Polyacrylamide(PAM) was used to modify the surface of hemihydrate calcium sulfate(CaSO4·0.5 H_2O) whiskers and to improve the morphology stability of whiskers in aqueous solution.The stabilized whiskers were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD) and infrared spectrum(FT-IR),et al.The results showed that the addition of PAM(mass fraction of CaSO4·0.5 H_2O) increasing from 0 to 2.0% prolonged the stabilization time of CaSO4·0.5 H_2O whiskers(slenderness ratio retention over...