摘要
本文用振动电极法测定了国内外6种表面活性剂在空气—水界面上成膜的△V—A 曲线,找到了每种表面活性剂分子在表面上紧密排列所占的表面积σ,计算了分子的偶极矩μ,井与分子量、溶胀等数值进行了比较。结果表明,产生溶胀小的表面活性剂是分子的σ值大、μ值高的较大分子量的物质。这种物质的分子在界面上成膜坚实牢固,不易产生包藏作用。因此,我们认为抑制溶胀的合适的表面活性剂应是一种分子的σ值大、μ值高的较大分子量的聚合物。
The ΔV—A cure of six—kind surfactants are measured by the vib-
rating electrode method.The area occupied σ of surfactant molecules are
found; the dipole moment μ are calculated; and the σ,μ with moecule
weight M,swelling Q are compared.It is shown that the swelling is
relatively small if the σ,μ,M of surfactant are higher,the film formed
of this surfactant molecules is very hard,so the swelling due to occlu-
sion is small.Therefore we think a suitable surfactant controlling sw-
elling is a polymer of high—area σ,of high—dipole moment and of
high—molecule weight.
出处
《膜科学与技术》
CAS
CSCD
1990年第2期21-25,共5页
Membrane Science and Technology
基金
国家自然科学基金资助项目
