Advanced Materials Research Vols. 201-203

Abstract: The effects of different factors including tea polyphenols concentration, gelatin concentration, pH and temperature on the properties of tea polyphenol/gelatin mixed gels were investigated by using texture profile analysis. The results indicated that the factors all had the influences on mixed gel properties, such as hardness, elasticity, cohesiveness, chewiness, resilience, ets.FTIR spectra verified that tea polyphenols mainly interacted with gelatin by the phenolic hydroxyl binded with reactive group of gelatin peptidyl by hydrogen in the formation of gels. Thermal stability were determined to evaluate the properties of the mixed gels by TGA analysis.

Abstract: The viscosities of blend solution mixed with various concentration of chitosan and gelatin were investigated and the properties of the blend films prepared by gelatin and chitosan were studied by FT–IR, DSC and SEM in this paper. The results indicated that the viscosity of blend systems increased with the concentration increasing of chitosan, and that of mixed solution decreased with the concentration increasing of gelatin; there existed strong interactions between chitosan and gelatin molecular chains through hydrogen bond formation and chemical reaction; the surface of blend film had a relatively uniform and compact surface and the thermal stable of blend film was higher than pure gelatin film.

Abstract: The enhancement of physical absorption of CO2 in the presence of second liquid phase (dispersed organic phase) was investigated due to many important industrial applications. Gas-liquid interfacial area, volumetric mass transfer coefficient and amplification factor were calculated and discussed using penetration model. The experimental results indicated that addition of the dispersed organic phase to water leads to the increase of volumetric mass transfer coefficient by 46%, 34%, 20% for heptanol, toluene and heptane respectively. The performed in this paper shows that addition of the dispersed organic phase to water increases gas-liquid interfacial area and reduces bubble diameter. These two effects play an essential role in the rate of carbon dioxide absorption increase. The effect of enhancement could be quantified by an amplification factor.

Abstract: The effects of Oolong Tea Polyphenol and Black Tea Polyphenol on Gelatin Gels Texture properties were investigated in this paper. The results showed that the brittleness and hardness of gels added black tea polyphenol was higher than that of the blank sample, however, the brittleness and hardness of gels added oolong tea polyphenol was lower than that of the blank sample. The gel elasticity was maximum when adding black tea polyphenol concentration was 2.2%(w/v), and almost no-change before or after the maximum. The change of elasticity was not great with the increasing of oolong tea polyphenol concentration.

Abstract: In this paper, the effects of temperature, ionic concentration and pH on the blend solution of gelatin with sodium alginate were investigated and the properties of the blend films prepared by gelatin and sodium alginate were studied by FT–IR, DSC and SEM. The results indicated that the blend system of sodium alginate and gelatin had a conditional miscibility, the interactions between sodium alginate and gelatin molecular chains interact through hydrogen bond formation, the surface of blend film had a relatively flat and compact surface and the mass of blend membrane changed a little from 0°C to less than 800°C , however, dropped suddenly at 800°C which showed the stability of blend film was better.

Abstract: The research is part of wet-sieving concrete technique for building thermal insulated reinforced concrete composite wall. The fine aggregate concrete is made from ordinary concrete passing sieve with square mash of 15 mm for casting surface concrete layer of the wall, the recomposed concrete is made of residual concrete stayed on sieve and ordinary concrete for casting reinforced concrete structural wall. The impermeability of fine aggregate concrete and recomposed concrete are measured by water permeation method and chloride-ion permeation method, the relative permeability and chloride-ion diffusion coefficients of concrete are determined. Based on the test, the effects of the changes of aggregate series, sand ratio and cement paste on the impermeability of concrete are analyzed.

Abstract: The research in this paper is part of wet-sieving concrete technique for building thermal insulated reinforced concrete composite wall. The carbonized depths of fine aggregate concrete and ordinary concrete were measured by the carbonization test method. Based on the test, in standard test environmental conditions, the carbonization changes of fine aggregate concrete rely on its inherent combination changes. The lower carbonized depth takes place in fine aggregate concrete comparing with ordinary concrete, which is resulted from the increasing cement content and the reduction of grain size of coarse aggregate in fine aggregate concrete. Finally, the carbonization of fine aggregate concrete is evaluated according to the relative specification, and the reasonable service life of fine aggregate concrete is precast.

Abstract: In anti-seismic design of buried pipeline, selection of pipe-soil displacement transfer coefficient is the decisive factor for reasonable and stable analysis on seismic damage. This paper discusses calculation and selection of pipe-soil displacement transfer coefficient and related parameters, gives more definite, reasonable, simple, and reliable method of determination incorporating with existing achievements for analysis on seismic damage to buried pipelines. The results of analysis provide for anti-seismic design of buried pipelines with basis of reference.

Abstract: This article will perform the fluid-structural coupling analysis of composite material blades of the offshore wind power. The computer engineering software GH Bladed is used to get the wind pressure on the offshore wind power generator, than ANSYS engineering software is used to calculate the stress and strain distribution in the blades. From the analytical results, the stress distribution in the blades can be a basic data to design a new blade for the offshore wind power generator.

Abstract: Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been substantially taken from research in hot-rolled built-up members connected with bolts or welds [1]. The aim of this paper is to investigate on built-up back-to-back channels stub columns experimentally and theoretically using Effective Width Method and Direct Strength Method. Compression test was performed on 5 lipped channel and 5 back-to-back channels stub columns fabricated from cold-formed steel sheets of 1.2mm thicknesses. The test results indicated that local buckling is the dominant failure modes of stub columns. Therefore, Effective Width Method predicts the capacity of stub columns compared to Direct Strength Method. When compared to the average test results, results based on EWM are 5% higher while results based on DSM are 12% higher for stub column.