平板显示基板玻璃窑炉烟气脱硝技术探究

随着生态环境意识的加强和环保治理力度的提升,平板玻璃窑炉烟气氮氧化物治理已经全面落实.而由于平板显示基板玻璃窑炉烟气性质的独特性,其脱硝技术路线的选择也取决于不同地区氮氧化物排放浓度的限值差异.详细介绍了选择性催化还原法(SCR)、选择性非催化还原法(SNCR)和逆向流选择性催化还原法(CSCR)三种脱硝技术并对比了三...     

浅析通信建筑中玻璃幕墙的节能

在分析热对流、传导和辐射等热力学传导要素的基础上,介绍了中空玻璃、真空玻璃、吸热玻璃、热反射镀膜玻璃、低辐射镀膜玻璃、智能幕墙层等的节能效果,最后给出了玻璃幕墙上窗的结构形式及选材.     

广州某建筑的玻璃幕墙节能改造措施及其经济性分析

以广州某典型的玻璃幕墙建筑——某高校图书馆为研究对象,针对其夏季供冷能耗高的现状,利用建筑能耗模拟分析软件DeST-c,通过构建合理的建筑模型,分析其能耗大的原因;提出3种节能改造方案,对其节能潜力和经济性进行了计算分析。研究结果可为夏热冬暖地区玻璃幕墙建筑的节能改造提供参考。     

基于Solidworks的FOG邦定机模块化设计研究

从产品模块化的概念入手,介绍了模块划分和建立时需注意的问题。基于Solidworks平台,建立了FOG邦定机模块化设计模型。     

玻璃、陶瓷表面Ni-P化学镀研究

在普通平板玻璃和空心陶瓷基材表面沉积Ni-P合金。对镀液成分及用量、温度、pH值、施镀时间等工艺参数用均匀设计进行组合筛选,获得可沉积光亮Ni-P镀层的中低温酸性玻璃基体Ni-P化学镀工艺:NiSO4.7H2O30gL-1,NaH2PO2.H2O22gL-1,琥珀酸36gL-1,添加剂A2mgL-1,温度48～50℃,pH值5.8～6.0;对玻璃表面化学镀镍进行改进获得了空心陶瓷表面高温酸性Ni-P化学镀工艺:NiSO4.7H2O29gL-1,NaH2PO2.H2O38gL-1,琥珀酸36gL-1,添加剂A2mgL-1;,温度90±1℃,pH值5.5～6.0。玻璃表面镀层表面质量良好、光亮、平整,有较好结合力;有效沉积时间达到15min时,空心陶瓷表面镀层表面质量良好,与陶瓷表面有较好结合力。     

Glass fibers with clay nanocomposite coating: Improved barrier resistance in alkaline environment

Coatings made from neat vinyl ester and nanoclay reinforced vinyl ester composites are applied onto individual glass fibers as well as rovings to evaluate their barrier resistance against alkali and moisture attack. The fibers coated with clay nanocomposites present a significantly less damage caused by the diffusing alkali ions, giving rise to a much higher residual tensile strength after aging than the fibers without coating or those with a neat polymer coating. The static fatigue test performed on individual fibers verifies the advantage of using nanoclay composite to retard the corrosion process under the combined stress and alkaline environment. Similar beneficial effects of incorporating nanoclay on residual strength are identified for impregnated fiber bundles. The above observations confirm the excellent barrier characteristics of intercalated/exfoliated nanoclay in polymer that are applied in composite structures on both the microscopic and macroscopic scales.     

Extraction and preparation of bamboo fibre-reinforced composites

Natural plant fibre composites have been developed for the production of a variety of industrial products, with benefits including biodegradability and environmental protection. Bamboo fibre materials have attracted broad attention as reinforcement polymer composites due to their environmental sustainability, mechanical properties, and recyclability, and they can be compared with glass fibres. This review classifies and describes the various procedures that have been developed to extract fibres from raw bamboo culm. There are three main types of procedures: mechanical, chemical and combined mechanical and chemical extraction. Composite preparation from extracted bamboo fibres and various thermal analysis methods are also classified and analysed. Many parameters affect the mechanical properties and composite characteristics of bamboo fibres and bamboo composites, including fibre extraction methods, fibre length, fibre size, resin application, temperature, moisture content and composite preparation techniques. Mechanical extraction methods are more eco-friendly than chemical methods, and steam explosion and chemical methods significantly affect the microstructure of bamboo fibres. The development of bamboo fibre-reinforced composites and interfacial adhesion fabrication techniques must consider the type of matrix, the microstructure of bamboo and fibre extraction methods.     

Cracks in glass under triaxial conditions

This experimental work documents the mechanical evolution of synthetic glass (SON68) under compressive triaxial stresses (hydrostatic and deviatoric conditions). The experimental setup enabled to monitor and vary independently confining pressure (range: [0, 50] MPa) and axial stress (up to 680 MPa) at room temperature. An optimized set of sensors allowed us to perform measurements during the experiments of: (i) axial and radial deformation, (ii) P- and S-elastic wave velocities, and (iii) acoustic emissions. In addition, in some samples, initial crack densities up to a value of 0.24 were introduced by thermal cracking. We compare the original synthetic glass data set to results obtained in the same experimental conditions on thermally cracked glass and on a basaltic rock with similar petrophysical properties (porosity, chemistry).Stress-strain data depict original linear elastic glass properties even up to an axial stress of 680 MPa (under 15 MPa confining pressure). A strong strength decrease (370 MPa at 15 MPa confining pressure) is observed for thermally cracked samples. Elastic wave velocity data highlight that cracks are mostly closed at a confining pressure of ∼30 MPa. The basaltic rock seems to correspond to an intermediate state between an original and a thermally treated glass. In all samples, damage was accompanied by dynamic crack propagation, producing large magnitude acoustic emissions. Thanks to a continuous recorder, we could locate a number of acoustic emissions in order to image the microcracking pattern evolution prior to failure.     

Investigation the effect of cellulose on the structure and properties of polypropylene fibres

The modification of polypropylene fibre during their production is usually performed with the aim to improve some end-use properties of final polypropylene textiles. The most common procedure for the modification of polypropylene fibres involves adding additives in the form of masterbaches, which are incorporated into polymer by physical means during fibre formation. The presented work is focused on the investigation the effect of natural organic additive cellulose on the preparation, morphology and the thermal properties of polypropylene fibres. The series of modified pre-oriented and drawn polypropylene fibres with different content of cellulose from 0 wt. % to 3 wt. % were prepared via the classical discontinuous process of melt spinning and drawing. The non-isothermal crystallization and melting behaviour of pre-oriented and drawn polypropylene fibres were analysed by differential scanning calorimetry tests under nitrogen atmosphere. The surface morphology of polypropylene fibres and cross-sectional shapes were examined by scanning electron microscopy. The obtained experimental results were compared with reference polypropylene fibres prepared under the same technological conditions.     

THERMAL AND DYNAMIC-MECHANICAL PROPERTIES OF FROZEN WHEAT DOUGHS WITH ADDED SUCROSE,NaCl, ASCORBIC ACID,AND THEIR MIXTURES

The effects of sucrose, NaCl, and ascorbic acid on the physical state of wheat dough at sub-zero temperatures were investigated using Differential Scanning Calorimetry (DSC) and Dynamic-Mechanical Analysis (DMA). The DSC thermograms were obtained for annealed samples by scanning from ?80 to 10°C at 5°C/min. Added sucrose and NaCl decreased the onset of ice melting of doughs, and they were found at ?26°C. Added sucrose and NaCl increased the relative amount of unfrozen water in doughs, while added ascorbic acid had not noticeable effects. DMA measurements were made for annealed samples at a heating rate of 1°C/min from ?150 to 10°C. The loss modulus, G″, of DMA showed an α-relaxation (glass transition), two low temperature relaxations (β and γ), and melting of ice in all doughs with added ingredients.