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1943年Flory提出第一个凝胶溶胀理论以来,凝胶溶胀理论的发展极大地促进了凝胶科学的发展.在诸多凝胶溶胀理论中,Flory-Rehner凝胶溶胀理论是最为经典的理论之一,成功地预测了聚合物胶体的诸多溶胀变形特性.但该模型是基于一种最为简单的自由连接链模型,存在精度较差的局限.因此,本文采用能够表征网络缠结拓扑等微观结构影响的弹性自由能模型,即由Edwards-Vilgis提出的Slip-Link模型,构造自由能模型并形成pH敏感凝胶的平衡溶胀理论,并基于Abaqus有限元分析了微观结构及几何限制作用对pH敏感凝胶力学行为的影响.分析结果可为微流体控制阀的设计提供参考.
Since Flory proposed the first theory of gel swelling in 1943, the development of gel swelling theory has greatly contributed to the development of gel science.In many gel swelling theories, Flory-Rehner gel swelling theory is the most classical theory First, many swelling and deformation properties of polymer colloids have been successfully predicted, but the model is based on the simplest free-connection chain model, which has the limitations of poor accuracy.Therefore, in this paper, the microstructure The elastic free energy model, which is called Slip-Link model proposed by Edwards-Vilgis, constructs the free energy model and forms the equilibrium swelling theory of pH-sensitive gel. Based on the Abaqus finite element analysis, the microstructure and geometric constraints are sensitive to pH Gel mechanical behavior.The results of the analysis can provide a reference for the design of microfluidic control valve.