摘要：
In this work, hydrogel beads with 3D network structure were successfully prepared using montmorillonite nanosheets (MMTNS) combined with macromolecule polymers. Batch adsorption tests revealed that the increase in exfoliation degree of MMTNS was beneficial to improve the methylene blue (MB) adsorption on hydrogel beads (HB). In addition, the HB with 25 % MMTNS-3 dosage achieved high mechanical strength and reached the maximum adsorption capacity of 543.1 mg/g. Effects of MB concentration (40-120 mg/L), adsorbent dosage (1-1.5 g) and flow rate (5-15 mL/min) on fixed -bed column adsorption indicated that the HB column exhibited an excellent dynamic adsorption performance and recycling performance, much better than the D113 resin. The good fits of Pseudo -first -order model and Pseudo -second -order model and a better Langmuir model fitting result implied a monolayer chemical adsorption and physical adsorption nature of MB on HB. Moreover, scanning electron microscope combined with the energy dispersive spectrometer, fourier transform infrared spectroscope and X-ray photoelectron spectroscopy measurements indicated that the adsorption mechanism was mainly attributed to Ca ion -exchange and chemical bonding of -COOH and -OH groups with MB. Such hydrogel beads showed a good potential in the application of practical wastewater treatment.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
Rice straw was employed to prepare microcrystalline cellulose (MCC). First, crude cellulose was isolated from rice straw using organosolv fractionation in the presence of mixed solvent composed of ethanol and H2O. Most hemicellulose and lignin were removed while little silica was not. Second, crude cellulose was bleached in Na2CO3/H2O2 mixed solution to remove residual silica as well as small amount of hemicellulose and lignin. After that, the removal rates of hemicellulose, lignin and silica reached up 91.5, 92.8 and 97.9%, respectively. Cellulose from rice straw was further converted into MCC in the presence of hydrochloric acid aqueous solution, and the cellulose content reached up to 92.4% in MCC. Infrared spectrometer (IR) and X-ray diffractometer (XRD) were used to characterize the structure of rice straw and its derived samples.
摘要：
Urethane-based polymers are very biocompatible in many biomedical applications. This study reports the synthesis of new low viscosity urethane dimethacrylates and evaluation of the formed composites. New urethane dimethacrylates were synthesized and formulated to form the composites. Compressive strength was used as a primary tool to evaluate the mechanical property. Water sorption, solubility, degree of conversion, flexural strengths and shrinkage were also investigated. It was found that liquid urethane dimethacrylates could be synthesized by derivatizing isocyanates with asymmetrical methacrylates. By eliminating diluent triethylene glycol dimethacrylate, the new urethane dimethacrylate-composed composites showed significantly higher modulus, lower water sorption, lower solubility and lower shrinkage, as compared to commercial BisGMA- and UDMA-based ones.
摘要：
Copper phthalocyanine (CuPc) was supported on MCM-41 mesoporous molecular sieves by impregnation to prepare CuPc-MCM catalyst which is used in oxidation of adrenaline (AD), and the catalytic efficiency was evaluated by UV-Vis spectroscopic analysis. The influence factors of catalytic efficiency, such as reaction time and temperature, the pH value of solution and the amount of catalyst, have been investigated. The results indicated that AD could be effectively catalyzed by CuPc-MCM.
摘要：
The inhibitive action of extract from mint leaves(EML) on Q235 A hot rolled carbon steel(HRCS) in 0.5mol/L H2SO4 solution was studied using weight loss measurement, electrochemical polarization and sc
摘要：
The genetically modified (GM) crops have been extensively reported in recent years, numerous transgenic products without being labeled as transgenic product have thrown into the market. In this paper, the genomic DNA of corn products was extracted and detected by using modified CTAB and polymerase chain reaction (PCR) methods respectively. Another, corn samples were detected to explore whether or not transgenic ingredients by using specific endogenous gene IVR of the corn as internal parameter, and Cauliflower mosaic virus (CaMV) 35S promoter and nopaline synthase (NOS) terminator as target genes. The experimental results indicate that some corn samples contain transgenic ingredients, and its products without being marked as transgenic product in market.
摘要：
Acyclovir-loaded PAN/PVP composite nanofibers were prepared using co-dissolving methods and electrospinning processes. N, N-Dimethylacetamide was selected as the co-dissolving solvent of PAN, PVP and acyclovir. Compared with acyclovir-loaded PAN nanofibers, the acyclovir-loaded PAN/PVP composite nanofibers exhibited more uniform structure and homogenous drug distributions, which was indicated by the polarized microscopy images. XRD and FTIR results demonstrated that the presence of PVP in the drug-loaded nanofibers increased the compatibility between the drug and the polymer matrix and resulted in the amorphous acyclovir status through the hydrogen bonding and hydrophobic interactions among the components. In vitro dissolution tests showed that the acyclovir-loaded PAN/PVP composite nanofibers could provide better drug controlled release profiles with less initial drug release burst effect, bigger percentage drug free out and relatively long time drug release time periods. Composite nanofibers with hydrophilic polymer PVP and PAN could improve their drug-loaded capability, drug controlled release profiles and their microstructure uniformity.
摘要：
The PVP/Fe3O4/TBT composite nanofibers have been successfully fabricated via a facile electrospinning assisted sol-gel process, and magnetic TiO2 hollow nanofibers are obtained by the calcination process. The effects of TBT and Fe3O4 dosage on the morphologies and hollow structure of nanofibers are systematically investigated. Scanning electron microscopy (SEM) demonstrated that the magnetic TiO2 nanofibers had a hollow structure with the average diameter of 200 nm. XRD results exhibited that magnetic TiO2 hollow nanofibers with well crystallized anatase phase were obtained. Both the hollow structure and well crystallized anatase phase of TiO2 nanofibers play very important role in photocatalytic activity. Moreover, the magnetic test demonstrated TiO2 hollow nanofibers possessed an excellent magnetic responsiveness, which facilitated the separation of TiO2 hollow nanofibers.
摘要：
The charged nano-Al2O3 particles were successfully prepared by sol-gel method, and different approaches including scanning electron microscope, X-ray diffraction and Fourier transforms infrared spectrometry were used to characterize the Al2O3 nanoparticles. Meanwhile, the zeta potentials of Al2O3 nanoparticles were thoroughly investigated in this paper. The analysis results indicated that the prepared Al2O3 nanoparticles were found spherical in shape and demonstrated weak agglomeration. They had a fine crystal phase with a mean size of about 13.2nm. The analysis of Zeta potential demonstrated that the Al2O3 nanoparticles had a positive charge.
关键词：
Benefit;Cleaner production;Practice;Waste paper
摘要：
Cleaner production is one of sustainable development approaches for wastepaper papermaking industry. Current situation of a wastepaper papermaking enterprise was analyzed, and it showed that the unit product energy consumption, pollutant generation had large cleaner production potential. 16 cleaner production solutions were generated through material balance analysis, advanced technologies collection, experts consultation and other ways. After the plans were carried out, 7.83% of pollutants were cut down, 7.62% of energy was saved, 1.57% of waste paper was reduced, 1.68% of dry fiber raw material was decreased, and 8.80% of reused industrial water increased equally. Cleaner production was an effective way for wastepaper papermaking industry to save energy, reduce energy consumption, reduce pollution, and increase benefit.
摘要：
Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.
关键词：
Diaphragm valve large-sized bag filter jetting performance
摘要：
The diaphragm valve is the key component of the deashing device in a pulse bag filter. It affects the investment cost, operation cost and the floor area, as well as the wide application of the dust removers on jetting performance directly. The development of a low pressure valve with a diameter of 100 was optimized by orthogonal test. The large-sized low-pressure diaphragm valve with the jetting and technical economic performance has been widespread used in market, it was better than small-sized one by parameter comparison between another similar one, the valve body resistance is decreased with the rise of diameter.
会议名称：
14th International Conference on Electronic Packaging Technology (ICEPT)
会议时间：
AUG 11-14, 2013
会议地点：
Chinese Inst Elect, Dalian, PEOPLES R CHINA
会议主办单位：
Chinese Inst Elect
关键词：
radio frequency identification;anisotropic conductive paste;flip-chip;reliability
摘要：
In this work, an ACP was prepared and applied in the packaging of the RFID tag inlays through flip-chip bonding process. The shear strength, the radio frequency performances (Resonance Frequency and Scattering parameters--S11) before and after the aging tests (high humidity and temperature test, 85 degrees C, RH 85%) and the Maximum Read Distance of the prepared RFID tag inlays were used to evaluate their reliabilities. And the results were compared with those of RFID tag inlays packaged with a commercial ACP under the same bonding conditions. It was found that the radio frequency performance of the High Frequency RFID tag inlays packaged with the ACP prepared here and the commercial ACP, almost were identical and remained unchanged after the aging test. And the shear strengths of them both increased after the aging test. It was revealed that the ACP prepared here has the same performance of the commercial product. The prepared ACP maybe performed better than the commercial product from the relationships between the maximum read distances of the UtraHigh Frequency RFID tag inlays and the aging hours. It can be concluded that the preapared ACP can be applied in the RFID tag inlays assembling industry. It is another choice for the RFID tag manufactures. And this test system can also be used to evaluate the reliability of the RFID tag inlays.
摘要：
To be able to predict tribological properties of new lubricant additives as well as clarify lubricating mechanisms, one needs to study the relationship between structures of lubricant additives and their lubricating properties. With a focus on estimating antiwear properties of some heterocyclic additives, we use the quantitative structure tribo-ability relationship (QSTR) model to predict tribological data, which introduces the idea of computer-aided design into tribology. This is combined with back propagation neural network (BPNN), a machine-learning method that offers simplicity and robustness. This study determined the feasibility and predictability of developing the BPNN QSTR model to estimate lubricant additive antiwear properties. For 36 additives, 90 structural descriptors, such as octanol-water partition coefficient, quantum indices, 2D topological indices, and 3D Jurs descriptors, were included as BPNN inputs. Antiwear parameters include wear-scar diameters under three loads. Leave-one-out cross-validation was performed to evaluate accuracy and robustness of this BPNN QSTR model. We also evaluate the descriptor sensitivities, from which we can determine the effects of each descriptor and clarify wearing mechanisms. Given a positive assessment, this method warrants further development and validated integration with other tribological properties. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.
