effect of hlb value on emulsion stability

Effects of Emulsifier and Continuous Phase on

Decreased stability of the resulting PPC emulsion was noted at PVA concentrations higher than 1 0 wt% Moreover we also found an increase in the production of solid content of PPC emulsion when the amount of emulsifier (HLB value 13 0) increased from 0 to 5 0 wt% in the presence of 1 0 wt% PVA

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Method for the preparation of an aqueous emulsion of

In the method a trialkoxysilane compound as the starting material is first emulsified in an aqueous medium containing a cationic surface active agent and a non-ionic surface active agent having a specified HLB value in the range from 16 to 20 in combination followed by the addition of an alkali catalyst and heating to effect hydrolysis and polycondensation of the trialkoxysilane

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A multifaceted peer reviewed ournal in the eld of Pharmacy

Effect of Using the Combination of Tween 80 and antibacterial ethanol eucalyptus oil micro-emulsion stability of the physical properties tween 80 Correspondence : Rahmah Elfiyani Pharmacy and Science systems (O / W) is a surfactant with HLB value of 9-20 Tween 80 was suitable because it has a HLB 15 6 Alcohol short to medium

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emulsions Flashcards

oils and oil like substances are also assigned hlb value that varies depending on if the emulsion is W/O vs O/W - for example mineral oil has hlb of 4 in w/o and 10 5 in o/w -- to prepare stable emulsion choose an emulsifying agent with similar HLB value as the oil

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Chapter 6 ppt

Chapter 6 emulsification and emulsification by surfactants 2006 4 19 1 Introduction 1 Emulsion immiscible liquid phase multiphase dispersion thermodynamics unstable system (from a few minutes to a few years) e g milk soybean milk bearnaise finishing oil etc 2 Formation (1) Emulsification one fluid dispersed in a second dispersephase inner phase discontinuous phase dispersion

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Surfactants – classification features and applications

Surfactants – classification features and applications Surfactants – classification features and applications N D Denkov and S Tcholakova Department of Chemical Engineering Faculty of Chemistry Sofia University Sofia Bulgaria Lecture at COST P21 Training School "Physics of droplets: Basic and advanced topics"

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Emulsion defoamer

Itscontent in the emulsion should be minimal According to the content of theemulsion and the HLB value of the silicone oil emulsifier generally 1 5% to10% To improve the stability of the emulsion was adjusted to the amount ofparticle size often two or three different emulsifiers of HLB value emulsifierHLB value paired with 3 to 9

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Stability of Water

Effect of emulsifier concentration and water content on the emulsion stability: The effect of Cocamide DEA concentration on the stability of Malaysian crude oil samples is presented in Fig 1 and 2 The purpose of using DEA as a stabilizer for the recovery in the refinery compared to

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Stability of oil emulsions

oils while one with an HLB number of about 5 is required to form an oil-in- water emulsion with cottonseed oil (Powrie and Tung 1976) A combination of two or more emulsifiers with different HLB values often is necessary to form a stable emulsion (Powrie and Tung 1976) Stability at a given HLB value varies with the emulsifiers used The HLB

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HLB、

7 Taking the chili oil resin as a raw material the pigment buoyancy factor as the appraisal target the effect of the HLB value the compound emulsifier type and the amount the stabilizer type and the amount on the hot pepper erythrophyll emulsion stability were studied respectively

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Lab Reports Pharmaceutical Technology: EMULSION

To determine the effect of HLB surfactant on the stability of emulsion To investigate the physical effect and stability on an emulsion formulation due to the usage of different types of emulsifying agents Introduction An emulsion is a mixture of two or more liquids that are normally immiscible

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A Titration Method for the Determination of the HLB's of

The HLB concept (hydrophile-lipophile balance of a nonionic emulsifier) was introduced by Griffin (1) It has since been refined and extended by Griffin Carter and their group (2 3) and summarized by Griffin (4) The practical value of the system to technical people in the cosmetic detergent and emulsion fields has been amply demonstrated

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Method for the preparation of an aqueous emulsion of

In the method a trialkoxysilane compound as the starting material is first emulsified in an aqueous medium containing a cationic surface active agent and a non-ionic surface active agent having a specified HLB value in the range from 16 to 20 in combination followed by the addition of an alkali catalyst and heating to effect hydrolysis and polycondensation of the trialkoxysilane

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Stability of a Cosmetic Multiple Emulsion Loaded with

2 3 Stability Studies Accelerated stability studies in the cosmetic area have been performed in periods of 30 to 90 days [] For stability studies samples were weighed (50 g) and packed in glass containers with 100 g of content capacity Samples were kept in incubation chambers each preset at different storage temperature for a period of 30 days and this testing was called "the

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Effect of Surfactant on Stability and Size Distribution of

Moreover to investigate the stability of the emulsion some stable emulsions were then demulsified with an EO/PO block copolymer of dodecan-1-ol Results signified adding demulsifier caused gas condensate droplets to grow (about 200% growths) which resulted in a good coalescence

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Determination of the optimum HLB value of lavender oil

A series of emulsions with varied HLB values were developed and the stability of the formulated coarse disperse systems was evaluated in terms of droplet size distribution degree of creaming effect of centrifugation and turbidimetry Keywords: lavender oil HLB value emulsion Introduction

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Silicone Products for Personal Care 'Unique Materials Plus'

Improve powder dispersibility and stability Reduce tackiness W/O emulsions stabilization of emulsion particles Create high internal-phase macro W/O emulsions Oil phase thickener Use as an oil phase thickener to improve stability of W/O O/W emulsions Silky non-greasy feel Soft-focus effect

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Lab Reports Pharmaceutical Technology: EMULSION

To determine the effect of HLB surfactant on the stability of emulsion To investigate the physical effect and stability on an emulsion formulation due to the usage of different types of emulsifying agents Introduction An emulsion is a mixture of two or more liquids that are normally immiscible

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An Introduction to Asphalt Emulsions

Emulsions readily accept additives such as polymers latex fillers anti-strips stabilizers and other modifiers to enhance the physical properties of both the emulsion and the cured asphalt An emulsion's charge can be positive negative or neutral to improve compatibility with available aggregates

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Emulsions

A - Inversion: An emulsion becomes inverted when the dispersed and continuous phases become switched An application of emulsion inversion is shipping of industrial chemicals for example in the paper making industry chemicals called retention aids (that help keep the small particles in paper from flaking out) are often manufactured and shipped as emulsions

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Using the Turbiscan Stability Index (TSI) to determine

Using the Turbiscan Stability Index (TSI) to determine surfactant efficiency on emulsions stabilisation In order to increase the stability of the emulsion surfactant Tween 80 must be added to this formulation than this 1% value is useless for the stability and

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Emulsion stability during gastrointestinal conditions

88 evaluate the effect of emulsifier hydrophobicity on emulsion stability and their influence upon 89 digestion The HLB value of PSE is determined by the free fatty acid chain length whereby 90 the HLB value increases with decreasing aliphatic chain length (Speranza et al 2013)

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