Approximately 25 cm * 25 cm large sheets of crosslinked highly porous poly(glycidyl methacrylate-co-ethyleneglycol dimethacrylate-co-ethylhexyl methacrylate) membranes with an average thicknesses between 285 and 565 m were prepared by casting a high internal phase emulsion (HIPE) containing monomers onto glass substrates and subsequent polymerisation. Open cellular porous polyHIPE type membranes were obtained with large pores (cavity) sizes between 3 and 10 m while interconnecting pores were between 1 and 3 m. The percentage of ethylhexyl acrylate and ethyleneglycol dimethacrylate influenced the flexibility and morphology of the resulting membranes. Porous membranes were chemically modified with diethylamine to yield functionalised supports for ion exchange chromatography. Cylindrical housings were used for positioning of the membranes and allowing flow of the mobile phase. Pulse experiments were used to study the flow characteristics and a homogeneous flowthrough the entire area of the membrane was found. Bovine serum albumin was purified by a 8 ml column containing functional membrane in modular shape;dynamic binding capacity was measured to be as high as 45 mg/ml.
COBISS.SI-ID: 14668054
This chapter describes the use of colloidal systems, including emulsion droplets, bicontinuous microemulsion channels, water droplets, and solid particles, as templates to create porous polymer materials (Fig. 4.1). Conceptually, the process is general to all types of colloidal dispersion: A biphasic system is created, and the continuous phase (or, in the case of bicontinuous microemulsions, one of the co-continuous phases) is polymerized. The colloidal entities, which are removed following polymerization, thus serveto create porosity in the final polymeric material. Depending on the nature of the colloidal system employed, the characteristic domain size of the porous network can range from a few nanometers to hundreds of micrometers.
COBISS.SI-ID: 14753302