Emulsions and the HLB System

11 2 HLB Value and Calculation

and low HLB values (1 8-8 6) Tweens which are polyoxyethylene derivatives of spans are hydrophilic and have high HLB values (9 6-16 7) In order to form stable emulsions an emulsifier or emulsifier mixture having HLB value equal to the HLB value of the oil phase should be used

Get More

HLB Scale

Griffin developed a ranking system to determine 'how hydrophilic' and 'how hydrophobic' a surfactant is Surfactants generally have hydrophobic hydrocarbon chains with hydrophilic branches or ends (this scale is for non-ionic surfactants) The HLB scale is very relative scale the number values of the HLB Scale don't necessarily give insight into the properties of a surfactant just their

Get More

Physico

Nano-emulsions as non-equilibrium systems present characteristics and properties which depend not only on composition but also on their method of preparation To obtain better penetration nanocosmeceuticals use nano-sized systems for the delivery of active ingredients to targeted cells In this work nano-emulsions composed of miglyol rapeseed oil and salmon oil were developed as a

Get More

Hydrophilic

Prsentation La HLB est une mthode propose en 1949 par Griffin [1] qui permet de chiffrer l'quilibre existant entre la partie hydrophile et la partie lipophile de la molcule de tensioactif quilibre li la solubilit dans l'eau L'chelle varie de 0 20 (bornes exclues sinon les molcules ne sont plus des tensioactifs) : plus la valeur est leve plus la solubilit

Get More

THE HLB SYSTEM

• Simple arithmetic for example: – a 50 / 50 blend of steareth-2 and steareth-21 – 50% times the HLB value of the steareth-2 • 0 5 X 4 9 = 2 45 – 50% times the HLB value of the steareth-21 • 0 5 X 15 5 = 7 75 – 2 45 + 7 75 = 10 2 Summary • HLB is a number system that lets you know how oils and surfactants will likely interact • Surfactants have an HLB

Get More

Emulsions: When Oil and Water Do Mix

An HLB less than 6 favors water in oil emulsions a value greater than 8 favors oil in water emulsions Values of 7– 9 indicate good wetting agents Other common emulsifiers found in foods include proteins gums and various esters of fatty acids and poly hydroxyl

Get More

Emulsion Properties of Mixed Tween20

increase in droplet size Mter seven days the oil droplet sizes oflower HLB (8 to 13) increased whereas at higher HLB number (13 to 16 7) the emulsion exhibited a rather constant droplet size However the droplet size of 20:80 weight ratio ofMGT:G system was larger than the 10:90 system The weak oil

Get More

EMULSIONS

EMULSIONS types Introduction to Dispersed Systems Slide 1 Principles of Light PowerPoint Hybrid emulsion detector for the neutrino factory Emulsions Bitumen emulsions in India emulsifier Emulsion - Dr Ted Williams PPT here PowerPoint 프레젠테이션 - DAIVIETENVITECH JSC History of Photography in Astronomy EMULSIONS - India Study Channel PowerPoint 프레젠테이션

Get More

Emulsion System

In general when system is cooled at 25C–30C below HLB temperature then stable NE with low polydispersity can be formulated [36] Main drawback of this method is that the thermolabile agents including excipients cannot be used as temperature plays crucial role in PIT [14 48]

Get More

PRACTICAL 1: EMULSION

20 05 2014Emulsion is a thermodynamically unstable two phase system It contain at least two immiscible liquids which one of them is dispersed homogenously (dispersed phase) in another liquid (continuous phase) Emulsion can be classified as two types: water in oil emulsion and oil in water emulsion Emulsion can be stabilised by adding the emulsifying agent Emulsifying agent can be

Get More

Emulsification for castor biomass oil

Comparing the castor oil-water emulsion with methanol-castor oil-water emulsion the optimal hydrophilic and lipophilic balance (HLB) value based on castor oil-water system was acquired between 6 6 and 7 5 while the optimal HLB value based on the methanol-castor oil-water system was between 5 5 and 6 0 The optimal HLB value of methanol-castor oil-water system gradually moved to that of

Get More

Surfactants – classification features and applications

Relation between HLB and surfactant applications HLB 8 HLB 10 • Mixing unlike oils together – surfactants with HLB's of 1 to 3 • Preparing water-in-oil emulsions – surfactants with HLB's of 4 to 6 • Preparing self emulsifying oils

Get More

Nano Emulsion

They are used for emulsions considering each HLB (hydrophilic-lipophilic balance) values Generally if a continuous phase is hydrophilic high HLB value surfactants are used and if the continuous phase is hydrophobic low HLB value surfactants are used After adding specific surfactant mechanical shear is needed to form an emulsifying state

Get More

Microemulsions: As drug elivery system

microemulsion is a system of water oil and amphiphilic compounds (surfactant and co-surfactant) which is a Unlike coarse emulsions micronized with external energy microemulsions are based on low interfacial tension This (HLB) 10 as well as the critical packing parameter

Get More

Experiment 1: Emulsion

HLB System enables us to assign a number to the ingredient or combination of ingredients we want to emulsify and then to choose an emulsifier or blend of emulsifiers having this same number The HLB value for the combination of emulsifying agent can be calculated by using this formula: Surfactants with a low HLB are more lipid loving and thus tend to make a water in oil emulsion while those

Get More

THE HLB SYSTEM

• Simple arithmetic for example: – a 50 / 50 blend of steareth-2 and steareth-21 – 50% times the HLB value of the steareth-2 • 0 5 X 4 9 = 2 45 – 50% times the HLB value of the steareth-21 • 0 5 X 15 5 = 7 75 – 2 45 + 7 75 = 10 2 Summary • HLB is a number system that lets you know how oils and surfactants will likely interact • Surfactants have an HLB value – the higher

Get More

Submit Your Paper as a PDF File without Page Numbers by

The HLB system The HLB system was introduced ( ICI12a and Griffin12b) in the late 1940's somewhat analogous to the octane number for car fuels The system was meant as a tool for designing stable emulsions When needed e g in food and medical industry one should select emulsifiers with similar number to the oil or fat which is used HLB

Get More

THE HLB SYSTEM

• Simple arithmetic for example: – a 50 / 50 blend of steareth-2 and steareth-21 – 50% times the HLB value of the steareth-2 • 0 5 X 4 9 = 2 45 – 50% times the HLB value of the steareth-21 • 0 5 X 15 5 = 7 75 – 2 45 + 7 75 = 10 2 Summary • HLB is a number system that lets you know how oils and surfactants will likely interact

Get More

Solving Emulsion Stability Issues

Avoid instability issues in your cosmetic emulsions (O/W W/O HIPE Pickering) by learning how to quickly select surfactants characterize emulsions Minou Nabavi (Founder Azad Chem Consulting) will explain the causes of instability (creaming flocculation Ostwald ripening) and share practical strategies to detect counter the challenges Topics like how to make an emulsion

Get More

MULTIPLE EMULSIONS

Preparation techniques Multiple emulsions can be prepared by any of the numerous methods for the preparation of conventional emulsion system including sonication agitation and phase inversion Great care must be exercised in the preparation of the final system However because vigorous treatments normally employed for the preparation of primary emulsions will often break the primary

Get More

7 3 2 HLB systemIn spite of many advances in the theory

of varying HLB It is assumed that the HLB of a mixture of two surfactants containing fraction f of A and (l 0 f) of B is the algebraic mean of the two HLB numbers: (7 18) For reasons not explained by the HLB system but from other approaches mixtures of high HLB and low HLB give more stable emulsions than do single surfactants Apart

Get More

Multiple W/O/W emulsions—Using the required HLB for

Stable emulsions are best formulated with emulsifiers or combinations of emulsifiers which possess HLB values close to the required HLB of the oil phase In this work we have investigated the application of this established method to the development of multiple emulsions This is of particular interest since multiple emulsions are highly sensitive in terms of variations of the individual

Get More

HLB Scale (hydrophile

HLB system has an arbitrary scale of 1 - 18 HLB RANGE USE 0-3 Anti foaming agent 4-6 W/O emulsifying agent 7-9 wetting agent 8-18 O/W emulsifying agent 13-15 Detergents 10-18 stabilizing agent -Higher the HLB value means more number of hydrophilic groups in the molecule Mean more water soluble or hydrophilic the surfactant is -The lower the HLB value the more lipophilic or oil

Get More

Emulsions and the HLB System

Emulsions and the hlb system Convergent cosmetics 2393 blaine avenue orono mn 55391 (952) 906-0771 fax: (952) 906-9781 om emulsions and the hlb systemTime saving guide to surfactant selection The hlb system a time saving guide to surfactant selection presentation to the midwest chapter of the society of

Get More

HLB Balance

HLB Balance Table of HLB Values Matching HLB to Applications Application HLB Value Required Mixing unlike oils together 1 - 3 Making water-in-oil emulsions 4 - 6 Wetting powders into oils 7 - 9 Making self emulsifying oils 7 - 10 Making oil-in-water emulsions 8 - 16 Making detergent solutions 13 - 15 Solubilising oils into water (micro-emulsifying) 13 - 18 Emulsifier HLB Number Sucrose

Get More

News

  • Vapor Pressure of Aqueous Solutions of Ethylene Glycol
  • Images for how to make isomalt ice cubes
  • captan trade name
  • Risk Assessment for Pharmaceuticals
  • vitamin c weight loss forum
  • What Does CBA Mean
  • Grandpas Diatomaceous Earth
  • Stevia Uses Side Effects Interactions Dosage and Warning
  • Industrial Uses of Heptane Bell Chem
  • Aluminum Magnesium Oxide
  • Fumaric acid price buy Fumaric acid
  • red 40 made of
  • warehouse associate
  • dog food
  • What s the deal with alcohol
  • google ad manager console
  • is code for silica fume
  • 582-25-2
  • Copyright © 2014. All rights reserved.
    ^ Back to Top