Everything about Microspheres
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  • Dual nanocomposite multihollow polymer microspheres prepared by suspension polymerization based on a multiple pickering emulsion

    Excerpts from an interesting approach to creating hollow polymer microspheres from a pickering emulsion.

    Abstract:

    A solid-stabilized multiple w/o/w or o/w/o emulsion was prepared in a two-step process. Various nanocomposite polymer microspheres with multihollow armored closed pores were fabricated easily by suspension polymerization of the multiple Pickering stabilized emulsions.

    Continue reading “Dual nanocomposite multihollow polymer microspheres prepared by suspension polymerization based on a multiple pickering emulsion” »

  • Chitosan microspheres prepared by spray drying

    Spray drying has been used in the production of fine powders from emulsions for many years, but it is not a process in which most people associate the production of microspheres.  This journal article shows how the authors were able to produce highly spherical microspheres in the 2-10um range by controlling the levels of Chitosan and crosslinking agents used.

    Chitosan MicrospheresThe key items I found of interest in this article were:

    The quality of the microspheres that were produced, as seen the the attached SEM micrograph.

    How the process variables did not affect the zeta potential of the microspheres produced (Table 4 below), and how the size can be varied by varying the concentrations of Chitosan or the Molecular weight (MW). Continue reading “Chitosan microspheres prepared by spray drying” »