Abstract
Spherical porous hydroxyapatite was synthesized by a wet method using a simulated body fluid. The grain size
is about 1 - 5 μm, the center part is dense, but there are plate - like crystals of about 0.1 - 0.5 μm overlapping on
the surface, and there is a gap of about 0.4 μm at the maximum therebetween . We evaluated the oil adsorption
ability and light reflection properties of spherical porous hydroxyapatite and investigated further possibilities
of application as pharmaceuticals and cosmetics. When tri (caprylic / capric acid) glyceryl, sugar squalane and
oleic acid were investigated, the adsorption amount of fat was almost the same as that of commercially available
apatite. It is thought that oils are held mainly in the gaps of plate crystals. Light reflection in the near infrared
region is about 60% higher than that of particulate apatite produced by the same manufacturing method, and it
can be expected to be applied as biomaterials and cosmetic materials for protecting the skin from near infrared
rays. Furthermore, since spherical porous hydroxyapatite can also carry functional particles in gaps or the like
of plate crystals, further possibility is suggested as a multifunctional material.
