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- 저자 : VO THI SINH (검색결과 5 건)
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( Vo Thi Sinh ),권영환 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
Many concepts for developing self-healing polymers have recently been proposed. In this study, we have focused on a self-healing systems consisting of microencapsulated healing agents dispersed homogeneously in polymers. The microcapsule are damaged during the microcrack propagation, followed by the leakage of the healing agent. We explore the potential of α,ω-azide-capped crosslinkers with catalystfree azide-alkyne cycloaddition capability as a healing agent and study the microencapsulation of this healing agent. The healing behavior of microcapsule-based self-healing materials is also investigated.
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( Thi Sinh Vo ),( The Thien Ho ),권영환 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
Two types, ester linkage and reverse ester linkage, of five different ethynyl terminated dipolarophile curing agents (CLAs) are synthesized to prepare crosslinked polyurethanes through the formation of 1,2,3-triazole groups. In the study on the CLAs incorporated GAP-based PU, the stress at break and modulus of the polymers are increased, whereas the elongation at the break is decreased on increasing the concentration of the CLAs to the polymer, due to the increased rigid triazole networks. Moreover, the cross-link densities, determined from the Mooney-Rivlin equations, of the 1,2,3-triazole crosslinked polymers increase with increasing the concentration of CLA. Tg was also increased on increasing the cross-link densities.
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VO THI SINH,Vo Tran Thi Bich Chau,석지원,김경훈 나노기술연구협의회 2020 Nano Convergence Vol.7 No.5
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, particularly for the removal of organic contaminants. In this study, we present the preparation of an eco-friendly graphene oxide–chitosan (GC) composite hydrogel column (GCCHC) and its application as a broad-spectrum adsorbent for wastewater treatment. The GCCHC shows a high removal capacity towards different contaminants including both cationic dyes [methylene blue (MB) and rhodamine B (RhB)] and anionic dyes [methylene orange (MO) and congo red (CR)]. Moreover, the samples can be regenerated and recycled without loss of contaminant removal capacity over successive adsorption and washing cycles.
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Heavy metal removal applications using adsorptive membranes
VO THI SINH,MUHAMMAD MOHSIN HOSSAIN,정형모,김경훈 나노기술연구협의회 2020 Nano Convergence Vol.7 No.36
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 adsorbents. Adsorptive membranes (AMs) have demonstrated high effectiveness in heavy metal removal from wastewater owing to their exclusive structural properties. This article examines the applications of adsorptive membranes such as polymeric membranes (PMs), polymer-ceramic membranes (PCMs), electrospinning nanofiber membranes (ENMs), and nano-enhanced membranes (NEMs), which demonstrate high selectivity and adsorption capacity for heavy metal ions, as well as both advantages and disadvantages of each one all, are summarized and compared shortly. Moreover, the general theories for both adsorption isotherms and adsorption kinetics are described briefly to comprehend the adsorption process. This work will be valuable to readers in understanding the current applications of various AMs and their mechanisms in heavy metal ion adsorption, as well as the recycling methods in heavy ions desorption process are summarized and described clearly. Besides, the influences of morphological and chemical structures of AMs are presented and described in detail as well.
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Modified Graphene Oxide-Based Adsorbents Toward Hybrid Membranes for Organic Dye Removal Application
( Thi Sinh Vo ),( Khin Moe Lwin ),( Sun Choi ),( Kyunghoon Kim ) 한국복합재료학회 2022 Composites research Vol.35 No.6
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, crystal, and thermal characterizations for verifying interactions in their formed structure. These hybrid membranes have been fitted well in pseudo-second order and Langmuir models that are associated with chemical adsorption and a monolayer approach, respectively. The highest adsorption ability of methylene blue and methyl orange reached 59.40 mg/g and 229.07 mg/g (GG); and 287.47 mg/g and 252.91 mg/g (CGG), which is more enhanced than that of previous GO-based other adsorbents. Moreover, the dye separation on these membranes could be favorable to superb sealing and trapping dye molecules from water instead of only the dye connection occurring on their surface, regarding the physically sieving effect. The membranes can also be reused within two and three adsorbing-desorbing cycles on the GG and CGG ones, respectively. These membranes can become future adsorbents to be applied for wastewater treatment due to their structural features.
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