Jang Jae-Hyuk, Hayashi Noriko, Han Song-Yi, Park Chan-Woo, Febrianto Fauzi, Lee Seung-Hwan, Kim Nam-Hun
Department of Forest Biomaterials and Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
Forestry and Forest Products Research Institute, Ibaraki 300-1244, Japan.
Polymers (Basel). 2020 Sep 25;12(10):2201. doi: 10.3390/polym12102201.
Changes in the dimensions of lignocellulose nanofibrils (LCNFs) with different lignin contents from betung bamboo () by enzymatic hydrolysis using endoglucanase (EG) were investigated. Lignin contents were adjusted from 3% to 27% by NaClO/acetic acid treatment, and LCNFs were prepared using a wet disk-mill (WDM). The dimensions of the LCNFs significantly decreased with decreasing lignin content and increasing EG addition. With increasing EG content, the average diameter of the LCNFs significantly decreased, even though they contained parts of hemicellulose and lignin. The crystal structure showed the typical cellulose I structure in all samples, but the intensity of the diffraction peak slightly changed depending on the lignin and EG contents. The crystallinity index (CrI) values of the LCNFs increased a maximum of 23.8% (LCNF-L27) under increasing EG addition, regardless of the lignin content. With the EG addition of three times the LCNF amount, LCNF-L3 showed the highest CrI value (59.1%). By controlling the composition and structure of LCNFs, it is expected that the wide range of properties of these materials can extend the property range available for existing materials.
研究了用内切葡聚糖酶（EG）对来自贝东竹（）不同木质素含量的木质纤维素纳米纤维（LCNF）进行酶解时其尺寸的变化。通过NaClO/乙酸处理将木质素含量从3%调整到27%，并使用湿盘磨（WDM）制备LCNF。随着木质素含量的降低和EG添加量的增加，LCNF的尺寸显著减小。随着EG含量的增加，LCNF的平均直径显著减小，尽管它们含有部分半纤维素和木质素。晶体结构在所有样品中均显示出典型的纤维素I结构，但衍射峰的强度根据木质素和EG含量略有变化。无论木质素含量如何，在增加EG添加量的情况下，LCNF的结晶度指数（CrI）值最大增加23.8%（LCNF-L27）。当EG添加量为LCNF量的三倍时，LCNF-L3显示出最高的CrI值（59.1%）。通过控制LCNF的组成和结构，预计这些材料的广泛性能可以扩展现有材料的性能范围。
