Advanced Materials Research Vols. 466-467

Abstract: According to the low temperature spray process, using double quick cement, retarder, water retaining agent, water reducing agent, polymer, fiber was investigated using orthogonal theory the feasibility of preparation of guniting material. Through the experimental research prepared early strength, high adhesiveness, high crack resistance, high economic performance of gunite material, its each index can meet the requirements of the application.

Abstract: For the study of reinforced concrete beam stress performance under ultra-low temperature, based on the material constitutive and mechanism at ultra-low temperature. The concrete constitute model and the simulation model are presented by DIANA software environment, the numerical simulations is implemented. The component test is expanded, and the experimental program is presented. The result of component test is compared with the simulation of DIANA. The results show that the reinforced concrete beam bearing capacity and stiffness are increased with lower temperature.

Abstract: The crystallization kinetics of polymer thin film has a great difference from that in the bulk. Generally, the growth rate of the crystal confined in thin film reduces with decreasing film thickness, which is believed that the interaction between chains and substrate is responsible for the decrease of the growth rate. In addition, the ratio of film thickness over crystal thickness is also a key parameter in determining the growth rate. The relationship between the crystal lateral size and the crystallization time also dominates the crystal growth mechanism in polymer thin film.

Abstract: Biological material was prepared by adhering different amount of bamboo charcoal filler into the matrix of polyvinyl formal foam by manual controlled foaming process. The material bears properties of low density, high strength, and good adsorption ability from the advantage of polyvinyl formal. It can be used as new efficient biological supporting material in sewage disposal system. The effects of hydrochloric acid, formaldehyde, bamboo charcoal, and temperature on the preparation were investigated.

Abstract: The effects of Cu element on properties of Al-Mg-Si aluminum alloy was studied, and the mechanism of Cu in influencing the property of the alloy was discussed. The results indicate that Cu element can weaken the conductivity property of alloy material, its thermal conductivity is improved with slow cooling. Cu element is sensitive to corrosive property of the alloy, it can cause corrosion resistance decreasing significantly, quenching heat treatment made corrosive property of the material deteriorative. Proper Cu element is helpful to microstructure refinement and the enhancement of strength, tensile strength of the material is increased 10 percent after solution treatment and ageing strengthening.

Abstract: In certain air compressor plate in the high speed revolving situation, based on the finite element theory, stress distribution in air compressor plate can be obtained. After the pre-stressed plate is carried on the modal analysis, fifth-order inherent frequency from first-order to fifth-order can be calculated out. After modal of compressor plate can be expanded, Relative deformed shape, relative displacement vector sum and relative Von Mises stress mode of compressor plate from first-order to fifth-order can be obtained.

Abstract: Silicon sol solution was introduced into poplar wood by vacuum-pressure impregnation process, and a series of composites with different weight percent of gain (WPG) were prepared. The structure and properties of the untreated and composite wood were investigated. Compared to untreated wood, composite wood had a promising potential to improve mechanical properties like bending strength, modulus of elasticity and surface hardness. SEM pictures of composite wood with 30.3 WPG showed that the SiO₂ gels filled the pores of the wood but unchanged the structure and morphological arrangement. TG and contact angle results indicated that composite wood showed an improved thermal property and water repellent property, and those properties increased with increasing of WPG.

Abstract: Due to the complex working and storage environment for airplanes, the consumptive failures of airborne products are unavoidable. Aiming at the problem that degradation behaviors that cause this kind of failures are frequently neglected, based on the concept of degradation for airborne products, a new method of conducting research that treats aging process as a critical degradation behavior is presented. According to the characteristics of airborne mechano-electronic products, steering engine is defined as a critical airplane airborne mechano-electronic product. Through detailed analysis of the vulnerable area of steering engine, the failure mechanism of aging of steering engine rubber seal is discussed. The degradation model of steering engine rubber seal is presented. Finally, feasibility of the method that replaces the research of degradation behavior of the airborne mechano-electronic products with that of aging is verified.

Abstract: Soil humidity is considered as one of important soil parameters and is already used widely in agriculture information system. The measurement of the soil humidity, characterized by accuracy and continuity, can help build useful information systems for modern agriculture. Remote detection of soil humidity can be achieved easily by using wireless sensors network (WSN). In this paper, a way to build an automatic irrigating system taking advantage of humidity measurements, which is obtained based on Wireless Sensor Network, is proposed. That how the humidity is detected and how the WSN is constructed is discussed. Furthermore, the connection of hardware devices and the programs of software is described.

Abstract: The purpose of this work was to prepare a multi-function adhesive for reconstituted tobacco. With chitin as the main raw material, adding complex moisturizer, cross-linking agent and other additives, an adhesive for tobacco sheet was obtained. Factor design was used in the experiment for formulation optimization. The product possesses excellent viscosity, water resistance and tensile strength.