在离子液体 [bmim]Br 中合成纤维素脱氢枞酸酯。

Synthesis of cellulose dehydroabietate in ionic liquid [bmim]Br.

机构信息

Guangxi University, Nanning, Guangxi 530004, People's Republic of China.

出版信息

Carbohydr Res. 2011 Sep 27;346(13):2024-7. doi: 10.1016/j.carres.2011.06.011. Epub 2011 Jun 16.

DOI:10.1016/j.carres.2011.06.011

Abstract

A new type of cellulose derivative, cellulose dehydroabietate (CDA), was synthesized by the O-acylation reaction of cellulose with dehydroabietic acid chloride (DHAC) using ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br) as a solvent and 4-dimethyl-aminopyridine (DMAP) as a catalyst. The resulting CDA was characterized by means of FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), and elemental analysis. Also, some properties of CDA were determined. These results showed that CDA has better solubility, water-repellency, and resistance to acids and bases than raw cellulose, and these properties increase with the DS of CDA.

摘要

一种新型的纤维素衍生物——脱氢枞酸纤维素（CDA），通过纤维素与脱氢枞酸氯（DHAC）的 O-酰化反应，以离子液体 1-丁基-3-甲基咪唑溴化物（[bmim]Br）为溶剂，4-二甲基氨基吡啶（DMAP）为催化剂合成。通过傅里叶变换红外光谱（FT-IR）、X 射线衍射（XRD）、扫描电子显微镜（SEM）、热重分析（TGA）和元素分析对所得 CDA 进行了表征。同时，还测定了 CDA 的一些性能。结果表明，与原纤维素相比，CDA 具有更好的溶解性、拒水性、耐酸碱性，且随着 CDA 的取代度（DS）增加，这些性能也随之提高。