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磁力搅拌电火花加工工艺对镍钛合金表面特征及疏水性的影响 预览
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作者 冯超超 李丽 +3 位作者 赵玉刚 白雪 崔程 张岩 《中国表面工程》 EI CAS CSCD 北大核心 2019年第2期120-127,共8页
采用磁力搅拌电火花加工工艺在镍钛合金表面制备疏水性表面来提高其生物相容性,研究工艺参数对表面特征及疏水性的影响。采用扫描电子显微镜(SEM)对工件表面形貌进行分析,使用光学接触角测量仪和TR200粗糙度仪分别测量接触角和表面粗糙... 采用磁力搅拌电火花加工工艺在镍钛合金表面制备疏水性表面来提高其生物相容性,研究工艺参数对表面特征及疏水性的影响。采用扫描电子显微镜(SEM)对工件表面形貌进行分析,使用光学接触角测量仪和TR200粗糙度仪分别测量接触角和表面粗糙度值。结果表明:磁力搅拌电火花加工参数对表面形貌特征及疏水性影响显著。当电流为1.5 A时,表面熔凝凸起随脉宽的增大而增大,在脉宽为60μs时其表面含有尺寸合适的熔凝凸起,接触角达到峰值为138.2°;当电流为4.5 A时,表面富含气孔特征,表面气孔的深度在脉宽为60μs时达到最大值,其表面接触角为133.6°。表面粗糙度对疏水性能无直接影响。采用磁力搅拌电火花加工工艺,可以大幅提升镍钛合金表面的疏水性。 展开更多
关键词 电火花 磁力搅拌 镍钛合金 多孔 疏水性
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Magnetic separation of pentlandite from serpentine by selective magnetic coating 预览
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作者 Ji-wei Lu Zhi-tao Yuan +2 位作者 Xiao-fei Guo Zhong-yun Tong Li-xia Li 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第1期1-10,共10页
In this study,pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH,stirring speeds,magnetic field intensities,and dosages of sodium hexametaphosphate(S... In this study,pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH,stirring speeds,magnetic field intensities,and dosages of sodium hexametaphosphate(SHMP)and sodium oleate(SO).A magnetic concentrate with Ni grade of 20.8%and Ni recovery of 80.5%was attained under the optimized operating conditions.Considering the above,the adsorption behaviors of SHMP and SO and the surface properties of minerals after the magnetic coating were studied by Fourier transform infrared(FTIR)spectroscopy,X-ray diffraction(XRD),and scanning electron microscopy(SEM).The results show that magnetite was preferentially coated on the pentlandite surfaces and sparingly coated on the serpentine surfaces in the presence of SHMP and SO.Furthermore,calculations by Derjaguin-Landau-Verwey-Overbeek(DLVO)theory indicate that the preferential adsorption of magnetite on the pentlandite surfaces is due to the presence of a hydrophobic interaction between the magnetite and pentlandite,which is much stronger than the interaction between magnetite and serpentine. 展开更多
关键词 DISPERSANT COAGULANT MAGNETIC COATING MAGNETIC separation hydrophobic interaction
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Micromorphology and physicochemical properties of hydrophobic blasting dust in iron mines 预览
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作者 Jian-guo Liu Long-zhe Jin +3 位作者 Jia-ying Wang Sheng-nan Ou Jing-zhong Guo Tian-yang Wang 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第6期665-672,共8页
The micromorphology and physicochemical properties of hydrophobic blasting dust(HBD)from an iron mine were comprehensively analyzed by laser particle size analysis(LPSA),scanning electron microscopy(SEM),X-ray diffrac... The micromorphology and physicochemical properties of hydrophobic blasting dust(HBD)from an iron mine were comprehensively analyzed by laser particle size analysis(LPSA),scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS).The results show that the HBD particles can be classified into three types based on their particle size(PS):larger particles(PS>10μm),medium particles(1μm≤PS≤10μm),and nanoparticles(PS<1μm).The cumulative volume of respirable dust(PS≤10μm)was 84.45%.In addition,three shapes of HBD were observed by SEM:prism,flake,and bulk.In particular,the small particles were mostly flaky,with a greater possibility of being inhaled.Furthermore,the body and surface chemical compounds of HBD were determined by XRD and XPS,respectively.Ammonium adipate(C6H16N2O4)was the only organic compound in the body of HBD,but its mass fraction was only 13.4%.However,the content of organic C on the surface of HBD was 85.35%.This study demonstrated that the small-particle size and large amount of organic matter on the surface of HBD are the main reasons for its hydrophobicity,which can provide important guidance for controlling respirable dust in iron mines. 展开更多
关键词 iron MINE DUST respirable DUST HYDROPHOBIC BLASTING DUST microstructure PHYSICOCHEMICAL properties particle size
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Impacts of Wettability on Immiscible Fluid Flow Pattern-Microfluidic Chip Experiment 预览
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作者 Zheng Xianglei Jang Jaewon 《中国炼油与石油化工:英文版》 SCIE CAS 2019年第1期80-89,共10页
Immiscible fluid flow is frequently found in resource recovery or soil remediation. The flow pattern in the porous media is affected by the wettability of pore surface. In this study, quartz substrates and microfluidi... Immiscible fluid flow is frequently found in resource recovery or soil remediation. The flow pattern in the porous media is affected by the wettability of pore surface. In this study, quartz substrates and microfluidic chips are treated by silica nanoparticles(SNP) and triethoxy(octyl)silane(TES) to fabricate the water-wet and oil-wet surfaces. The wettability of the treated-surface is measured in term of contact angle for several combinations of surrounding fluid and a liquid droplet. The effect of the wettability on the fluid flow pattern is explored by injecting oil and water alternately into the surface-treated microfluidic chips. The results reveal that the SNP-coated quartz substrate shows strong water-wet property and the TES coating makes water-repellent/oil-wet surfaces. In addition, it is found that the maximum and minimum oil and water saturation during alternate injection of oil and water depends on the surface wettability of the microfluidic chips. The characteristics of the pore-scale fluid flow pattern are also described. 展开更多
关键词 WETTABILITY contact angle nanoparticle coating HYDROPHILIC HYDROPHOBIC microfluidic chip
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Effects of Main-chain and Chain-ends on the Organogelation of Stearoyl Appended Pendant Valine Based Polymers
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作者 Mridula Nandi Swagata Pan +1 位作者 Dipannita Ghosh Priyadarsi De 《高分子科学:英文版》 SCIE CAS CSCD 2019年第9期903-911,共9页
In this work, we investigated the effect of hydrophobic interactions between the polymeric backbone and chain-end groups on the self-assembly pathway of stearoyl appended side-chain valine (Val)-based poly(methacrylat... In this work, we investigated the effect of hydrophobic interactions between the polymeric backbone and chain-end groups on the self-assembly pathway of stearoyl appended side-chain valine (Val)-based poly(methacrylate/acrylate) homopolymers in different organic hydrocarbons. Gelation studies conducted revealed that while polymers with polyacrylate as backbone induces gelation in several organic hydrocarbons, polymers with polymethacrylate in the main-chain significantly hinders macroscopic gelation. Morphology of the organogels was analysed by field emission scanning electron microscopy (FESEM), and mechanical strengths of the organogels were determined by rheological measurements. Reversible addition-fragmentation chain transfer (RAFT) polymerization chain transfer agents (CTA)s,[R1 —S—C=(S)—S—R2] with different —Ri and — R2 groups, have been employed to study the effect of structural variation at the chain-end on macroscopic assembly mechanism. We found that the additional interactions between terminal groups via hydrogenbonding or n-n stacking interactions or both help to build up the self-assembly pathway and thereby produces mechanically stable organogels. 展开更多
关键词 Organogelation HYDROPHOBIC interactions Poly (methacrylate/aery late) BACKBONE RAFT polymerization Self-assembly
鸡白汤多肽序列组成与乳化性能相关性研究 预览
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作者 段娜娜 张天睿 +1 位作者 廖永红 周晓宏 《食品科学技术学报》 CAS CSCD 北大核心 2019年第1期41-46,共6页
为了研究鸡汤乳化液中多肽序列组成与乳化性能之间的关系,通过炖煮鸡骨架3h获得鸡白汤,离心得到稳定的乳化液层,经过除脂、微滤处理,得到乳化多肽溶液。分析发现多肽的平均长度为13个氨基酸残基,临界胶束浓度值为4mg/mL。乳化多肽溶液经... 为了研究鸡汤乳化液中多肽序列组成与乳化性能之间的关系,通过炖煮鸡骨架3h获得鸡白汤,离心得到稳定的乳化液层,经过除脂、微滤处理,得到乳化多肽溶液。分析发现多肽的平均长度为13个氨基酸残基,临界胶束浓度值为4mg/mL。乳化多肽溶液经3kDa超滤离心管过滤后,进行高效液相色谱质谱法序列分析,获得1646条多肽序列。统计发现乳化多肽平均疏水度为4791.70kJ/mol,亲水性氨基酸和疏水性氨基酸组成比例接近,疏水性氨基酸或亲水性氨基酸占比很高的多肽数量较少,强亲水性氨基酸和强疏水性氨基酸在多肽序列中的占比不高,多肽两端亲水性氨基酸较多。该研究旨在为新型多功能多肽表面活性剂的开发提供理论依据。 展开更多
关键词 鸡汤 多肽 乳化 亲水性 疏水性 表面活性剂
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Evaluation on Self-healing Mechanism and Hydrophobic Performance of Asphalt Modified by Siloxane and Polyurethane
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作者 周新星 SUN Bin +3 位作者 WU Shaopeng ZHANG Xiao LIU Quantao 肖月 《武汉理工大学学报:材料科学英文版》 SCIE EI CAS 2019年第3期630-637,共8页
In order to inhibit and remove the thin ice and extend the lifetime of the damaged bridge, the self-healing mechanism and hydrophobic performance of asphalt modified by siloxane and polyurethane (ASP) were studied by ... In order to inhibit and remove the thin ice and extend the lifetime of the damaged bridge, the self-healing mechanism and hydrophobic performance of asphalt modified by siloxane and polyurethane (ASP) were studied by dynamic shear rheology (DSR), fluorescence microscope (FM), atomic force microscope (AFM), the fracture-healing-re-fracture test and molecular simulations. The experimental results indicated that the selfhealing capability of ASP increased with increasing heating time and temperature. Furthermore, the addition of siloxane could improve the reaction energy barrier and complex modulus, and it is believed that the self-healing is a viscosity driven process, consisting of two parts namely crack closure and properties recovery. Contact angle of ASP increased with the increasing siloxane content and it deduced that the siloxane could improve the hydrophobic performance of ASP and the ASP molecule model could simulate well the self-healing mechanism and hydrophobic performance of ASP. 展开更多
关键词 HYDROPHOBIC ASPHALT SELF-HEALING MECHANISM molecule model SILOXANE and POLYURETHANE dynamic shear rheology atomic force microscope
高耐候易清洁粉末涂料的研究 预览
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作者 欧阳建群 高庆福 +1 位作者 陈嘉壕 马会刚 《涂层与防护》 2019年第1期21-22,23-26共3页
主要针对易清洁粉末的使用环境和使用要求,从易清洁粉末疏水疏油原理出发,选择合适的树脂、异氰酸酯与助剂,探讨了不同树脂配比对易清洁效果的影响。最终研制出具备优良耐候性能、耐溶剂性能优异、疏水性能和疏油性能良好的易清洁粉末... 主要针对易清洁粉末的使用环境和使用要求,从易清洁粉末疏水疏油原理出发,选择合适的树脂、异氰酸酯与助剂,探讨了不同树脂配比对易清洁效果的影响。最终研制出具备优良耐候性能、耐溶剂性能优异、疏水性能和疏油性能良好的易清洁粉末涂料。 展开更多
关键词 粉末涂料 易清洁 疏水 疏油 耐溶剂性
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经编双面绒织物的疏水整理研究 预览
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作者 李枫裕 陈慰来 陈梦颖 《现代纺织技术》 2019年第5期73-79,共7页
为赋予绒织物疏水性能,采用不同的工艺对经编双面绒织物进行疏水整理,以DTY(83.33 dtex)为原料,经过整经、织造、染色、起绒等工序设计经编双面绒织物,以SiO2构建粗糙结构,硅烷偶联剂水解液降低纤维表面张力。采用扫描电镜(SEM)、红外光... 为赋予绒织物疏水性能,采用不同的工艺对经编双面绒织物进行疏水整理,以DTY(83.33 dtex)为原料,经过整经、织造、染色、起绒等工序设计经编双面绒织物,以SiO2构建粗糙结构,硅烷偶联剂水解液降低纤维表面张力。采用扫描电镜(SEM)、红外光谱(FT-IR)等测试手段对其表观结构及改性效果进行研究,对织物的基本物理机械性能以及耐洗涤性能进行测试。结果表明:在纤维表面观察到粗糙结构的存在,同时在纤维表面出现了硅烷偶联剂烷基长链的伸缩振动峰,显示水解后的硅烷偶联剂成功吸附在织物表面;在两步法疏水整理中,采用HDTMS对织物进行疏水整理效果明显好于KH570;同时,质量分数3%HDTMS一步法整理织物又能获得更好的疏水效果;不同工艺整理的疏水织物经10次洗涤后水接触角有一定下降,耐久性有待进一步提升。 展开更多
关键词 双面绒 水接触角 硅烷偶联剂 粗糙结构 表面张力疏水
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Separation process study of liquid phase catalytic exchange reaction based on the Pt/C/PTFE catalysts
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作者 Peilong Li Li Guo +7 位作者 Renjin Xiong Junhong Luo Ming Wen Yong Yao Zhi Zhang Jiangfeng Song Yan Shi Tao Tang 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第8期1837-1845,共9页
The liquid phase catalytic exchange(LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum c... The liquid phase catalytic exchange(LPCE) reaction is an effective process for heavy water detritiation and production of deuterium-depleted potable water. In the current study, hydrophobic carbon-supported platinum catalysts(Pt/C/PTFE) with high efficiency as reported previously for LPCE were prepared and comprehensive performance evaluation method is applied to evaluate the separation behaviors of LPCE systematically. Experimental results indicate that the optimum reaction temperature of 60–80℃ and the molar feed ratio G/L of 1.5–2.5 would lead to higher separation efficiencies. As to the packing method, a random packing mode with a packing ratio of hydrophobic catalysts 0.25 is recommended. In addition, thermodynamic analysis corresponds well with experimental results under lower temperature and G/L, while the suppression of kinetic factors should not be neglected when T > 80℃ and G/L > 1.5. 展开更多
关键词 Liquid phase catalytic exchange(LPCE) Hydrophobic carbon-supported platinum CATALYSTS Separation behaviors Optimal operating condition Water detritiation
Remediation of Organochlorine Pesticide-Contaminated Soils by Surfactaut-Enhanced Washing Combined with Activated Carbon Selective Adsorption
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作者 ZHANG Shengtian HE Yue +7 位作者 WU Linna WAN Jinzhong YE Mao LONG Tao YAN Zhou JIANG Xin LIN Yusuo LU Xiaohua 《土壤圈:英文版》 SCIE CAS CSCD 2019年第3期400-408,共9页
Remediation of organochlorine pesticide (OCP)-contaminated soils is urgently required especially in China. The present study investigated the removal of OCPs from two soils by triton X-100 (TX- 100)-enhanced washing c... Remediation of organochlorine pesticide (OCP)-contaminated soils is urgently required especially in China. The present study investigated the removal of OCPs from two soils by triton X-100 (TX- 100)-enhanced washing coupled with powdered activated carbon (PAC) adsorption treatment of the solution. Two contaminated soils, including a silt clay contaminated w计h chlordene, dichloro- 2,2-6is(p-chlorophenyl)ethanes (DDDs), and dichlorodiphenyltrichloroethane (DDT) and a sandy loam containing chlordanes and mirex, were selected. Effects of varied operating parameters, including TX-100 dosage, liquid/soil (L/S) ratio, and extraction time, on the contaminant removal were examined. For both soils, OCP removal was clearly enhanced with increasing TX-100 in extraction solution and L/S ratio. Meanwhile, the removal efficacy was also impacted by soil texture and characteristics and contents of the contaminants. Moreover, by using PAC as an absorbent, a significant decrease in the contaminants in the extraction solutions was detected, and TX-100 could be further reused. Our investigation suggests that surfactant-enhanced washing combined with activated carbon selective adsorption would be an alternative to remediate OCP-contaminated soils. 展开更多
关键词 chlordene DICHLORODIPHENYLTRICHLOROETHANE hydrophobic organic chemicals powdered activated carbon sodium dodecyl benzene SULFONATE TRITON X-100
顶板富水条件下巷道掘进支护技术研究 预览
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作者 安彦霖 《煤矿现代化》 2019年第4期35-37,40共4页
针对111801工作面顺槽顶板岩层在富水条件下,围岩强度降低支护困难问题,通过采取围岩分段控制技术并结合疏水与导水措施对巷道围岩进行综合支护。现场工业性试验结果表明,最终顶板下沉量为142mm,两帮移近量为86mm,底鼓量为34mm,围岩变... 针对111801工作面顺槽顶板岩层在富水条件下,围岩强度降低支护困难问题,通过采取围岩分段控制技术并结合疏水与导水措施对巷道围岩进行综合支护。现场工业性试验结果表明,最终顶板下沉量为142mm,两帮移近量为86mm,底鼓量为34mm,围岩变形量处于可控范围,锚杆(索)受力良好,有效控制了巷道围岩变形。 展开更多
关键词 富水条件 分段控制 疏水 导水 围岩控制
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基于光固化微压印制备仿生荷叶疏水薄膜的研究 预览
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作者 佟金戈 贺建芸 +3 位作者 李嘉维 张景慧 王佳佳 谢鹏程 《塑料工业》 CAS CSCD 北大核心 2019年第10期139-142,共4页
采用光固化微压印制备仿生疏水薄膜的工艺方法,制备了具有荷叶表面微结构的聚二甲基硅氧烷(PDMS)软模具,在此基础上,制备了仿生疏水薄膜,探究了紫外光辐照时间、辐照强度等对疏水薄膜水接触角的影响。结果表明,PDMS模具能够较好地复印... 采用光固化微压印制备仿生疏水薄膜的工艺方法,制备了具有荷叶表面微结构的聚二甲基硅氧烷(PDMS)软模具,在此基础上,制备了仿生疏水薄膜,探究了紫外光辐照时间、辐照强度等对疏水薄膜水接触角的影响。结果表明,PDMS模具能够较好地复印荷叶表面的微结构,增加辐照时间和辐照强度改变压印压力可以有效提高疏水薄膜的疏水性,当辐照强度为1 000 mW/cm~2、压印压力为0.2 MPa、辐照时间为20 s时,制备的仿生疏水薄膜的表面接触角达到153.5°。 展开更多
关键词 光固化 疏水 微压印 仿生 接触角
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Intestinal uptake of barley protein-based nanoparticles for β-carotene delivery
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作者 Guangyu Liu Ying Zhou Lingyun Chen 《药学学报:英文版》 CSCD 2019年第1期87-96,共10页
Our previous study introduced a barley protein microparticle for encapsulation of hydrophobic drug/nutraceutical, which could release nanoparticles upon gastric digestion and deliver encapsulated compound to a simulat... Our previous study introduced a barley protein microparticle for encapsulation of hydrophobic drug/nutraceutical, which could release nanoparticles upon gastric digestion and deliver encapsulated compound to a simulated intestinal environment intact. This work focused on evaluating the potential of liberated nanoparticles to improve the absorption of encapsulated compounds(e.g., β-carotene) using in vitro Caco-2 cell and ex vivo small intestine models. Nanoparticles obtained from gastric digestion of barley protein microparticles had a spherical shape and an average size of 351 nm. Nanoparticles showed low cytotoxicity in Caco-2 cells and their cellular uptake was dependent on time, concentration and temperature. In a Caco-2 cell monolayer model, significantly greater uptake and transport of β-carotene were observed when it was delivered by nanoparticles(15%), compared to free β-carotene suspension(2.6%). In an ex vivo rat jejunum model, nanoparticles showed the capacity to retain in small intestinal tissue. Approximately 2.24 and 6.04 μg nanoparticle were able to permeate through each cm2 intestinal tissue and translocate to the serosal side after 60 and 90 min, respectively. Results from this study demonstrated the absorption improving effect of the barley protein nanoparticles and suggested their potential as vehicles for hydrophobic compounds. 展开更多
关键词 BARLEY protein NANOPARTICLES HYDROPHOBIC CACO-2 cell INTESTINAL transport
基于1,8-萘酰亚胺基团的水性荧光聚氨酯的合成与性能研究
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作者 刘政 高爱芹 +1 位作者 谢孔良 侯爱芹 《染料与染色》 CAS 2019年第5期5-10,共6页
本论文以异佛尔酮二异氰酸酯(IPDI),2,2′-双羟甲基丙酸(DMPA)和1,4-丁二醇(BDO)为硬段,以聚(碳酸1,6-己二醇)酯二醇(PCDL)为软段,将两端带有羟基的1,8-萘酰亚胺衍生物MM4嵌入聚氨酯链中,合成了一系列包含不同MM4含量的新型水性荧光聚... 本论文以异佛尔酮二异氰酸酯(IPDI),2,2′-双羟甲基丙酸(DMPA)和1,4-丁二醇(BDO)为硬段,以聚(碳酸1,6-己二醇)酯二醇(PCDL)为软段,将两端带有羟基的1,8-萘酰亚胺衍生物MM4嵌入聚氨酯链中,合成了一系列包含不同MM4含量的新型水性荧光聚氨酯乳液。通过傅立叶变换红外光谱(FT-IR)证实了MM4成功嵌入聚氨酯链段中。探讨了MM4含量与聚氨酯膜各项性能的关系。结果表明,随着MM4含量的增加,WPU乳液的荧光强度逐渐增大。加入MM4后WPU膜的疏水性、拉伸强度和热稳定性随之增强,吸水率和断裂伸长率随之降低,鲜艳度增强。 展开更多
关键词 聚氨酯 水性 荧光 疏水
绿藻对交流复合绝缘子伞裙表面形貌及憎水性的影响机理 预览 被引量:1
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作者 谢从珍 李超红 +2 位作者 曾磊磊 杨挺 夏云峰 《电工技术学报》 EI CSCD 北大核心 2019年第4期831-837,共7页
藻类在绝缘子上附生引起国内外专家学者越来越广泛的关注,藻类作为一种特殊的生物污秽对复合绝缘子性能的影响尚不明确。本文以广东地区伞裙附生绿藻的500kV交流复合绝缘子为样品,分析了绿藻在复合绝缘子上的分布规律。通过静态接触角、... 藻类在绝缘子上附生引起国内外专家学者越来越广泛的关注,藻类作为一种特殊的生物污秽对复合绝缘子性能的影响尚不明确。本文以广东地区伞裙附生绿藻的500kV交流复合绝缘子为样品,分析了绿藻在复合绝缘子上的分布规律。通过静态接触角、EPMA电子探针和扫描电镜测试,研究了绿藻对硅橡胶伞裙表面形貌及憎水性的影响机理。结果表明,绿藻生物层对憎水性小分子迁移的阻碍作用导致绿藻附生的伞裙区域憎水性完全丧失。绿藻细胞的粘附行为与硅橡胶自然老化协同作用使伞裙表面形成特殊的鳞片状结构。绿藻附着层可延缓伞裙表面裂缝和凹陷往纵深发展。 展开更多
关键词 复合绝缘子 绿藻 憎水性 微观形貌 生物粘附
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纳米疏水材料的研究现状 预览
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作者 莫宜澄 张钦发 +1 位作者 菅田田 宁慧男 《应用化工》 CAS CSCD 北大核心 2019年第6期1479-1482,共4页
论述了对无机有机纳米颗粒进行疏水改性,并喷涂、浸涂至各种基材上形成涂层,将纳米颗粒沉积形成薄膜,对两种纳米疏水材料的研究现状和应用进展进行展望。
关键词 纳米颗粒 疏水 涂层 薄膜
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电厂主蒸汽系统疏水阀门内漏诊断及处理
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作者 吴伟志 李志鹏 任羽皓 《电站系统工程》 2019年第1期31-33,共3页
发电机组电动主汽门前、后疏水系统的电动截止疏水总门阀体温度多年一直偏高,疑为阀门发生内漏,经更换阀门,阀体温度依旧偏高,对阀体进行解体发现阀门没有发生内漏,对疏水管路进行了试验,分析试验结果发现,阀体温度过高是由不合理的管... 发电机组电动主汽门前、后疏水系统的电动截止疏水总门阀体温度多年一直偏高,疑为阀门发生内漏,经更换阀门,阀体温度依旧偏高,对阀体进行解体发现阀门没有发生内漏,对疏水管路进行了试验,分析试验结果发现,阀体温度过高是由不合理的管阀布局引起的。并针对管阀布局提出了改进措施,为解决电厂阀门温度过高问题提供了参考。 展开更多
关键词 管路 疏水 复合阀 应用
低温固化疏水/石墨烯防腐粉末涂料的研究 预览 被引量:1
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作者 卜庆朋 汪小强 潘建良 《涂层与防护》 2019年第4期22-22,23-27,39共3页
以环氧E-12为基体树脂,改性酚类为固化剂,K-7318为固化促进剂,可有效降低固化温度;以SA-186为粗糙剂,加入经1H,1H,2H,2H-全氟辛基三乙氧基硅烷修饰的纳米SiO2和氟蜡,可有效提高疏水性;加入适量石墨烯,可有效提高防腐性能。通过熔融挤出... 以环氧E-12为基体树脂,改性酚类为固化剂,K-7318为固化促进剂,可有效降低固化温度;以SA-186为粗糙剂,加入经1H,1H,2H,2H-全氟辛基三乙氧基硅烷修饰的纳米SiO2和氟蜡,可有效提高疏水性;加入适量石墨烯,可有效提高防腐性能。通过熔融挤出、磨粉,成功制备了低温固化超疏水防腐粉末涂料。通过SEM、TEM、中性盐雾、耐冲击、接触角测试等方法对低温固化超疏水防腐涂层性能进行了表征和测试,考察了固化剂及固化促进剂对固化温度的影响;考察了改性纳米SiO2、氟蜡和石墨烯用量对涂层疏水性和防腐性的影响。结果表明,经优化后的涂层具有优异的疏水性、防腐性能和机械性能。 展开更多
关键词 低温固化 固化促进剂 超疏水 防腐
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Corrosion Properties of Calcium Stearate-Based Hydrophobic Coatings on Anodized Magnesium Alloy
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作者 Yu-Fen Zhang Sha-Wei Tang +2 位作者 Tie-Gui Lin Guang-Yi Liu Jin Hu 《金属学报:英文版》 SCIE EI CAS CSCD 2019年第9期1111-1121,共11页
A calcium stearate-based hydrophobic coating was formed on an anodized magnesium alloy by the electrodeposition method.The influences of the working voltages on the characteristics of the coatings were researched.The ... A calcium stearate-based hydrophobic coating was formed on an anodized magnesium alloy by the electrodeposition method.The influences of the working voltages on the characteristics of the coatings were researched.The results indicate that the working voltages have significant effects on the morphology,thickness,roughness,and wettability of the hydrophobic coatings,but little influence on the phase composition.Higher working voltages promote the nucleation of the coatings during the deposition process.The thickness,roughness,and water contact angle of the coatings increase with the increase in working voltage.In addition,the influences of the working voltages on the corrosion properties and corrosion mechanisms of the coated magnesium alloys are discussed in detail.When the working voltage is 50 V,the best corrosion resistance is obtained,but when the working voltages are 20 V and 100 V,respectively,a low corrosion resistance is obtained because of the presence of the thinner and cracked coating on the substrate surfaces. 展开更多
关键词 IMPEDANCE spectroscopy MAGNESIUM alloy CORROSION resistance ELECTRODEPOSITION HYDROPHOBIC coating
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