离子液体萃取分离废弃涤/棉混纺材料的基础研究

项目名称： 离子液体萃取分离废弃涤/棉混纺材料的基础研究

项目编号： No.51203125

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 有机高分子材料学科

项目作者： 李明

作者单位： 武汉纺织大学

项目金额： 25万元

中文摘要： 涤/棉混纺是消费量巨大的的纺织材料，每年都有大量废弃物产生，因难以将涤纶和棉分离，无法回收再利用。为了探索解决分离涤/棉混纺,同时回收涤纶和棉的问题，本项目提出采用绿色溶剂-离子液体萃取涤/棉混纺中的棉纤维素，实现涤/棉的高效分离,回收涤纶与再生纤维素。鉴于涤纶(PET)在离子液体中长时间高温处理存在的降解可能性，项目主要研究离子液体的阳离子结构、阴离子种类、酸碱性等因素与涤纶降解行为之间的相互关系，探索反应条件、工艺对PET降解的影响规律，研究PET降解的动力学过程，结合降解产物的组成与结构分析，揭示离子液体与混纺材料中的PET相互作用的机理。在此基础上，探索如何控制合适的萃取条件，抑制涤纶在离子液体中的降解性。研究涤/棉混纺材料在离子液体中的萃取、分离与再生规律，并优化其工艺条件，建立一条绿色、无污染低耗能回收再利用涤/棉的方法，实现混纺织物的资源化再利用。

中文关键词： 纺织废弃物；涤棉混纺；离子液体；萃取；降解

英文摘要： Polyester/cotton blend fibers are a kind of textile materials with huge consumption. There are a large number of waste textiles generated every year, which can't be recycled because of difficultly separation of polyester and cotton. In order to explore a solutions to separate the polyester/cotton blend fibers, and recycle polyester and cotton at the same time, in this project the ionic liquids will be used to extract the cellulose from polyester/cotton blends, to achieve efficiently separation of the polyester/cotton. In view of degration possibility of the polyester (PET) in the ionic liquids for prolonged treatment at high temperature, We will synthesis and pick up a series of imidazole ionic liquids with different anionic, which can only dissolute cellulose. The optimum conditions of extraction and separation of polyester/cotton are also explored. The relationship between polyester degradation behavior in ionic liquids and the factors will be studied, such as the substituent structure and anions, pH value of ionic liquids. We will aslo explore the reaction conditions, the process impact of the PET degradation,and the dynamic process of PET degradation. Combined with of composition and structure analysis of the degradation products, we try to reveal the interaction mechanism between the ionic liquids and PET

英文关键词： Textile waste；Polyester/cotton blend fibers；Ionic liquids；Extraction；Degradation