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Mechanical properties of steel mesh in anchor-mesh support for rocky tunnels
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作者 SUN Keguo JIA Jinglong +4 位作者 XU Weiping ZHANG Yu WANG Jinjin WANG Yichao LIU Yongkui 《Journal of Mountain Science》 SCIE CSCD 2024年第10期3487-3502,共16页
Underground geotechnical engineering encounters persistent challenges in ensuring the stability and safety of surrounding rock structures, particularly within rocky tunnels. Rock reinforcement techniques, including th... Underground geotechnical engineering encounters persistent challenges in ensuring the stability and safety of surrounding rock structures, particularly within rocky tunnels. Rock reinforcement techniques, including the use of steel mesh, are critical to achieving this goal. However, there exists a knowledge gap regarding the comprehensive understanding of the mechanical behavior and failure mechanisms exhibited by steel mesh under diverse loading conditions. This study thoroughly explored the steel mesh's performance throughout the entire loading-failure process, innovating with detailed analysis and modeling techniques. By integrating advanced numerical modeling with laboratory experiments, the study examines the influence of varying reinforcement levels and geometric parameters on the steel mesh strength and deformation characteristics. Sensitivity analysis, employing gray correlation theory, identifies the key factors affecting the mesh performance, while a BP (Backpropagation) neural network model predicts maximum vertical deformation with high accuracy. The findings underscore the critical role of steel diameter and mesh spacing in optimizing peak load capacity, displacement, and energy absorption, offering practical guidelines for design improvements. The use of a Bayesian Regularization (BR) algorithm further enhances the predictive accuracy compared to traditional methods. This research provides new insights into optimizing steel mesh design for underground applications, offering an innovative approach to enhancing structural safety in geotechnical projects. 展开更多
关键词 TUNNEL steel mesh BP neural network Anchor-mesh support Rock reinforcement technique
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Comparing the reinforcement capacity of welded steel mesh and a thin spray-on liner using large scale laboratory tests 被引量:7
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作者 Zhenjun Shan Porter Ian +1 位作者 Nemcik Jan Baafi Ernest 《International Journal of Mining Science and Technology》 SCIE EI 2014年第3期373-377,共5页
Steel mesh is used as a passive skin confinement medium to supplement the active support provided by rock bolts for roof and rib control in underground coal mines. Thin spray-on liners(TSL) are believed to have the po... Steel mesh is used as a passive skin confinement medium to supplement the active support provided by rock bolts for roof and rib control in underground coal mines. Thin spray-on liners(TSL) are believed to have the potential to take the place of steel mesh as the skin confinement medium in underground mines.To confirm this belief, large scale laboratory experiments were conducted to compare the behaviour of welded steel mesh and a TSL, when used in conjunction with rock bolts, in reinforcing strata with weak bedding planes and strata prone to guttering, two common rock conditions which exist in coal mines. It was found that while the peak load taken by the simulated rock mass with weak bedding planes acting as the control sample(no skin confinement) was 2494 kN, the corresponding value of the sample with 5 mm thick TSL reinforcement reached 2856 kN. The peak load of the steel mesh reinforced sample was only2321 kN, but this was attributed to the fact that one of the rock bolts broke during the test. The TSL reinforced sample had a similar post-yield behaviour as the steel mesh reinforced one. The results of the large scale guttering test indicated that a TSL is better than steel mesh in restricting rock movement and thus inhibiting the formation of gutters in the roof. 展开更多
关键词 steel mesh Thin spray-on liners Large scale laboratory experiments Strata with weak bedding planes Strata prone to guttering
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Cathodic activated stainless steel mesh as a highly active electrocatalyst for the oxygen evolution reaction with self-healing possibility 被引量:1
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作者 Gui-Rong Zhang Liu-Liu Shen +2 位作者 Patrick Schmatz Konrad Krois Bastian J.M.Etzold 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第10期153-160,共8页
The oxygen evolution reaction(OER)represents one of the major bottlenecks for broad-based applications of many clean energy storage/conversion technologies.The key to solving this problem lies in developing high-perfo... The oxygen evolution reaction(OER)represents one of the major bottlenecks for broad-based applications of many clean energy storage/conversion technologies.The key to solving this problem lies in developing high-performing,cost effective and stable catalysts for the OER.Herein,we demonstrate that ubiquitous stainless steel mesh(SSM)materials activated by a facile cathodization treatment can be employed as a high performing OER catalyst,as showcased by the impressively low overpotentials of 275 and 319 mV to reach the benchmark current densities of 10 and 100 mA cm^−2(1.0 M KOH),respectively.Cathodized SSM also exhibits excellent performance in a two-electrode water electrolyzer,which requires a low cell voltage of 1.58 at 10 mA cm^−2 and outperforms many of water electrolyzers using earth-abundant OER catalysts.Moreover,cathodized SSM with minor performance degradation after the stability test can also be readily healed by subjecting it to an additional cathodization treatment.It is disclosed that the superior performance of cathodized SSMs stems from the surface enrichment of OER active Ni(oxy)hydroxide,facile gas-bubble removal and transportation over the unique mesh-structured surfaces,while the abundant reservoir of nickel in the bulk allows healing of the catalyst by a facile cathodization. 展开更多
关键词 Oxygen evolution reaction Water splitting Stainless steel mesh Cathodization Mass transfer limitation SELF-HEALING
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Miniature Boat Fabrication with Striking Loading Capacity in Seawater from Hydrophobic Steel Mesh
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作者 Zai-xing Jiang Ming-qiang Wang +4 位作者 Hao Cheng Hai-bao Lv Yong-tao Yao Yong-ping Bai Lu Shao 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2015年第6期-,共5页
关键词 HYDROPHOBIC steel mesh Loading capacity
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Fabrication of a superhydrophilic/underwater superoleophobic stainless steel mesh for oil/water separation with ultrahigh flux 被引量:1
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作者 Jiawei Wang Jie Hu +2 位作者 Junjie Cheng Zefei Huang Baoqian Ye 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2023年第1期46-55,共10页
Because of the increasing amount of oily wastewater produced each day,it is important to develop superhydrophilic/underwater superoleophobic oil/water separation membranes with ultrahigh flux and high separation effic... Because of the increasing amount of oily wastewater produced each day,it is important to develop superhydrophilic/underwater superoleophobic oil/water separation membranes with ultrahigh flux and high separation efficiency.In this paper,a superhydrophilic/underwater superoleophobic N-isopropylacrylamide-coated stainless steel mesh was prepared through a simple and convenient graft polymerization approach.The obtained mesh was able to separate oil/water mixtures only by gravity.In addition,the mesh showed high-efficiency separation ability(99.2%)and ultrahigh flux(235239 L·m^(−2)·h^(−1)).Importantly,due to the complex cross-linked bilayer structure,the prepared mesh exhibited good recycling performance and chemical stability in highly saline,alkaline and acidic environments. 展开更多
关键词 oil/water separation N-ISOPROPYLACRYLAMIDE stainless steel mesh ultrahigh flux
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Three-dimensional interconnected Ni(Fe)OxHy nanosheets on stainless steel mesh as a robust integrated oxygen evolution electrode 被引量:8
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作者 Qi Zhang Haixia Zhong +3 位作者 Fanlu Meng Di Bao Xinbo Zhang Xiaolin wei 《Nano Research》 SCIE EI CAS CSCD 2018年第3期1294-1300,共7页
The development of an electrocatalyst based on abundant elements for the oxygen evolution reaction (OER) is important for water splitting associated with renewable energy sources. In this study, we develop an interc... The development of an electrocatalyst based on abundant elements for the oxygen evolution reaction (OER) is important for water splitting associated with renewable energy sources. In this study, we develop an interconnected Ni(Fe)OxHy nanosheet array on a stainless steel mesh (SSNNi) as an integrated OER electrode, without using any polymer binder. Benefiting from the well- defined three-dimensional (3D) architecture with highly exposed surface area, intimate contact between the active species and conductive substrate improved electron and mass transport capacity, facilitated electrolyte penetration, and improved mechanical stability. The SSNNi electrode also has excellent OER performance, including low overpotential, a small Tafel slope, and long-term durability in the alkaline electrolyte, making it one of the most promising OER electrodes developed. 展开更多
关键词 oxygen evolution reaction three-dimensional (3D)architecture stainless steel mesh (SSNNi) integrated oxygenevolution electrode
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Preparation of stainless steel mesh-supported ZnO and graphene/ZnO nanorod arrays with high photocatalytic performance
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作者 Hua Zhang Yao-zha Lv +4 位作者 Chang Chen Rong-sheng Chen Yang Li Hong-wei Ni Feng Zheng 《Journal of Iron and Steel Research International》 SCIE EI CSCD 2021年第7期874-888,共15页
A series of zinc oxide(ZnO)nanorods arrays with different morphologies are synthesized on stainless steel mesh via a facile electrodeposition method.The influences of electrodeposition parameters on the diameter,lengt... A series of zinc oxide(ZnO)nanorods arrays with different morphologies are synthesized on stainless steel mesh via a facile electrodeposition method.The influences of electrodeposition parameters on the diameter,length,density and morphology of obtained ZnO nanorods are investigated systematically.The results indicate that the electrodeposition potential is the key factor for the morphology of the obtained ZnO nanorods,which further showed the effect on the photocatalytic property of the obtained samples.Meanwhile,the prepared ZnO nanorods array exhibits an excellent photocatalytic activity for methylene blue(MB)in ultraviolet light.The degradation efficiency for MB solution reaches 95.1%under the irradiation of ultraviolet light for 120 min.In addition,the photocatalytic property of the prepared ZnO nanorods can be extended to the visible light region after the modified with graphene oxide(GO).The obtained GO/ZnO composite also shows remarkable photocatalytic activity and photostability.The photodegradation efficiency for MB is 83.6%,and the catalytic performance retains 97.3% of its initial photocatalytic activity after five cycles. 展开更多
关键词 Stainless steel mesh Zinc oxide Nanorod Graphene oxide PHOTOCATALYSIS Methylene blue
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叠合板钢筋网片柔性生产线控制系统研究
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作者 尹海斌 彭伟雄 +3 位作者 洪海清 施东兴 李中伟 余嘉俊 《重庆理工大学学报(自然科学)》 CAS 北大核心 2024年第8期181-187,共7页
针对当前叠合板钢筋网片生产过程中调试效率低的问题,提出了一套适用于装配式建筑领域的叠合板钢筋网片柔性生产线,通过灵活调整网片间距,实现网片柔性化生产。为解决叠合板钢筋网片柔性生产线中的控制器分配问题,建立了安装空间、网络... 针对当前叠合板钢筋网片生产过程中调试效率低的问题,提出了一套适用于装配式建筑领域的叠合板钢筋网片柔性生产线,通过灵活调整网片间距,实现网片柔性化生产。为解决叠合板钢筋网片柔性生产线中的控制器分配问题,建立了安装空间、网络传输距离与制造成本相结合的多目标优化模型,运用增强精英保留的多目标遗传算法对模型进行求解。计算结果表明:优化后的方案可以有效降低成本,保证网络传输,为设计一套安装便利、传输稳定及低成本的生产线控制系统提供了理论依据。 展开更多
关键词 分配问题 改进NSGA-Ⅱ算法 控制系统 钢筋网片生产线
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混杂网格增强超高性能混凝土双向板的弯曲性能
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作者 邓宗才 李倩 《天津大学学报(自然科学与工程技术版)》 EI CSCD 北大核心 2024年第3期301-310,共10页
网格增强超高性能混凝土(ultra-high performance concrete,UHPC)具有轻质、高强、耐久性好等特性,已应用于薄壁结构和工程加固领域,但单一网格很难实现高效的增强增韧效应.为研究混杂网格增强UHPC双向板的抗弯性能,对3个钢丝网格与玻... 网格增强超高性能混凝土(ultra-high performance concrete,UHPC)具有轻质、高强、耐久性好等特性,已应用于薄壁结构和工程加固领域,但单一网格很难实现高效的增强增韧效应.为研究混杂网格增强UHPC双向板的抗弯性能,对3个钢丝网格与玻璃纤维网格混杂增强UHPC板、3个钢丝网格与玄武岩纤维网格混杂增强UHPC板、6个单一网格增强UHPC板和1个无网格UHPC对照板进行弯曲试验,研究网格种类、总层数及铺层方式对其破坏形态、承载能力和弯曲韧性的影响.结果表明:与单一钢丝网格板和单一玻璃纤维网格板相比,钢-玻璃纤维网格混杂板开裂后表现更显著的硬化现象,在连续网格与混杂短纤维协同效应下,板呈现多裂缝破坏模式,延性较理想.铺设2层网格时,钢-玻璃纤维网格混杂板的承载能力较单一钢丝网格板提升23.7%,且其在20 mm挠度处的残余承载力较单一玻璃纤维网格板提升28.2%;钢-玄武岩纤维网格混杂板峰前阶段的能量吸收值和20 mm挠度处的残余承载力均优于单一玄武岩纤维网格板.网格总层数为3层时,与单一玄武岩纤维网格板相比,2层钢丝网格与1层玄武岩纤维网格混杂增强板在峰前挠度为2 mm时的能量吸收值提高了21.6%,20 mm挠度处的残余承载力提高了42.6%.钢-玻璃纤维网格混杂板的网格强度利用率最理想,其承载能力、能量吸收值及弯曲韧性指标均高于钢-玄武岩纤维网格混杂板.最后,考虑网格强度有效利用率建立了混杂网格增强UHPC双向板抗弯承载力理论公式,适用性良好. 展开更多
关键词 钢丝网格 玻璃纤维网格 玄武岩纤维网格 混杂效应 超高性能混凝土双向板 弯曲性能
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负载下活性粉末混凝土钢筋网加固足尺混凝土柱轴压性能试验研究
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作者 卜良桃 周恭慧 杜国强 《建筑结构》 北大核心 2024年第10期87-93,133,共8页
为提高负载下钢筋混凝土(RC)柱的轴心抗压性能,使用活性粉末混凝土钢筋网(RPCSM)对负载下的RC足尺柱进行加固,设计制作了7根RC方柱试件,其中1根未加固对比柱、1根端部箍筋加密加固柱、2根RPCSM加固柱、3根端部箍筋加密RPCSM加固柱。考... 为提高负载下钢筋混凝土(RC)柱的轴心抗压性能,使用活性粉末混凝土钢筋网(RPCSM)对负载下的RC足尺柱进行加固,设计制作了7根RC方柱试件,其中1根未加固对比柱、1根端部箍筋加密加固柱、2根RPCSM加固柱、3根端部箍筋加密RPCSM加固柱。考虑加固层厚度、钢筋网配筋率和端部箍筋加密对轴心受压RC柱性能的影响,进行了试验研究并分析了各试件的破坏模式、荷载-变形关系和应变变化规律。结果表明:加固柱的承载力提高了2.81~3.82倍;原混凝土柱与RPCSM加固层界面粘结可靠,共同工作良好;随着钢筋网配筋率的提高以及加固层厚度的增加,端部箍筋加密后整体性的提高,承载力和轴向变形能力提高,但延性有所下降。结合规范和破坏机理,给出了承载力计算公式,以促进该加固技术的推广。 展开更多
关键词 负载下加固 活性粉末混凝土 钢筋混凝土足尺柱 轴压性能 钢筋网 配筋率
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新型粉煤灰泡沫混凝土墙体轴心受压性能试验研究
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作者 郝贠洪 邬卓轩 +2 位作者 秦立达 孙浩 慈天义 《建筑结构》 北大核心 2024年第8期57-61,共5页
利用工业固废粉煤灰制备节能与承重一体的新型墙体,对无冷弯薄壁C型钢外包内置钢丝网片固废粉煤灰泡沫混凝土墙体FW、外包1mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰泡沫混凝土墙体CW1、外包2mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰... 利用工业固废粉煤灰制备节能与承重一体的新型墙体,对无冷弯薄壁C型钢外包内置钢丝网片固废粉煤灰泡沫混凝土墙体FW、外包1mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰泡沫混凝土墙体CW1、外包2mm厚冷弯薄壁C型钢内置钢丝网片固废粉煤灰泡沫混凝土墙体CW2分别在轴压作用下的破坏形态、荷载-位移曲线及墙体极限承载力进行试验研究。研究结果表明:从破坏形态度角度,FW、CW1及CW2在破坏时,冷拔钢丝、冷弯薄壁C型钢发生屈服,泡沫混凝土破裂;FW大面积泡沫混凝土挤压破碎剥落,破坏严重;CW2破坏时完整性优于FW、CW1。从变形角度,CW1、CW2外包的C型钢能够对墙体内部的泡沫混凝土起到约束作用,墙体的刚度得到提升。从承载力角度,CW2较CW1提升了17.4%,较FW提升了23.7%。对墙体的轴压承载力进行理论计算,与墙体轴心受压试验的实测值相比,二者误差在10%以内且小于实测值,满足国家现行规范、行业技术标准相关要求。 展开更多
关键词 泡沫混凝土墙体 冷弯薄壁C型钢 冷拔钢丝网片 轴心受压性能 极限承载力
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超亲水-水下超疏油ZnCo_(2)O_(4)-不锈钢的制备及油水分离性能研究
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作者 张跃忠 沈静 +2 位作者 张少华 武鹏鹏 刘宝胜 《表面技术》 EI CAS CSCD 北大核心 2024年第16期198-207,共10页
目的通过简易的方法制备耐久性的油水分离材料。方法采用水热-退火方法在不锈钢网(SSM)基底上制备了ZnCo_(2)O_(4)纳米针状阵列(ZnCo_(2)O_(4)-SSM)。利用扫描电镜、X射线衍射仪、傅里叶变换红外光谱仪、X射线光电子能谱和接触角测量仪... 目的通过简易的方法制备耐久性的油水分离材料。方法采用水热-退火方法在不锈钢网(SSM)基底上制备了ZnCo_(2)O_(4)纳米针状阵列(ZnCo_(2)O_(4)-SSM)。利用扫描电镜、X射线衍射仪、傅里叶变换红外光谱仪、X射线光电子能谱和接触角测量仪对油水分离材料的表面形貌、组分和表面润湿性进行了表征和研究。结果ZnCo_(2)O_(4)-SSM空气中水的接触角为0°,水下油的接触角≥155°,显示了超亲水-水下超疏油的特殊润湿性。ZnCo_(2)O_(4)-SSM呈现出优异的抗油污性能和重力驱动油水分离性能。对油-水混合物的分离效率大于99.8%,通量为3861~6114 L/(m^(2)·h),对水包油乳液的分离效率大于99.5%,通量为231~322 L/(m^(2)·h)。ZnCo_(2)O_(4)-SSM具有循环使用稳定性,在连续分离煤油-水混合物30次后,分离效率仍然能够达到99.8%以上。更重要的是,ZnCo_(2)O_(4)-SSM显示了优秀的长期稳定性、机械耐久性和强腐蚀环境耐久性(强酸,pH=1;强碱,pH=14;高盐,3.5%(质量分数)NaCl溶液)。结论ZnCo_(2)O_(4)-SSM以不锈钢网为载体,弥补了机械强度差的缺点。ZnCo_(2)O_(4)-SSM以高化学稳定的ZnCo_(2)O_(4)作为微纳米结构,提高了分离材料的耐久性。因此,ZnCo_(2)O_(4)-SSM制备方法简单,在工业含油污水的分离中具有很好的潜在应用前景。 展开更多
关键词 油水分离 不锈钢网 ZnCo_(2)O_(4) 耐久性 润湿性
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Influence of Reinforcement Mesh Configuration for Improvement of Concrete Durability 被引量:2
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作者 PAN Chong-gen JIN Wei-liang +3 位作者 MAO Jiang-hong ZHANG Hua SUN Li-hao WEI Dong 《China Ocean Engineering》 SCIE EI CSCD 2017年第5期631-638,共8页
Steel bar in concrete structures under harsh environmental conditions, such as chlorine corrosion, seriously affects its service life. Bidirectional electromigration rehabilitation (BIEM) is a new method of repair t... Steel bar in concrete structures under harsh environmental conditions, such as chlorine corrosion, seriously affects its service life. Bidirectional electromigration rehabilitation (BIEM) is a new method of repair technology for reinforced concrete structures in such chloride corrosion environments. By applying the BIEM, chloride ions can be removed from the concrete and the migrating corrosion inhibit can be moved to the steel surface. In conventional engineering, the concrete structure is often configured with a multi-layer steel mesh. However, the effect of the BIEM in such structures has not yet been investigated. In this paper, the relevant simulation test is carried out to study the migration law of chloride ions and the migrating corrosion inhibitor in a concrete specimen with complex steel mesh under different energizing modes. The results show that the efficiency of the BIEM increases 50% in both the monolayer steel mesh and the double-layer steel mesh. By using the single-sided BIEM, 87% of the chloride ions are removed from the steel surface. The different step modes can affect the chloride ion removal. The chloride ions within the range of the reinforcement protective cover are easier to be removed than those in the concrete between the two layers of steel mesh. However, the amount of migrating corrosion inhibitor is larger in the latter circumstances. 展开更多
关键词 bidirectional electromigration rehabilitation steel mesh chloride salt INHIBITOR
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矿用钢筋焊接网系统支护刚度的试验计算 被引量:2
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作者 周俊丽 袁宇光 《兵器材料科学与工程》 CAS CSCD 北大核心 2024年第1期102-106,共5页
为了研究矿用钢筋焊接网支护刚度特性,运用正交试验设计了以钢筋直径、钢筋网网格边长、钢筋型号为主的3因素3水平矿用钢筋焊接网支护刚度试验,采用方差分析及多元回归分析等方法,研究了钢筋直径A、钢筋网网格边长B、钢筋型号C 3个因素... 为了研究矿用钢筋焊接网支护刚度特性,运用正交试验设计了以钢筋直径、钢筋网网格边长、钢筋型号为主的3因素3水平矿用钢筋焊接网支护刚度试验,采用方差分析及多元回归分析等方法,研究了钢筋直径A、钢筋网网格边长B、钢筋型号C 3个因素对矿用钢筋焊接网支护刚度的影响。结果表明:矿用钢筋焊接网支护刚度为102.5~156.3 kN/m,3种因素对支护刚度影响排序为A>C>B,表明钢筋直径是影响支护刚度最主要的因素;拟合了3种因素对支护刚度的函数关系式,发现钢筋焊接网支护刚度与A呈二项式函数关系,与B呈三角函数关系,与C呈指数函数关系。 展开更多
关键词 钢筋焊接网 正交试验 方差分析 支护刚度
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钢网壳结构工程安装监测技术应用与应力分析 被引量:1
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作者 陈尚文 赵增超 +1 位作者 蔡吴和 曾强强 《智能建筑与智慧城市》 2024年第1期167-169,共3页
文章以南浔国际会展中心宴会厅钢网壳工程为例,阐述了钢网壳工程安装阶段结构健康监测的施工方案,并对监测应力数据进行分析。结果显示,根据项目实际情况进行科学布点监测,对于常规钢网壳施工具有良好的指导和预警效果;同时以底部-中部... 文章以南浔国际会展中心宴会厅钢网壳工程为例,阐述了钢网壳工程安装阶段结构健康监测的施工方案,并对监测应力数据进行分析。结果显示,根据项目实际情况进行科学布点监测,对于常规钢网壳施工具有良好的指导和预警效果;同时以底部-中部-顶部三区顺序分层设立支撑并安装的施工方案具有充分的安全性与可借鉴性。 展开更多
关键词 钢网壳 结构健康监测 应力分析
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KGM/CNF-不锈钢网油水分离材料的制备及其油水分离性能研究
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作者 刘磊 陈浩然 +2 位作者 王思佳 汪源浩 谭凤芝 《表面技术》 EI CAS CSCD 北大核心 2024年第14期199-206,215,共9页
目的在KGM/CNF包覆不锈钢网表面制备超亲水、水下超疏油功能材料,实现油水体系的分离。方法采用溶液浸泡法在不锈钢网上沉积魔芋葡甘聚糖(Konjac Gluco Mannan,KGM)/纤维素纳米纤维(CelluloseNanoFiber,CNF),构造超亲水/水下超疏油表面... 目的在KGM/CNF包覆不锈钢网表面制备超亲水、水下超疏油功能材料,实现油水体系的分离。方法采用溶液浸泡法在不锈钢网上沉积魔芋葡甘聚糖(Konjac Gluco Mannan,KGM)/纤维素纳米纤维(CelluloseNanoFiber,CNF),构造超亲水/水下超疏油表面。通过加热使KGM脱乙酰化、KGM/CNF分子间氢键重构、CNF在材料表面重新排布,制备了KGM/CNF-不锈钢网油水分离材料;利用扫描电镜、傅里叶变换红外光谱仪、X射线衍射仪和界面接触角对油水分离材料的表面形貌及物化性质进行了表征和研究,采用红外测油仪研究了油水分离性能。结果KGM/CNF-不锈钢网油水分离材料在空气中具有优异的超亲水性(WCA=0°)和水下超疏油性能(OCA≥151°)。通过油水分离性能研究发现,KGM/CNF-不锈钢网油水分离材料在自身重力下可以对大豆油、汽油等不同油水混合物进行高效分离,对油水混合物的分离效率可达97.40%,分离通量为1236.75L/(m^(2)·h)。结论KGM/CNF-不锈钢网油水分离材料以不锈钢网为载体,弥补了力学强度差的缺点,具有优异的油水分离性能以及良好的耐腐蚀性和循环使用性;该材料制备方法简单,制备过程绿色环保、成本低,在油水体系的分离中具有较好的潜在应用前景。 展开更多
关键词 油水分离 不锈钢网 接触角 魔芋葡甘聚糖 纤维素纳米纤维
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纳米二氧化硅改性不锈钢网用于油水分离
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作者 展悦 崔永岩 +1 位作者 王嘉宁 余正发 《精细化工》 EI CAS CSCD 北大核心 2024年第9期1933-1940,1957,共9页
以正硅酸乙酯为原料,采用溶胶-凝胶法制备了硅溶胶,将硅溶胶与预沉积聚多巴胺(PDA)的不锈钢网(SSM)反应,采用分步沉积和原位生长法制备了超亲水-水下超疏油不锈钢网(SSM-PDA-SiO_(2))。采用FTIR、XRD、TG、SEM和接触角测量仪对其进行了... 以正硅酸乙酯为原料,采用溶胶-凝胶法制备了硅溶胶,将硅溶胶与预沉积聚多巴胺(PDA)的不锈钢网(SSM)反应,采用分步沉积和原位生长法制备了超亲水-水下超疏油不锈钢网(SSM-PDA-SiO_(2))。采用FTIR、XRD、TG、SEM和接触角测量仪对其进行了测试。探究了硅溶胶反应时间对SSM-PDA-SiO_(2)亲水-疏油性能的影响,通过自重力驱动测试了其油水分离性能,考察了其循环分离性和力学稳定性。结果表明,PDA作为“桥梁”将纳米SiO_(2)沉积到SSM表面上,硅溶胶与SSM反应8 h制备的SSM-PDA-SiO_(2)-8具有最佳的亲水-疏油性能,水滴能在其表面60 ms内完全铺展,其对二氯甲烷等5种有机溶剂的水下油接触角在156.4°~160.9°之间,对二氯甲烷的滚动角为4.0°,表现出超亲水-水下超疏油特性。首次分离正庚烷/水的油水混合物水通量为40165 L/(m^(2)·h),分离效率99.3%,在50次分离循环时水通量为17728 L/(m^(2)·h),分离效率仍>98%。经过35次砂纸摩擦循环后,SSM-PDA-SiO_(2)-8保持了98%以上的分离效率。PDA的羟基、氨基等亲水基团提高了SSM-PDA-SiO_(2)的超亲水-水下超疏油特性,纳米SiO_(2)增加了其表面粗糙度。 展开更多
关键词 聚多巴胺 纳米SiO_(2) 油水分离 超亲水-水下超疏油性 不锈钢网 功能材料
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煤矿用钢网芯阻燃输送带的研制及性能
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作者 左英杰 张素艳 +2 位作者 李广 陈淼 余洪伟 《合成橡胶工业》 CAS 2024年第2期122-125,共4页
针对目前常见的煤矿用输送带存在的主要缺点研制了一种新型钢网芯阻燃输送带,研究了该输送带的纵向拉伸强度、黏合强度、表面电阻及阻燃性能。结果表明,所研制的钢网芯阻燃输送带的平均纵向拉伸强度为1214 N/mm;输送带工作面的平均黏合... 针对目前常见的煤矿用输送带存在的主要缺点研制了一种新型钢网芯阻燃输送带,研究了该输送带的纵向拉伸强度、黏合强度、表面电阻及阻燃性能。结果表明,所研制的钢网芯阻燃输送带的平均纵向拉伸强度为1214 N/mm;输送带工作面的平均黏合强度为13.5 kN/m,非工作面的平均黏合强度为11.4 kN/m;输送带工作面的平均表面电阻为3.3×10^(6)Ω,非工作面的平均表面电阻为4.8×10^(6)Ω;含完整覆盖层输送带的平均有焰燃烧时间和平均无焰燃烧时间均不长于3.0 s,剥去覆盖层输送带的平均有焰燃烧时间和平均无焰燃烧时间均不长于5.0 s。所研制输送带的各项指标均满足现行主要行业标准的相关规定。 展开更多
关键词 输送带 钢网芯 纵向拉伸强度 黏合强度 表面电阻 阻燃性能
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沿海地区30年龄期螺栓球网架加固技术研究 被引量:1
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作者 陈飞 赵学武 马馨鑫 《建筑技术》 2024年第6期695-699,共5页
某电厂干煤棚为斜放四角锥形双层筒网壳,属于螺栓球网架结构。因年久失修,结构本身锈蚀严重,须进行加固改造。采用“杆件更换、支座加固、彩钢板屋面更换”等方案施工。结构处于邻海环境中,重点关注后续使用期间耐久性,故对结构进行除... 某电厂干煤棚为斜放四角锥形双层筒网壳,属于螺栓球网架结构。因年久失修,结构本身锈蚀严重,须进行加固改造。采用“杆件更换、支座加固、彩钢板屋面更换”等方案施工。结构处于邻海环境中,重点关注后续使用期间耐久性,故对结构进行除锈防腐处理。结果表明,加固后的钢结构煤棚承载能力显著提升,可连续不间断满负荷运行168 h,投入使用后,钢构件防腐涂层无明显皱皮、流坠、气泡等缺陷,满足规范要求。 展开更多
关键词 干煤棚 钢结构 螺栓球网架 除锈防腐
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冲孔钢板网悬挑架施工技术研究
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作者 杜飞 《工程建设与设计》 2024年第16期140-142,共3页
冲孔钢板网悬挑架施工技术通过利用冲孔钢板网的高强度、轻质化和良好的稳定性,实现了施工过程中的快速安装、便捷调整和高效承载。论文以重庆洺悦芳华项目冲孔钢板网悬挑架施工为例,对冲孔钢板网悬挑架工程的施工技术进行了研究,探讨... 冲孔钢板网悬挑架施工技术通过利用冲孔钢板网的高强度、轻质化和良好的稳定性,实现了施工过程中的快速安装、便捷调整和高效承载。论文以重庆洺悦芳华项目冲孔钢板网悬挑架施工为例,对冲孔钢板网悬挑架工程的施工技术进行了研究,探讨了冲孔钢板网悬挑架的特点和优势,并详细阐述了该技术的施工技术原理以及施工工艺。 展开更多
关键词 冲孔钢板网 悬挑架 技术原理 施工工艺
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