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精制棉的膨润预处理对硝化棉氮量及 分布均匀性的影响

Keywords: 硝化棉,含氮量,氮量分布均匀性,膨润

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Abstract:

采用北京理工大学研发的硝化棉(NC)含氮量及其分布均匀性测试仪,考察了膨润时间、温度、膨润剂浓度和种类对精制棉膨润效果以及以此为原料制备的NC含氮量及其分布均匀性的影响规律.结果表明:在所研究的范围内,最佳的膨润时间为1.0h,膨润剂的质量分数为8%,膨润效果按照递减顺序排列为:硝酸钾>尿素>乙酸钠>水杨酸钠>硫脲,间苯二酚;低温条件有利于精制棉的膨润.精制棉的膨润程度越高,NC的氮量分布越均匀.

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