Structuring of magnetic particle doped biopolymers by magnetica

该项目的目的是远程控制由可熔融生物聚合物（特别是葡聚糖酯）和磁性纳米颗粒组成的生物相容性杂化材料的性能，通过磁场在基质和颗粒之间的相互作用。将分别研究如何产生粒子的局部富集和结构（即磁各向异性）。通过这样的各向异性或颗粒富集在表面附近的表面性质可以影响依赖于葡聚糖酯的结构。这导致了与应用相关的宏观特性，如比吸收率（在交流磁场中的加热行为），粗糙度，润湿性等。此外，还将研究是否会发生或诱导基体材料的重取向（相分离、结晶）。复合样品将通过光学和拉曼光谱、电子显微镜、磁性方法和表面能测量进行表征。在成功实施该概念的情况下，生物膜或细胞的处理是可能的。

Aim of the project is remote control of the properties of biocompatible hybrid materials consisting of meltable biopolymers (especially dextran esters) and magnetic nanoparticles by means of interaction between matrix and particles using magnetic fields. It will be investigated how a local enrichment of particles and a structural i.e. magnetic anisotropy, respectively, can be generated. By such an anisotropy or particle enrichment near the surface surface properties can be influenced in dependence on the structure of the dextran ester. That leads to macroscopical properties relevant for applications, like the specific absorption rate (heating behavior in an AC-magnetic field), roughness, wettability etc. Moreover It will be investigated if a reorientation of matrix material (phase separation, crystallization) takes place or can be induced. The composite samples will be characterized by optical and Raman spectroscopy, electron microscopy, magnetic methods and measurement of the surface energy. In case of a successful implementation of the concept a treatment of biofilms or cells is possible.