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研究纤维素氨基甲酸酯(CC)溶液的制备工艺及其稳定性。结果表明:在-5~5℃条件下,用聚合度为350~632的纤维素浆粕合成含氮量为2.34%~3.56%的CC能很好地溶解在质量浓度为2.25~3.0 mol/L的氢氧化钠溶液中,形成淡黄色透明溶液。该溶液经过渗透处理,不仅实现了纺丝液中CC与NaOH质量比≥1的要求,且溶液的黏性、稳定性都有所提高,可直接用于纺丝。通过研究发现,尿素、氯化铝及氯化锌在一定范围内对CC有助溶作用。
The preparation of cellulose carbamate (CC) solution and its stability were studied. The results showed that CC from 2.34% to 3.56% with cellulose pulp with polymerization degree of 350-632 at -5 ~ 5 ℃ could be well dissolved in the mass concentration of 2.25-3.0 mol / L sodium hydroxide solution to form a pale yellow transparent solution. After the solution is infiltrated, the mass ratio of CC to NaOH in the spinning solution is not less than 1, and the viscosity and stability of the solution are improved and can be directly used for spinning. Through the study found that urea, aluminum chloride and zinc chloride within a certain range of CC has a solubilizing effect.