Premium
Synthesis and Properties of Alkyl β ‐ d ‐Galactopyranoside
Author(s) -
Chen Guoyong,
Li Zhencao,
Chen Langqiu,
Ji Shanwei,
Shen Wangzhen
Publication year - 2016
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-016-1865-0
Subject(s) - chemistry , alkyl , thermotropic crystal , solubility , surface tension , dissolution , thermal stability , wetting , liquid crystal , phase (matter) , organic chemistry , chemical engineering , thermodynamics , optics , liquid crystalline , physics , engineering
A series of alkyl β ‐ d ‐galactopyranosides were prepared by the trichloroacetimidate method with d ‐galactose and alcohols with different chain lengths as raw materials. Their solubility, surface tension, emulsification, foaming, wettability, thermotropic liquid crystalline properties, and thermal stability were investigated. Alkyl β ‐ d ‐galactopyranosides are soluble in water and ethanol, and the solubility decreases with increasing alkyl chain length. Decyl β ‐ d ‐galactopyranoside was insoluble in water, but soluble in ethanol. Dissolution of alkyl β ‐ d ‐galactopyranoside in water is an endothermic process with dissolution enthalpies greater than zero. Nonyl β ‐ d ‐galactopyranoside had an excellent emulsifying property, better foaming ability and the best foam stability. The CMC values of alkyl β ‐ d ‐galactopyranosides decrease with increasing of alkyl chain length. Alkyl β ‐ d ‐galactopyranosides are thermally stable up to 270 °C. Alkyl β ‐ d ‐galactopyranosides show the distinctive optical texture of a thermotropic liquid crystal smectic A type phase. Decyl β ‐ d ‐galactopyranoside showed the strongest wettability.