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新颁全日制中学《化学教学大纲》,对“纤维素的用途——造纸、制造粘液丝、纤维素硝酸酯、纤维素醋酸酯”做了具体要求,但课本有关这部分的内容却比较抽象。为此,我们增加了纤维素乙酸酯抽丝实验,用以示意纤维素的抽丝加工过程。 [仪器及药品] 50毫升注射器一支(不要针头) 长方形水槽一个(内装一个玻璃棒) 将纤维素乙酸酯溶于丙酮,体积比为1:6左右。 [操作] 1.将适量抽丝液倒入注射器内。 2.将抽丝液均匀垂直地从注射器内挤出,使丝
Newly awarded full-time secondary school “Chemistry Syllabus” made specific requirements for “use of cellulose - papermaking, making mucus, cellulose nitrate, cellulose acetate”, but the content of this part of the textbook is relatively abstract . For this purpose, we have increased cellulose acetate spinning experiments to illustrate the spinning process of cellulose. [Instruments and Drugs] 50 ml syringe (not needle) Rectangular sink (containing a glass rod) Dissolve cellulose acetate in acetone at a volume ratio of about 1:6. [Operation] 1. Pour the appropriate amount of spinning solution into the syringe. 2. Extrude the spinning solution from the syringe evenly and vertically to make the wire