Advanced Materials Research Vols. 332-334

Abstract: A simple and efficient one-pot method for the preparation of 2H-indazolo [2,1-b] phthalazine-triones from phthalhydrazide, dimedone and aromatic aldehydes has been developed using ionic liquids as catalysts. Two ionic liquid catalysts are described, and the ionic liquid [(CH2)4SO3HMIM]HSO4 catalyst is found to be more effective than [HMIM]HSO4 for this condensation reaction.

Abstract: Renovation and Reform of inventory fabric has been problems that Garment enterprises want to solve, is also a big topic what broad fashion designers are confronted with. Simultaneously, Renovation and Reform of inventory fabric is also about Social resources recycle, this article will be elaborated from several aspects. At the same time, the article probes into inventory fabric reuse, in order to keep inventory fabric get reasonable use, reflect design value.

Abstract: It is necessary to analyze the structural strength of the moving arm and make some optimization designs to reduce its weight. According to the actual structural sizes of the moving arm of a loader, we build its 3D mathematical model by bottom-to-up modeling method in ANSYS. Having considered bearing actual loads and displacement constraint conditions of a moving arm in actual working situations, we got the stress distribution rules and the destructible locations of the moving arm in a working cycle after analyzing the strengths of the moving arm in six different typical kinds of working conditions. Based on this, we made the design module and the structural optimization designs of the moving arm by using first-order method based on the objective function's sensitive degree to design variables in ANSYS software. The results of the study suggest that the maximum equivalent effective stresses in six different typical kinds of working conditions are all less than the admissible stress of the material of the moving arm, and the maximum bearing stress exists in the working condition with bearing unbalance loadings in horizontal and vertical directions. The advantage of the optimization design is outstanding with the 67% less of the maximum equivalent stress of the moving arm and 15.4% less of the volume.

Abstract: The text summarizes raw material, manufacture method, stab-resistant mechanism, stab-resistant effect and the problem of the hard stab-resistant clothing, semi-soft Stab-resistant clothing and soft stab-proof clothing, and evaluates the advantages and disadvantages of various stab-resistant clothing. Base on the analysis of the development course and status of stab-resistant clothing, it explores and discusses the developing trend and research emphases of the stab-resistant clothing according to requirements of the industrialization of the stab-resistant materials. This paper also put forward the suggestions and ideas about manufacture stab-proof textiles by composed yarn technique.

Abstract: A fiber-supported palladium catalyst was synthesized simply by amidoximation reaction from poly (acrylonitrile/vinylamine)(PANVAm) fiber. The structure and properties of the catalyst were characterized XPS. High efficiency of the catalyst along with its recycling ability was demonstrated in the Heck reaction.

Abstract: In order to investigate the effects of addition amount, particle size distribution and aver- age particle size of NaCl porogen on the pore connectivity of silk fibroin (SF) / hydroxyapatite (HA) porous composites. In this paper, the SF/HA composites were fabricated by means of isostatic pressing. The pore structure of SF/HA porous composites was observed by Scanning electron microscopy (SEM), and the air permeability was tested by home-made device. Results indicated that the larger addition amount of NaCl particles, the greater scope of NaCl particles size distribution and increased the average particle size of NaCl particles were able to make the pore connectivity of the material improved significantly. The materials with good pore connectivity, which were conducive to the immigration and adhesion of bone repair cells, information transmission and exchange with the outside tissue, and also benefit for bone tissue regeneration.

Abstract: Multi-layered biaxial weft knitted fabrics has excellent mechanical properties and formability. The performances of multi-layered biaxial weft knitted fabrics were compared with multi-axial warp knitted fabrics and plain weave fabrics to highlight the advantages of this novel fibrous assembly. The manufacturing method and applications of the developed novel fabrics were illustrated in details.

Abstract: In this paper, UV spectrophotometry was used to test the chromium content of bast fiber of ramie and diphenylcarbazide (DPC) was used as color reagent. The optimal technology was: dropping volume of phosphoric acid 0.4～0.6 mL, DPC content 2.0~4.0 mL and coloration time 5-10 minutes. The results showed that complexes were formed from Cr (VI) ions and DPC under phosphoric acid condition. There was a maximum positive absorption peak at the 540nm. Cr (VI) concentration (in the range of 0.004～1.000 mgL-1) and the absorbance (A) of complex obeyed the Lambert-Beer law.

Abstract: Two novel polyimides(PIs) were polymerized from 1,4-bis((4-amino-2-(trifluoromethyl)phenoxy)methyl)cyclohexane, with aromatic tetracarboxylic dianhydrides using the typical one-step method. The inherent viscosity of the PIs were around 0.90dL/g, and they exhibited an excellent solubility and optical property. They were readily soluble not only in some strong polar solvents such as N-methyl-2-pyrrolidone (NMP), N,N-dimethylacetamide (DMAc), N,N-dimethylformamide (DMF), but also in some low-boiling-point solvents such as chloroform (CDCl3), and tetrahydrofuran (THF). The PIs film showed high optical transparency and colorless with cut-off wavelength in 332nm and 338nm. Meanwhile, the temperature of 10% weight loss in air and nitrogen were higher than 441°C and 449°C respectively, and their glass-transition temperature (Tg) were higher than 348 °C. Furthermore, they possessed good mechanical properties with tensile strengths of 69–71MPa, elongations at break of 11.6–15.4% and low moisture absorption (<2%).Due to their properties, the polyimides could be considered as photoelectric and micro-electronic materials.

Abstract: Northwest Woollen Factory, sited in the Small North Gate of Taiyuan, has already become one of the largest woollen mills in the People’s Republic of China since it was planted in September 1934 with registered capital of 450,000 yuan, 58 staff and 664 workers. It covers 22,117 square meters, 7324 square meters of which are construction area. With 12 carding machines, 900 crude textiles, 6 combing machines, 2100 fine spinning frames and 123 power looms, it can produce woollen cloth, blankets, ceremonial dresses, gabardine, car blankets, bed blankets and so on. The net income in the first half year of 1937 is more than three million, and annual profit in 1936 is more than 78 million. It can produce 80,000 square meters Paris Merino, 13,608 kg handmade wool, 3,000 meters blankets each year. Products are mainly sold to Xi'an, Zhengzhou, Shanghai, Beijing and other big cities, and it has been one of the largest woollen mills in the Northwest's and one of the most famous in the country.