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- 저자 : Tianxiang Zhao (검색결과 5 건)
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Tianxiang Sun,Kai Jin,Wei Wang,Wen Li,Tong Wang,Tengxun Yang,Jia Cheng,Zhipeng Zhao,Shougang Chen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.128 No.-
Here, a long-term anti-corrosive epoxy (EP) coating based on nano-hybrid filler was developed. The surfaceof graphene oxide (GO) was aminated with (3-aminopropyl) triethoxysilane (APTES), and then theporous covalent organic framework (COF) was in-situ grown on amino functionalized graphene oxide(FGO) nanosheets by Schiff-based reaction to prepare FGO-COF nanofillers. Different characterizationmethods proved the successful modification of GO nanosheets with COF particles. The excellent waterresistance of composite coatings was characterized through contact angle, adhesion, and water uptaketests. Transmission electron microscope (TEM) and molecular dynamics (MD) methods showed thatthe grafting of COF enhanced the dispersion and compatibility of GO in the coating. EIS measurements,salt spray analysis and cathodic delamination test indicated the significant improvements in the protectiveproperties of the composite coatings compared with pure EP coating. The low-frequency impedancemodulus of 1% FGO-COF composite coating reached higher than 6.8 109 Xcm2 after immersed in seawater for 60 days. In addition, the 1% FGO-COF composite coating performed only 34% delamination ratioafter 120 h cathodic delamination test.
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Yaoxuan Song,Tianxiang Gao,Na Song,Yongdong Zhou,Pengfei Li,Shujiang Zhao 한국유전학회 2017 Genes & Genomics Vol.39 No.11
Mitochondrial genome has been used to shed light on many fields of both basic and applied research, including the study of molecular evolution. The complete mitochondrial genome sequence of 17368 bp nucleotides from the Pleuronichthys lighti was determined. It was a circular double-stranded DNA molecule with identical set of 22 transfer RNA genes, 2 ribosomal RNA genes, 13 proteincoding genes as well as a non-coding control region. Stand asymmetry in the nucleotide composition was reflected in the codon usage of genes oriented in opposite directions. In the control region, we identified the extended termination associated sequence domain, the central conserved sequence block domain and the conserved sequence block domain, and two complete repeat region. They were “TTA CAA TA” and “TGT TGT AA”, respectively. All known 12 mitochondrial genomes of Pleuronectinae fishes were downloaded and analyzed; there were 5570 variable sites in the consensus sequences of 15241 base pairs, calculation of total sites were 35.5%. The highest sequence divergence was 50% (ATP8) and the Kimura-2-parameter genetic distance was 0.235 (ND6), whereas the COIII had the lowest sequence divergence (28.8%) and genetic distance (0.128); the protein coding genes were mainly acted by purifying selection which was detected by selection tests. Analysis of confidence and the information content for per nucleotide revealed ND5, ATP6, COI and ND4 genes were suitable molecular markers for phylogenetic study of Pleuronectinae fishes. Phylogenetic analysis using Bayesian computational algorithms based on COI genes provided support for the taxonomic status of P. lighti, which was consistent with the traditional taxonomy.
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A novel CCU approach of CO2 by the system 1,2-ethylenediamine+1,2-ethylene glycol
Jianbin Zhang,Bo Guo,Tianxiang Zhao,Feng Sha,Fei Zhang,Qiang Li 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.6
As a new, effective CO2 fixation system, 1,2-ethylenediamine and 1,2-ethylene glycol (EDA+EG) can efficiently activate CO2 and directly convert it into a novel CO2-storage material (CO2SM) with 46.3% yield. The aqueous CO2SM solution can react with Ca(OH)2-saturated limpid solution to generate morphology-controllable CaCO3 microparticles with additional CO2 bubbling and Ca(OH)2. Additionally, the aqueous EDA+EG solution could be recycled multiple times without significant loss of CO2 capturing and releasing capabilities.
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Rapid Preparation of Ultrafine BaSO3 by SO2 Storage Material
Fei Zhang,Feng Sha,Xianshu Qiao,Tianxiang Zhao,Bo Guo,Jianbin Zhang 대한화학회 2017 Bulletin of the Korean Chemical Society Vol.38 No.1
In this work, a green and efficient process was developed for the preparation of ultrafine BaSO3 with layered nanostructure surface via the reaction of BaCl2 with a SO2 storage material (SO2SM) at room temperature. The absorption of SO2 with equimolar ethylenediamine (EDA) and ethylene glycol (EG) afforded SO2SM, which not only offered alkyl sulfite but also released EDA and EG that served as efficient surfactants to promote the formation of BaSO3 with spherical morphology and porous structure in the process of synthesis of ultrafine BaSO3. The factors affecting the morphology and size of BaSO3 particle were assessed by investigating the effects of SO2SM concentration, BaCl2 concentration, stirring time and speed. It was found that a higher SO2SM concentration led to a higher degree of supersaturation, and the particle size of BaSO3 could be reduced by increasing SO2SM concentration. Moreover, under the identified optimal reaction conditions, ultrafine BaSO3 was obtained with an average diameter of 450 nm. In addition, a plausible formation process of BaSO3 was proposed to explain the observed reaction results. Overall, the developed process in this work provides an efficient method for the capture, utilization, and conversion of SO2 into a valuable chemical.
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Yan Chang,Jianbin Zhang,Qiang Li,Lihua Li,Bo Guo,Tianxiang Zhao 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.12
Liquid densities and viscosities are reported for the binary system of 1,2-ethanediamine (EDA)+triethyleneglycol (TEG) at T=(298.15, 303.15, 308.15, and 313.15) K. Densities were measured using a capillary pycnometerand viscosities were determined using an Ubbelohde capillary viscometer. The experimental results are compared withdata published in the literatures. Based on the density data and kinematic viscosity data, excess molar volumes (VmE)and deviation in kinematic viscosity (Δν) were calculated and the calculated results were fitted to a Redlich-Kister equa-tion to obtain the coefficients and estimate the standard deviations between the experimental and calculated quantities. The values of VmEare negative in the whole composition range, whereas the values of Δν are positive over the majorcomposition range. From kinematic viscosity data, Gibbs energies of activation of viscous flow (ΔG*), enthalpy of ac-tivation for viscous flow (ΔH*), and entropy of activation for the viscous flow (ΔS*) were also calculated.
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