LI Jing HUANG Kexiong CHEN Xinmin Central South University of Technology
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Changsha
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China
金属学报(英文版)
The interfacial tension between FeO-CaO-SiO_2-MgO system slag and Cu-Fe-S system matte was determinated by the X-ray radiograph sessile drop method.The effects of FeO/SiO_2 ratio in the slag,contents of CaO,FeO,ZnO and CaF_2 in the slag on interracial tension and the relation of inter facial tension with the grade of matte and temperature have been studied.The floatation coefficient and film coefficient of slag-matte system has been calculated and the mechanism of the transition of iron and oxygen from slag to matte has also been discussed.
关键词:
interfacial tension
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null
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null
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null
LI Jing HUANG Kexiong WANG Zaoji LIU Jun Central South University of Technology
,
Changsha
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ChinaGUO Chuntai Changchun Institute of Applied Chemistry
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Academia Sinica
,
Changchun
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China LI Jing Professor
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Faculty of Metallurgical Physical Chemistry
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Central South University of Technology
,
Changsha 410012
,
China
金属学报(英文版)
Interfacial tension between liquid Al and molten fluoride salt was determined using sessile drop method combined with X-ray radiograph.A computer program of curve-fitting for coordination of configuration of sessile drop was used in the picture processing of the sessile drop.Regressive equation were worked out to calculate the density of the molten salt.The in- fluence of mole ratio of NaF/AlF_3,content of Li_2CO_3 and rare-earth oxides in the molten salt on interfacial tension of Al-salt was discussed.The contact angles of liquid Al on the sur- face of graphite,graphitized carbon cathode and the graphite with coating of TiB_2 were de- termined.
关键词:
interfacial tension
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null
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null
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null
LIU Jincai LU Jiufang Tsinghua University
,
Beijing
,
China
金属学报(英文版)
The activity coefficients of all the components in H_2SO_4-CuSO_4 solution were calculated by using Pitzer's equation.Six Pitzer's mixing parameters μ and were evaluted.The change of the activity and concentration of the ions during extraction was measured by drop weight method.The interfacial excesses of all the components were calculated from the interfacial tension equation which is expressed in terms of activities of every components.Results show that H~+ and Cu~(2+) are positively adsorpted by CuR_2,(HR)_2 ,SO_4~(2-) and HSO_4~- are negatively adsorpted on the interface.
关键词:
extraction kinetics
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null
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null
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null
安红妍
,
张楚华
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王宁宁
工程热物理学报
具有介观特性的格子Boltzmann方法能够准确方便地捕捉相界面细节,在两相流动领域具有广泛的应用前景.本文在简要介绍格子Boltzmann方法的基础上,利用格子Boltzmann方法的颜色模型对四类经典两相流动问题进行了模拟:界面张力的Laplace定律验证、单液滴松弛过程、两个液滴融合过程、水平通道内不混溶液液两相流动.结果表明:液滴界面张力符合Laplace定律;黏性越大,液滴松弛过程越稳定;界面张力越大,液滴融合速度越快;格子Boltzmann方法能够有效描述液液两相流动的界面信息.研究工作为应用格子Boltzmann方法分析两相流动问题奠定了理论基础.
关键词:
格子Boltzmann模型
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颜色模型
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液液两相流动
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界面张力
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液滴
李晶
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黄克雄
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王造吉
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刘军
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郭春泰
金属学报
用X射线座滴照像法测量了铝液-氟化物熔盐间的界面张力。采用曲线拟合液滴轮廓坐标的计算机程序处理座滴图像。用逐步回归分析方法获得了计算熔盐密度值的回归方程。讨论了熔盐中NaF/AlF_3分子比,Li_2CO_3和稀土氧化物含量对熔盐-铝液间界面张力的影响。测量了铝液在熔盐中对石墨、工业碳块以及TiB_2涂层的润湿角。
关键词:
铝
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contact angle
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Al
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molten salt
丁伟
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李金红
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于涛
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邢欣欣
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张微
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杨柳
应用化学
doi:10.3724/SP.J.1095.2013.20605
采用自制的新型磺基甜菜碱两性表面活性剂与相对分子质量2500万的聚丙烯酰胺进行复配,考察了不同温度和矿化度条件下,聚合物对复配溶液表面、界面性能的影响.采用滴体积法测定了溶液的表面张力,结果表明,加入聚合物使溶液的临界胶束浓度增大,且复配溶液的表面张力大于单独表面活性剂溶液的表面张力.当聚合物浓度一定,增大溶液矿化度时,体系表面张力增大.用旋滴型界面张力仪测定了溶液的界面张力,结果表明,增大聚合物浓度,油水界面张力增大,增大溶液矿化度,油水界面张力有所升高.聚合物质量浓度为1.5 g/L,表面活性剂质量浓度为0.3 g/L时,可使胜利油田孤岛原油和孤东原油的油水界面张力达到超低数量级(10-3 mN/m).用分水时间法测定了溶液的乳化性能,结果表明,聚合物浓度增大,分水时间延长,并考察了75、85和95℃条件下体系的乳化性能,温度越高,分水时间越短.
关键词:
表面活性剂
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聚丙烯酰胺
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聚合物
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表面张力
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界面张力
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乳化性能
丁伟
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宋成龙
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李博洋
应用化学
doi:10.11944/j.issn.1000-0518.2015.08.140439
以壬基酚、环氧氯丙烷、二甲胺和3-氯-2-羟基丙磺酸钠为原料,在催化剂的作用下经醚化、叔胺化、季铵化,合成了壬基酚甜菜碱两性表面活性剂(NSZ),并确定了最佳的反应条件.壬基酚氯醇醚的最佳合成条件:物料比n(壬基酚)∶n(环氧氯丙烷)=1∶4,催化剂四丁基溴化铵用量为壬基酚用量的4％(摩尔比),反应时间为4h,反应温度为95℃.壬基酚叔胺的最佳合成条件:物料比为n(壬基酚氯醇醚)∶n(二甲胺)∶n(氢氧化钠)=1∶2.5∶1.1,反应时间为4h,反应温度为60℃.NSZ的最佳合成条件:以异丙醇/水为溶剂且其体积比为2∶1,反应温度为85℃,反应时间24 h,n(3-氯-2羟基丙磺酸钠)∶n(壬基酚叔胺)=1.2∶1,反应体系的pH值为8～9.通过测定NSZ在高温高矿化度条件下的界面性能、乳化性能和热稳定性,证明了NSZ具有良好的耐温抗盐性能.
关键词:
壬基酚
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两性表面活性剂
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界面张力
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乳化性
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热稳定性
姚晓
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陈诚
,
赵波
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韩世寰
高分子材料科学与工程
为研究聚合物表面活性剂(聚表剂)分子结构变化对聚表剂和油-水界面性质的影响,优选出最佳性能的聚表剂.以正十六烷基为油相,水为水相,采用耗散颗粒动力学方法(DPD)模拟含有不同可聚合季铵盐表面活性基团的聚表剂在油-水界面的性质,研究了聚表剂摩尔分数及季铵盐基团种类等因素对油-水界面性质的影响.模拟结果表明,模拟体系中聚表剂摩尔分数范围以0.02～～0.06为宜;通过模拟优选出最佳季铵盐单体为对甲基苯乙烯基十二烷基二甲基溴化铵(R4),聚表剂AMR4在油水体系中最佳摩尔分数为0.06,此时界面张力值最低、界面效率最佳且聚表剂分子均方根末端距最大.聚表剂分子几乎全都分布在油-水界面层,其界面活性使得油-水界面厚度增大,油-水界面张力降低.
关键词:
耗散颗粒动力学方法模拟
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聚表剂
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可聚合季铵盐
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界面张力
