共查询到20条相似文献，搜索用时 234 毫秒
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欧洲空客公司研制的世界最大民用货机A380F已投入生产，生产过程中大量采用了新材料。A380F的中央翼盒和机上许多部件一样，采用了碳纤维加强塑料(CFRP)。这种材料重量较轻，强度更高。除CFRP外，A380F货机还大量使用了玻璃纤维一铝合金层板。这种材料由多层铝合金和玻璃纤维层叠而成， 相似文献
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以高强纤维织物为骨架材料、表面涂覆高性能涂层材料，并具有良好的阻燃、耐老化、抗风载雪及自洁性能，可广泛用作展览、体育、交通、休闲等建筑物的屋顶材料并承载应力的新一代复合材料，人们称之为现代建筑膜结构材料(以下简称建筑膜材)。常用的建筑膜材可分为两类，一类是以涤纶织物为基材、表面进行聚氯乙烯(PVC)涂层的产品，另一类是以玻璃纤维织物为基材、表面进行聚四氟乙烯(PTFE)涂层的产品。前者一般用于使用年限在15年以下的临时性或半永久性建筑，后者则用于永久性建筑。本文所论述的主要是以涤纶织物为基材的PVC类建筑膜材。 相似文献
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杨春玲 《内蒙古科技与经济》2013,(10):83-84
铝箔玻璃纤维复合风管道作为一种新型的空调通风管道材料在国内不断的推广应用。针对铝箔玻璃纤维复合板能作为空调通风管材的特性,讨论其在工程中的适用性和施工中应掌握的要点。 相似文献
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玻璃纤维,顾名思义是一种玻璃成分纤维状的材料。但在很多场合,人们赋予这一词汇更多的内容,不仅指用量最广的各类硅酸盐玻璃纤维,也包括硼酸盐纤维、钛酸钾纤维、碳化硅晶须等特种玻璃成分的纤维,甚至包括碳纤维,成为无机非金属纤维的代用词汇。 相似文献
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针对玻璃纤维土工格栅新型合成材料在公路改扩建工程项目中的应用和施工工艺、关键点作了阐述,同时结合具体工程实践和项目管理的总结对经济效益做了分析。 相似文献
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结合105国道济宁段改建工程沥青路面及半刚性基层裂缝处理措施，详述了玻璃纤维土工格栅的特性和作用机理，以及其在沥青路面中的应用。 相似文献
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随着国内节能降耗、减排要求的日渐提高,高温工业烟气过滤产业市场空间巨大,我国已成为是世界最大的过滤材料市场。袋式除尘技术为目前工业除尘的主要方式,发展耐高温、高性能玻璃纤维除尘滤料具有广阔的市场前景。 相似文献
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电容式电压互感器(简称CVT)过去使用的二次接线板有两种：一种为3240环氧酚醛层压玻璃布板，该板由于绝缘性能好，材料来源广泛，但该板介质损耗tgδ较大(受潮后更大)；另一种为环氧树脂浇注接线板，该板虽然电气性能明显优于3240环氧酚醛层压玻璃布板，但该种浇注板材质太脆，内部无玻璃纤维增强以至在使用过程中有时断裂造成渗漏。 相似文献
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This paper presents a convenient strategy to modify the surface of whole-Teflon microfluidic chips by coating the channel walls with a thin layer of polydopamine (PDA) film, which is formed by oxidation-induced self-polymerization of dopamine in alkaline solution. Two coating strategies, static incubation and dynamic flow, are demonstrated and used for tuning the physical and chemical properties of the coated channel walls. The functionalized surfaces were investigated with the contact angle, X-ray photoelectron spectroscopy, and atomic force microscopy measurements. The coating time was optimized according to the fluorescent intensity of the green fluorescent protein immobilized on the modified surface. Applications of the PDA-modified Teflon microchips in bioanalysis were demonstrated with a typical sandwich immunoassay. Moreover, long-term cell culture experiments on modified and native Teflon chips revealed that the chip biocompatibility can be greatly improved with PDA coating. The results indicate that the surface properties of the Teflon can be easily controlled by the PDA modification, thus greatly expanding the application scope of whole-Teflon chips for various chemical and biological research fields. 相似文献
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Chao Wei Beiyuan Fan Deyong Chen Chao Liu Yuanchen Wei Bo Huo Lidan You Junbo Wang Jian Chen 《Biomicrofluidics》2015,9(1)
This paper presents a microfluidic device (poly-dimethylsiloxane micro channels bonded with glass slides) enabling culture of MLO-Y4 osteocyte like cells. In this study, on-chip collagen coating, cell seeding and culture, as well as staining were demonstrated in a tubing-free manner where gravity was used as the driving force for liquid transportation. MLO-Y4 cells were cultured in microfluidic channels with and without collagen coating where cellular images in a time sequence were taken and analyzed, confirming the positive effect of collagen coating on phenotype maintaining of MLO-Y4 cells. The proliferating cell nuclear antigen based proliferation assay was used to study cellular proliferation, revealing a higher proliferation rate of MLO-Y4 cells seeded in microfluidic channels without collagen coating compared to the substrates coated with collagen. Furthermore, the effects of channel dimensions (variations in width and height) on the viability of MLO-Y4 cells were explored based on the Calcein-AM and propidium iodide based live/dead assay and the Hoechst 33258 based apoptosis assay, locating the correlation between the decrease in channel width or height and the decrease in cell viability. As a platform technology, this microfluidic device may function as a new cell culture model enabling studies of osteocytes. 相似文献
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主要发生在苗期的根腐病以及花荚期的蚜虫病,是黄芪生长发育过程中经常发生的病虫害,本文应用课题组自制的种衣剂对黄芪种子进行包衣,不包衣的黄芪种子为对照组,通过田间试验,以黄芪种子发芽率、黄芪根腐病发生情况、蚜虫发生程度三者为考察对象,从而针对自制黄芪中药种衣剂对黄芪的包衣效果进行初步的研究。 相似文献
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涂层混凝土在应力腐蚀条件下氯离子渗透性能的变化是一个新的课题。本文利用自行设计的加载设备对混凝土保护涂层及涂层涂刷次数等不同情况下的氯离子渗透性进行了研究。研究表明,保护涂层减小了混凝土在应力腐蚀环境作用下抗弯强度的损失。同时也提高了混凝土的抗氯离子渗透性,而且随着保护涂层刷涂次数的增加这种优越性越明显。 相似文献
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Raghuraman Sivalingam Subramani Chinnamuthu Subhransu Sekhar Dash 《Journal of The Franklin Institute》2017,354(12):4762-4783
This paper proposes to use a hybrid Stochastic Fractal Search (SFS) and Local Unimodal Sampling (LUS) based multistage Proportional Integral Derivative (PID) controller consisting of Proportional Derivative controller with derivative Filter (PDF) plus (1 + Proportional Integral) for Automatic Generation Control (AGC) of power systems. Initially, a single area multi-source power system consisting of thermal hydro and gas power plants is considered and parameters of Integral (I) controller is optimized by Stochastic Fractal Search (SFS) algorithm. The superiority of SFS algorithm over some recently proposed approaches such as optimal control, Differential Evolution (DE) and Teaching Learning Based Optimization (TLBO) is demonstrated. To improve the system performance further, LUS is subsequently employed. The study is further extended for different controllers like PID, and proposed multistage PID controller and the superiority of multistage PID controller over conventional PID controller structure is demonstrated. The study is further extended to a two-area six unit multi-source interconnected power system and the superiority of proposed approach over, TLBO and optimal control is demonstrated. Finally the study is extended to a three unequal area system power system with appropriate nonlinearities such as Generation Rate Constraint (GRC), Governor Dead Band (GDB) and time delay. From the analysis, it is found that hybrid SFS–LUS algorithm is superior to the original SFS algorithm and substantial improvement in system performance are realized with proposed multistage PID controller over conventional PID controller structure. 相似文献
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设计了适用于仿生机器人系统的离子型电活性聚合物柔性驱动器结构,采用溶胶-凝胶法制备新型离子液体聚合物凝胶,涂布法制备活性炭电极,并组装成柔性驱动器。利用扫描电镜表征驱动器的微观结构,结合循环伏安法分析电化学性能,根据应力-应变曲线求出杨氏模量。在分析驱动器致动机理的基础上,对其驱动性能进行测试,结果表明研制的新型柔性驱动器在仿生机器人领域有很好的应用潜力。 相似文献
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Definable surface chemistry is essential for many applications of microfluidic polymer systems. However, small cross-section channels with a high surface to volume ratio enhance passive adsorption of molecules that depletes active molecules in solution and contaminates the channel surface. Here, we present a one-step photochemical process to coat the inner surfaces of closed microfluidic channels with a nanometer thick layer of poly(ethylene glycol) (PEG), well known to strongly reduce non-specific adsorption, using only commercially available reagents in an aqueous environment. The coating consists of PEG diacrylate (PEGDA) covalently grafted to polymer surfaces via UV light activation of the water soluble photoinitiator benzoyl benzylamine, a benzophenone derivative. The PEGDA coating was shown to efficiently limit the adsorption of antibodies and other proteins to <5% of the adsorbed amount on uncoated polymer surfaces. The coating could also efficiently suppress the adhesion of mammalian cells as demonstrated using the HT-29 cancer cell line. In a subsequent equivalent process step, protein in aqueous solution could be anchored onto the PEGDA coating in spatially defined patterns with a resolution of <15 μm using an inverted microscope as a projection lithography system. Surface patterns of the cell binding protein fibronectin were photochemically defined inside a closed microfluidic device that was initially homogeneously coated by PEGDA. The resulting fibronectin patterns were shown to greatly improve cell adhesion compared to unexposed areas. This method opens for easy surface modification of closed microfluidic systems through combining a low protein binding PEG-based coating with spatially defined protein patterns of interest. 相似文献
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用芽孢杆菌、金黄色葡萄球菌、米曲霉的细胞或孢子悬浮注分别放置于元极堂及元极康复医院２４ｈ，采用稀释涂布法统计成活率，发现元极堂内三元场对试验的三种菌的成活率均有较大影响，２６株对照和１３５株经元极堂处理，分析蛋白酶活性变化，证明元极堂内三元场对米曲霉的产酶能力有较显著的影响。 相似文献