Aim of this work is to model a multiphasic porous material modified with a hydrogel made from a granulate of Superabsorbent Polymers (SAP). The void space of the material is simultaneously filled with two interacting phases, namely a chemically active hydrogel and a multi-component aqueous pore fluid. The hydrogel has the ability to absorb and retain large amounts of the pore fluid. Depending on the pore fluid chemistry, the hydrogel is also able to reverse the absorption process by releasing absorbed solution. The overall material is finally classified as a functional porous material since the macroscopic material properties depend on the interaction within the pore space. For instance, swelling of the hydrogel within the pore space changes the morphology of the porous media and influences the hydraulic permeability and the mechanical stiffness. Absorption and desorption processes are modeled in a thermodynamic-consistent framework, while constitutive equations for mass transfer are proposed in accordance to polymer chemistry. Experiments have been carried out and inherent model parameters are identified by a Monte-Carlo method. The predicted results of the derived model are in good accordance to experimental findings. Through the reversibility of the phase transition process, the material becomes an excellent candidate of a functional porous media, e. g. a sophisticated filter, which adapts its hydraulic permeability to the pore fluid chemistry.

这项工作的目的是建模由水凝胶改性的多相多孔材料，该水凝胶由超吸收性聚合物（SAP）制成。材料的空隙空间同时充满两个相互作用的相，即化学活性水凝胶和多组分含水孔隙流体。水凝胶具有吸收和保留大量孔隙流体的能力。根据孔隙流体的化学性质，水凝胶还能够通过释放吸收的溶液来逆转吸收过程。由于宏观材料特性取决于孔隙空间内的相互作用，因此最终将整个材料归类为功能性多孔材料。例如，水凝胶在孔空间内的溶胀改变了多孔介质的形态并影响了水力渗透率和机械刚度。吸收和解吸过程是在热力学一致的框架中建模的，而传质的本构方程是根据高分子化学提出的。已经进行了实验，并通过蒙特卡洛方法确定了固有的模型参数。派生模型的预测结果与实验结果非常吻合。通过相变过程的可逆性，该材料成为功能性多孔介质（例如，多孔质）的极佳候选材料。G。精密的过滤器，使其水力渗透性适应孔隙流体的化学性质。已经进行了实验，并通过蒙特卡洛方法确定了固有的模型参数。派生模型的预测结果与实验结果非常吻合。通过相变过程的可逆性，该材料成为功能性多孔介质（例如，多孔介质）的极佳候选材料。G。精密的过滤器，使其水力渗透性适应孔隙流体的化学性质。已经进行了实验，并通过蒙特卡洛方法确定了固有的模型参数。派生模型的预测结果与实验结果非常吻合。通过相变过程的可逆性，该材料成为功能性多孔介质（例如，多孔介质）的极佳候选材料。G。精密的过滤器，使其水力渗透性适应孔隙流体的化学性质。