An Eco-friendly Degumming of Apocynum Venetum with Ionic Liquid Pretreatment

ABSTRACT

A novel pretreatment process for degumming of apocynum venetum is developed firstly using 1-butyl-3-methylimidazolium acetate-water mixtures. The effect of the four independent parameters on the residue of gum of apocynum venetum fibers was investigated. The results showed that the effect of 1-butyl-3-methylimidazolium acetate concentration on the residue of gum is the most significant, followed by time, temperature, and liquor ratio. The optimal solution of ionic liquid pretreatment for the degumming of apocynum venetum fiber is obtained with a concentration of ionic liquid 80%, liquor ratio 1:20, temperature 90°C, and time 4 h. The residual gum contents for the chemical degummed apocynum venetum fibers were 3.90% with ionic liquid pretreatment. Moreover, the physicochemical properties of the degummed apocynum venetum fibers were also characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and Scanning electron spectroscopy (SEM).

摘要

首次采用1-丁基-3-甲基咪唑醋酸酯水溶液对罗布麻进行脱胶前处理.研究了四个独立参数对罗布麻纤维胶渣的影响.结果表明，醋酸1-丁基-3-甲基咪唑浓度对胶渣影响最大，其次是时间、温度和液比.以离子液体浓度为80%、液比为1:20、温度为90°C、时间为4h的离子液体预处理方法对罗布麻纤维脱胶进行了优化.离子液体预处理的化学脱胶麻纤维残胶率为3.90%.此外，还利用傅立叶变换红外光谱（FT-IR）、X射线衍射（XRD）和扫描电子光谱（SEM）等手段对脱胶后的罗布麻纤维的理化性质进行了表征.

KEYWORDS:

• Apocynum venetum
• fiber
• pretreatment
• degumming
• ionic liquid
• physicochemical property

关键词:

• 预处理
• 脱胶
• 离子液体
• 理化性质