Ren X.Y.,Wuhan University of Technology |
Ren X.Y.,Chambroad Chemical Industry Research Institute Co. |
Bai X.Q.,Wuhan University of Technology |
Yuan C.Q.,Wuhan University of Technology |
And 6 more authors.
RSC Advances | Year: 2015
Biofouling seriously affects the properties and service life of metal materials. A number of studies have shown that the initial bacterial attachment to the metal surface and the subsequent formation of biofilm are dependent on the surface characteristics of the substratum, including metal surface free energy, roughness and metallurgical features. In this study, a novel recombinant fusion protein, which consists of receptor binding domain protein (RBD), truncated protein fragment of MrpF and alkaline phosphatase (PhoA) domains, has been constructed in an attempt to increase the surface contact angle of stainless steel. It has been confirmed that RBD has a strong affinity to 304 stainless steel; the truncated protein fragment of MrpF has high hydrophobicity and anchoring features, which can improve the contact angle of the material surface, whilst PhoA is an effective detection tool to monitor the expression and secretion of fusion protein. Multiple assays including FTIR, XPS, SEM-EDS and contact angle measurement revealed the existence of nitrogen and sulfur elements, binding energy shifts of nitrogen, carbon and oxygen atoms, and new FTIR peaks in treated stainless steel samples with increased contact angles at about 50°, confirming that a new organic steel material has been produced responding to these surface property changes. Using novel recombinant peptides to react with steel could become a new technique to increase the surface contact angle of the stainless steel for diverse applications. © The Royal Society of Chemistry.
Zhang A.,Dalian University of Technology |
Hou K.,Chambroad Chemical Industry Research Institute Co. |
Duan H.,Dalian University of Technology |
Tan W.,Chambroad Chemical Industry Research Institute Co. |
And 3 more authors.
RSC Advances | Year: 2016
The zirconium-promoted hydrothermal synthesis of hierarchical porous carbons with ordered cubic mesostructures (Im3m) under acidic aqueous conditions was first presented using F127 as a template, pre-synthesized resol as carbon precursor, hydrochloric acid as catalyst and zirconium oxychloride as an assistant agent. The effects of the zirconium oxychloride assistant, acid concentration, hydrothermal treatment time and treatment conditions on the structural properties of the hierarchical porous carbons were investigated. The results indicate that the zirconium polyoxo oligomers in the acid synthesis solution can suppress the condensation of the resols at a moderate rate around the micelles of F127 to form mesosporous carbon. Under hydrothermal conditions, zirconium polyoxo oligomers could interact with the polyethylene (PEO) chains of F127 through hydrogen bonding, increasing the hydrophilic/hydrophobic volume ratio and the interfacial curvature to promote the phase transformation of the mesostructure from 2-D hexagonal to 3-D body-centered cubic. With suitable acid concentration (1.0-3.0 M), hierarchical porous carbons with ordered cubic mesostructures can be synthesized in 8 h on a large scale. After activation with KOH, the equilibrium CO2 adsorption capacities of the resulting materials at 1 atm were in the range of 3.3-4.1 mmol g-1 at 25°C and 4.8-6.6 mmol g-1 at 0°C. © The Royal Society of Chemistry 2016.
Shen K.,Dalian University of Technology |
Jiang Y.,Dalian University of Technology |
Liu Z.,Dalian University of Technology |
Qi D.,Dalian University of Technology |
And 3 more authors.
Macromolecular Chemistry and Physics | Year: 2015
A new method for visible-induced emulsion polymerization is successfully demonstrated. Photoinitiators are used upon irradiation with visible light to undergo sequential photodecomposition, demonstrating an effective way to generate radicals with octadecylamine ethoxylates N-oxide (AO-1805, EO = 5). AO-1805, acting both as a surfactant and mediator simultaneously, is proposed for free radical generation through synergistic effects with the photoinitiator, which differs greatly from organoboron compounds, especially in emulsions. Comparative experiments are carried out with nonylphenol ethoxylates (NP-10, EO = 5) upon irradiation with UV and visible light in order to examine the nature of the photoinitiated emulsion polymerization with AO-1805. The laser flash photolysis method is then used to study the interaction between AO-1805 and free radicals. The emulsion photopolymerization of styrene may be successfully mediated by AO-1805, with good control over molecular weight. A synergistic effect between radicals and AO-1805 is observed in the UV irradiation process that can further mediate radical polymerization. In visible light-induced emulsion polymerization, AO-1805 also has a novel stabilizing role because of the interaction between D1 and AO-1805. Moreover, it is hard to see such a trend with the NP-10/D1 combination, indicating that the functional group (N-oxide) of AO-1805 plays an important role in photoinitiation and has an influence on the overall polymerization rate. © 2015 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Guo N.,Ocean University of China |
Guo N.,China University of Petroleum - East China |
Yang C.,China University of Petroleum - East China |
Liu Z.,Chambroad Chemical Industry Research Institute Co. |
And 3 more authors.
Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | Year: 2015
The S2O8 2-/ZrO2-AC solid superacid catalyst was prepared by immersion precipitation method and the oxidative deep desulfurization of model fuel with DBT as model sulfur compound and dodecane as solvent (Sulfur mass fraction of 400 μg/g) was investigated with H2O2as oxidant catalyzed by S2O8 2-/ZrO2-AC. The structure of the prepared catalysts was characterized by means of BET, XRD, FTIR and NH3-TPD, respectively. The effects of oxidation temperature, reaction time, the amount of oxidant, the dosage of catalyst and Span60 on the desulfurization performance were also investigated. The results showed that the S2O8 2-/ZrO2-AC with ZrO2loading amount of 10% calcined at temperature of 650℃ had a good catalytic activity in oxidative desulfurization. Under the optimal conditions of oxidation temperature 60℃, reaction time 60 min, the molar ratio of the oxidant to sulfur 5, the catalyst dosage 0.04 g per mL model fuel and the dosage of Span60 0.1 g, DBT could be substantially converted to sulfone. After oxidation by using the extraction with dimethylformamide (DMF) as extractant and 1/4 volumetric ratio of DMF to model fuel, the sulfur removal efficiency and recovery of model fuel could reach 97.6% and 92.5%, respectively. The catalyst could be regenerated as well. © 2015, Editorial Office of Acta Petrolei Sinica. All right reserved.
Hou Y.-F.,China University of Petroleum - East China |
Liu M.,China University of Petroleum - East China |
Liu Z.-X.,Chambroad Chemical Industry Research Institute Co. |
Wang J.-F.,China University of Petroleum - East China |
And 2 more authors.
Xiandai Huagong/Modern Chemical Industry | Year: 2016
In order to further improve the desulfurization performance of ethyl cellulose (EC) membrane, acrylate monomer and EC polymer are used to synthesize crosslinked EC membrane. The membrane structure is characterized by IR spectroscopy and scanning electron microscopy. The model gasoline is used to evaluate the desulfurization performance. The effects of solid content, crosslinking agent content and temperature on the permeation flux and enrichment factor of the membrane are investigated. The results show that higher content of EC and crosslinking agent can make both the permeation flux and enrichment factor first increased and then decreased. There is a maximum value. Increasing the membrane-forming temperature and desulfurization temperature results in the increase of the permeation flux and the gradual decrease of the enrichment factor. On the basis of the results, the optimum conditions of desulfurization are suggested as follows: 18% mass fraction of the solid content, 21%-22% mass fraction of the crosslinking agent content, 50℃ of the membrane-forming temperature and 80℃ of the desulfurization temperature. © 2016, China National Chemical Information Center. All right reserved.
Wang F.,Zhengzhou University |
Li Y.,Zhengzhou University |
Li Y.,Chambroad Chemical Industry Research Institute Co. |
Ning Z.,Zhengzhou University |
And 2 more authors.
Journal of Chemical and Engineering Data | Year: 2016
To provide fundamental thermodynamic data for the crystallization separation of succinic acid and adipic acid from mixed dibasic acid, the solubilities of succinic acid in various mass fractions of the adipic acid + glutaric acid + acetone mixture and adipic acid in various mass fractions of the succinic acid + glutaric acid + acetone mixture were measured by the dynamic method at a temperature range of 277.85-327.95 K under atmospheric pressure. The results showed that the solubility of succinic acid in acetone increased with increasing mass fraction of adipic acid and glutaric acid in the mixed solvent at the same temperature. Similarly, the solubility of adipic acid in acetone increased with increasing mass fraction of succinic acid and glutaric acid in the mixed solvent at the same temperature. The ideal solution equation, Apelblat equation, λh equation, and nonrandom two-liquid (NRTL) equation were applied to correlate the experimental solubility data, which were all in good agreement with the four equations. © 2016 American Chemical Society.