论文总字数：15038字

摘 要

离子液体是一种新型的可再生的绿色溶剂，壳聚糖是一种储量丰富且可再生的天然高分子材料。开展对于壳聚糖在离子液体中的溶解、再生性能与流变性能研究，可以使其有效的应用于纺织、造纸、医药、化工等诸多领域。可以有效的提高我国的经济，提升国民的生活质量。

本论文探讨了壳聚糖在EmimAc离子液体中的溶解、再生性能以及稳态流变性能。研究结果显示：壳聚糖在EmimAc离子液体中的溶解性能随着温度的升高而有明显的升高，但是随着壳聚糖固含量的增加其溶解度却呈下降趋势。壳聚糖用甲醇再生的效率最高，但是再生的温度过高可能导致壳聚糖的降解，同时致壳聚糖的结晶程度大幅降低，这可能是由于被破坏的氢键和壳聚糖的原生结晶形式。纯的EmimAc离子液体呈牛顿性流体，随着壳聚糖的加入逐渐从牛顿性流体向假塑性流体转变。

关键词：壳聚糖; 溶解; 离子液体; 流变性; 再生

Study on the dissolution and rheological properties of chitosan in ionic liquid EmimAc

ABSTRACT

Ionic liquid is a new kind of renewable green solvent, and chitosan is a kind of natural polymer material with abundant reserves and renewable energy. The study on the dissolution, regeneration and rheological properties of chitosan in ionic liquids can be effectively used in many fields, such as textile, paper, medicine, chemical industry and so on. Can effectively improve the economy of our country, improve the quality of life of the people.

In this paper, the dissolution and regeneration performance of chitosan in EmimAc ionic liquid were studied. The results showed that the solubility of chitosan in EmimAc ionic liquid was significantly increased with the increase of temperature, but its solubility was decreased with the increase of the content of chitosan. Chitosan with methanol regeneration efficiency is the highest, but steady regeneration such as too high may lead to the degradation of chitosan, the regeneration temperature is too high cause significantly reduced the degree of crystallization of chitosan, which may is due to hydrogen bonding and chitosan was destroyed by the native crystalline form. The pure EmimAc ionic liquid was Newtonian fluid, and the transition from Newtonian fluid to pseudo plastic fluid was gradually increased with the addition of chitosan.

Keywords: Chitosan ; Dissolution; ionic liquid; Rheology ; Regeneration

目录

摘要...............................................................Ⅰ

ABSTRACT...........................................................Ⅱ

第一章 前言........................................................Ⅲ

1.1壳聚糖......................................................1

1.1.1 壳聚糖简介.............................................1

1.1.2壳聚糖与甲壳素的关系....................................1

1.1.3离子液体................................................1

1.2壳聚糖的溶解.................................................2

1.2.1溶解壳聚糖的传统方法....................................2

1.2.2咪唑类离子液体对壳聚糖的溶解...........................3

1.2.3其他离子液体对壳聚糖的溶解 .............................3

1.2.4离子液体溶解壳聚糖的原理................................4

1.3壳聚糖的再生.................................................4

1.4流变性.......................................................4

1.4.1稳态流变................................................5

1.5研究现状及意义...............................................5

1.6本文思路.....................................................5第二章壳聚糖在EmimAc液体中溶解与再生研究............................6

2.1引言........................................................6

2.2实验材料与仪器..............................................7

2.2.1实验原料................................................7

2.2.1实验仪器................................................7

2.3实验方法....................................................7

2.3.1EmimAc的合成............................................8

2.3.1壳聚糖的溶解............................................8

2.3.2壳聚糖的再生............................................8

2.4结果与讨论..................................................8

2.4.1不同固含量的壳聚糖在不同温度下的溶解情况................9

2.4.2 壳聚糖用甲醇，水，乙醇再生后的结果......................9

2.4.3 再生壳聚糖的红外光谱图..................................9

2.4.4 再生壳聚糖的XRD图.....................................10

1. 壳聚糖在EmimAc离子液体中的流变性............................12

3.1 引言.......................................................12

3.2 实验部分...................................................13

3.2.1实验材料与仪器.........................................13

3.3实验方法...................................................13

3.3.1EmimAc离子液体的制备...................................13

3.3.2稳态流变性的测量.......................................13

3.4实验结果与讨论.............................................14

1. 结果与展望...................................................17

4.1结论.......................................................17

4.2展望.......................................................17

参考文献...........................................................18

致谢...............................................................20

1. 前言

1.1 壳聚糖

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