碱纤维素

本文研究了药物缓释材料HPMC的合成方法，探讨了碱纤维素制备，醚化剂浓度，混合醚化剂配经以及产品后处理对高粘度HPMC的影响。

The high viscosity HPMC was prepared as the supplements of medicine . The factors of synthesis , for example alkali cellulose , concentration and ratio of the mixed etherifying agents , and product aftertreatment were studied .

碱纤维素再经二硫化碳处理制成纤维素黄酸酯。

The alkali cellulose is then treated with carbon disulfide to form cellulose xanthate .

纤维素Ⅱ和碱纤维素Ⅱ单结晶的研究

Study on the single crystals of cellulose ⅱ and na-cellulose ⅱ

乙醇中碱纤维素的结构变化

The Structure Transformation of Alkaline Cellulose in Ethanol

粘胶的生产过程包括纤维素与氢氧化钠反应形成碱纤维素的过程。

Viscose manufacturing process involves the reaction of cellulose with sodium hydroxide to form an alkali cellulose .

碱溶性半纤维素最佳提取工艺参数为，料液比为1∶10、4h、25℃、碱液浓度为1.0N。

For alkaline-hemicellulose extraction , the parameters were as follows : meal-solvent ratio 1 ∶ 10 , extraction time 4 hours , temperature 25 ℃, alkaline concentration 1.0 N.

在此工艺条件下，碱溶性半纤维素提取率为9.47%。

The yield of alkaline-hemicellulose under the conditions was 9.47 % .

以工业脱脂米糠为原料提取米糠水溶性半纤维素及碱溶性半纤维素，是米糠综合利用的又一有效途径。

It is valuable to extract water-hemicellulose and alkaline-hemicellulose from defatted rice bran .

在上述工艺条件下，水溶性半纤维素和碱溶性半纤维素的提取率分别为1.43%和9.02%。

With the optimum parameters , the extraction rates were 1.43 % and 9.02 % for water-soluble hemicellulose and alkaline-soluble hemicellulose respectively .

碱溶性羟乙基纤维素是纤维素的一种低醚化度的醚化产物，采用气固相的反应方法可以得到碱溶性良好、醚化度均一的羟乙基纤维素。

Alkali-soluble hydroxyethyl cellulose ( HEC ), one of cellulose derivatives with lower etherification degree , could be made by the gas-solid reaction of cellulose and ethylene oxide .

以废棉和木屑为原料，在18%的碱及系列助剂作用下水解成碱纤维素。

The alkali cellulose was obtained by treatment of waste cotton , cotton linters or wood scraps for 10 min at 25 ℃ with twice their weight of NaOH as a 18 % solution .