Hydrophobically modified inulin

To achieve the above effect it is useful to use A-B-A block copolymers that are soluble in the oil phase euid insoluble in the continuous phase. A strongly adsorbed polymeric surfactant that has limited solubility in the aqueous phase can also be used (e.g. hydrophobically modified inulin, 1NUTEC SP1 - ORAFTl, Belgium) as will be discussed below. 

Recently, a novel graft copolymer of hydrophobically modified inulin (INUTEC S PI) has been used in emulsion polymerization of styrene, methyl methacrylate, butyl acrylate and several other monomers. All lattices were prepared by emulsion polymerization using potassium persulfate as initiator. The z-average particle size was determined by photon correlation spectroscopy (PCS) and electron micrographs were also taken. 

Solution Properties of Long-Chain Inulin and Hydrophobically Modified Inulin (HMI)... 

Nestor, J., Esquena, J., Solans, C. et al. (2005) Emnlsion polymerization of styrene and methyl methacrylate using a hydrophobically modified inulin and comparison with other surfactants. Langmuir, 21 (11), 4837-4841. 

Exerowa, D., Gotchev, G., Kolarev, T. et al. (2007) Interaction forces in thin liqnid films stabilized by hydrophobically modified inulin polymeric surfactant. 2. Emulsion films. Langmuir, 23 (4), 1711-1715. 

Thin liquid films have proven their advantages in the study of interaction forces in foam, emulsion, and wetting films stabilized by various types of surfactants see, for example. Refs. l-3]. DLVO and non-DLVO surface forces that stabilize these films have been established in many cases the relation between surface forces and film stability has also been found. Recently, several authors have reported results of model experiments with thin liquid films (foam, emulsion and wetting films) stabilized by polymeric surfactants. In our laboratories all three types of films from aqueous solutions of A-B-A triblock copolymers [4—6] or AB hydrophobically modified inulin [8-10] have been studied. The corresponding disperse systems (foams, emulsions, suspensions) stabilized by AB polymeric surfactants have also been studied extensively see, for example. Refs. [11-14]. It was supposed that the stabilizing forces are steric surface forces but they have not been directly proven and quantitatively studied. 

Foam Films Stabilized by Hydrophobically Modified Inulin Polymeric Surlactants. Loop-to-Loop Interaction... 

We consider here another steric interaction - the loop-to-loop interaction. It is observed in foam films from aqueous solutions of hydrophobically modified inulin INUTEC SPl. The alkyl chains are strongly adsorbed at the air-water interface, leaving loops of polyfmctose in the aqueous phase. The loops remain hydrated in the presence of high electrolyte concentrations [12, 14]. 

For INUTEC SPl, the graft polymeric surfactant based on hydrophobically modified inulin, the critical dectrolyte concentration, Cdo, that separates DLVO from non-DLVO interactions is 5 x 10 moldm [8j. The effect of the electrolyte on the electrostatic component of disjoining pressure is dearly seen, and the film thickness remains constant h =ll nm) above where steric interactions are acting. 

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