Excessive bilirubin in human blood can cause irreversible
damage
to the patient’s brain and nervous system. Herein, chitin/MXene
(Ch/MX) composite aerogel spheres were designed by supercritical CO2 technology to remove bilirubin safely, quickly, and efficiently.
In this study, Ti3C2 with 4 nm thickness was
uniformly dispersed in the chitin fibers as a monolayer nanofiller
and tightly connected with the chitin fibers, which significantly
improved the mechanical strength and adsorption capacity of the aerogel
spheres. The Ch/MX aerogel spheres could withstand 25,000 times their
own weight. Compared with chitin aerogel spheres, the equilibrium
time for bilirubin adsorption by Ch/MX aerogel spheres was shortened
by 33% and the adsorption capacity was increased by 40%. In addition,
Ch/MX aerogel spheres still possess a high adsorption capacity of
142.86 mg/g in bilirubin solution with BSA protein up to 80 mg/mL.
Compared with commercial products used clinically, Ch/MX has the advantages
of high adsorption capacity and high interference resistance. Compared
with our previous chitinous/graphene aerogel spheres, Ch/MX has the
advantages of low dosage of functional materials, high bilirubin adsorption
rate, and good biocompatibility. This study demonstrates the advantages
of MXene as a nanofiller for adsorbing bilirubin and promotes the
development and application of inorganic 2D nanomaterials in the clinical
treatment of hyperbilirubinemia.