Advanced Materials Research Vols. 1061-1062

Abstract: There is much fluorescence for impurities on the variation cashmere fiber surface; the characteristic of the Raman spectrum is not obvious. Based on the orthogonal principle, variation cashmere fiber is purified by soaking in different component water/organic solvents, and cleaning with ultrasonic wave. Through measuring and analyzing the Raman spectrum, we confirm the optimal organic solvent system, soaking time and temperature for the cleanse technology of variation cashmere. The result shows that, the variation cashmere fiber is soaked in diethyl ether/aqueous organic solvent in the optimal condition, the Raman spectrum appears good peak-area ratio, and we get cleanest variation cashmere fiber.

Abstract: In this paper, a novel anti-bacterial agent of Ag-deposited silica-coated Fe₃O₄ magnetic nanoparticles was prepared by a template-activated strategy, which possess a silica coated magnetic core and silver nanoparticles on the outer shell. The as-synthesized nanoparticles have been characterized by transmission electron microscopy (TEM), energy dispersive X-ray analysis (EDX). The obtained products exhibited dispersibility and high magnetization, which also show a good recycling antibacterial activity, and the antibacterial rates against Escherichia coli was all 100 % for 3 cycles.

Abstract: In this study, reactive processing of maleated polypropylene with different types of amine modifiers, including 1,12-diaminododecane, tetraethylenepentamine, p-phenylenediamine, and 1,6-diaminlhexane were carried out. The changes in melt viscosity, molecular weight and its distribution, as well as crystallization were measured and discussed. All the modified samples exhibited increased molecular weight and enhanced branching structure compared to the virgin maleated PP. Aniline modified sample exhibited the highest weight average molar mass., while polyamide-modified maleated PP showed the highest degree of branching. It was also noted that all of the amine-modified samples showed higher crystallization and melting temperatures than that of the unmodified sample.

Abstract: Machine production well scaling is one of the three components flooding oil technology industrialization main bottleneck problem. With the mining into the scaling in the late three, strong base ASP flooding produced liquid system formed under the condition of the molecular state scale. Preparation of calcium carbonate particles indoor system, by using a particle size analyzer to evaluate the ASP’s single agent on the growth of calcium carbonate particle effects, to investigate the molecular state scaling mechanism, the results show that the adsorption effect on package fouling mechanism and polymer into molecular state scale.

Abstract: Pineapple is widely planted as one of the four major crops in in south China. The handling of residual pineapple leaves is not a step for looking down upon after harvesting. So far, returning the residual on the filed is the popular method, compared to set the residual on fire, crushing and returning has distinct advantage on high-efficient and low-pollution. In the text, the technology and machine of crushing and returning is summarized, and the current problems is analyzed and discussed.

Abstract: Core-Shell structure Poly(vinyl acetate-butyl acrylate) emulsion is prepared by the semi-continuous emulsion polymerization. And the emulsion particles are modified by ethyleneglycol dimethacrylate crosslinker (EGDMA) to improve the properties of films in the different reaction stages. Then the emulsion particles structure is characterized by transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FT-IR). The particle size and distribution are characterized by Zata Potential- Particle analyzer, as well as analysis of the film mechanical properties and thermal performance. The results show that the emulsion particles possess a clear core-shell structure. The performance of the emulsion film show better when 1% and 0.5% EGDMA are added in the second reaction and the third reaction stage respectively under the emulsion preparation process.

Abstract: Nowadays, hydraulic fracturing has become the mainly treatment in low permeability reservoirs.Niudong buried-hill was located in the Baxian Sag of the Bohai Bay Basin. The charactristers of this natural reservoirs are summarized as :low porosity and ultra-low permeability ;complex storage types and complex fracture break and with ultra high temperature (200-210°C) ,In the past, 150°C fracturing fluid system was used in order to solve fluid fracturing efficiency low, quick acid rock reaction.Field test shown that it can’t meet target of greatly improve the output. So it is necessary to develop a novel fluid system to achieve high-efficient stimulation. Therefore, this paper invented a new high temperature resistant ternary anionic thickener, and launched some fracturing fluid performance evaluation.The novel high-temperature fracturing fliud provides a new material to stimulate ultra-high temperature, ultra deep formation to help maximize recovery efficiency. it has important strategic significance for exploration promotion of ultra-high reservoirs .

Abstract: In order to improve the moisture absorption of the acrylic yarn, the acrylic yarn was firstly hydrolyzed in the caustic soda (NaOH) solution to convert the cyano group molecular into hydrophilic group, then the reticulated coatings was formed on fiber surface by chemical crosslink. Furthermore, the effect of the acrylic hydrolysis temperature, NaOH dosage, ethanol, cross-linking agent (CLA) on acrylic affinity for moisture was discussed through the contrast experiments. The best experimental conditions were investigated by the orthogonal experiments, and the optimum process parameters were obtained. The results indicate that under the condition of NaOH concentration of 6%, hydrolysis time of 15 min, temperature of 80°C, and cross-linking agent concentration of 0.09% on weight the yarn (owf), the moisture regain of modified acrylic yarn has increased by 245.4% as compared with that of untreated acrylic yarn and the water absorption has been improved greatly.

Abstract: The new compounds F2 and C2 have been successfully synthesized via the Vilsmeier-Haack reaction, which were designed to construct D-A type organic conjugated molecules composed of central fluorene and carbazole donating units and two aldehyde terminal accepting groups. Optical properties of the resulting compounds were examined by UV-vis and fluorescence spectroscopies. The fluorescence spectra of F2 and C2 both exhibiting strong emission peaks in the blue light regions, are expected to be promising pure blue materials for organic light-emitting diodes applications.

Abstract: Novel donor-acceptor conjugated organic molecules composed of central fluorene and phenothiazine units and aldehyde terminal groups have been designed and constructed via the Vilsmeier-Haack reaction. Optical properties of the resulting molecules were examined by UV-vis and fluorescence spectroscopies. The fluorescence spectra of the molecules in the solid state show strong emission peaks in the violet, blue, cyan and green light regions. Thus, the molecules are expected to be promising light-emitting materials for organic light-emitting diodes applications.