检索结果-南通市图书馆

Characterization and Utilization of Eziulo Clay as an Extender in emulsion Paint Formulations

Journal of Minerals and Materials Characterization and Engineering 2017年第4期5卷 174-184页

作者： Isaac O. Igwe Gift Osuoha Chinedu Nwapa Department of Polymer and Textile Engineering Federal University of Technology Owerri Nigeria

A series of emulsion paint samples were prepared using Eziulo clay as an extender, commercial whiting, and titanium dioxide (TiO2). The clay that was calcined at 850oC and sieved to three particle sizes (0.075, 0.100 and 0.150 mm) was incorporated into emulsion paints at varying amounts ranging from 5% - 32% of the total extender and pigment in the paints. Poly (vinyl acetate) was used as the binder while distilled water served as the solvent. The Eziulo clay which consisted mostly of silica (63.30%), alumina (19.40%), and iron (III) oxide (2.10%) had the following properties: pH (6.67), specific gravity (2.47) and oil absorption (34.30 g/100 g clay). The colour and solubility of the clay in dilute hydrochloric acid, acetic acid, sodium chloride solution, methanol and distilled water were generally unaffected either in the cold or when heated expect for the slight solubility observed in methanol. The clay formulated paint samples exhibited higher viscosity (7.0 - 7.80 poise) than the paint sample without Eziulo clay (6.60 poise). Conversely, the pH and specific gravity of the paint sample without Eziulo clay were higher than those of paint sample containing the clay. The surface and hard dry times of the formulated paint samples were greater than that of the paint sample without Eziulo clay. The determined surface dry times were within the range, 16 - 18 min, irrespective of clay content and particle size. The hard dry times of the formulated paint samples were found to reverse with increases in clay content. The paint dry film flexibility was unaffected by the incorporation of clay, irrespective of the amount and clay particle size. The emulsion paint dry films exhibited decreases in film adhesion to substrates with increases in clay content, and increases in film adhesion with increases in clay particle size. The paint dry films did not exhibit any chalking tendency, were resistant to fungal attack, and passed the water drop test. The present study has demonstrated the utility of Eziulo clay in emulsion paint f

关键词： Extender emulsion Paint Eziulo Clay Drying Properties Titanium Dioxide Clay Particle Size Characterization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Influence of the Microstructure of W/O emulsion of Waxy Crude Oil on Its Rheology

引用

Advances in Chemical Engineering and Science 2019年第4期9卷 299-316页

作者： Lixin Wei Hangming Bi Jian Zhao Hang Dong Dawei Wang Xian Zhang Northeast Petroleum University Daqing China

In this article, the viscosity-temperature characteristics of W/O waxy crude oil emulsion under different microstructures were studied, and the characteristics of the microstructure were described by the analysis of the dispersed phase parameters including the average particle size, the degree of dispersion, and the nonuniformity of average particle size. On this basis, we discuss the effects of temperature, shear rate and the microstructure on the apparent viscosity of Daqing crude oil emulsion. The results showed that with the increasing of stirring speed, the number of droplets and the degree of dispersion phase dispersion increased, average droplet size and nonuniformity of average particle size reduced;the average particle size of the dispersed phase decreased by 0.5 μm, and the abnormal point increased by about 1°C. For emulsions with the same microstructure, as the temperature or shear rate rising, the rate and percentage of the reduction in apparent viscosity decreased. At the same temperature or shear rate, the reduction rate in apparent viscosity increases with the average particle size of dispersed phase decreases, in contrast to the percentage of reduction in apparent viscosity, which revealed a definitive correlation between average particle size of dispersed phase and the apparent viscosity in the non-Newtonian fluid that from 34°;C to 48°;C;the absolute value of Pearson’s correlation coefficient was above 0.8, which was highly negatively correlated;as the temperature rose, the absolute value of Pearson’s correlation coefficient decreased from 0.839 to 0.216.

关键词： Microstructure Crude Oil emulsion Rheological Test Apparent Viscosity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Skin Anti-Aging Benefits of a 2% Resveratrol emulsion

引用

Journal of Cosmetics, Dermatological Sciences and Applications 2021年第2期11卷 155-168页

作者： Anke Schulte to Brinke Ciska Janssens-Böcker Martina Kerscher Department of Clinical Affairs MedSkin Solutions Dr. Suwelack AG Billerbeck Germany Dermatology at the Division of Cosmetic Science Department of Chemistry University of Hamburg Hamburg Germany

Background: Young and intact skin is highly responsive. As skin ages, its responsiveness decreases. Production of structural components of the skin slows down and signs of skin aging appear. External influences like UV radiation and pollution contribute to signs of skin aging. They lead to an increased formation of so-called free radicals. Bioactive antioxidant compounds, such as polyphenols, have beneficial effects on skin health by free radical scavenging. The purpose of this study was to evaluate the topical effects of new and highly concentrated resveratrol containing emulsion (Medskin Solutions Dr. Suwelack AG, 2% trans-resveratrol) on age-related alterations to the skin. Methods: A clinical observation study was performed on 20 subjects to observe the effects of a 2% resveratrol emulsion on typical signs of skin aging. Product was applied once daily for a period of 8 weeks in combination with a standardized treatment. Tested parameters were skin elasticity, skin barrier function, skin smoothness, skin thickness and density. Results: After 8 weeks of treatment, skin pH value is significantly lowered and skin barrier function improved. The value of skin elasticity (+5.3%), and skin density (+ 10.7%) had increased, while skin roughness (-6.4%) and skin dispensability (-45.9%) had diminished. Intensity of skin redness had decreased. Furthermore, expert and participant evaluations show satisfaction, especially with regard to skin smoothness and skin moisture. Conclusion: The resveratrol emulsion shows positive outcomes by supporting reduction of skin wrinkling and increasing skin firmness, as well as reducing skin redness, and is therefore an all-round anti-aging treatment.

关键词： Resveratrol emulsion Skin Care Skin Aging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Investigation of the Electro-Mechanical Behavior of Hybrid Polyaniline/Graphene Nanocomposites Fabricated by Dynamic Interfacial Inverse emulsion Polymerization

引用

Graphene 2015年第1期4卷 7-19页

作者： Rami Regueira Ran Yosef Suckeveriene Irena Brook Guy Mechrez Roza Tchoudakov Moshe Narkis Interdepartmental Program in Polymer Engineering Technion-IIT Haifa Israel Department of Chemical Engineering Technion-IIT Haifa Israel Department of Water Industries Engineering Kinneret College in the Jordan Valley Zemach Israel

This paper describes a study on electrical resistivity under loading of polyaniline (PANI)/graphene nanocomposite powders and compacts. The composites were prepared by an in-situ interfacial dynamic inverse emulsion polymerization technique under sonication of aniline in the presence of graphene sheets in chloroform. During polymerization the graphene nanoplatelets are coated with PANI and are well dispersed both in the polymeric suspension and then in the dried polymer matrix as evidenced by cryogenic transmission electron microscopy (Cryo-TEM) and high resolution scanning microscopy (HRSEM). The presence of graphene nanoplatelets lowers the electrical resistivity of the polyaniline by two orders of magnitude for both the powder and the compact composites as demonstrated by their electrical resistance measurements conducted under loading. The lowest measured electrical resistivity values were 5 Ω·cm for 33% wt. graphene powder and 8 Ω·cm for 41% wt. graphene compacted composites. Cyclic electrical measurements under loading showed a distinct reproducible dependence of the bulk resistivity vs. applied pressure. This repetition is a key component for electro-mechanical sensors. To the authors’ best knowledge, this is the first report on polymerization of aniline in presence of graphene by the in-situ interfacial dynamic inverse emulsion polymerization technique and also the first report on cyclic electrical measurements under pressure of PANI/graphene nanocomposites.

关键词： Nanocomposites Polyaniline Graphene Electro-Mechanical Sensors Inverse emulsion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effect of Emulsifier Concentration on the Oxidation of an O/W emulsion Prepared from Canola Oil

引用

Food and Nutrition Sciences 2018年第6期9卷 683-692页

作者： Yukihiro Yamamoto Rino Misawa Faculty of Life and Environmental Sciences Prefectural University of Hiroshima Shobara Japan

Oils and fats exist in many foods as emulsions, and preventing the oxidation of emulsion is vital importance for the food industry. In this study, the effect of different concentrations of Tween 20 (0.5, 2.5, 5.0, 10 w% vs. oil) on the oxidation of canola oil O/W emulsion was investigated. Oxidation was conducted at 34°C in the dark and accelerated using 2,2-azobis (2,4-dimethylvaleronitrile) (AMVN) and 2,2’-azobis (2-methylpropionamidine) dihydrochloride (AAPH) as radical generators. Peroxide value (PV, mEq/kg) was monitored as generation of the primary oxidation compound. PV was suppressed by Tween 20 in a dose-dependent manner in both emulsion system using AMVN and AAPH, and the tendency of suppression was clearer in the system using AMVN than in that using AAPH. Contrarily, there were no significant differences in PV when emulsions were prepared with tocopherol-stripped oil. The particle size of emulsion droplets were also consistent among emulsions prepared. However, tocopherol contents at lipid phase of the emulsions prior to oxidation decreased with concentration of Tween 20. These results suggest that excess Tween 20 could cause tocopherol to migrate from the lipid phase of the emulsions to lipid-oil interface, suppressing the oxidation of emulsions.

关键词： O/W emulsion Oxidation Tween 20

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Extraction of Palladium from Acidic Chloride Media into emulsion Liquid Membranes using LIX 984N-C<sup>®</sup>

引用

International Journal of Nonferrous Metallurgy 2012年第2期1卷 13-22页

作者： Satit Praipruke Korbratna Kriausakul Supawan Tantayanon Green Chemistry Research Laboratory Department of Chemistry Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok Thailand National Center of Excellence for Petroleum Petrochemicals and Advanced Materials (NCE-PPAM) Bangkok Thailand Thailand Program of Petrochemistry Faculty of Science Chulalongkorn University Phayathai Road Pathumwan Bangkok Thailand

The extraction of palladium from hydrochloric acid solutions into emulsion liquid membranes (ELMs) using LIX 984N-C as the extractant was investigated. The influential factors and the total capacities of palladium extraction were determined by a batch method. The behavior of palladium extraction by ELMs under the operational conditions-pH of the external feed phase, surfactant and extractant concentration, internal stripping phase concentration, treat ratio and agitation speed were reported. Using LIX 984N-C, palladium was effectively extracted from the external acidic chloride feed phase into the internal receiving phase of W/O emulsions. More than 92% of palladium could be extracted at a feed pH of 2 with 3% Span 80, 9% LIX 984N-C and 7M HCl at a stirring speed of 300 rpm.

关键词： Palladium Extraction LIX 984N-C emulsion Liquid Membrane

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on the Formation and Properties of Liquid Crystal emulsion in Cosmetic

引用

Journal of Cosmetics, Dermatological Sciences and Applications 2013年第2期3卷 139-144页

作者： Wanping Zhang Lingyan Liu School of Perfume and Aroma technology Shanghai Institute of Technology Shanghai China

In this paper, the formation of liquid crystal structure in preparation of emulsion and the change of those liquid crystal structures during storage and usage were studied. Besides, the rheological and moisturizing property of the liquid crystal structure emulsion was investigated as well. The results show that the liquid crystal structure at oil-water interface in the emulsion forms gradually with cooling process after homogenization. The liquid crystal structure doesn’t change significantly during the storage within 12 months. And after emulsion being stored for 18 months, the crystal structure starts to decompose. Upon application on the skin, the liquid crystal structure of emulsion was found to transform into other form with rubbing, although the liquid crystal structure still remains. The rheological data shows that liquid crystal emulsion exhibits solid-like (elastic) property during storage, which is favorable for good stability. On the other hand, liquid crystal emulsion shows typical shear-thinning property upon usage, which leads to an excellent skin sensory feeling. And the improved moisturizing properties of such emulsion may be attributed to the liquid crystal structure.

关键词： Liquid Crystal emulsion Rheology Stability Moisture

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design and Engineering Application of Direct Mixing Lubrication System for emulsion Pipeline in Secondary Cold Rolling Mill

引用

Mechanical Engineering Science 2020年第1期2卷 36-47页

作者： Hangzhe DONG Yazhen ZHANG Wantong HU Zhen-hua BAI Yan-yan ZHANG National Engineering Research Center for Equipment and Technology of Cold Strip Rolling Yanshan UniversityYanshan UniversityQinhuangdaoChina State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdaoChina

With the benefit fierce competition in the steel industry market in recent years,double cold reduction products have been developed towards strength improvement and thickness reduction.The traditional cold-rolling lubrication process with a fixed flow rate and concentration cannot solve the problems,which are uncontrollable plate shape and the excessive consumption of lubricating oil.Moreover,based on the analysis of the traditional direct aplication lubrication system of double cold reduction mill,a set of design scheme suitable for the emulsion pipeline direct mixing lubrication system of double cold reduction mill unit was proposed.The design completed the selection of key components,which included the static mixer and atomization nozzle selection,pump and oil pump design selection,pipeline design selection,flow type selection,pressure gauge selection,electronic control cabinet design selection and other eight aspects.Equipment of the emulsion pipeline direct mixing lubrication system of double cold reduction has been developed.Comparing with characteristics of the traditional direct aplication lubrication system,the emulsion pipeline direct mixing lubrication system was better applied to the production practice of a 1220 double cold reduction mill.The consumption of ton of steel was reduced by 9.6%.The rolling energy consumption and fuel consumption comprehensive costs decreased by 10.7%,and the strip steel section thickness difference was reduced by 19.3%.In addition,the plate shape quality defect rate decreased by 25.6%,otherwise creating a large economic benefit for the unit and promoting the application value.

关键词： double cold reduction emulsion direct mixing lubrication system static mixer plate thickness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Preparation and Application of the Hydrophilic Amino-Silicone Softener by emulsion Polymerization

引用

Advances in Chemical Engineering and Science 2020年第1期10卷 1-23页

作者： Ruza Artikboeva Yue Wu Mingxing Yang Chen Jie Quan Heng Chemistry Department Wuhan Textile University Wuhan China

The amino poly-siloxane was modified with self-made polyether silicones by the crafts of emulsion polymerization. We studied the emulsifier, the dosage of emulsifier initiator, polyether/silane coupling agent, pH value. There are some results of the research indicated in the following. First, there are many factors for the hydrophilic amino-silicone softener both on the polymerization process and the performance, such as the proportion and amount of emulsifier, initiator dosage, the mass ratio of the polyether and hydrogen silicone oil, the choice of silicone coupling agent, and the ratio and dosage of polyether silicones silane coupling agent. Second, the amount of hydrogen of the hydrogen silicones and the choice of catalyst are the key points on the synthesis of polyether silicones. The amount of hydrogen should be low and the catalyst must be economical and efficient and its introduction should be small and times, other more the holding time is not too long. The next one is that, in the process of hydrolysis of silane coupling agent, we need some acid to adjust pH value, or they will be broken down. The most important one but not the last is that the epoxy group can improve the products low-temperature supple and the persistence of the finishing fabric, furthermore it can reduce yellowing and has a good stability of the inorganic salt, however, it will be destroyed if the reaction temperature for epoxy is too high. What’s more, it is very economical and environmental that the process of emulsion is simple and with less emulsifier.

关键词： Amino-Silicone Softener Polyether Emulsifier Hydrophilic Softness and Smoothness emulsion Polymerization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Experimental Study on Latent Heat Storage Characteristics of W/O emulsion by Ultrasonic Wave Impression

引用

Open Journal of Fluid Dynamics 2013年第2期3卷 48-54页

作者： Shin-ichi Morita Yasutaka Hayamizu Akihiko Horibe Naoto Haruki Hideo Inaba Issei Higashi Department of Mechanical Engineering Yonago National College of Technology Yonago Japan Edit Inc. Fukuoka Japan Graduate School of Natural Science and Technology Okayama University Okayama Japan Shujitsu University Okayama Japan

The flowable latent heat storage material like Oil/Water type emulsion, microencapsulated latent heat material-water mixture or ice slurry, etc., is enabled to transport the latent heat in a pipe. Supercooling phenomenon of the dispersed latent heat storage material in continuous phase is obstructed by a latent heat storage. The latent heat storage rates of dispersed waterdrops in W/O (Water/Oil) emulsion are investigated experimentally in this study. The waterdrops in emulsion have the diameter within 3 - 25 μm, the averaged diameter of waterdrops is 7.3 μm and the standard deviation is 2.9 μm. Supercooling release of waterdrops in emulsion is examined by short time impressing of the ultrasonic. The direct contact heat exchange method is chosen as the phase change rate evaluation of waterdrops in W/O emulsion. The supercooled temperature is set as parameters of this study. The previous obtained experimental result, as the condition without impressing ultrasonic wave, showed that the 35 K or more degree from melting point brings 100% latent heat storage rate of W/O emulsion. It is clarified that it is possible to reduce 20 K of supercooling degree by impressing the ultrasonic.

关键词： Heat Storage Latent Heat W/O emulsion Direct Contact Heat Exchange Ultrasonic

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：