论文部分内容阅读
基于Maurer和Prausnitz的凝胶相平衡条件,建立了凝胶的溶胀模型.模型假设凝胶是以凝胶组分及凝胶吸收的溶液为核心,以弹性半渗透膜为壳的复合体.并采用UNIQUAC方程计算凝胶相及与之共存液相的Gibbs过剩自由能,采用“phantomnetwork”理论计算凝胶的弹性自由能,采用“自由体积”计算分子的尺度效应.同时以N-异丙基丙烯酰胺(IPAAm)为单体合成了IPAAm凝胶.研究了25℃时IPAAm凝胶在丙酮水溶液中的溶胀行为,并测定了丙酮在胶体相和与之共存液相中的分配,以检验模型的关联与预报能力.结果表明,模型预报的单体总量和交联剂浓度对凝胶溶胀的影响与实验符合得很好.而且凝胶溶胀时,能很好地预测丙酮在两相中的分配,表明模型具有很好的关联和预报能力.
Based on the equilibrium conditions of the gel phase of Maurer and Prausnitz, the swelling model of the gel was established.The model assumes that the gel is composed of the gel component and the solution absorbed by the gel as the core, the elastic semipermeable membrane as the shell complex, The Gibbs excess free energy of the gel phase and its co-existing liquid phase was calculated by the UNIQUAC equation. The elastic free energy of the gel was calculated by the “phantomnetwork” theory and the scale effect of the molecule was calculated by “free volume.” Meanwhile, (IPAAm) was synthesized as IPAAm gel.The swelling behavior of IPAAm gel in acetone aqueous solution at 25 ℃ was investigated, and the distribution of acetone in the colloidal phase and its coexisting liquid phase was determined to test the model The results show that the influence of the total amount of monomers and crosslinking agent concentration on the swelling of the gel is in good agreement with the experimental results.And when the gel swells, The distribution shows that the model has a good correlation and forecasting ability.