Advanced Materials Research Vols. 1004-1005

Abstract: In this paper, a new diimine ligand of 2-(naphthalen-2-yl)-1-phenyl-1H-imidazo[4,5-f][1,10]phenanthroline(E2) and its corresponding CuI complex contain Bis[2-(diphenylphosphino)phenyl]ether were synthesized and characterized by 1H NMR successfully. Experimental data confirm that Complex [Cu(E2)(DPEphos)](PF6) is high-energy-emitting one. The broad band emission upon excitation at λ = 400 nm with the emission maximum locates at λ = 582 nm was observed. This makes them potential candidates as cheap emitting materials.

Abstract: Gas drilling technology have very distinct advantages, it can improve ROP greatly, shorten the drilling cycle, reduce drilling costs, but it's scope of application was greatly limited by the problems of formation water and wellbore stability. This project developed a kind of super-absorbent material which can absorb deionized water 1484 times,absorb 0.9% NaCl aqueous solution 687 times,absorb 50% ethanol 705 times, that can meet the water carrying requirements of gas drilling. it provides a new way of gas drilling to solve the water carry problem.

Abstract: The surface area and pore distribution of activated carbons (ACs) were characterized by nitrogen adsorption isotherms at 77 K, and double layer capacitors were assembled to demonstrate the electrochemical performance. With 1 mol·L^-1 tetraethylammonium tetrafluoroborate dissolved in acetonitrile (Et₄NBF₄/AN) as electrolyte, electrochemical methods including cyclic voltammetry (CV) and galvanostatic charge-discharge tests were used to evaluate the capacitors. Results show that the surface area has a limited effect on the specific capacitance of ACs and the increaing of mesoporous content can decrease the capacitance decay rate at large discharge current. When current increases from 0.15A·g^-1 to 9.6A·g^-1, the minimum specific capacitance decay rate of mesoporous ACs is 10.93%, while that of the microporous ACs is 15.21%;the contributions of mesoporous surface area to the specific capacitance drop from 10.10 to 9.95μF·cm^-2, while that of microporous surface area drop from 5.68 to 4.21μF·cm^-2.

Abstract: Iron sulfide-AC adsorbents were prepared and their mercury removal capabilities were evaluated in the simulated coal combustion flue gases. The FeS₂ has much higher mercury removal rate than AC although it has much lower BET surface area than AC. FeS₂ also shows higher mercury removal rate than FeS, which is probably due to its higher free sulfur content on the FeS₂. The mercury removal capability of AC modified FeS₂ decreases with increasing of AC content. Temperature programmed desorption/decomposition process (TPDD) shows FeS and FeS₂ have more desorption peak than AC and the main peaks of FeS and FeS₂ are at around 240°C. The desorption peaks of AC modified FeS₂ are shifted to the higher temperature compared with that of FeS₂ and more mercury compositions are desorbed by AC modified FeS₂.

Abstract: PANI conducting polymer coating was electrochemically deposited on 316L stainless steel bipolar plates of PEMFC in the bath of 0.5M H2SO4 and 0.5M aniline. PANI coating could be synthesized with optimal conditions presenting in smooth and dense feature when the voltage was from 0.75V to 0.85V(Vs.SCE). The anti-corrosion performance of the coating was evaluated by electrochemical technique in the medium of 1M H2SO4 and 2ppM NaF at 70°C to simulate the working environment of PEMFC. It was found that the anodic branch of polarization curves presented in passivation character. EIS results indicated that the radius of the capacity impedance for PANI coating increased distinctly, which validated the excellent corrosion resistance of the coating. The surface morphology of the coating was observed by SEM, and the results showed that the surface of 316L stainless steel bipolar plates was covered by claviform shape coating. The chemical composition of the coating was investigated by FTIR and the results illustrated that the coating were composed of PANI.

Abstract: Under the effect of an adjustable magnetic field (0-0.6T), porous silica gel was synthesized via sol-gel process by phase separation method to investigate the effect of magnetic field on the formation time of porous silica gel and the influence of porous silica gel synthesized under the induction of magnetic field (m-SiO₂) on Pb²⁺ adsorption property. The findings of this study show that the reaction rate can be increased and the gelation time shortened under the effect of magnetic field. Within the range of intensity of the magnetic field in this study, the 0.25T magnetic field affects the porous silica gel most significantly and can reduce the gelation time from 120min to 90min; the Pb²⁺ adsorption property of m-SiO₂ is better than that of ordinary silica gel (SiO₂); under the condition that the solid-to-liquid ratio and the pH value change, the Pb²⁺ equilibrium adsorption rate and equilibrium absorption capacity of silica gel synthesized with the 0.25T magnetic field, compared with ordinary silica gel (SiO₂), can averagely increase by 11.32% and 11.20mg/g, respectively.

Abstract: Homemade water in water cationic polyacrylamide (CPAM) emulsion was applied in cigarette paper pulp as dry strengthening agent with other strengthening agent. Good collaborative effect was achieved when CPAM was used in bleached wheat straw pulp with strengthening agent E and with cationic additives L as paper pulp strengthening agent. It was also showed that distinct strengthening effect was obtained when CPAM emulsion was applied in mixture of bleached needle kraft pulp (NBKP) and wheat straw pulp, breaking length and tearing index of cigarette handsheet made of mix pulp was respectively increased by 22.2% and17.0% when the dosage of CPAM was 0.8% of dry fiber. Through analysis of cigarette handsheet section scanning electron microscopy (SEM) photos, strengthening mechanism of CPAM emulsion to cigarette paper pulp was preliminary studied.

Abstract: Using widely distributed and cheap lignite as starting material, humic acid was modified by octadecylamine, and a new kind of humic acid acetamide was prepared. The optimal reaction conditions of the humic acid acetamide polymer were obtained through laboratory tests as follow: the ratio of of humic acid and octadecylamine was 1:1.5, the reaction temperature was 150 °C, and the reaction time was 16~18 h. The new product was characterized by IR, and the results showed that this substituted-ammonium humic acid was successfully prepared by reacting parts of carboxyl group of humic acid with octadecylamine. HTHP filtration experiments demonstrated that the substituted-ammonium humic acid had good fluid loss properties. As a result, this substituted-ammonium humic acid polymer is an excellent fluid loss additive, and it could meet the requirement of drilling operation under extreme condition.

Abstract: Methanol-water as solvent, transition metal Y-type zeolite as catalyst, L-lysine was synthesized laminin. Explores the methylation process factors, and the structure of the compound by IR, NMR and elemental analysis were characterized.

Abstract: For the thermal safety evaluation of energetic materials, the experimental devices, test method, conditions of determination, numerical calculation and simulation are listed in this paper on thermal explosion experiment both at home and abroad. By listing typical examples and comparing the existing researches, current study and developing trend of thermal explosion experiment are summarized and prospected.