Abstract :
[en] This work aims to optimize the texture properties of hydroxyapatite (HA) in view to adopt them as biopharmaceutical drug delivery carrier. For this purpose, cetrimonium bromide (CTAB) has been adopted as a nanotemplate. The micellization behavior of this cationic surfactant has been studied within conditions simulating HA
synthesis in order to better understand and control its aggregation behavior during HA synthesis. Micelle formation and their size have been monitored by dynamic light scattering (DLS) in the presence of phosphate ions,
adopting different CTAB concentrations. Interestingly, distinct populations of CTAB aggregates have been
distinguished in the autocorrelation curves derived from DLS analysis. The influence of CTAB aggregation during
HA synthesis has been assessed by comparing the purified inorganic powders by FTIR, XRD, TGA, BET and TEM
analysis. The evolution of the size and shape of HA nanoparticles visualized under TEM has been closely
correlated to the change in specific surface area, which has considerably increased (up to 150 m2
.g− 1
) in a
narrow range of CTAB concentration. Soybean trypsin inhibitor (STI) was adopted as a model of bone
morphogenic protein. Its loading capacity, release rate in vitro and its stability were correlated to the HA nanotexture.
Scopus citations®
without self-citations
10