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A New Model and Equation Derived From Surface Tension and Cohesive Energy Density of Coagulation Bath Solvents for Effective Precipitation Polymerization of Acrylonitrile
YouZhou, LiweiXue, KaiYi, LiZhang, SeungKonRyu, RiGuangJin 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2012, Vol.13 No.3 9 182-186 (5 pages)
the multi-dimensional direction in the precipitation polymerization. When the nascent monomer coagulates with another monomer, F(N) will be proportional to [N], as shown in the following equation. Fig. 1. Schematic model of surface tension interaction between monomers. Fig. 2. Model of liquid droplet coagulation. Fig. 3. Coagulation of monomers in precipitation polymerization. ..PAGE:3 Carbon... -
Kinetic and multi-parameter isotherm studies of picric acid removal from aqueous solutions by carboxylated multi-walled carbon nanotubes in the presence and absence of ultrasound
Soheila Gholitabar, Hasan Tahermansouri 한국탄소학회 Carbon Letters 11 Pages
한국탄소학회 Carbon Letters 2017, Vol.22 2 14-24 (11 pages)
fltration, chemical precipitation and ion exchange, is that it is generally easy to handle, can be regenerated by a suitable desorption process, is insensitivity to toxic DOI: http://dx.doi.org/ DOI:10.5714/CL.2017.22.014 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0/) which... the pseudo-second-order kinetic model for both methods. In addition, the adsorption isotherms of picric acid from aqueous solutions on the MWCNTs were investigated using six two-parameter models (Langmuir, Freundlich, Tempkin, Halsey, Harkins-Jura, Fowler- Guggenheim), four three-parameter models (Redlich-Peterson, Khan, Radke-Prausnitz, and Toth), two four-parameter equations (Fritz-Schlunder and Baudu) and one five-parameter equation (Fritz-Schlunder). Three error analysis methods, correlation... -
Experimental and Theoretical Investigations of PAN Molecular Weight Increase in Precipitation Polymerization as a Function of H2O/DMSO Ratio
Jing Zhang, Fengjing Bu, Yongqiang Dai, Liwei Xue, Zhixian Xu, Se 한국탄소학회 Carbon Letters 6 Pages
한국탄소학회 Carbon Letters 2010, Vol.11 No.1 4 22-27 (6 pages)
the nascent precipitation particle, and following hypothesis can be suggested. F(P) is the number of aggregated monomers in multi-dimensional direction in precipitation polymerization. When the nascent particle aggregated with other one particle, F(P) will be proportional to [P] showing the following equation. (3) Where, F(P) is the number of aggregated monomers in multi-dimensional direction in... -
Detection of Clavibacter michiganensis subsp. michiganensis Assisted by Micro- Raman Spectroscopy under Laboratory Conditions
Moisé, s Roberto Vallejo Pé, rez, Hugo Ricardo Navarro Contreras, Jesú, s A. Sosa Herrera, José, Pablo Lara Á, vila 한국식물병리학회 The Plant Pathology Journal 12 Pages
한국식물병리학회 The Plant Pathology Journal 2018, 34권 5호 4 381-392 (12 pages)
al. (2003) trapezoid method. Tempera- ture and precipitation weather variables were monitored us- ing a Davis Vantage Pro2 (Davis Instruments, Hayward USA) weather station. Cmm isolation and molecular identification. The phy- tosanitary analysis was performed on all plants than con- formed the experiment at 14 weeks of age to determine the presence of Cmm in plants vascular tissue. The procedure... Clavibacter michiganensis subsp. michiganesis (Cmm) is a quarantine-worthy pest in México. The implementation and validation of new technologies is necessary to reduce the time for bacterial detection in laboratory conditions and Raman spectroscopy is an ambitious technology that has all of the features needed to characterize and identify bacteria. Under controlled conditions a contagion process was induced with Cmm, the disease epidemiology was monitored. Micro-Raman spectroscopy (532 nm... -
Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning
Yong-Mun Choi, in Jung Jun Yeon, Hwang Seung Min, Kim Hyeonsu Jeong, Bon-Cheol Ku, Munju Goh 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 1 223-232 (10 pages)
A centrifugation or precipitation process is necessary to classify them by size. Polymer wrapping is another method used to fabricate liquid crystalline CNTs. The process enables CNTs to be dispersed ef- fectively in solvents without damage because the polymer al- lows them to disperse as individual units. A number of polymers have been investigated for the polymer wrapping method, such as... This review presents current progress in the preparation methods of liquid crystalline nanocarbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide. -
Carbon-allotropes: synthesis methods, applications and future perspectives
P. S. Karthik, A. L. Himaja and Surya Prakash Singh 한국탄소학회 Carbon Letters 19 Pages
한국탄소학회 Carbon Letters 2014, Vol.15 No.4 1 219-237 (19 pages)
chips combusted in the presence of air, combined with carbo- naceous aggregates. Graphitic particulates were formed by the combustion of Tex as pinon pine wood chips. Thermophoretic precipitation [52] was used to collect the smoke while the wood was combusting. High volume of air sampler was also employed fbre glass flters for PM10 and PM2.5 to separate matter by size in the ranges of <10 m... The element carbon has been used as a source of energy for the past few hundred years, and now in this era of technology, carbon has played a significant and very prominent role in almost all fields of science and technology. So as an honour to this marvellous element, we humans should know about its various forms of existence. In this review article, we shed light on all possible carbon-allotropes; similarities in their synthesis techniques and the starting materials; their wide range of... -
Synthesis of well-aligned thin multiwalled carbon nanotubes on the silicon substrate and their field emission properties
HuajunYuan, DongHoonShin, BawlKimandCheolJinLee 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2011, Vol.12 No.4 4 218-222 (5 pages)
flaments by the foating catalyst method and in enhancing the productivity of carbon fbers [27,28]. Low coverage of sulfur in the metal surface layers may favor carbon-carbon bond rupture and precipitation of the carbon flament [28]. Our experiments showed that optimal amounts of H 2S additive are necessary to increase the growth rate of MWCNTs and to produce the well- aligned CNTs. In our... -
Temperature and pH-Responsive Release Behavior of PVA/ PAAc/PNIPAAm/MWCNTs Nanocomposite Hydrogels
GowunJung, JumiYun, Hyung-IlKim 한국탄소학회 Carbon Letters 5 Pages
한국탄소학회 Carbon Letters 2012, Vol.13 No.3 7 173-177 (5 pages)
Precipitation Polymerization of AN By Changing Solution Composition and Temperature Weiwei Liu, Shuangkun Zhang, Jing Wang, Seung Kon Ryu and Ri-guang Jin Fabrication and Cell Culturing on Carbon Nanofbers/Nanoparticles Reinforced Membranes for Bone-Tissue Regeneration Xu Liang Deng and Xiao Ping Yang KCS Korean Carbon Society carbonlett.org REVIEWS pISSN: 1976-4251 eISSN: 2233-4998 VOL. 13 NO. 3... -
기후변화 대응을 위한 경안천 유역의 홍수저감 대안 선정
한대건, 최창현, 김덕환, 정재원, 김정욱, 김수전 한국습지학회 한국습지학회지 12 Pages
한국습지학회 한국습지학회지 2016, Vol.18 No.2 5 154-165 (12 pages)
Streamflow for the Daechung Dam Watershed, J. of Korea Water Resources Association, 37(4), pp. 305~314. [Korean Literature] Kyoung, MS(2010), Assessment of Climate Change Effect on Standardized Precipitation Index and Frequency Based Precipitation, Ph.D. Dissertation, INHA University. [Korean Literature] Kim, YS, Kim, SJ, Kwak, JW, Kim HS(2012), Estimation of Frequency Based Snowfall Depth... 최근 기후변화로 인하여 태풍 및 집중호우로 인한 극한 강우사상의 발생빈도가 증가하고 있으며, 급격한 도시화로 인한 유역 내 불투수 면적이 늘어나고 있다. 이로 인해 재산피해가 증가하고 있어 기후변화를 고려한 미래 하천범람 등 홍수피해를 경감시키기 위한 홍수저감 대안 선정이 필요하다. 따라서 본 연구에서는 기후변화를 고려하여 목표기간별로(기준년도 : 1971∼2010년, 목표기간Ⅰ : 2011∼2040년, 목표기간Ⅱ : 2041∼2070년, 목표기간Ⅲ : 2071∼2100년) HEC-HMS모형 을 이용하여 기후변화에 따른 홍수량을 산정하였다....