Synthesis and properties of some novel nonionic polyol surfactants
作者:Catherine B. A. Briggs、Ian M. Newington、Alan R. Pitt
DOI:10.1039/c39950000379
日期:——
A homologous series of nonionic surfactants 4 based on sugar lactones has been synthesised and evaluated.
我们合成并评估了基于糖内酯的同源系列非离子表面活性剂 4。
Silver halide photographic material
申请人:Fuji Photo Film Co., Ltd.
公开号:US05221603A1
公开(公告)日:1993-06-22
A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein the silver halide emulsion layer or another hydrophilic colloid layer contains a compound represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom or a substituted or unsubstituted hydrocarbon group having 1 to 30 carbon atoms, and at least one of R.sub.1 and R.sub.2 represents a substituted or unsubstituted hydrocarbon group, including an alkyl group having not less than 6 carbon atoms; L represents a divalent bonding group; and M represents a hydrogen atom or a cation.
Non-ionic surface active compounds and photographic materials containing
申请人:Eastman Kodak Company
公开号:US04892806A1
公开(公告)日:1990-01-09
The invention provides water soluble surface active compounds having the formula ##STR1## wherein each of R.sup.1 and R.sup.2 independently is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, or substituted or unsubstituted aryl, provided that not both R.sup.1 and R.sup.2 are hydrogen, and each of x and y independently is an integer from 3 to 6. In a preferred embodiment where discrete compounds are required, R.sup.1 and R.sup.2 are identical and x and y are identical. Particularly preferred compounds are those wherein each of R.sup.1 and R.sup.2 is an alkyl group having from 5 to 8 carbon atoms, more preferably from 6 to 7 carbon atoms, and each of x and y is an integer from 3 to 6.
Non-ionic surface active compounds and photographic materials containing them
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0314425B1
公开(公告)日:1992-10-28
Neutron Reflection Study of a Double-Chained Sugar Surfactant
作者:D. J. Cooke、J. R. Lu、E. M. Lee、R. K. Thomas、A. R. Pitt、E. A. Simister、J. Penfold
DOI:10.1021/jp960149q
日期:1996.1.1
Neutron reflection and surface tension have been used to investigate the structural features exhibited at the air-liquid interface by an adsorbed layer of the sugar-based nonionic surfactant 7,7-bis[(1,2,3,4,5-pentahydroxyhexanamido)methyl]-n-tridecane. It consists of two glucamide headgroups and two C6H13 alkyl chains, i.e., (C6H13)(2)C(CH2NHCO(CHOH)(4)CH2OH)2, abbreviated to di(C-6-Glu). Isotopic substitution was used to distinguish the chains of the surfactant from the headgroup and solvent distributions. The critical micelle concentration (CMC) was found to be (1.9 +/- 0.1) x 10(-3) M using surface tension measurements, and the latter also indicated that the surface properties were not affected by isotopic substitution. The specular reflection of neutrons has been used to determine the surface concentrations of skeletally deuterated di(C-6-Glu) over the concentration range CMC/400 to 2CMC. The neutron measurements showed the area per molecule A at the CMC to be 66 +/- 3 Angstrom 2, as compared with 60 +/- 10 Angstrom(2) from surface tension measurements. The layer structure has been determined using three different isotopic contrasts at concentrations of CMC and CMC/400. The fit of a two-layer model shows that the total monolayer thickness decreases from 17.5 +/- 1.5 Angstrom at the CMC to 14.5 +/- 1.5 Angstrom at CMC/400, respectively. The kinematic approximation was used to fit the neutron data and an X-ray reflection profile. The most remarkable feature of the structure obtained is the apparent smoothness of the layer. The calculated roughness of the layer at the CMC is 9.7 Angstrom(2) which corresponds exactly to the value expected for capillary waves using the model of a pure liquid. At the CMC the molecule as a whole appears to be tilted about 35-40 degrees away from the surface normal, but at CMC/400 the hydrocarbon chains are approximately normal to the surface while the gluconamide groups are strongly tilted.