Evaluation of vibrated fluidized bed techniques in coating hemosorbents

Area of Science:

• Biomaterials Science
• Chemical Engineering
• Medical Device Technology

Background:

• Hemoperfusion requires effective sorbent materials for blood purification.
• Uniform and adherent coatings are crucial for hemoperfusion sorbent performance.
• Existing coating methods may have limitations in uniformity and adherence.

Purpose of the Study:

• To evaluate a vibrated fluidized bed (VFB) technique for applying ultrathin cellulose nitrate (CN) coatings.
• To assess the in vitro characteristics of CN-coated activated charcoal for hemoperfusion.
• To determine the suitability of VFB-applied CN coatings as hemosorbent coatings.

Main Methods:

• Utilized a vibrated fluidized bed (VFB) technique.
• Applied an ultrathin (2 microns) cellulose nitrate (CN) coating to synthetic bead activated charcoal.
• Evaluated in vitro characteristics: permeability to small and middle molecules, and mechanical integrity.

Main Results:

• The VFB-applied CN coating was highly uniform.
• The CN coating demonstrated tight adherence to the activated charcoal beads.
• Initial tests indicate suitability for hemoperfusion applications.

Conclusions:

• The vibrated fluidized bed (VFB) technique is effective for applying uniform and adherent cellulose nitrate (CN) coatings.
• CN-coated activated charcoal warrants further investigation as a hemosorbent material.
• This coating method shows potential for advancing hemoperfusion technology.