College of Environmental Science and Engineering, Nankai University, Tianjin 300071, PR China.
Carbohydr Polym. 2013 Oct 15;98(1):412-20. doi: 10.1016/j.carbpol.2013.06.030. Epub 2013 Jun 27.
In this study, 1-allyl-3-methylimidazolium chloride (AMIMCl), an ionic liquid, was synthesized and characterized by a series of test methods. Pretreatment of Zoysia japonica by ammonia fiber expansion (AFEX) was shown to reduce significantly the mass of hemicellulose and lignin in biomass, thereby breaking the lignocellulosic structure. Z. japonica samples pretreated with AFEX showed reasonable solubility in AMIMCl upon ultrasonic treatment. The rate of cellulose regeneration from Z. japonica samples pretreated with AFEX increased with increase in applied power of ultrasonication within a certain power range from 0 to 110 W. The regeneration rate of cellulose from AFEX-pretreated Z. japonica reached a maximum of 97% when the ultrasonic power was 110 W. Fourier transform infrared spectroscopy and nuclear magnetic resonance analyses indicated that the regenerated cellulose was similar to microcrystalline cellulose.
在这项研究中，合成了 1-烯丙基-3-甲基咪唑氯化物（AMIMCl）离子液体，并通过一系列测试方法对其进行了表征。氨纤维膨胀（AFEX）预处理证明，能显著降低生物量中半纤维素和木质素的质量，从而打破木质纤维素结构。经过 AFEX 预处理的样品在超声处理下，在 AMIMCl 中有较好的溶解性。在 0 至 110 W 的一定功率范围内，随着超声功率的增加，从经过 AFEX 预处理的样品中再生纤维素的速率增加。当超声功率为 110 W 时，AFEX 预处理的 Z. japonica 再生纤维素的速率达到最大值 97%。傅里叶变换红外光谱和核磁共振分析表明，再生纤维素与微晶纤维素相似。
