Pressure assisted manufacturing of a novel polymer infiltrated ceramic with interpenetrating matrices
Particularly in the fields of medical and light weight constructions applications, composite materials increased construction possibilities, manageability and efficiencies. An example of these successfully used materials is polymer/ceramic composites. They are intensively used in the medical and engineering sectors, when the mechanical properties of polymers are insufficient. Different from the classical approach, where ceramic particles are imbedded in a polymer matrix, this novel composite material consists of two self-interpenetrating matrices. The interpenetrating structure is generated by infiltrating a liquid monomer in a porous ceramic precursor succeeded by a polymerization process. While the infiltration of a precursor with huge pore radius can be reached easily by capillary force s, the infiltration of precursors with nano-scale capillaries is difficult to achieve. Unfilled domains as well as other failures in the microstructure, like surface boundary loss between the polymer and the ceramic, (generated by the volume reduction during the polymerization) can affect the general applicability and the mechanical properties of the composite. Therefore, the first aim of this study was to design an infiltration method for nano-scale precursors which guarantees complete monomer filling. The second aim was to investigate a polymerization method that compensates polymerization shrinkage and therefore avoids surface boundary loss.
Herstellung und Qualifizierung eines Keramik-Polymer-Verbundwerkstoffs durch druckunterstützte Polymerisation einer porösen Keramik