中文摘要：

以芦苇浆为原料，采用超声辅助硫酸水解法制备了纳米纤维素。在单因素实验的基础上，响应面法优化纳米纤维素制备工艺条件，结果表明最佳制备工艺条件为超声时间32min，硫酸浓度52％，反应温度54℃，纳米纤维素得率最高（78．67％）；通过傅里叶变换红外（FTIR）、X射线衍射和透射电子显微镜（TEM）对最佳工艺条件制备的纳米纤维素进行性能表征，分析表明最佳工艺条件制备的纳米纤维素聚集态结构为纤维素I型，呈棒状。

英文摘要：

Nanocrystalline cellulose （NCC） was prepared from reed pulp by the method of sulfuric acid hydrolysis with ultrasonic pretreatment. Based on the results of the single - factor experiment, the preparation condition of NCC was optimized via response surface methodology. The results show that the best conditions are 32 min of ultrasonic time, 52% of sulfuric acid concentration and 54~C of reaction temperature. Under these conditions, the yield of NCC was the highest （78.67%）. The NCC with optimized condition was characterized by using fourier transform infrared （FTIR） , X - ray diffraction and transmis- sion electron microscopy （ TEM）, and it is analyzed that the aggregation state structure of NCC with optimized condition was cellulose type I, which is rod -like morphology.