Advanced Materials Research Vols. 535-537

Abstract: The flow of the hydrogen has played an important role in the heat exchange in the inner bell. In this research, we have studied the volume distribution of the hydrogen in the inner bell through numerical simulation method, and we get the volume distribution law of the hydrogen when we change the axial angle and the tangential angle of the velocity of the hydrogen flowing into the inner bell while we do not change the speed of the hydrogen. This research could provide theory reference for the design and application of the structure of the coil base of the high performance hydrogen bell-type annealers later.

Abstract: The fixing performance of chitosan hydrochloride (CSH) with different molecular weight and chitosan biguanide hydrochloride (CSGH) as a fixing agent for cotton fabric dyed with reactive dyes was discussed. The results showed that the fixing effects of CSH on reactive dyes were related to its molecular weight, and the CSH with high molecular weight (HMW) exhibited better fixing effects than that with low molecular weight (LMW). The fixing effects of CSGH on reactive dyes were superior to that of the CSH with HMW, because of the CSGH molecule with positive charges and the imino groups, which could further strengthened the interaction among the CSGH, dyes and cellulose molecules. After treated by the CSGH, the soaping, perspiration and dry rubbing fastness of the dyed fabrics could be increased 0.5 to 1 grade, while the wet rubbing fastness of ones was also improved obviously. The infrared spectrum (FTIR) of the dyed fabric treated by CSGH showed that a cross-linking was formed among CSGH, dyes and cellulose molecules.

Abstract: Density functional theory (DFT) calculations were performed to investigate the structures of tert-butyl silsesquioxanes Si2nO3n(CMe3)2n (n=1-6). Our study focuses on the structures, stabilities, and electronic properties of the tert-butyl silsesquioxanes. The large HOMO–LUMO gaps, which range from 5.68 to 6.99 eV, imply optimal electronic structures for these molecules.

Abstract: Based on the pore formation principle, geometrical model to describe cellular materials was constructed. The model is closed-cell rhombus dodecahedron with thick edges. The dependence of relative density on microstructure parameters and the unitary relation have been obtained. By finite elements method, the relative elastic modulus was simulated, the influence of microstructure and relative density on elastic modulus was analyzed. The results show that the wall-face connective curvature radius is the primary affecting factor of relative density increment and the wall-thickness is less significant; the solid materials added at the intersecting part of the wall-faces produce same effect on elastic modulus. The conclusion can be applied in optimization design of cellular materials.

Abstract: Pearl fiber is evenly mixed with ultra-fine pearl particles spinning solution of cellulose fibers, made of a blend of functional spinning of regenerated cellulose fiber. This new fiber material not only preserves the beauty of pearls skin function, but also cellulose fiber material with moisture breathable, soft and comfortable, and other features. In this paper, on the basis of understanding of pearls on the fiber properties, being blended with cotton, for pearl yarn fiber blends high technology design. According to the design of spinning yarn spinning process of high principle requires, selecting process, determining the opening and cleaning, carding, combing, drawing, roving, spinning the reasonable parameters of procedures. At the same time, the problems in the spinning process and technical measures to be described. Include optimizing the process configuration, temperature and humidity control, choose the appropriate spinning equipment. For the development of high functional pearl textiles, clothing to meet consumer comfort, functionality needs make a help.

Abstract: In this study, the response surface methodology was used to optimize parameters of the diluted hydrochloric acid hydrolysis method, which was adopted to separate the polyester-cotton blend fiber. The four parameters reaction time, mass fraction of hydrochloric acid, reaction temperature and solid-liquid ratio were determined by the single factor experiment as they are significant for the process of separation. By introducing the experiment of four factors on three levels designed by Box-Benhnken central composite method, a quadric polynomial regression model for the fiber weight loss rate was established. And the response surface graphs were plotted to illustrate the optimizing process. The response surface analysis determined that the optimized value of the four parameters were 98 minutes, 10.7%, 96.5 °C and 4.3 g/100ml respectively. Under these conditions, polyester-cotton blend fiber was completely separated.

Abstract: Polyester/nylon blend fabric has some advantages, such as high strength, excellent drapability, but the biggest drawback of the blend fabric is the easily formed electrostatic. In this paper, the blend fabric was finished with the triblock copolymer containing organic silicon to improve the antistatic property of the fabric. The influence of the concentration of the finishing agent on the antistatic property was studied emphasisly. And the effect of antistatic, the feeling and the color fastness were analyzed. The results show that the finishing agent of triblock copolymer containing hydrophilic organosilicon with the concentration of 15 g/L can make the fabric achieve the best antistatic effect, the best feeling and the fabric color fastness is less affected.

Abstract: Open-cell rigid polyurethane foam was taken as core material of the vacuum insulated panel, and the effects of open-cell ratio, density, cell-diameter and intensity on adiabatic performance of the vacuum insulated panel were simply discussed. The effect of vacuum degree on it is also discussed. The pre-treated craft of vacuum insulated panel manufacture is introduced too. If the open-cell rigid polyurethane foam was taken as the core-material and pretreated craft was carried, the vacuum insulated panel’s thermal conductivity can be less than 10mW/(m•K).

Abstract: The color performance properties of brown naturally color cotton fabric was investigated in the elevated temperature home laundering, usually the Europe style laundering. The first laundering cycle would give naturally color cotton(NCC) fabric the most of color changes. The laundering did render NCC fabric darkening effect, and significant and proceeding color changes. The higher laundering temperature resulted in more color changes of the fabric. At least 0.5 class gray scale rating was increased for about per 30°C laundering temperature increase. The data reported here indicated that lower temperture home laundering benefit the color retentation and the care of the NCC fabric.

Abstract: Ultraviolet and visible light absorption property of fiber assembly is considered to be determined by the material structure. In this paper, X-ray computed tomography was implemented to characterize the internal porous structures of down fiber assemblies. And then fractal methods were used to clarify the nonlinear structures. Ultraviolet and visible spectrophotometer was adopted to measure the UV and visible light absorbance of down fibers. The peak of absorption curve appeared red or blue shift according to the different fractal dimensions. The relationship between the absorption peak and fractal dimensions was built up.