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Influence and Dispersion of Nanofiber of Wood Modified on Properties of Cement Based Mortars

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Journal of Renewable Materials 2019年第7期7卷 631-641页

作者： Fadhel Aloulou Alila Sabrine Habib Sammouda LabEM-LR11ES34:Laboratory of Energy and Materials University of SousseTunisia LMSE:Laboratoire Sciences des Matériaux et Environnement University of SfaxTunisia

Wood nanofibers from industrial waste have been used as polymeric material to reinforce the cement paste to a content of up to 2%by weight of cement.The effect of the wood nanofibre content on the porosity,the compressive strength and the degree of hydration of the cement was studied.The results showed an improvement in compressive strength of over 50%with 1%of added fiberwood.Chemical modification of nanofiber wood by grafting alkyl chains to their surface can reduce the amount of water absorbed by the sample.Addition of an anionic additive(SDBS)to the mixing water improves the surface of the samples more and more by minimizing the pore size by emulsion effect,hence the water absorption decreases.The degree of hydration of the cement increased with the cellulose content containing nanofibrils.The analysis revealed that the presence of nanofibers favored the hydration of the cement by producing more calcium silicate gel and portlandite,probably the main reason for this improvement in compressive strength.

关键词： Cement nano-fiber wood modified adjuvant,surfactant emulsion

Importance of emulsions in crystallization --applications for fat crystallization

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Frontiers of Chemical Science and Engineering 2013年第1期7卷 43-48页

作者： Sandra PETERSEN K. CHALEEPA Joachim ULRICH Center for Engineering Science Thermal Process Engineering Martin Luther University Halle-Wittenberg D-06099 Halle (Saale) Germany

emulsions and crystallization are two independent research topics which normally do not overlap although a combination of the two could be applicable to many areas. Here, the importance of emulsions in the field of fat crystallization is described. Three applications with industrial relevance were chosen for investigation： fat fractionation, the solidification of phase change materials and solid lipid nanoparticles. For fat fractionation and phase change materials, emulsification can be applied as a tool to improve the fat crystallization process, and thus the product quality of the crystallized fat. Furthermore, the use of emulsification creates new solid lipid nanoparticles in the application fields such as area of fat crystallization.

关键词： emulsion fat crystallization phase change material emulsion ffactionation emulsion solidification

Effects of the chemical structure of surfactants on the stability of naphthenic oil-based metalworking fluids

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Chinese Chemical Letters 2020年第2期31卷 345-348页

作者： Yuan Xue Jinbao Liu Maiying Xie Fengfei Chen Mingan Zhou Hualin Lin Fan Zhang Shizhou Liu Zhiqiao Wu Sheng Han School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China Department of Science and Technology Shanghai Urban Construction Vocational CollegeShanghai 201415China College of Chemistry and Chemical Engineering Shanxi Datong UniversityDatong 037009China

In this study,various nonionic surfactants(NS) with different ethylene oxide(EO) numbers and tail lengths and its binary blends with anionic surfactants(AS) were used as emulsifiers for naphthenic oil to form the microemulsion metalworking fluids(MWFs),and the effects of them on the stability of the emulsion system were investigated by formulation triangle method.The results indicated that binary complex surfactants of NS and AS as emulsifiers exhibited better emulsifying effect than that of single NS.NS with different EO numbers and tail lengths presented various emulsifying effects.NS(EO=10)exhibited the greatest number of stable formulations,especially the TX-10,but no linear relationship existed between the number of stable formulations and the tail length of NS.In addition,aromatic primary alcohol ethoxy late(APAE) series surfactants containing benzene groups similar to the cycloalkanes in the naphthenic oil so that presented the best emulsifying affect and the greatest number of stable formulations.The co-surfactant of sodium dodecyl benzene sulfonate(SDBS) binary blends with NS exerted the best synergistic effect,and the stable formulations numbers were ranged from 5 to 7,next sodium stearate(SS) comes last followed by sodium dodecyl sulfate(SDS-1) and sodium dodecyl sulfonate(SDS-2).

关键词： Metal working fluid emulsion stability Emulsifying effects Stable formulations Naphthenic oil

Upstream Operations in the Oil Industry： Rigorous Modeling ofan Electrostatic Coalescer

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Engineering 2017年第2期3卷 220-231页

作者： Francesco Rossi Simone Colombo Sauro Pierucci Eliseo Ranzi Flavio Manenti Department of Chemistry Materials and Chemical Engineering "Giulio Natta" Polytechnic University of Milan Milan 20133 Italy Davidson School of Chemical Engineering Purdue University West Lafayette IN 47907-2100 USA

This paper deals with a first-principle mathematical model that describes the electrostatic coalescer unitsdevoted to the separation of water from oil in water-in-oil emulsions, which are typical of the upstreamoperations in oil fields. The main phenomena governing the behavior of the electrostatic coalescer are denscribed, starting from fundamental laws. In addition, the gradual coalescence of the emulsion droplets isconsidered in the mathematical modeling in a dynamic fashion, as the phenomenon is identified as a keystep in the overall yield of the unit operation. The resulting differential system with boundary conditionsis then integrated via performing numerical libraries, and the simulation results confirm the available lit-erature and the industrial data. A sensitivity analysis is provided with respect to the main parameters. Themathematical model results in a flexible tool that is useful for the purposes of design, unit behavior predic-tion. performance rnoniroring, and ontimization.

关键词： Upstream operations Electrostatic coalescer Desalter Rigorous modeling Water-oil emulsion

A review on the rheology of heavy crude oil for pipeline transportation

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Petroleum Research 2021年第2期6卷 116-136页

作者： Farid Souas Abdelhamid Safri Abdelbaki Benmounah LEGHYD Laboratory Faculty of Civil EngineeringUniversity of Science and Technology Houari Boumediene(USTHB)Bab EzzouarAlgerAlgeria Research Unit Materials Processes and Environment(UR-MPE)Faculty of Engineering ScienceUniversity M’Hamed BougaraBoumerdesAlgeria

Given the combination of rising global energy demand and the decline in conventional crudes, heavycrudes are generally considered to be the future energy resource. In many regions of the world, heavycrude oil must be transported through pipelines from the point of production to storage facilities orrefineries. The transportation of heavy crude oil by pipeline poses serious problems related to the highviscosity and flow difficulties, particularly in cold climates or offshore conditions. Indeed, the viscosity ofcrude oil is an important physical property that influences and controls crude oil flow in pipelines.Viscosity introduces resistance to movement by causing a shear or frictional force between the fluidparticles and the boundary walls. This high viscosity means that the pumping power requirements forcrude oil in a long-distance pipeline are very high in order to overcome the increasing shear and frictionforces. Therefore, in order to facilitate the pumping of these viscous oils and reduce operating expensesand the negative impact of pressure drops in pipelines during flow and processing, their viscosity mustbe reduced. Various techniques are used to increase pumping efficiency and improve the flow of crude oilthrough the pipeline, which may present logistical, technical or economic disadvantages for a givenapplication. The main ones are the addition of surfactants or polymers, dilution with lighter crudes, useof water as annular fluid, thermal remediation and emulsification with surfactant (O/W). This reviewhighlights the methods currently used to enhance the fluidity of heavy crude oil in pipelines behindrheology improvement, in particular the addition of additives and the use of water and surfactants tocreate a stable emulsion of heavy crude oil in water have been considered.

关键词： Additives emulsion Heavy crude oil Rheology Viscosity

Synthesis and Structure Control of A New Kind of Inelastomer Impact Modifier with Core-shell Structure and Impact Modification to PVC/CPE

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Chemical Research in Chinese Universities 2000年第2期16卷 152-155页

作者： TANG Jun LI Wenjiang PAN Rong YANG Bai 吉林大学吉林长春 1 30 0 2 3

A new kind of inelastomer impact modifier with a coreshell structure was synthesized by employing a multistep composite emulsion polymerization technique, the size and morphology structure of the coreshell particles could be controlled by the multistep composite emulsion polymerization technique. The study of the impact strength and the elongation at break of the PVC/CPE blend with different contents of coreshell particles(CS) indicated that the mechanical properties of PVC/CPE/CS composite were the best when the concentration of the particle was 25%(mass fraction) which showed the different regularities and characteristics of elastomer toughening plastic.

关键词： Inelastomer impact modifier Core-shell particle emulsion

Ananas comosus loaded nanoemulsion a promising therapeutic approach for cancer

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Cancer Advances 2022年第20期5卷 1-11页

作者： Virender Kumar Vandana Garg Harish Dureja Department of Pharmaceutical Sciences Maharshi Dayanand UniversityHaryana 124001India

Cancer has a major impact on society across the world.There are different strategiessuch as chemotherapy,radiotherapy,surgical intervention,and immunotherapy for treatingcarcinoma.Now-a-days,phytochemicals are gaining a lot of interest for their chemopreventiveaction in treatment of carcinoma.Recent investigations demonstrated that extract/bioactivecompounds from A.comosus resulting in reduction of inflammatory cytokines release andproliferation of T-cell was also inhibited.Therefore in treatment of cancer nanoemulsion of A.comosus have ben proposed.On the basis of previous literature,we have postulated thatnanoemulsion of A.comosus may be beneficial because of its safety and efficacy profile.

关键词： inhibited cancer emulsion

DEVELOPMENT AND APPLICATION OF WATER-IN-OIL emulsionS FOR ZINC HOT ROLLING

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中国有色金属学会会刊：英文版 1995年第1期5卷 107-110页

作者： Jiang Jianchun Mao Daheng(Department of Machine Engineering,Central South University of Technology, Changsha 410083)

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关键词： emulsion oil-in-water water-in-oil zinc hot rolling lubricant agueous lubricant

Thermal Scratch on Surface of SUS430 Stainless Steel Strip in Cold Rolling Process

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Journal of Iron and Steel Research(International) 2014年第3期21卷 282-286页

作者： Chang-sheng LI Jin-shan CHEN Wen-long HAN You-yuan LI Bo FU State Key Laboratory of Rolling and Automation Northeastern University Baosteel Stainless Steel Co. Ltd.

The thermal scratch significantly influences the surface quality of the stainless steel in cold strip rolling. The thermal scratch has a close relation to the rolling parameters, the rolls surface and the emulsions used in rolling. In order to explain the thermal scratch on the strip surface, the cold roiling process of SUS430 stainless steel strip was investigated in the laboratory. The thermal scratch defect occurs frequently in the second rolling pass （maximum reduction in height is 32.3 ~）, especially on the lower surface of strips. When concentration and temperature of the emulsion are the same, the thermal scratch on the surface o{ the strip is aggravated with increasing the roll surface roughness. With the same roll surface roughness and emulsion concentration, the thermal scratch is obviously more severe at an emulsion temperature of 63 ℃ than 55 ℃. With the same roll surface roughness and emulsion tempera- ture, the thermal scratch is distinctly weaker at the emulsion concentration of 6 % than that of 3 %.

关键词： stainless steel thermal scratch emulsion roll surface roughness