以粘胶纤维为原料、氢氧化钠为催化剂、氯乙酸钠为改性试剂，制备了阴离子改性粘胶纤维。采用高压反应釜，在140℃水热环境下用超支化聚乙烯亚胺（HPEI）为大分子改性试剂，制备了HPEI接枝改性的两性粘胶纤维。以两性粘胶纤维为模板、氯金酸为金源、硼氢化钠为还原剂，制备了纳米金（AuNPs）负载两性粘胶纤维。利用IR、SEM、XPS对产品进行表征。结果表明，两性粘胶纤维制备成功，反应主要发生在纤维表面，纤维结构未发生改变；纳米金负载两性粘胶纤维表面氮元素和金元素明显增加。以纳米金负载两性粘胶纤维为催化剂，硼氢化钠还原对硝基苯酚溶液（6×10^-2 mol/L）的降解率可达到99.97%，硼氢化钠还原次甲基蓝溶液（8×10^-5 mol/L）的降解率可达到96.60%，同时可以加快降解速度。

Anionic modified viscose fiber is prepared from viscose fiber with sodium hydroxide as catalyst and sodium chloroacetate as modification reagent.Hyperbranched polyethylenimine (HPEI) grafted amphoteric viscose fibers are prepared from anionic viscose fiber by using HPEI as macromolecular modification reagent under a 140℃ hydrothermal environment in a high-pressure reactor.Nano gold (AuNPs) loaded amphoteric viscose fiber is prepared with HPEI grafted amphoteric viscose fiber as template,chlorauric acid as gold source and sodium borohydride as reducing agent.The products are characterized by IR,SEM and XPS.IR and SEM analysis shows that AuNPs loaded amphoteric viscose fiber is successfully prepared,and the reaction occurs mainly on the surface of the fiber while the fiber structure remains unchanged.XPS analysis shows that nitrogen and gold elements on the surface of AuNPs loaded amphoteric viscose fiber increase significantly.With AuNPs loaded amphoteric viscose fiber as catalyst,the reduction degradation rate of p-nitrophenol solution (6×10^-2 mol·L^-1) by sodium borohydride reaches 99.97% while the reduction degradation rate of methylene blue solution (8×10^-5 mol·L^-1) can reach 96.60% with an accelerated degradation reaction.