supported by the Key Program of the National Natural Science Foundation of China (Grant No. 50535050);the National Natural Science Foundation of China (Grant No. 50875252);the Program for New Century Excellent Talents in University (Grant No. NCET-06-0479);the Natural Science Foundation of Jiangsu Province (Grant No. BK2008005)
Poly(vinyl alcohol)/hydroxylapatite(PVA/HA)composite hydrogel was prepared by repeated freezing and thawing.The water loss properties of the resultant hydrogel were investigated by using optical microscope.Long time i...