Advanced Materials Research Vol. 502

Abstract: The evolution of recrystallization texture in the non-orientation electrical steel containing copper during annealing at 950°C for 3～180s have been studied by EBSD (Electron Backscatter Diffraction) measurements. Goss grains({011}) are nucleated within shear bands in deformed {111} and{111} grains. {111} grains nucleate in deformed {111} grains and new{111} grains nucleate in deformed {111}grains. {111} grains have an evident advantage both in number and growth rate over α grains, thus the controlling of annealing time can contribute to the increase of {011} texture.

Abstract: A liquid bridge formed between two coaxial, circular, solid disks was vibrated to study the effects of small vibrations on the stability of a free surface of the liquid bridge. The liquid bridge was vibrated by tapping its upper disk and by using a motor placed nearby. Experiments were conducted for isothermal liquid bridges of silicone oil (5 cSt) with a disk diameter of 7.0 mm. By subjecting the liquid bridge to small vibrations, the characteristics of vibration-induced surface oscillation have been clearly determined.

Abstract: In this paper, an integration of BP neural network and PCA for modeling wood water content of larch combined with NIRS was investigated. The original spectra were collected and pretreated with 9 point smoothing and multiplicative scatter correction (MSC). Five typical principal components were extracted from PCA with the application of establishing prediction model. Full cross-validation approach was applied to achieve desirable modeling performance. The prediction correlation coefficient (R) was 0.952 while the mean square error of prediction (MSEP) was 38.27. This study indicated that NIR is a useful tool for rapid and accurate prediction of wood water content.

Abstract: Zinc oxide (ZnO) nanocrystalline with different morphologies, used in ultraviolet (UV) light detection, was successfully fabricated by directly oxidizing metallic zinc at high temperature. X-ray diffraction spectra show that the as-prepared samples are hexagonal wurtzite structure. Scanning electron microscopy images indicate that ZnO with different morphologies such as comb-like, tetrapod and bullet structures could be controlled by simply variables like gas flow rate, ambient pressure and growth temperature. The Photoluminescence (PL) spectra were employed to reveal native point defects in ZnO nanocrystalline. The UV detection properties of ZnO nanocrystalline films screen-printed on interdigital electrodes were investigated by observing the changes of capacitance and conductance under different light sources. The results indicate that the comb-like ZnO nanocrystalline has high UV sensitivity.

Abstract: As a purpose of developing new micro-actuator driven by the liquid crystal flow, transient behaviors of a nematic liquid crystal between two parallel plates are computed with parameter of twist angle. The Frank and Leslie-Ericksen theory were used. When the twist angle is 0 deg, the induced flow is planar, and when the twist angle is not 0 deg, the flow has a out of plane component. The twist angle has little effect to the time characteristics of the flow. In the experiment, the applied voltage of 5 was used, and the results are in agreement with the calculation results.

Abstract: Silk fibroin is regarded as a biomaterial for a long time. The fantastic biocompatibility of silk fibroin makes it a hot spot in the biomedical area and many researches has chosen it as a basic material to create new biomaterials. However, it has a long biodegradation period in body. Gamma ray is a method to accelerate degradation of other material in some experiments. This research combines silk fibroin with gamma ray and tries to figure out whether gamma ray can make the biodegradation of silk fibroin shorten. In this article, we give various doses of gamma ray to silk fibroin films and take some measurements about the mechanical and molecular structure of post-radiated silk fibroin, thus to choose an appropriate dose for the future research.

Abstract: In order to measure thickness and Study on growth behaviors of oxide layers on grinding wheel surface in ELID, measurement system accuracy is verificated with laser and eddy current sensor for simulation measurement of oxide layers, Growth behaviour of oxide layers were measured in pre-dressing process, the results indicate inward growth speed of oxide layer is greater than outward growth speed along the radius of grinding wheel in the early , oxide layers keep linear growth and growth speed is the fastest; In the late ,inward growth speed of oxide layer slows, outward growth speed is slightly faster, but overall oxide layer growth slows down.

Abstract: The cellulose of raw bamboo fabric was first prepared by selective oxidation with NaIO4. Then the oxidized raw bamboo fabric was modified by sericin protein solution. The dyeing characteristic was studied. Also, the dyeing effect such as K/S value, color fastness, leveling properties were evaluated and compared with unmodified raw bamboo fabric. The results showed that the dyeing properties of oxidized raw bamboo fabric modified by sericin protein were improved. Furthermore, the whiteness of the modified raw bamboo fabric was decreased and the water absorption property was improved.

Abstract: A copolymer of vanillin and gallic acid was synthesized using HRP/H2O2 as initiator. The chemical structure of the copolymer was characterized by means of FTIR, NMR and GPC. The copolymer was applied in making leather as a tanning agent and the shrinkage temperature (Ts) of tanned leather reached 82.5°C. The average thickness increment ratio (E) of retanned leather was 19.4%. It has also excellent assisting dyeing and soft leather fibers properties. The application leather has desired dyeing effect and excellent softness.

Abstract: In order to study the shading property of the fabric, there are several parameters of the fabrics were tested, they are include the transmission and reflectivity for the Ultraviolet light, the transmission and reflectivity for the visible light. From the test results, following conclusions can be gotten: under same situation, the percent of void for the fabric will affect the transmission of the Ultraviolet light and the visible light. When the interweaving frequency is bigger and the float is shorter, the reflectivity of the Ultraviolet light is lower and the reflectivity of the visible is higher.