纤维素黄化可用SO_3或ClSO_3H在对质子有惰性的均相体系中进行,以O—(CH_3)_3Si—纤维素作为中间产物,得到碱纤维素黄酸酯在水中可完全溶解并且链段降解很少,其黄化度DS_s≥0.25,DS_s在0.2～0.25之间可由硅化度DS_(Si)调节,也可由黄化剂种类及用量不同加以控制,同时也有纤维素黄酸盐AGU中酯基团的贡献。黄化一种方法是将分离的三甲基硅纤维素重新溶解到N.N—二甲基甲酰胺或四氢呋喃中进行黄化,或先从活化 Cellulose yellowing can be SO_3 or ClSO_3H in a proton-inert homogeneous system to O- (CH_3) _3Si-cellulose as an intermediate product, resulting in alkali cellulose xanthate ester can be completely dissolved in water and the segment of degradation Few, the degree of yellowing DS_s ≥ 0.25, DS_s between 0.2 ~ 0.25 can be adjusted by the degree of silicification DS_ (Si), but also by the type and amount of yellowing agent to be controlled, but also cellulose ester yellow ester AGU Mission’s contribution. One method of yellowing is to re-dissolve the isolated trimethylsilyl cellulose in N.N-dimethylformamide or tetrahydrofuran for yellowing, or to start with activation