By Tharwat F. Tadros
Chapter 1 Colloid facets of beauty Formulations with specific connection with Polymeric Surfactants (pages 1–34): Prof. Dr. Tharwat F. Tadros
Chapter 2 formula and Stabilization of Nanoemulsions utilizing Hydrophobically converted Inulin (Polyfructose) Polymeric Surfactant (pages 35–50): Prof. Dr. Tharwat F. Tadros, Martine Lemmens, Bart Levecke and Karl Booten
Chapter three Integrating Polymeric Surfactants in beauty Formulations for the Enhancement in their functionality and balance (pages 51–60): Prof. Dr. Tharwat F. Tadros, Martine Lemmens, Bart Levecke and Karl Booten
Chapter four software of Colloid and Interface technology rules for Optimization of Sunscreen Dispersions (pages 61–78): Lorna M. Kessell, Benjamin J. Naden, Ian R. Tooley and Prof. Dr. Tharwat F. Tadros
Chapter five Use of Associative Thickeners as Rheology Modifiers for Surfactant structures (pages 79–91): Prof. Dr. Tharwat F. Tadros and Steven Housley
Chapter 6 beauty Emulsions according to Surfactant Liquid Crystalline levels: constitution, Rheology and Sensory review (pages 93–105): Prof. Dr. Tharwat F. Tadros, Sandra Leonard, Cornelis Verboom, Vincent Wortel, Marie?Claire Taelman and Frederico Roschzttardtz
Chapter 7 own Care Emulsions according to Surfactant–Biopolymer combinations: Correlation of Rheological Parameters with Sensory Attributes (pages 107–126): Prof. Dr. Tharwat F. Tadros, Sandra Leonard, Cornelis Verboom, Vincent Wortel, Marie?Claire Taelman and Frederico Roschzttardtz
Chapter eight Correlation of “Body Butter” Texture and constitution of beauty Emulsions with Their Rheological features (pages 127–144): Prof. Dr. Tharwat F. Tadros, Sandra Leonard, Cornelis Verboom, Vincent Wortel, Marie?Claire Taelman and Frederico Roschzttardtz
Chapter nine Interparticle Interactions in colour Cosmetics (pages 145–168): Lorna M. Kessell and Prof. Dr. Tharwat F. Tadros
Chapter 10 Starch?Based Dispersions (pages 169–246): Ignac Capek
Chapter eleven In Vivo dermis functionality of a Cationic Emulsion Base compared to an Anionic method (pages 247–257): Slobodanka Tamburic
Chapter 12 The effect of Urea at the Colloidal constitution of Alkylpolyglucoside?Based Emulsions: Physicochemical and In Vitro/In Vivo Characterization (pages 259–274): Snezana Savic, Slobodanka Tamburic, Biljana Jancic, Jela Milic and Gordana Vuleta
Chapter thirteen versions for the Calculation of sunlight security components and Parameters Characterizing the UVA safeguard skill of beauty Sunscreens (pages 275–308): Bernd Herzog
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Content material: bankruptcy 1 Colloid elements of beauty Formulations with specific connection with Polymeric Surfactants (pages 1–34): Prof. Dr. Tharwat F. TadrosChapter 2 formula and Stabilization of Nanoemulsions utilizing Hydrophobically converted Inulin (Polyfructose) Polymeric Surfactant (pages 35–50): Prof.
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Additional info for Colloids in Cosmetics and Personal Care, Volume 4
To achieve the above eﬀect, it is useful to use A–B–A block copolymers that are soluble in the oil phase and insoluble in the continuous phase. g. hydrophobically modiﬁed inulin, INUTEC SP1 (ORAFTI, Belgium], as will be discussed below. Two methods may be applied for the preparation of nanoemulsions (covering the droplet radius size range 20–200 nm): use of high-pressure homogenizers (aided by appropriate choice of surfactants and cosurfactants) or application of the phase inversion temperature (PIT) concept.
The ﬁrst is unfavorable mixing of the stabilizing chains A of the adsorbed layers, when these are in good solvent conditions. 5 Steric Stabilization of Nanoemulsions and the Role of the Adsorbed Layer Thickness the adsorbed layer and w is the Flory–Huggins (polymer–solvent interaction) parameter. e. repulsive, w should be lower than 12 ) and the adsorbed layer thickness d. The second eﬀect is a reduction in the conﬁgurational entropy of the chains on signiﬁcant overlap. This referred to as elastic (entropic) interaction and is given by the expression Gel ¼ 2n2 ln WðhÞ WðyÞ ð8Þ where n2 is the number of chains per unit area, W (h) is the conﬁgurational entropy of the chains at a separation distance h and W (l) is the conﬁgurational entropy at inﬁnite distance of separation.
E. one coherence area, this intensity ﬂuctuation can be measured. The analog output is digitized using a digital correlator that measures the photocount (or intensity) correlation function of the scattered light. The photocount correlation function G (2)(t) is given by the equation Gð2Þ ðtÞ ¼ Bf1 þ g 2 ½g ð1Þ ðtÞ 2 g ð2Þ where t is the correlation delay time. The correlator compares G (2)(t) for many values of t. B is the background value to which G (2)(t) decays at long delay times, g (1)(t) is the normalized correlation function of the scattered electric ﬁeld and g is a constant (P1).