摘要
利用1-烯丙基-3-甲基咪唑氯盐([AMIM]Cl)离子液体预处理废弃棉织物,再经纤维素酶水解.通过偏振光显微镜观察棉纤维的溶解过程,采用扫描电镜、X射线衍射和傅里叶变换红外光谱表征棉织物处理前后的形貌和结构.结果表明,[AMIM]Cl处理棉织物的最佳温度和时间是110℃和90min.此条件下,[AMIM]Cl对棉织物纤维素的溶解为物理溶解,处理后纤维素的晶型由Ⅰ型转为Ⅱ型,结晶度比未处理时降低了57%.再生纤维素酶解48h后还原糖得率达96%,约为未处理的6倍.
Pretreatment of cotton-based waste textiles by ionic liquid 1-allyl-3-methylimidazolium chloride （[AMIM]CI） and enzymatic hydrolysis with cellulose were studied. The dissolution process of cotton fabrics was inspected by polarizing microscopy and the changes in the morphology and structures of cotton fiber and regenerated cellulose after pretreatment were characterized by scanning electron microscopy, X-ray diffraction and Fourier transform infrared spectrometry. The results showed that the optimal condition for pretreatment cotton fabrics was 110 ℃ and 90 min. The dissolution of fabrics by [AMIM]CI was a physical process. Under this condition, the morphology of cotton fiber disappeared and the cotton cellulose was transformed completely from cellulose I to cellulose Ⅱ after dissolution and regeneration, and the crystallinity of the cotton cellulose was reduced by 57% as compared to the untreated one. Enzymatic hydrolysis indicated that the ionic liquid-pretreated cotton fabric exhibited a higher hydrolytic efficiency and the conversion of reducing sugars reached 96% after 48 h, which was 6- times larger than that of untreated one.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第2期210-214,共5页
Journal of Donghua University(Natural Science)
基金
教育部新世纪优秀人才支持计划资助项目(NCET-12-0828)
上海市科委国际合作资助项目(11230700600)
中央高校基本科研业务费专项资金资助项目
