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Preparation and surface‐ active properties of new amphipathic compounds with two phosphate groups and two long‐ chain alkyl groups
Author(s) -
Zhu Yun peng,
Masuyama Araki,
Okahara Mitsuo
Publication year - 1991
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/bf02657622
Subject(s) - alkyl , chemistry , amphiphile , solubility , aqueous solution , phosphate , ethylene glycol , micelle , organic chemistry , surface tension , polymer chemistry , copolymer , polymer , physics , quantum mechanics
New compounds bearing two dihydrogen phosphate groups and two long‐ chain alkyl groups (octyl or decyl) were prepared in good yields by the reaction of 1,ω‐ bis (alkyloxymethyl)‐ oligo (ethylene glycol)s with polyphosphoric acid. Amphipathic di‐ or tetrasodium phosphates were obtained by neutralization of the free acids with sodium hydroxide, and their surface‐ active properties in water were measured. Almost all these di‐ or tetrasodium phosphates showed good water solubility. Their abilities to form micelles and to lower surface tension were fairly good as compared with general monoalkyl phosphates consisting of one longer alkyl chain and one hydrophilic group. The foaming property of aqueous solutions of the tetrasodium salts was different from that of the disodium salts. The former showed very low foaming ability.