4Prafulla K Sahoo,Pradeep K Rana. Synthesis and biodegradability of starch-g-ethyl methaerylate/sodium acrylate/sodium silicate superabsorbing eomposite[J]. J Mater Sci, 2006,41 (19) : 6470-6475.
5Fang Li,Zhao Ying,Tan Tian Wei. Preparation and water absorbent behavior of superabsorbent polyaspartic acid resin[J].Journal of Polymer Research, 2006,13(2) : 145-152.