芦苇浆纳米纤维素的制备及其尺寸均一性制备方法初探

采用硫酸水解芦苇浆和乙酸预处理芦苇浆制备纳米纤维素（NCC），并对NCC尺寸和形貌进行测定和分析，探究均一纳米纤维素的制备方法。结果表明芦苇浆NCC得率为61．50％，3次重复实验的乙酸预处理芦苇浆NCC得率分别为63．13％（NCC-1）、62．30％（NCC-2）和62．15％（NCC-3）；乙酸预处理芦苇浆NCC乙酸回收率分别为75．00％（NCC-1）、78．15％（NCC-2）和77．56％（NCC-3）。NCC尺寸分析表明芦苇浆NCC和3次重复实验的乙酸预处理芦苇浆NCC平均尺寸均有差异，其中只有乙酸预处理芦苇浆NCC-1尺寸分布较均匀，平均尺寸185．3nm。透射电子显微镜（TEM）下观察所制备的芦苇浆NCC和乙酸预处理芦苇浆NCC-1均呈棒状。

Preliminary Study on Preparation and Preparation Methods of Size Uniformity of Reed Pulp Nanocrystanine Cellulose

Nanocrystalline cellulose （NCC） was prepared from reed pulp with sulfuric acid hydrolysis and acetic acid to pretreat reed pulp. The size and morphology of NCC were determined and analyzed to explore the preparation methods of size uniformity NCC. The results show that the yield of reed pulp NCC was 61.50 % , and the yield of acetic acid to pretreat reed pulp NCC was 63.13 % （NCC-1）, 62.30 % （NCC-2） and 62.15 % （NCC-3） for three replicates, respectively. Acetic acid recovery rate of acetic acid pretreated reed pulp NCC was 75.00 % （ NCC-1 ）, 78. 15 % （ NCC-2 ） and 77.56 % （ NCC-3 ）, respectively. NCC size analysis shows that average size of reed pulp NCC and acetic acid to pretreat reed pulp NCC for the three replicates were different. Size distribution of acetic acid pretreated reed pulp NCC-1 was more uniform, and the average size of reed pulp NCC-1 pretreated with acetic acid was 185.3 nm. The morphology of reed pulp NCC and reed pulp NCC-1 with acetic acid pretreated were observed as rod-like with transmission electron microscopy （TEM）.