Advanced Materials Research Vols. 1079-1080

Abstract: The adsorbent of H₈Nb₂₂O₅₉·8H₂O and the precursor of Rb₈Nb₂₂O₅₉ were characterized by X-ray diffraction (XRD), Thermogravimetric and differential scanning calorimetry (TG-DSC), and scanning electron microscope (SEM). The ion-exchange properties of H₈Nb₂₂O₅₉·8H₂O for Na⁺ and K⁺ were also investigated, including the saturation adsorptive capacity, distribution coefficients and separation factor. The results show that the crystallinity of Rb₈Nb₂₂O₅₉ was affected by the calcination temperature. The structure of Rb₈Nb₂₂O₅₉ was not changed when Rb⁺ was extracted from Rb₈Nb₂₂O₅₉, indicating that this process was topotactical. The calcination temperature and pH value had a significant influence on the ion-exchange capacities of H₈Nb₂₂O₅₉·8H₂O for Na⁺ and K⁺. Specifically, the uptake amouts of Na⁺ and K⁺ by H₈Nb₂₂O₅₉·8H₂O increased with the calcination temperature, while the distribution coefficients of Na⁺ and K⁺ for H₈Nb₂₂O₅₉·8H₂O increased with the pH value. Moreover, the separation factors for K⁺ was larger than that for Na⁺ and it increased with the increase of calcination temperature. Overall, the improvement of the crystallinity of H₈Nb₂₂O₅₉·8H₂O was beneficial to its selectivity for K⁺.

Abstract: Aluminum strips were subjected to a new complex KOBO deformation process, comprising joined operations of rolling, compression and extrusion within a single act (pass) under the conditions of cyclic changes of the deformation path. Tensile tests of strips deformed in this way have revealed their potential for attaining high strength properties. Electronomicroscopic observations show that the strips consist of well-recovered ~ 1μm subgrains with a low dislocation density.Clusters of point defects – the presence of which in products obtained through „cold” extrusion by the KOBO method is considered as the reason for the high mechanical properties of metals and alloys [1,2] - were not identified.

Abstract: Furniture with people's lives, but furniture is a combination of furniture components, in addition to solid wood, other furniture parts are pressed together by a variety of plates, environmentally friendly water-based isocyanate adhesive by furniture manufacturing loves. Waterborne isocyanate adhesive using toluene diisocyanate (TDI) crosslinked polyvinyl alcohol (PVA) chemical reaction processes and reactants properties, good water resistance polyvinyl alcohol emulsion preparation, room temperature curing, water-resistant, resistant to moisture and good bonding high-intensity environment-friendly wood adhesives.

Abstract: Currently, there is a strong need of high-performance and environment-friendly paving materials in Russian Federation. Sulfur dumps near the oil industry enterprises consumes area which otherwise could be occupied by vegetation, contributing to the improvement of the environmental situation. Incorporation of sulfur in bulk building materials contributes to decrease of load to the environment. The results of numerous studies of sulfur-extended asphalt concretes are summarized in the present work. For the suppression of hydrogen sulfide and sulfur dioxide we propose to use the complex nanoscale modifier. The application of such modifier leads to several positive effects. Both amount of sulfur in constructional mix and mobility of the mix can be increased. The values of operational properties, notably compressive strength and resistance to rutting, can also be increased. Due to consumption of industrial by-product, the environmental load decreases in regions near the oil and gas industry enterprises.

Abstract: In this paper, ultrafine alumina powder was prepared by Ammonia PrecipitationMethod used Al(NO₃)₃·9H₂O as aluminum source. The effects of synthesizing temperature,compounds reaction time on phase formation,morphology particlesizes were investigated. The results shows thatγ-Al₂O₃ can be prepared at 900°C for 2h by the Al₂O₃ precursor using AmmoniaPrecipitation Method. And α-Al₂O₃ with stable crystal structure can be got at 1100°C for 2h.

Abstract: Two containing nitrogen diamine monomer, 2-(4-aminophenyl)-5-aminopyrimidine (PAPRM) and 2,5-two(dimethyl amino methylene)-1,4-((paraamino) phenyl)benzene(DMAPB), was synthesized. The corresponding copolyimide containing 40–80 mol % PAPRM and DMAPB were prepared. The copolymers showed excellent solubility and good film-forming capability. Most of the SPI membranes were both tough and flexible and thermally stable up to 330 °C.With increasing content of the nitrogen atoms, water uptake of membranes and dimensional changes also remarkable decrease. Compared with the main chains containing nitrogen atoms, the side chains type displayed excellent water stability and good mechanical properties.

Abstract: Pangang Group developedproduction process of low cost medium-Ti Q345B. And the influence of N content on the precipitation of Ti wasresearched. Theoretically, the optimum N contentfor medium-Ti Q345B should be within 50ppm. Thenindustrial production of Q345B with two different N contents was carried out. The results implicated that the microstructure,yield strength and elongation of Q345B metthe requirements when N content waswithin 50ppm; and when N content wentbeyond 50ppm, trace of bainite microstructure appeared, theelongation was close to the lowerlimit, and microscale TiN were observed inlarge amout under SEM.

Abstract: The emergence of plasma surface treatment technology, not only improved the product performance, increase the production efficiency, with the rapid development of high-tech industries. This paper mainly introduces the principle of plasma surface modification, and emphatically expounds the plasma surface treatment technology in process industry and important application in the field of medical treatment.

Abstract: Reclaim of large amounts of nitrogen oxides wasstudied which was produced in the production process of adipate in ChongqingChemical Industry Co. Ltd. The waste gas first was cooled, then into theabsorption tower through the compressor, most of the nitrous gas was absorbedout in the form of nitric acid after treated by three absorption towers. Weresearched gas composition at the gateway of recycling equipment by gaschromatograph, and which showed that all NO, NO₂and nitric acid gas werealmost absorbed out, while N₂O without being absorbed was eventuallyemissions into the atmosphere at the allowed concentration range. The research resultsshowed that could recycle 33,000 tons of nitric acid and saved 60 million yuan RMBfor the company every year after treating by the recycling equipment, whichfully embodied the economic value and environmental significance, and put out anew target of treating nitrous oxide gas.

Abstract: Using the pulse excitation method, the elastic modulus of resin carbon was measured with different carbonization temperature. Micro structure of resin carbon was analyzed by XRD. Porosity, bulk density and true density of resin carbon was measured and calculated. The results show that the elastic modulus of resin carbon is 2.51GPa under 700°C carbonized, and is 2.92GPa under 1300°C carbonized. From 700°C to 1300°C, the elastic modulus of the resin carbon increases firstly and then decreases. The XRD analysis shows the crystal structure of resin carbon tends to regularization with the increase of carbonization temperature. The porosity of resin carbon is 14.% under 700°C carbonized, and is 13.38% under 1300°C carbonized. Considering XRD and porosity, the rise of elastic modulus of resin carbon from 700°C to 1000°C attributes to the incomplete pyrolysis of resin, reduction attributes to the graphitization of resin carbon from 1000°C to 1300°C.