Lin Tong, Wang Qi, Zheng Xuan, Chang Yu, Cao Hui, Zheng Yafeng
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China.
Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou, China.
Front Chem. 2022 Jun 14;10:922437. doi: 10.3389/fchem.2022.922437. eCollection 2022.
Nanocellulose has gained increasing interest due to its excellent properties and great potential as a functional component or carrier in food and pharmaceutical industries. This study investigated the structural, thermal, and physicochemical properties of nanofibrillated cellulose (NFC) and nanocrystalline cellulose (CNC) extracted from bamboo shoot ( Nakal) processing byproducts. NFCs were prepared through low concentration acid hydrolysis combined with ultrasonic treatment. CNCs were further isolated from NFCs using sulfuric acid hydrolysis treatment. TEM images showed that NFC and CNC exhibited typical long-chain and needle-like structures, respectively. CNC suspension was stable due to its zeta potential of -34.3 ± 1.23 mV. As expected, both NFC and CNC displayed high crystallinity indexes of 68.51 and 78.87%, and FTIR analysis confirmed the successful removal of lignin and hemicellulose during the treatments. However, the thermogravimetric analysis indicated that sulfuric acid hydrolysis decreased the thermal stability of CNCs. The improved physicochemical properties of NFC and CNC suggested their potential in various applications.
由于纳米纤维素具有优异的性能以及在食品和制药行业作为功能成分或载体的巨大潜力，其受到了越来越多的关注。本研究调查了从竹笋（Nakal）加工副产品中提取的纳米纤丝化纤维素（NFC）和纳米晶纤维素（CNC）的结构、热性能和物理化学性质。NFC通过低浓度酸水解结合超声处理制备。CNC通过硫酸水解处理从NFC中进一步分离得到。透射电子显微镜图像显示，NFC和CNC分别呈现典型的长链状和针状结构。CNC悬浮液因其-34.3±1.23 mV的zeta电位而稳定。正如预期的那样，NFC和CNC均显示出68.51%和78.87%的高结晶度指数，傅里叶变换红外光谱分析证实了处理过程中木质素和半纤维素的成功去除。然而，热重分析表明硫酸水解降低了CNC的热稳定性。NFC和CNC改善的物理化学性质表明它们在各种应用中具有潜力。
