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( Tran Xuan Tin ),김희택,박성수,( Shao Godlisten Namwel ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The aim of this study to investigate the behavior of urea discharge from slow-release urea fertilizer with carrier of bentonite and zeolite minerals on different simulated soil solutions such as acid soil, neutral soil and saline soil. The formed beads and the controlled release ammonium process due to special structure of bentonite, zeolite and membrane forming from alginate and crosslinker calcium chloride. The characterization of products were determined by using XRD, XRF, BET, SEM, as well as swelling study. The other characteristics like entrapment efficiency, bead mass, bead size were also calculated. The content of urea present in simulated soils environment at the certain period of time and mechanism for the release of urea were determined using HPLC. The release of the bentonite-based formations was slower than the zeolitebased formulations from all simulated soils environment. Especially, the ammonium ion release rate in saline soil environment was faster than neutral soil and acid soil. It was found that the mechanism of ammonium ion release occurred through the first order kinetic model.
( Tran Xuan Tin ),김문규,최귀준,박성수,송시내,김희택 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0
The present study demonstrates a simple technique to obtain carbon nanotube (CNT) growth rapidly on the reduced graphene oxide (rGO) surface within just 10 s under ambient conditions via microwave assisted approach. A series of PPy/RGO/CNT composites were then prepared by loading with the different weight percent of RGO/CNT on the polypyrrole polymer (PPy) via in situ oxidative polymerization of pyrrole (Py) in the presence of dodecylbenzenesulfonic acid, which acts as a stabilizing and doping agent. The morphological, structural, and thermal properties of PPy/RGO/CNT composites were examined by SEM, TEM, FT-IR, XRD, UV, XPS, PL and TGA analyses. An enhanced conductivity was observed in the case of composites loading with GO/CNT content range from 1 to 5 % in compared that in individual PPy samples pressed at the same pressing pressure.
( Tran Xuan Tin ),박성수,( Manwar Hussain ),김희택 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
A facile approach for fabricating polypyrrole/carbon black nanocomposites (PPy/CB) decorated with silver nanoparticles with enhancing the electrocatalysis and the antibacterial property has been carried out via one-pot photopolymerization of pyrrole monomer using silver nitrate as photoinsentizer in the presence of carbon black (CB). Carbon black was functionalized by silane groups to provide anchor sites for the polypyrrole/ silver composite coating. The formation mechanism, structural, morphological properties, and electrical conductivity of the obtained PPy/CB/Ag nanocomposites were studied in detail. The electrical conductivity and thermal stability of the PPy/CB/Ag nanocomposites were higher than those of PPy/CB nanocomposites and pure PPy. The PPy/CB/Ag nanocomposites exhibited a well-defined response to the electrochemical reduction of hydrogen peroxide. Moreover, PPy/CB/Ag nanocomposites also showed excellent antibacterial activity against Escherichia coli bacteria.
( Tran Xuan Tin ),박성수,( Manwar Hussain ),김희택 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1
In this research, polypyrrole/silica nanotube/silver nanocomposites (PPy/SiNTs/Ag) were prepared via UV-induced dispersion polymerization of pyrrole monomer using silica nanotubes (SiNTs) as a template and silver nitrate as the photoinitiator. SiNTs were prepared from the natural halloysite nanotubes by the acid-leaching method. The SiNTs were then modified by silane coupling agent (3-APTES) in order to provide anchor sites for depositing of PPy/Ag nanocomposite chains. The formation mechanism, morphological, structure characteristics of the obtained PPy/SiNTs/Ag nanocomposites were reported. The PPy/SiNTs/Ag nanocomposites showed higher electrical conductivity and thermal stability than those of PPy/SiNTs nanocomposites. PPy/SiNTs/Ag nanocomposites exhibited excellent chemical catalytic property in the reduction of methylene blue in the presence of sodium borohydride within few minutes.
( Tran Xuan Tin ),박성수,송시내,( Manwar Hussain ),김희택 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
Herein, we have demonstrated a facile and ultrafast technique to obtain carbon nanotubes (CNTs) growth on graphene oxide (GO) surface within just 10 s under ambient conditions via microwave assisted approach. The physicochemical characteristics of the hybrid materials were examined by field emission scanning electron microscope (FESEM), transmission spectroscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, and the mechanism formation was proposed. The obtained data indicated that GO/CNTs hybrid material decorated with silver nanoparticles exhibit good performance for hydrogen peroxide detection with the wide linear detection range of 0.1 to 100 mM, and detection limit of 1.5 μM (S/N ratio 3).
Tran, Tin Trung,Pham, Trung Xuan,Kim, Jong-Wook Institute of Embedded Engineering of Korea 2017 대한임베디드공학회논문지 Vol.12 No.2
One of the important applications of activity sensing in the home is energy monitoring. Many previous methodologies for detecting and recognizing household appliances have been proposed. This paper presents an approach that uses an energy metering circuit (EMC) to classify and identify the various electrical devices in home based on root-mean-square (RMS) consumed current value. EMC gathers the RMS current values created by appliance state transition (e.g., on to off) and apparatus operating process. In this paper, an identification algorithm is proposed to detect a change in current levels using the standard deviation of current signals and their average values. In addition, characteristic of the appliance is extracted concerning four feature parameters concerning the number of current levels, the minimum level, the maximum level, and signal-to-noise ratio (SNR) of them. Experiment results validate the reliable performance of the proposed identification method for 11 representative appliances.
Measurement of Current Magnitude for Home Appliances using Smart E-Meter
Tran Trung-Tin(트란 트렁 틴),Pham Xuan-Trung(팜 수안 트렁),Ngo Minh-Tri(능오 밍 트리),Jong-Wook Kim(김종욱) 한국정보기술학회 2015 Proceedings of KIIT Conference Vol.2015 No.6
본 논문은 Smart E-Meter를 이용해서 방안에 있는 가전제품의 전류 값을 관찰하고 측정하는 것이 가능한 데이터측정(DAQ) 시스템을 제안한다. 제안된 DAQ 시스템은 Smart E-Meter 장치를 사용하고 소프트웨어는 LabVIEW의 VISA 함수를 사용해서 설계되었다. 그리고 제안된 시스템으로 각 전자제품의 전류 변화를 데이터 파일로 만들 수 있으며, 최신 전류 데이터에 창을 씌워 전류의 이동평균과 이동표준편차를 계산함으로써 현재 연결되어 있는 가전제품이 가동 시작, 정상 운용, 모드 변화 중 어느 단계인지를 판단하게 할 수 있다. 제안된 시스템은 Smart E-Meter 시제품을 이용해서 실현 가능성을 검증받는다. This paper proposes a data acquisition (DAQ) system to observe and monitor the magnitude value of current signal for in-home appliances in a room based on Smart E-Meter. The DAQ system included DAQ device with Smart E-Meter and DAQ software designed by LabVIEW with the VISA function. In addition, this analysis tool produces the current profile of each electric appliances. Based on the profile, the moving average and moving standard deviation values are utilized to evaluate the current magnitude by sliding a window for most recent data. Specifically, consideration of the difference in current magnitude allows to determine the status of the connected appliances which are starting-up, working or adjusting operation mode. The proposed approach is validated through operating experiment with the prototype of Smart E-Meter.