Sonication for improved particle size distribution of core-shell particles

摘要

In one or more embodiments, a porous composite particulate material includes a plurality of composite particles including an acid-base-resistant core particle at least partially surrounded by one or more layers of acid-base-resistant shell particles. The shell particles are adhered to the core particle by a polymeric material. The shell particles and/or core particles may be made from an acid-base-resistant material that is stable in harsh chemical conditions. During application of the polymeric material/shell particle bilayer, the core particles are sonicated to homogenize the particle size distribution and minimize agglomeration of particles. Multiple bilayers of polymer/shell particles may be applied. In one embodiment, the core particle comprises generally spherical glassy carbon, while the shell particles may comprise nano-sized diamond particles. Other acid-base-resistant materials may be employed. The porous composite particulate materials may be used in separation technologies, including, but not limited to, chromatography and solid phase extraction.

主权项

1. A method for manufacturing a porous composite particulate material, comprising:
providing a plurality of acid-base-resistant core particles, wherein the plurality of acid-base-resistant core particles include carbon core particles; providing a plurality of acid-base-resistant shell particles, wherein the plurality of acid-base-resistant shell particles include at least one of graphitic carbon shell particles or diamond shell particles; applying sonic energy to the plurality of acid-base-resistant core particles; and after the act of applying sonic energy, applying at least one polymer material/shell particle bilayer including:
coating at least a portion of the plurality of acid-base-resistant core particles, at least a portion of the plurality of acid-base-resistant shell particles, or combinations thereof with at least one polymer material; andadhering a portion of the plurality of acid-base-resistant shell particles to at least some of the plurality of acid-base-resistant core particles with the at least one polymer material to form a plurality of composite particles.