Tararyshkin Denis, Kramarenko Elena, Khokhlov Alexei
Physics Department, Moscow State University, Moscow 119992, Russia.
J Chem Phys. 2007 Apr 28;126(16):164905. doi: 10.1063/1.2731784.
The behavior of lightly cross-linked polyelectrolyte hydrogel swelling in the solution of oppositely charged surfactants is studied theoretically. It is shown that if there is a lack of surfactant in the solution intragel separation into two phases differing in swelling ratios and surfactant content can take place. The surfactant ions concentrate and form micelles in a part of the gel and this part collapses while the rest of the gel remains swollen. The two-phase region widens with an increase of ionization degree of the gel subchains.
对轻度交联的聚电解质水凝胶在带相反电荷表面活性剂溶液中的溶胀行为进行了理论研究。结果表明，如果溶液中表面活性剂不足，凝胶内部会分离成两个在溶胀率和表面活性剂含量上不同的相。表面活性剂离子在凝胶的一部分中浓缩并形成胶束，这部分凝胶会塌陷，而其余部分凝胶仍保持溶胀状态。随着凝胶子链电离度的增加，两相区域会变宽。
