title: μPIV methodology using model systems for flow studies in heterogeneous biopolymer gel microstructures.
abstract: A methodology for studying flow in heterogeneous soft microstructures has been developed. The methodology includes: (1) model fractal or random heterogeneous microstructures fabricated in PDMS and characterised using CLSM; (2) μPIV measurements; (3) Lattice-Boltzmann simulations of flow. It has been found that the flow behaviour in these model materials is highly dependent on pore size as well as on the connectivity and occurrence of dead ends. The experimental flow results show good agreement with predictions from the Lattice-Boltzmann modelling. These simulations were performed in geometries constructed from 3D CLSM images of the actual PDMS structures. Given these results, mass transport behaviour may be predicted for even more complex structures, like gels or composite material in, e.g., food or biomaterials. This is a step in the direction towards predictive science with regards to tailoring soft biomaterials for specific mass transport properties.
authors.affiliation: Structure and Material Design, SIK-The Swedish Institute for Food and Biotechnology, Gothenburg, Sweden. kristin.sott@sik.se
authors.forename: Kristin
authors.initials: K
authors.lastname: Sott
authors.forename: Tobias
authors.initials: T
authors.lastname: Gebäck
authors.forename: Maria
authors.initials: M
authors.lastname: Pihl
authors.forename: Niklas
authors.initials: N
authors.lastname: Lorén
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Hermansson
authors.forename: Alexei
authors.initials: A
authors.lastname: Heintz
authors.forename: Anders
authors.initials: A
authors.lastname: Rasmuson
mesh_terms: D001704:Biopolymers / Q000737:chemistry*; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D005782:Gels; D008422:Materials Testing / Q000379:methods*; D008956:Models, Chemical; D009757:Nylons / Q000737:chemistry*
chemical_list: D001704:Biopolymers; D004129:Dimethylpolysiloxanes; D005782:Gels; D009757:Nylons; C085707:poly(dimethylsiloxane)-polyamide copolymer