Chlebicki J, Majtyka P
Institute of Organic and Polymer Technology, Wroclaw University of Technology, Wroclaw, 50-370, Poland
J Colloid Interface Sci. 1999 Dec 1;220(1):57-62. doi: 10.1006/jcis.1999.6476.
In this work, as a continuation of our studies concerning the preparation and surface properties of nonionic surfactants, derivatives of 1,3-dialkoxy-2-propanols and 1,3-dialkoxy(oligooxypropylene)-2-propanols with oligooxypropylene chains have been synthesized and investigated. The surface activity of these compounds has been determined, i.e., critical micelle concentration (CMC), surface excess concentration (Gamma), surface area demand per molecule (A), surface tension at CMC (gamma(CMC)), DeltaG(ads)( degrees ), and DeltaG(mic)( degrees ). A linear decrease of the log CMC vs number of oxypropylene groups is observed, and based on the Shinoda equation the work of cohesion per oxypropylene group when passing from molecular to micellar state is calculated for 0.43 kT. The equivalent of CH(2) in the aliphatic alcohol group is ca. 2.50 oxypropylene units. Surface properties of these surfactants, i.e., cloud point, wetting ability, contact angle, foam height, and emulsion stability type (O/W), have been determined as well. Copyright 1999 Academic Press.
在本研究中，作为我们关于非离子表面活性剂的制备及其表面性质研究的延续，我们合成并研究了带有低聚氧化丙烯链的1,3 - 二烷氧基 - 2 - 丙醇和1,3 - 二烷氧基（低聚氧化丙烯） - 2 - 丙醇的衍生物。测定了这些化合物的表面活性，即临界胶束浓度（CMC）、表面过剩浓度（Gamma）、每个分子的表面积需求（A）、临界胶束浓度时的表面张力（gamma(CMC)）、吸附自由能（DeltaG(ads)( degrees )）和胶束化自由能（DeltaG(mic)( degrees )）。观察到log CMC随氧化丙烯基团数量呈线性下降，并根据筱田方程计算出从分子态转变为胶束态时每个氧化丙烯基团的内聚能为0.43 kT。脂肪醇基团中CH(2)的当量约为2.50个氧化丙烯单元。还测定了这些表面活性剂的表面性质，即浊点、润湿能力、接触角、泡沫高度和乳液稳定性类型（O/W）。版权所有1999年学术出版社。
