus disease 2019 (COVID-19) [2019-nCoV; severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)] was first detected in Wuhan, China at the end of 2019. In current status, spread of COVID-19 in person-to-person could be caused mainly by respiratory droplets, which leads to the spread of the influenza virus in both community and clin...

Coronavirus disease 2019 (COVID-19) was found first in Wuhan (China), which was considered as an infectious disease caused by severe acute respiratory syndrome coronavirus 2. Hence, in order to prevent an increasing infectious disease risk, current management strategies againstCOVID-19 should strictly comply for stopping-up the spread of COVID-19 o...

Coronavirus disease 2019 (COVID-19) was found first in Wuhan (China), which was considered as an infectious disease caused by severe acute respiratory syndrome coronavirus 2. Hence, in order to prevent an increasing infectious disease risk, current management strategies against COVID-19 should strictly comply for stopping-up the spread of COVID-19...

Water is one of the most important resources for human survival and development. Efficient wastewater treatment techniques such as coagulation, filtration, ozonation, and reverse osmosis have been studied to remove toxic materials from water. Implementation of adsorption columns has been proven to be an efficient wastewater treatment method, partic...