米根霉细胞壁结构性多糖与丙烯酸接枝共聚反应研究

化学改性天然高分子絮凝剂是利用天然高分子物质进行化学改性而成的。与人工合成的有机高分子絮凝剂相比，它具有选择性大、无毒、价廉、易降解等优点，因此将会有广阔的应用前景，近几年，将乙烯基单体接枝到生物高分子上的工作引起了人们的兴趣，这种天然高分子与合成高分子的结合有可能得到理想的性能，获得新的材料：如生物降解塑料、絮凝剂、离子交换剂等，目前这方面的研究主要中在纤维素、淀粉和壳聚糖的接枝共聚上。

STUDY ON REGULARITIES OF GRAFT COPOLYMERIZATION OF ACRYLIC ACID ONTO FUNGAL CELL WALL

For the aim of getting macromolecular flocculant,we studied the copolymerization of acrylic acid onto Rhi.oryzae cell wall structural polysaccharide by the initiation of ceric ammonium nitrate.The effect of concentration of initiator and monomer,reaction temperature and reaction time on grafting percentage was investigated.To Rhi.oryzae cell wall structural polysaccharide the maximal grafting percentage of 135.5% was achieved at ［Ce+4］=5mmol/L,［AA］=1mol/L,T=60℃,t=3h.Then choosing organic dyes as the flocculated substances,by comparing with the chitosan,polyacrylamide and Rhi.oryzae cell wall structural polysaccharide before grafting,we studied the flocculent capability of Rhi.oryzae cell wall structural polysaccharide after grafting acrylic acid.The grafting product had excellent flocculent effect on basic and neutral dyes.