By Karlheinz Hill, Wolfgang von Rybinski, Gerhard Stoll
Alkyl polyglycosides are a brand new iteration of multi-application, ecologically secure nonionic surfactants that shape a certainly reusable source. Written by means of pioneers within the box, this identify information the technological, ecological, physicochemical and function facets of alkyl polyglycosides, and discusses the present patent state of affairs of those new commercially plausible fabrics.
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Extra resources for Alkyl Polyglycosides: Technology, Properties, and Applications
Fluid lamellar structures fulfill these conditions. If the slide is tilted, there is no further pseudoisotropic orientation in the observation direction and strong birefringence occurs. In this way, pseudoisotropic orientation can be distinguished from isotropic phases. a b C Figure 4. Polarization micrographs of textures of lyotropic phases in C, APG solutions I21; a) L, with pseudoisotropism: 75 Yo by weight at 25 "C after heating to 70°C; b) L,: 90% by weight at 25 "C; c) La,-h:68% by weight at 70°C 42 Dieter Nickel, Thomas Forster, and Wolfgang von Rybinski If a sample containing an L, phase is cooled to determine the Krafft point, the texture changes below a characteristic temperature.
R. Schroder, Tenside Surf. Det. 32 (1995) 515 5. R. Spilker,B. Menzebach, U. Venn, Tenside Surf. Det. 33 (1996) 21 6. N. Buschmann, A. Kuse, S. Wodarczak, Agro Food Industry, Hi-Tech,January/February (1996) 6 7. N. Buschmann, S. Wodarczak, Tenside Surf. Det. 32 (1995)336 8. A. Bruns, H. Waldhoff, W. Stoll 0 VCH Verlagsgesellschaft mbH,1997 4. Physicochemical Properties of Alkyl Polyglycosides Dieter Nickel, Thomas Forster, and Wolfgang von Rybinski The favorable performance properties of surfactants are essentially attributable to specific physicochemical effects [ l l .
Quantification is based on the internal standard method using pentadecanol for calibration. Both HPLC and GC have proven to be reliable in routine analysis for the determination of residual fatty alcohol in alkyl polyglycosides. The particular method selected depends on the problem to be solved and on the experience and equipment available in the laboratory where the analysis is to be performed. 0 3 6 9 12 15 18 21 Run time [minl Figure G. Glucose determination in a C16118alkyl polyglycoside sampleHTGC chromatogram 30 Heinrich Waldhoff,Judith Scherler,Michael Schmitt,and JanR-Varvil utable to glucose in the chromatogram of the silylated sample.
Alkyl Polyglycosides: Technology, Properties, and Applications by Karlheinz Hill, Wolfgang von Rybinski, Gerhard Stoll