Investigation of the Structural, Thermal, and Physicochemical Properties of Nanocelluloses Extracted From Bamboo Shoot Processing Byproducts

Tong Lin; Qi Wang; Xuan Zheng; Yu Chang; Hui Cao; Yafeng Zheng

doi:10.3389/fchem.2022.922437

Investigation of the Structural, Thermal, and Physicochemical Properties of Nanocelluloses Extracted From Bamboo Shoot Processing Byproducts

Front Chem. 2022 Jun 14:10:922437. doi: 10.3389/fchem.2022.922437. eCollection 2022.

Authors

Tong Lin¹, Qi Wang^{2

3}, Xuan Zheng¹, Yu Chang¹, Hui Cao^{4

5}, Yafeng Zheng^{1

2}

Affiliations

¹ College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, China.
² Institute of Agricultural Engineering, Fujian Academy of Agriculture Sciences, Fuzhou, China.
³ Fujian Key Laboratory of Agricultural Product (Food) Processing, Fuzhou, China.
⁴ Institute of Chinese Medical Sciences, University of Macau, Macau SAR, China.
⁵ Faculty of Food Science and Technology, University of Vigo, Pontevedra, Spain.

Abstract

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 (Leleba oldhami 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.

Keywords: acid hydrolysis; bamboo shoot; nanocrystalline cellulose; nanofibrillated cellulose; physicochemical property.