Sodium 10-undecenoate

Larabee, C.E., Jr. and Sprague, E.D. (1986) Aggregation of sodium undecanoate and sodium 10-undecenoate in water at 37 °C vapor pressure osmometry. Journal of Colloid and Interface Science, 114 (1), 256-260. 

Electroporation [250] in synthetic unilamellar dioleoylphosphatidyl-choline vesicles of 178nm diameter has been utilized for the preparation of PbS QDs. 3-10 A sized QDs are prepared by initiation of the opening of the pores between the Pb ions originally entrapped in the vesicles and S ions placed in the bulk [251]. 2.7 to 5 nm CdS nanoparticles have been prepared in a mixed vesicle dispersion formed using ionic surfactants, i.e., decyltrimethylammonium bromide and sodium 10-undecenoate [252]. The particle formation was achieved by exposing the vesicles containing the Cd (as a Cd complex of EDTA) to H2S. 

The immobilisation of unsaturated surfactant sodium 10-undecenoate [Cl 1( )] and the saturated surfactant sodium dodecanoate (C12) was carried out on PE surfaces [266] by means of an argon plasma treatment and characterised using XPS and SSIMS techniques. The typical SSIMS spectra for unmodified and modified PE films are shown in Fig. 21. The differences in the SSIMS spectra of PE and that of PE/C11( ) and PE/C11( )-Ar 5 are merely the spectra of the surfactant which can be attributed to the presence of a layer of Cll( ) on the PE sample. The SSIMS analysis showed that during... 

Sodium 10-undecenoate - Hexagonal Phase transition to a lamellar phase Complete conversion [56]... 

Sodium 10-undecenoate - Micellar, hexagonal, lamellar Hj-phase no transitions, L -phase transition to multiphases Partially polymerized, 30% conversion [58]... 

The special restriction caused by tying low molecular mass liquid crystalline substances to a polymer chain was also illustrated with amphiphilic liquid crystals. A hexagonally close-packed structure of rod-like micelle cylinders of sodium 10-undecenoate with about 50% water lost during polyma-ization at 60 °C its structure and became isotropic. On cooling, a lamellar liquid crystalline structure, more suitable to accommodate the macromolecular backbone was found. Bas l on the discussions of Sect. 5.3.4 it is likely that with longer side-chain amphiphiles condis crystals could be grown in analogy to the soaps described in Sect. 5.2.3... 

Sierra, M.B., Morini, M.A., Schulz, P.C. and Ferreira, M.L. (2005) Unusual volumetric and hydration behavior of the catanionic system sodium undecenoate sodium decyltrimethylammonium bromide. Colloid and Polymer Science, 283 (9), 1016-1024. 

Fig. 30. Order parameter for micellar monomeric ( ) and oligomeric ( sodium undecenoate 6 as a function of the position in the hydrophobic tail (C, = -COONA). (Reprinted with kind permission from [69]. Copyright 1990 Academic Press, Orlando)...

Although such micelles, at higher concentration, would probably pack together to form liquid crystal structures, no mention of any mesophase behaviour was made. An earlier study carried out by Thundathil et actually induced polymerization in the liquid crystal phase itself. Sodium undecenoate and water give a hexagonal phase in a concentration range of 44-55 wt% soap at 60°C. When ammonium persulphate (0 05 mol/litre) is present as the initiator, these concentration limits are shifted to 47% and 59% soap. Polymerization was carried out at 60°C and was monitored... 

It is interesting to note that the above study considers polymers having a conformationally restricted polyethylene backbone, which obviously has a profound influence over the orientational capabilities of the molecules. Replacement of this rigid element by a flexible polysiloxane chain ought to relax the side chains in such a way so as to provide a far less restrictive structure. In fact, we have attached sodium undecenoate to a polysiloxane chain of approximately 50 repeat units. The results have shown only a slight modification of phase behaviour, in accordance with a small chain lengthening of the hydrophobic chains. 

Figure 3 describes the preparation of A-co-undecenoyl-L-valine CSP bonded to silica gel. The carboxylic acid group of L-valine was protected by the reaction with isobutylene using the method of Roeske [47]. The formed tert-butyl ester of L-valine was precipitated from diethyl ether as the oxalate by the dropwise addition of a solution of 10% oxalic acid in absolute ethanol. The precipitate is dried and the oxalate group is removed by the reaction of sodium hydroxide. The tert-butyl ester of L-valine was treated with undecenoic acid in tetrahydrofuran (THF), which resulted in A-co-undecenoyl-L-valine methyl ester. In another step, lOmM of monochlorosilane was dissolved in 20 mL of dry pyridine and was allowed to react with /V -to - u ndccenoyl-L-valine methyl ester. 

Undecylenic acid (10-undecenoic acid), when treated with potassium permanganate and sodium periodate in an aqueous solution of potassium carbonate at 20 °C for 20 h, gives sebacic acid (decane dioic acid) in 73% isolated yield [763]. A similar oxidation of oleic or elaidic acid yields a mixture of pelargonic acid and azelaic acid [763] (equation 474). 

AI3-19721 EINECS 222-264-8 Sodium undec-10-enoate Sodium undecylenate 10-Undecenoic, sodium salt Used as a bacteriostat and fungistat In cosmetics and pharmaceuticals. ElfAtochem N. Am. 

Because the free radical initiated graft reaction can also lead to the cross-linking of polyethylene, copolymers of ethylene and with acrylic acid (184,185), glycidyl methacrylate (184,186), methacrylic acid and 10-undecenoic acid (187-189) were synthesized to compatibilize polyethylene/polyamide blends. The poly (ethylene-co-methacrylic acid) ionomers neutralized by sodium (184) and zinc (45,118,190-192) has also used as compatibilizers. High energy irradiation, used to modify the surface of fibers or films at beginning, was also used to compatibilize the polyethylene/polyamide blends (193-196). 

Undecenamide, N-[2-[(2-hydroxyethyl) (2-carboxyethyl) amino] ethyl]-, sodium salt. See Sodium undecylenoamphopropionate 10-Undecenamide, N-[2-[(2-hydroxyethyl) (carboxymethyl) amino] ethyl]-, sodium salt. See Sodium undecylenoamphoacetate Undecenoic acid Undec-10-enoic acid 10-Undecenoic acid 11-Undecenoic acid. See Undecylenic acid... 

Undecenoic acid, sodium salt. See Sodium undecylenate... 

In the case of P. sp. GPOl, the ability of this bacterium to grow on sodium octanoate (Oct)/10-undecenoic acid (Und) mixtures and on pure sodium octanoate has been used. A series of random copolyesters noted as PHOU (Figure 4) have been synthesized from different Oct/Und nutrient compositions (from 100/0 to 0/100). 

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