月桂酸纤维素酯的酰化法制备及其成膜性能

纺织学报 ›› 2016, Vol. 37 ›› Issue (01): 11-15.

月桂酸纤维素酯的酰化法制备及其成膜性能

收稿日期:2014-11-15 修回日期:2015-09-19 出版日期:2016-01-15 发布日期:2016-01-14

Preparation and characterization of lauric acid cellulose ester and its film properties

Received:2014-11-15 Revised:2015-09-19 Online:2016-01-15 Published:2016-01-14

摘要/Abstract

摘要：

将棉浆粕纤维素溶解在离子液体（[Bmim]Cl）中获得纤维素/[Bmim]Cl均相溶液后，在4-二甲氨基吡啶的催化作用下，通过纤维素与月桂酰化反应制备了月桂酸纤维素酯（LACE）。采用FTIR、1H NMR、XRD、TG等手段对产物的结构及热稳定性能进行了表征；并选择具有不同取代度的LACE溶解在CHCl3中配成不同浓度的制膜液，采用延流法制膜，通过考察制膜条件与薄膜机械性能的关系，以及采用SEM分析薄膜形貌特征，研究了LACE的成膜性能。结果表明，当纤维素葡萄糖苷（AGU）: DMAP: LC=1: 0.03:3(摩尔比),在95℃下反应4h时，所得产物具有较高取代度，在非极性溶剂中溶解性能优良，且无需加入增塑剂就可模塑成型。

关键词: 月桂酸纤维素酯, 离子液体, 酰化法, 成膜性能

Abstract:

One kind of long-chain fatty acid cellulose ester of lauric acid cellulose esters (LACE) were prepared with lauroylchloride as acylating agent and4-Dimethylaminopyridine as catalyst in cellulose/[Bmim]Cl(1-butyl-3–methylimidazolium chloride) homogenous solution system via acylation method. The structure and thermal properties of the obtained LACE were characterized by means of FTIR, 1HNMR, XRD, TG, etc. The esterification conditions that affect substitution degree of products were investigated in detail. And the LACE film was also prepared via delay flow method using LACE membrane solution which were prepared by making LACE with different substitution degree dissolved in CHCl3.At the same time, the film properties were studied by investigating the relationship between the preparation conditions and mechanical properties of LACE film，scanning electron microscopy (SEM) was also used to characterize the film properties.The results showed that the LACE with higher degree of substitution(DS) could be prepared when the esterification carried out at 95℃for 4 h with mole ratios of cellulose glycosidase (AGU), 4-Dimethylaminopyridine (DMAP) and lauroyl chloride (LC) was 1:0.03:3. Meanwhile, the products showed good solubility performance in nonpolar solvent and excellent film properties without plasticizer.

Key words: lauric acid celluose ester, ionic liquid, acylation method, film property

徐素梅哈丽丹买买提米娜瓦尔乌买尔. 月桂酸纤维素酯的酰化法制备及其成膜性能[J]. 纺织学报, 2016, 37(01): 11-15.

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