离子液体溶解法分离废弃涤棉混纺织物

Components separation of waste polyester-cotton blended textile with ionic liquid dissolving method

采用离子液体[BMIM]Cl溶解法分离废弃涤棉混纺织物中的涤纶与棉纤维。研究预处理、溶解温度、固液比、溶解时间等因素对溶解过程的影响,并对溶解前后纱线的结构及性能进行表征。结果表明,该方法可有效地分离棉纤维含量较低的废弃涤棉混纺织物,溶解的棉纤维可变成固态纤维素,残留的纱线为涤纶纤维,其性能没有显著变化。适宜的溶解工艺参数:常温下清水浸泡纱线72 h,溶解温度为130～135℃,固液比为1～1.1 g涤棉∶50 g离子液体,溶解时间为4 h。

Ionic liquid [ BMIM ] Cl was used to separate polyester and cotton from waste polyester-cotton blended textile. The influences of pretreatment, dissolving temperature and time, solid-liquid ratio, etc. on the dissolving process were studied, along with characterization of the structure and properties of the yarns before and after dissolution. The results showed that this method can effectively separate waste polyester-cotton blended textile with lower cotton content. The dissolved cotton can be turned to solid cellulose. The residual yarn was polyester whose performance has no significant change. The suitable dissolving process parameters were： immersing the temperature 130 ~ 135 ℃, solid-liquid ratio dissolving time 4 h. yarns 72 h in water at room temperature, dissolving 1.1 g polyester-cotton： 50 g ionic liquids, and Key words waste polyester-cotton blended textile; components separation; ionic liquid; cotton fiber dissolution