碱性水解法分离废弃涤棉混纺织物工艺研究  

Separation of polyester-cotton blended fabric waste by alkaline hydrolysis

作　　者：刘红茹[1,2] 陈昀[1,2] 张丽平[1,2] 

机构地区：[1]北京服装学院材料科学与工程学院,北京100029 [2]北京市服装材料研究开发与评价重点实验室,北京100029

出　　处：《合成纤维工业》2014年第5期19-22,共4页China Synthetic Fiber Industry

基　　金：北京服装学院北京市服装材料研究开发与评价重点实验室资助项目(2012ZK-04)

摘　　要：采用常压条件碱性水解涤纶的方法分离废弃涤棉混纺织物中的涤纶与棉纤维,研究了水解时间、水解温度、固/液比、氢氧化钠溶液浓度等因素对涤纶水解反应过程的影响,并对水解分离后的产物结构进行了表征。结果表明:碱性水解法可以有效地分离废弃涤棉混纺织物中的涤纶和棉纤维,水解分离得到的棉纤维、对苯二甲酸、乙二醇均可再利用;水解最佳工艺条件为氢氧化钠质量分数2%,水解温度90℃,固/液比为5 g试样/200 mL氢氧化钠溶液,水解时间为2 h。The alkaline hydrolysis under normal pressure was applied to separate polyester fiber and cotton fiber in polyestercotton blended fabric waste. The effects of hydrolysis time and temperature, solid/liquid ratio and sodium hydroxide solution concentration on the hydrolysis process of polyester fiber were studied. The structure of the hydrolysis separation products was characterized. The results showed that alkaline hydrolysis was an efficient way to separate polyester fiber and cotton fiber in the blend fabrics, and the reusable cotton fiber, terephthalic acid and glycol can be obtained; and the alkaline hydrolysis conditions were optimized as followed： 2% sodium hydroxide by mass fraction, hydrolysis temperature 90 ~C and time 2 h, solid/liquid ratio of 5 g sample per 200 mL sodium hydroxide solution.

关 键 词：聚对苯二甲酸乙二醇酯纤维 废弃涤棉混纺织物 氢氧化钠 碱性水解 分离 回收 

分 类 号：TQ342.21[化学工程—化纤工业]