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Silicon‐modified carbohydrate surfactants. IV. The impact of substructures on the wetting behaviour of siloxanyl‐modified carbohydrate surfactants on low‐energy surfaces
Author(s) -
Wagner R.,
Richter L.,
Weißmüller J.,
Reiners J.,
Klein K. D.,
Schaefer D.,
Stadtmüller S.
Publication year - 1997
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/(sici)1099-0739(199707)11:7<617::aid-aoc618>3.0.co;2-d
Subject(s) - chemistry , wetting , pulmonary surfactant , surface tension , contact angle , carbohydrate , aqueous solution , critical micelle concentration , micelle , chemical engineering , molecule , organic chemistry , thermodynamics , engineering , biochemistry , physics
The siloxanyl‐modified carbohydrate surfactants investigated consist of the four structural elements: (1) siloxanyl moiety; (2) spacer; (3) carbohydrate unit; and (4) modifying element. By static surface tension (γ sν — γ sβ α) measurements the contact angles of the aqueous surfactant solutions above the critical micelle formation concentration (cmc) on nonpolar perfluorinated surfaces (FEP ® plate) were determined. Although the siloxanyl units were found to have a high capacity to level out the interfacial properties, both surface tension and wetting tension react independently to defined changes in the chemical structure of the surfactant molecules. The results of spreading experiments on polyproylene show good correlation with the dependences found by wetting meaurements. © 1997 John Wiley & Sons, Ltd.