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胶印印版的润湿要求和水斗溶液的关系
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作者 王新城 《中国印刷》 2002年第7期67-69,共3页
胶印印版经历了蛋白版、平凹版、PS版的推广使用阶段,随着印刷技术的高速发展、多色高速机的普及,PS版颇受欢迎,适合于一些大批量高档印刷产品,网点再现性能较好,暗调层次、亮调层次再现还原理想,PS版的稳定性好,不受环境温湿度的影响... 胶印印版经历了蛋白版、平凹版、PS版的推广使用阶段,随着印刷技术的高速发展、多色高速机的普及,PS版颇受欢迎,适合于一些大批量高档印刷产品,网点再现性能较好,暗调层次、亮调层次再现还原理想,PS版的稳定性好,不受环境温湿度的影响、保存期长、使用方便,晒版工艺简单,容易做到数据化、规范化控制,有很好的耐印率,并且网点再现性好、分辨率高、印刷适性好、用水量少、减少了纸张的伸缩与油墨的乳化。 展开更多
关键词 配方原则 润温液 胶印印版 湿要求 水斗溶
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Removal of Cesium and Strontium from Aqueous Solution by Natural Bentonite: Effect of pH, Temperature and Bentonite Treatment
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作者 O.A. Aldayel N.M. Alandis +2 位作者 W.K. Mekhemer J.A. Hefne S.S. Alenazi 《Journal of Environmental Science and Engineering》 2010年第4期1-10,共10页
Sorption of radioisotopes onto a stable colloidal phase may significantly enhance their transport in groundwater. The adsorption of cesium (Cs+) and strontium (St^++ ) from aqueous solutions onto commercial nat... Sorption of radioisotopes onto a stable colloidal phase may significantly enhance their transport in groundwater. The adsorption of cesium (Cs+) and strontium (St^++ ) from aqueous solutions onto commercial natural bentonite (NB) was studied as a function of contact time, temperature, bentonite mass and bentonite treatment (washing and heat treatment) on the uptake of these cations, independently. The heat treatment was 700 ℃ and washed bentonite samples termed by CB and WB respectively. Batch experiments results showed that the adsorptive capacity of NB at 293,298 and 308 K for Cs^+ and Sr^++ were 110,105, 104 and 35, 33.6, 31.8 mg/g respectively. The experimental results for strontium adsorption 293, 298 and 308 K fit well to a Langmuirian and Frendlich type isotherm but cesium adsorption fit better with Langmuir than Frendlich isotherm. Thermodynamic functions, the change of free energy (△G°), enthalpy (△H°) and entropy (AS°) of adsorption were also calculated for each cation. These parameters showed that the adsorption of Cs^+ and Sr^++ onto N B was feasible, spontaneous and exothermic. The adsorption of Sr^++ and Cs^+ increases with increasing pH (pH 2-8) and follows pseudo-second order kinetics reaching equilibrium after an equilibration time of 300 and 5 min respectively. The adsorbed amount of Cs^+ not affected by washing of NB but affected by the heat treatment. However the adsorbed amount of Sr^++ on WB was higher than NB and CB. 展开更多
关键词 Adsorption WASTEWATERS RADIOACTIVE CESIUM STRONTIUM natural bentonite isotherms kinetics thermodynamics.
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Sessile droplet freezing and ice adhesion on aluminum with different surface wettability and surface temperature 被引量:1
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作者 OU JunFei SHI QingWen +4 位作者 WANG ZhiLe WANG FaJun XUE MingShan LI Wen YAN GuiLong 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2015年第7期67-74,共8页
This paper focused on the sessile droplet freezing and ice adhesion on aluminum with different wettability (hydrophilic, com- mon hydrophobic, and superhydrophobic surfaces, coded as HIS, CHS, SHS, respectively) ove... This paper focused on the sessile droplet freezing and ice adhesion on aluminum with different wettability (hydrophilic, com- mon hydrophobic, and superhydrophobic surfaces, coded as HIS, CHS, SHS, respectively) over a surface temperature range of -9℃ to -19℃. It was found that SHS could retard the sessile droplet freezing and lower the ice adhesion probably due to the interfacial air pockets (IAPs) on water/SHS interface. However, as surface temperature decreasing, some IAPs were squeezed out and such freezing retarding and adhesion lowering effect for SHS was reduced greatly. For a surface temperature of-19℃, ice adhesion on SHS was even greater than that on CHS. To discover the reason for the squeezing out of lAPs, forces applied to the suspended water on IAPs were analyzed and it was found that the stability of IAPs was associated with surface mi- cro-structures and surface temperature. These findings might be helpful to designing of SHS with good anti-icing properties. 展开更多
关键词 SUPERHYDROPHOBIC ANTI-ICING ice adhesion interfacial air pockets
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