《Carbon》1985年第23卷总目次

第一期 3 层—链碳 V. M. Melnitchenko, Yu. N. Nikulin和A. M. Shdkov 9 873K下的空气氧化对炭—炭复合材料力学性质的影响 J. X. Zhao, R. C. Bradt和P. L. Walker, Jr. 15 玻璃炭的高温断裂韧性 J. H. Zhao, R. C. Bradt和P. L. Walker, Jr.     

关于不法网站假冒《硫酸工业》杂志官方投稿系统的告示

近日,我们核查发现,一些不法网站(如www.zgqkjl.com,www.xueshuzz.com,www.wenxuanzz.com,www.pkxueshu.com,www.360qikan.com,www.zhazhi.com,www.lunwentianxia.com,www.59165.com等)假冒《硫酸工业》杂志官方在线投稿平台或官方投稿邮箱名义,收取版面费和审稿费。经核查,国内存在很多此类不法网站。     

国际炭素研讨会——新工艺和新应用论文题目(续)

<正> 466 产甲烷细菌与炭材料之间的亲合力 A.Oya,H.Watanabe,S.Otani,Y.Sakakibara and M.Kuruda 470 炭/炭复合材料板的冲击试验 A.Ogawa,R.Hashimoto,Y.Sofue,K.Matusue,E.Yasuda,H.Mitsuma,T.Kobayashi,H.Tamura     

图表2-19 临界速度的合成

1/付20 .0的010 1峭 十1一码 1一研 一一l一踢凡300枷500600 8001 .0加氏O的10,000娜40.oo娜即,000功.0佣一O的.005一0.晰.瞬一。.咖.加1一O刀冈.咖.5一。.咖.咖.2一0 .0的.明.1刃.咖.咖.05。.咖.咖.能呱咖.咖刀10.咖.0阅.明衣网.网.咐一。O叻.咖.阅l衣咖.咖.咖.sD.咖,咖.助.护0.咖.咖.伽.1 轴受到两个以上不同类型的载荷时,设对应于一个载荷的临界速度为从,另一个为从,再一个为凡……,将所有这些作用于同一轴上时的临界速度N0按下式算得: 1、、,二1,_._。._._,,_由lvl查出.灭了,由‘、查出灭了等等,很据其和取倒数即可求得N0值。 [例…     

1986年国外电镀技术进展（下）

化学镀用于活化非导体的溶液配方,由Sirinyan等人,Giesecke等人获得专利权.(547)K. Sirinyan et al., U. S. Pat. 4 563 371(548)K. Sirinyan et al., U. S. Pat. 4 575 467(549)H. Giesecke, U. S. Pat. 4 568 570Finter和Fischer获得用于金属化学镀的感光组分的专利权.(550)J. Finter & W. Fischer, U. S. Pat. 4 560 643Sommer, Minten和Pismennaya,     

中华化学工业会会务消息

学术报告本会各专业组学术报告因时届夏令,暂停举行,以后何时继续,再行公告。新到图书本会化工图书馆新到图书择要公布於后:Халиф,А.Л.иКельцев,Н.В.:1955,147.Кичигин,М.А.иКостенко,Г.Н.:1955,392.Барг,Э.И.:1954,657.     

紫外光照射下颜料的表面改性

为提高有机颜料在水中的分散性(D.E.),研究了颜料P.R.254、P.R.255和P.V.19在紫外光照射下的表面改性。经紫外光照射后,颜料在水中的D.E.均得到明显提高,即使经过长时间静置(如24h),其D.E.仍比未处理的样品高。对于P.R.255,D.E.可提高74.0%;对于P.R.254,D.E.可提高67 4%;对于P.V.19,D E 可提高100.0%。在相同光强度下,对于P.R.255和P.V.19,照射时间越长,颜料的D.E.越好;对于P.R.254,照射时间延长,D.E.下降,但仍比未处理样品高。光强度对颜料D.E.的影响无规律性。还比较了处理后颜料的色光、透明度、墨色及流动性。     

第二十届国际炭会议扩展摘要题录

第1次会议 1A 炭纤维及复合材料炭纤维拉伸及压缩形变与基面之间剪切模量的关系 M. G. Northolt, L.H.Veldhuizen, H. Jansen 222 炭纤维结构-抗压性能之间的关系 D. J. Johnson, C.R.Park 224 注入离子的PAN系及沥青系炭纤维的结构和机械性能 Y.Matsuhisa, M. Washiyama, T. Hiramatsu, H. Fujino, G. Katagiri 226 沥青系纤维单向复合材料的抗压强度及断裂机理 B. J. Sullivan, A. A. Caiazzo B. W. Rosen 228 高性能纤维的抗压性能     

各类参考文献的著录格式

1.专著:标引顺序号著者.书名.版本.其他责任者.出版地:出版者,出版年.文件数量(选择项)2.专著中析出的文献:标引顺序号作者.题名.见(Ｉｎ):原文献责任者.书名.版本.出版地:出版者,出版年.在原文献中的位置3.论文集中析出的文献:标引顺序号作者.题名.见(Ｉｎ):编者.文集名.出版地:出版者,出版年.在原文献中的位置4.期刊中析出的文献:标引顺序号作者.题名.其他责任者.刊名,年,卷(期):在原文献中的位置5.报纸中析出的文献:标引顺序号作者.题名.报纸名,年-月-日(版次)6.专利文献:标引顺序号专利申请者,专利题名.专利国别,专利文献种类,专利号.出…     

1991年《江苏化工》作者索引

(以性氏汉语拼音为序,括号内数字为期数)B柏乃征.见张软红.柏云杉,韦海.永不褪色瓷像的制作.(4)鲍亚宁,尤解放.专业图书馆现代化与多功能服务.(2)C曹永林.催化光度法侧定试剂硝酸盐中的痕t N02一 (l)陈放.见朱炳林.陈敏.见陈金龙.陈嘉瑛.见李荷庆.陈金龙,王钒,陈敏,吴卫忠,袁卫邦.大孔阳离子交换树 脂催化合成丙氮酸乙命酸盐.(l)陈鸣斐.见姜志红.陈其昌.三相催化法合成3,4,s三甲权基苯甲醛.(4)陈士欣:见王福祥.陈恕华.见贺敏强.陈秀云.新型防腐蚀水下固化环权树脂徐料.(l)陈筱京,王国华,吴静.碑酸三辛酷的研制.(4)程瑞珍,王振东,许伟.利用…     

多孔介质中流动泡沫的压力分布计算

将多孔介质简化为一簇变截面毛细管组成的毛细管束,根据多孔介质的颗粒直径、颗粒排列方式、孔喉尺度比以及束缚水饱和度,计算出变截面毛细管的喉道半径和孔隙半径。在考虑多孔介质喉道和孔隙中单个气泡的受力和变形基础上,利用质量守恒定理和动量守恒定理,推导出单个孔隙单元内液相的压力分布和孔隙单元两端的压力差计算公式,最终得到多孔介质的压力分布以及多孔介质中泡沫当量直径计算方法。利用长U型填砂管对多孔介质中稳定泡沫的流动特性进行了实验研究,并对实验结果和计算结果进行了对比。结果表明:稳定泡沫流动时多孔介质中的压力分布呈线性下降,孔喉结构和泡沫干度是影响泡沫封堵能力的主要因素;泡沫的封堵能力随泡沫干度的增加而先增加后降低,在泡沫干度为85%时达到最强封堵能力。     

Evaluation of the capillary pressure curve techniques for determining pore size distribution — a network approach

Porous media are inter-connected networks of void spaces having different shapes and sizes. Attempts at developing analytical expressions describing fluid flow through them them have not been satisfactory to date for the lack of a satisfactory characterization of the structure of void spaces. The classical model, of bundle of tubes, is too simplified a model to be realistic and useful in most real situations. In the present work the flow behaviour in porous media was modelled by a network of inter-connected tubes of different sizes. An attempt was made to evaluate and synthesize various techniques of relating pore-size distribution to the capillary pressure behaviour of a medium. The validity of the “ink-bottle” effect and the techniques of Fatt and Meyer were tested by comparing the pore-size distributions obtained from capillary pressure data with the actual tube-size distribution of the network. It was seen that the existing techniques of obtaining pore-size distribution yield poor results even in the case of highly idealized network representations of porous media. Some modifications for making these techniques more realistic are discussed.The extent of inter-connections between the pores in a network was found to be a very important factor in influencing the shape of the capillary pressure (P_c) curves. This effect has been tested by allowing 2, 6, 10 and 14 inter-connections (on the average) between pores in the network, thus simulating parallel and intersecting tube models.In order to improve the reliability of results, it must be ascertained that there is, indeed, a one-to-one correspondence between pore-size distributions and capillary pressure curves.     

气液分离强化传热多孔结构毛细上升特征

气液分离强化传热多孔结构,由于气体、液体在多孔壁面有着不同的力学行为,使得气液两相在多孔壁面发生分离,气体不能进入多孔壁面结构,液体则能自由进入,从而形成气体始终沿管壁运动,液体则在管中心流动这一高效传热流态。多孔壁面的毛细力对气液分离有着重要的影响。采用一种新颖的毛细力测试方法--红外热像测试法测试了多孔强化结构的毛细力。研究发现,多孔结构的毛细力与使用的粉末材料形状、颗粒尺寸及填充孔隙率有关。其中对毛细力影响最大的是粉末颗粒形状,颗粒尺寸次之,孔隙率最弱。     

THE FLOW OF MICROEMULSIONS THROUGH PACKED BEDS AND CAPILLARY TUBES

The flow behavior of water-in-oil microemulsions through beds packed with glass spheres was studied experimentally. The microemulsions used in this study exhibited a shear thinning viscosity described by a simple power law model. The flow of the microemulsions was accompanied by significant apparent slip effects, quantified by an effective slip velocity. The effective slip velocity increased with increasing surfactant concentration, but it differed in magnitude for the packed bed and the capillary tube flows.

In the absence of apparent slip effects, the capillary-power law (CPL) model predicted the superficial velocities in the packed beds with an average error of less than 6%. This provides a direct verification of the applicability of the capillary-power law model to inelastic shear thinning fluids in the absence of “anomalous” wall effects.     

Wall slip of concentrated suspension melts in capillary flows

The effects of wall slip of concentrated suspension melts in capillary flows were investigated at elevated temperature. The modeled material is a mixture of polymer EVA (Ethylene Vinyl Acetate) and non-colloidal spherical powder (glass microspheres) with mean particle size within 53∼63 μm. The effect of particle concentration on wall slip was studied experimentally in a capillary rheometer. For suspensions with different particle loadings (35%, 40%, and 45% by volume), the slip velocity V_s increased with an increase of particle concentration at the same testing temperature. A master slip curve can be obtained by plotting slip velocity versus the product of wall shear stress and square root of particle concentration. As such, a new particle concentration-dependent slip model is proposed. A theoretical approach coupled with the new slip model and flow equation is employed to characterize the flow behavior of concentrated suspension in a capillary rheometer, with reasonable agreement obtained with experimental observations.     

Proposed Model to Match the Experimental Results for Oil Displaced by Externally Generated Foam

A mathematical model was developed to predict the performance of the oil displaced by water foam in porous media. In this model, the diffusivity equations of both water foam (the displacing phase) and oil (the displaced phase) were combined in a single equation, which was solved numerically by a finite difference method, using the implicit-explicit method. The proposed model was compared with Poiseueille's model which represents the porous media by straight capillary tubes. It was found that the proposed model is superior to that of Poiseueille, because the Poiseueille model does not take into account the variations in foam properties along the sand pack. The production data used for the proposed model were obtained experimentally from the displacement of oil by water foam of different qualities (externally generated foam). The plastic viscosity of the water foam was measured experimentally for four foam quality ranges using capillary tubes of different sizes. The effective viscosity of the water foam determined from the plastic viscosity was used in the proposed model. Foam viscosity was found to increase as the quality increases, and the water foam obeys a Bingham plastic fluid model. The porous medium was represented by a sand pack whose length was 36 cm and diameter was 6.3 cm. Its absolute permeability was 341 md and porosity was 22.8%. The foam consisted of tap water, surfactant, and nitrogen gas.     

THE EFFECTS OF MEDIUM THICKNESS ON THE ISLAND SIZE DISTRIBUTION IN IMMISCIBLE DISPLACEMENT FLOW IN POROUS MEDIA

The invasion percolation algorithm is used to simulate two-fluid immiscible displacement of a wetting fluid by a non-wetting fluid in various porous media represented by two-dimensional and three-dimensional networks of interconnected capillaries. Trapping of the displaced fluid occurs, thereby creating isolated islands. The effects of the thickness of the porous medium on the island size distribution are studied for capillary displacements for the case in which buoyancy effects are negligible. It was found in a previous study that the number of islands of size s scales approximately as s~" in two-dimensional porous media, where a is a function of the fluid viscosity ratio. The present work reveals that there is a cross-over behavior between the two-dimensional and the three-dimensional problems.     

Determination of pressure drop for concentrated suspension in a capillary flow

The rheological behavior of concentrated suspension melts in a capillary die is investigated. Particle migration and wall slip are two major factors affecting the flow behavior. A numerical model is proposed to describe the coupling effect of particle migration and wall slip in a capillary tube flow, incorporating a power‐law model for binder viscosity and a concentrated suspension viscosity model proposed by Krieger. Wall slip of a non‐Newtonian concentrated suspension is characterized by a modified Mooney method for which the conventional Mooney method is not applicable. We characterized the flow behavior of a concentrated suspension of a non‐Newtonian binder, EVA 460 (ethylene vinyl acetate), mixed with spherical glass beads of 40% by volume. Predicted results were compared with experimental observations, with good agreement. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers     

EVAPORATION FROM POROUS MEDIA: A CAPILLARY MODEL OF A PENETRATING FRONT

A capillary tube model was solved to investigate the influence of mass transfer coefficient, temperature, and front depth on the evaporation rate during the penetrating-front period of water-filled porous media dried in hot air. The results show that increasing the flow rate of the drying air is not so efficient as increasing the sample temperature. Due to attenuating diffusion rate, the rate of liquid front migration decreases with time. The calculations explain the falling rate period behavior of sandstone heated at 121°C. Trends depicted by the model may be useful for the design of heating conditions for drying processes.     

“Relay-mode” promoting permeation of water-based fire extinguishing agent in granular materials porous media stacks

Water-based fire extinguishing agent is the main means to deal with smoldering fires. However, due to the hydrophobic properties of the particle surface, the porous medium channel provide resistance and slow down the extinguishing agent flow during the downward permeation process. To promote the liquid permeation process in such porous media, this work studied liquid imbibition process and analyzed the oscillating and attenuating process of liquid level in capillary channel by theoretical, exper...