Advanced Materials Research Vol. 1048

Abstract: Electron beam irradiation grafting of acryl acid (AAc)/acrylamide (AAm) onto poly-(ethylene terephthalate) (PET) fabrics was performed using a high-energy electron accelerator. Parameters affecting the graft polymerization of PET fabrics, including composite of mixture monomer, monomer concentration radiation dose and, concentration of inhibitor were investigated. The thermal behavior of the grafted PET fabrics was investigated with thermogravimetric analysis. Findings showed that grafting with AAc/AAm could improve the thermal stability of PET.

Abstract: Electrospun membrane filters used to remove particles from hot gases were highly desired to meet the requirement of application in high temperature. Polyimide is a kind of high performance polymer, especially for excellent thermal stability and chemical resistance. In this paper, the polyimide precursor poly (amic acid) (PAA) was synthesized from 3,3’,4,4’-oxydiphthalic anhydride (ODPA) and 4,4’-methylenedianiline (MDA), the polyimide (PI) ultrathin fiber membrane was fabricated by electrospinning and followed by thermal imidization. Scanning electron microscope (SEM), infrared spectrometry (IR), and thermogravimetric analysis (TGA) were used for the characterizations of the polyimide ultrathin fiber Membrane, the tests show that the diameter of ultrathin fiber is uniform with an average size of around 400nm and the membrane is thermally stable at a high temperature of 500°C.

Abstract: Melt-blown nonwoven fabric is a kind of excellent fiber filter media in the field of air filtration, which has the characteristics of high specific surface area, small pore size, high porosity, superfine fiber, low pressure drop and high filtration efficiency. In this paper, the microstructure characteristics of pore diameter and pore size distribution of polypropylene melt-blown nonwoven, and the relationship of micropore structure and filtration characteristics, continuous dust holding test were studies by using instruments of Microscope, Capillary Flow Porometer and TSI 8130 Auto Filter Tester.

Abstract: In this paper, the experimental of pore diameter distribution characteristics of spunbond and meltblown composite nonwoven is carried out by using of gas bubble method. The influence of 7 kinds of wetting liquid to measurement results is studied, including of Galwick, Porefil, Silpore, Silwick, Dimethyl silicone, Isopropanol and Alcohol. The results show that wetting liquids of Galwick, Silwick and Dimethyl silicone can obtain the consistent value of pore diameter, meanwhile, have nearly normal distribution characteristics of pore diameter. Therefore, the wetting liquids of Galwick, Silwick and Dimethyl silicone are ideal wetting liquid for nonwoven. While the other four kinds of wetting liquid measurement results vary greatly, and don’t show normal distribution, they are not suitable as the wetting liquid of nonwoven by gas bubble method.

Abstract: The composition of dyeing wastewater is complicated, after biochemical treatment, the effluent COD is still unable to meet the emission standard. To achieve discharge standard that often require advanced treatment after biochemical. This paper investigated effect of pH, reaction time, ZnO dosage, dosage of H₂O₂ on the effect of dyeing wastewater treatment by photocatalytic-H₂O₂, the results showed that the reaction time of 15 min, pH of 4, dosage of ZnO was 4 g/L, 30% H₂O₂ dosage was 1 ml/L, the COD removal rate was highest, can reach more than 55%.

Abstract: Printing and dyeing wastewater contained difficult biochemical degradation of organic matters. It required advanced treatment after the biochemical treatment. In this paper, effeccts of pH, the amount of iron and hydrogen peroxide, the ratio of iron and hydrogen peroxide and reaction time on the Fe⁰-H₂O₂ system were studied. The results showed that all the above factors were important to dyeing waste water treatment by Fe⁰-H₂O₂ system. COD_Cr removal efficiency could archive 65% when the initial pH was 3, the iron powder capacity was 1.5g/L,the volume of hydrogen peroxide was 1ml/L, the reaction time was 40 min and the temperature was 30°C.

Abstract: The macroporous resin is one kind of new non-ionic organic high polymer absorbent with nearly 20 years development. It takes the styrene and the acrylic ester as the monomer, divinyl benzene as the crosslinking agent, the toluene and the xylene as aperture reagents. They intersectantly linked the polymerization to form the porous skeleton structure mutually. This experiment is the utilization of aerosol polymerization method in preparation of rhenium concerned polymeric adsorbent. On research of monomer and crosslinking agent allocated proportion, dispersing agent amount used, temperature and mixing speed control, the different monomer and the crosslinking agent separately affected the synthesis different macroporous polymeric adsorbent. Also we investigated the adsorption performance quality of the different macroporous polymeric adsorbent in order to make the best particle size.

Abstract: A cleaning process for dyeing apparatus was investigated by employed a self-developed supercritical equipment. The solubility of C.I. Disperse Red 167 was evaluated with acetone, ethanol and carbinol in supercritical carbon dioxide at temperatures of 60, 80,100 and 120 °C and pressures ranging from 12 to 28 MPa. As revealed from the experimental results, the optimal cleaning conditions were as follows: cleaning temperature 100 °C, cleaning pressure 18 MPa, and cleaning time 40 min. Acetone was the most suitable cosolvent and the best cleaning effect was obtained when its concentration was 1%.

Abstract: We propose a new simple but effective method for building Tibetan-Chinese machine Translation corpus and a novel Tibetan-Chinese Machine Translation model integrating Tibetan syntactic cues which is based on the Treebank, this model can be used on the system of Tibetan-Chinese Machine Translation successfully . Keywords: syntactic Treebank; Tibetan syntactic cues ; Machine Translation;

Abstract: GA (Genetic algorithm) is an optimization method based on operators (mutation and crossover) utilizing a survival of the fittest idea. They are utilized favorably in various problems. (TSP) Travelling salesman problem is one of the famous studied. TSP is a permutation problem in which the aim is to determine the shortest tour between n different points (cities), otherwise, the problem aims to find a route covering all cities where that the total distance is minimal. In this study a single salesman travels to each of the cities and close the loop by returning to the city he started, the aim of this study is to determine the minimum number of generations in which salesman does the minimum path, cities are chosen at random as initial population. The new generations are then created iteratively till the proper path is attained.