To optimize the manufacture procedure for nanocrystalline cellulose ( NCC) that preparation and modification can be car-ried out simultaneously, bamboo pulp was milled into nanocellulose, and followed by being acetylated in mechanochemical method with 4-dimethylaminepyride (DMAP) as catalyst Four main factors, including milling time, reaction temperature and time, and ul-trasonic, were investigated via response surface methodology. Results showed that with milling time, reaction temperature, ultrasonic time and reaction time being 2 h, 120℃, 3 h and 5 h, respectively, A-NCC yield optimized at 42.76%, with substitution degree of bamboo pulp ranging from 0.125 to 0.214. Furthermore, X-ray diffraction and Fourier transform infrared spectroscopy analysis con-firmed that A-NCC manufactured in this approach contained characteristic functional groups of carbonyl and demonstrated high crys-tallinity.%以竹人纤浆为原料,4-二甲氨基吡啶(DMAP)为催化剂,采用机械力化学法制备纳米纤维素并同时进行乙酰化,探索一锅法制备乙酰化纳米纤维素(A-NCC)的较佳工艺,并应用响应面分析法对影响乙酰化纳米纤维素得率的4个主要因素进行优化.得到优化的较佳工艺条件为:球磨时间2 h、反应温度120℃、超声时间3 h、反应时间5 h,此时A-NCC的得率为42.76%.滴定法测得的A-NCC取代度在0.125~0.214之间,通过XRD和FTIR分析表明,机械力化学法制备得到的产物含特征官能团羰基,且结晶度较高.
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