Preparation method of calcium carbonate whiskers with concave and convex surface morphology

The invention discloses a preparation method of calcium carbonate whiskers with concave and convex surface morphology. The method is characterized in that organic calcium is used as a calcium source, organic magnesium is a crystal regulating agent, and chitosan is used as a template agent; the mole ratio of calcium ions in the organic calcium to magnesium ions in the organic magnesium is regulated and controlled; meanwhile, carbon dioxide atmosphere is provided through natural decomposition of ammonium carbonate under the sealing condition, so that aragonite type calcium carbonate whiskers (the length diameter ratio is 2 to 20) with regular morphology, the length being 1 to 3mum and the radial length being 0.15 to 0.6mum are obtained. The method has the advantages that the organic calcium and the organic magnesium are used as raw materials; the C1- introduced by common inorganic salts (CaCl2 and MgCl2) is avoided; the purity of the calcium carbonate whisker product is effectively ensured. The surface of the c