Advanced Materials Research Vols. 884-885

Abstract: The dyeing and fastness properties of silk fabric dyed with natural dye extraction from the bark of Garcinia Dulcis (Roxb.) Kurz by the pad-batch process was studied. The effect of dyes at different mordant concentration levels on their colour strength was also investigated. Silk fabrics dyed with Garcinia Dulcis (Roxb.) Kurz bark extract showed a pale yellow shade, while those dyed with alum and stannous chloride bright yellow and light yellow colour, respectively. Silk substrates dyed with CuSO₄ gave a yellowish green colour, while those dyed with FeSO₄ had a dark brown colour. The fastness properties showed fair to good rating, whereas the colour fastness to perspiration was at a poor level.

Abstract: The La₂Ti₂O₇:Pr³⁺-coated fluorescent pearlescent pigment (FPP) was prepared as follows: preparation of TiO₂-mica pearlescent pigment; subsequently coated with lanthanum hydroxide and praseodymium hydroxide; finally treated with high-temperature annealing to form La₂Ti₂O₇:Pr³⁺. The obtained samples were characterized by means of scanning electron microscopy (SEM), pan-automatic chromatis-meter, laser particle size analyzer, photoluminescence excitation (PLE) and emission (PL). It is shown that the surfaces of FPP are homogeneous, dense and smooth when pH = 8.0. Moreover, the color shifts to a green-yellow hue for FPP compare with TiO₂-mica pearlescent pigment. Besides, strong blue emission at 504 nm and red emission at 605 nm are observed on FPP.

Abstract: Nonionic surface active agent AO-1, n-butanol, kerosene and water were mixed in varying proportions to compound micro-emulsion. According to different phase states of each micro-emulsion, some systems with representative were picked up, and then tested the interface properties of oil phase of the systems above. The experimental results show that there is a system with low interfacial tension and steady surface tension.

Abstract: The phosphorus removal from high-phosphorus iron ores by sodium roasting was studied. The effects of ratio of NaOH to NaCO₃, roasting temperature and reaction time on the dephosphorization ratio were investigated. The results showed that the dephosphorization ratio can reach 80.1% under the conditions of ratio of NaOH to NaCO₃ 5:6, roasting temperature 1100°C, and reaction time 120min. After sodium roasting, the content of phosphorus in iron ore sample complied completely with the requirements of steel production.

Abstract: The analysis of all kinds of selected chemicals, mixed starch was donethrough a specific process and orthogonal experiments. The best proportion ofthe new type of surface sizing agent was prepared through the glue applicationexperiments, testing paper physical properties. The results showed that thebest formula of surface sizing agent including borax, sodium silicate,anhydrous sodium sulfate, ferrous chloride which ratio is 3:4:2:1. At the sametime modifying agent was added so that the stable performance can be obtainedfrom the solid surface sizing agent. Homemade solid surface sizing agent canmake paper greatly improve the sizing degree, increased by 50.9%, the stiffnessof the tear strength increased by 56.7%, folding degrees increased by 53.0%.Compared with the surface sizing agent market, various aspects index improvedsignificantly.

Abstract: The sol-gel method is adopted in this study to prepare the TiO₂-composite semiconductor materials doped with ZnO, whose crystal structures are characterized by way of X-ray diffraction and Transmission Electron Microscopy (TEM). It is concluded that the optimal doping amounts of Zn and lanthanum and the calcination temperature are respectively 3%, 0.3% and 500°C. Mixed with water, the photocatalytic oxidation effects of reactive brilliant blue X-BR, taken as the degradation target, was investigated in this study. When the doping amount of lanthanum is 0.3%, the chroma removal rate of the reactive brilliant blue X-BR by lanthanum-modified ZnO-TiO₂ can reach 97.3%. The conditions for optimal decolorization rate are: under ultraviolet light for 2h, using the 100mg / L reactive dyes, controlling pH at about 1 and the chloride concentration at 1mol / L.

Abstract: Intensive study on flowing properties of two-phase fluid of gas and liquid during pipeline pigging helps to improve the safety operation of rich gas pipeline. Therefore, based on the multiphase fluid transient simulation software, a two-fluid model is employed to study the flowing regulation of gas and liquid in practical operation of natural gas pipeline pigging,especially the change rule of velocity,flow pattern, pressure, liquid holdup ratio, and liquid slug in the passing ball process. The results reveal that three flow patterns appeared in pipeline pigging. They are stratified flow, slug flow and bubble flow. The place where the particular flow pattern appears is related to the terrain. The biggest pressure is found at the entrance, then pressure comes down along the pipeline, and fluctuate according to the fluid amount and terrain; the transient velocity of pig is coherent with the terrain and liquid holdup ratio; small slug flows are easy to gather and form into a longer one. The research can somehow guide to the safety operation of natural gas pipeline pigging.

Abstract: Selecting lactam 2,6-pyridinedicarboxamide (PDCA) as the ligand and 1,4-butanediol as chain extender, we prepare polyurea polyurethane PDCA-PU; then, introduction of rare earth ion Eu³⁺ and small molecule ligands 1,10-phenanthroline (phen), synthesized binary and ternary polyurethane composite containing Eu³⁺, and comparing the fluorescence properties of the material. We investigated the thermal stability and luminescence properties of hybrids and found that the ternary hybrid materials exhibit better thermal stability and stronger emission intensity.

Abstract: The paper is devoted to the sol-gel synthesis of proton conductive organic-silicon composite membranes based on tetraethyl orthosilicate (TEOS) and copolymers of 2-methyl-5-vinylpyridine and vinyl chloride (MVP-VC), 2-methyl-5-vinylpyridine and vinyl acetate (MVP-VA), copolymers of ethylene glycol vinyl glycidyl ether and styrene (KS-1 and KS-2), and nitrogen-containing heteroaromatic derivatives of sulfonic acids: 2-phenyl-5-benzimidazolsulfonic acid (PBISA) and pyridine-3-sulfonic acid (PSA). Properties of synthesized membranes, such as proton conductivity, activation energy, ion exchange capacity, dimensional stability have been investigated.

Abstract: In the present study, natural dye from lac dye and various metallic salts have been used to identify the proper dyeing condition for attaining high quality natural dyeing along with imparting UV protection property to the dyed silk fabric. Silk fabrics dyed with lac extract showed a light pink shade, while those dyed with alum and stannous chloride pinkish-red colour. Silk substrates dyed with CuSO₄ gave a purple red colour, while those dyed with FeSO₄ had a reddish-gray colour. The fastness properties ranged from fair to good, while washing fastness was poor level. The ultraviolet protection factor (UPF) values of silk fabric dyed with and without metal mordants ranged between very good and excellent for the silk fabric.