Abstract
Hydroxyapatite-pulp composite fiber (HAPC) which has the structure of wood pulp fiber coated by hydroxyapatite (HAp) is referred to as HAp fiber. Tested pulps used in this investigation are commercially available soft wood breached kraft pulp (N-BKP) and hard wood breached kraft pulp (L-BKP). Preparing HAPC as starting materials, new type HAp sheet (25×25cm2, basis weight 75-100g/m2, HAp20∼40weight%) was relatively easily developed with paper making technique using tetragon type hand-sheet machine. HAp sheet has white color surface looked like commercial filter paper and high affinity to biomolecules, because the sheet surface is completely covered by HAp powders. This new sheet making technique using HAPC is simpler and cut down the price in comparison with conventional technique for making inorganic filler paper with the retention aids. HAp sheet has similar mechanical strength to commercial filter paper 51B and is easy to manipulate. HAp 36.8weight% sheet LP-2 adsorbed BSA 13mg/(g of sheet) or salmon sperm DNA 4.6mg/(g of sheet).
