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Lactose‐derived surfactants: II. Fatty esters of lactitol
Author(s) -
Scholnick F.,
BenEt G.,
Sucharski M. K.,
Maurer E. W.,
Linfield W. M.
Publication year - 1975
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02639154
Subject(s) - chemistry , lactose , stearate , catalysis , solubility , organic chemistry , ethylene oxide , copolymer , polymer
Lactitol, prepared by reduction of lactose, was transesterified successfully with a series of fatty methyl esters with the aid of alkaline catalysts at 90 C. This was in marked contrast to previous experiences with lactose. Lactitol laurate, palmitate, stearate, and tallowate were prepared in this manner. Their surface‐active properties, such as detergency, emulsification time, and lime soap dispersant requirement, were comparable to those of corresponding lactose derivatives. Addition of ethylene oxide to the esters was accomplished under conditions of alkaline catalysis and elevated temperatures. Surface‐active properties of the oxyethylated derivatives were compared with those of the unoxyethylated esters described above. The improvement in surface‐active properties is ascribed primarily to an increase in water solubility. Biodegradation studies under aerobic conditions showed that the rate of degradation of lactitol and lactose palmitates equalled or exceeded that of sodium hexadecyl sulfate.