Effect of lignin on the thermal properties of nanocrystalline prepared from kenaf core

The Wood and Biofiber International Conference 2017

轻工业生物科学

Sabaruddin, F.A.^1 ; Paridah, M.T.^1

Institute of Tropical Forestry and Forest Products, Universiti Putra Malaysia, Seri Kembangan, Selangor

43400, Malaysia^1

关键词: Anthraquinone (aq);    Bleaching sequence;    Chain networks;    Degradation process;    Lignin contents;    Nanocrystallines;    Primary loads;    Structural function;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/368/1/012039/pdf
DOI  :  10.1088/1757-899X/368/1/012039

学科分类：生物科学（综合）

来源: IOP

【 摘 要 】

Lignin and cellulose work together to provide a structural function in plants. While cellulose is the primary load-bearing element, lignin acts as the matrix that provides stiffness and rigidity to the fibre. In the production of nanocellulose, the removal of lignin is essential which is done through bleaching. Nevertheless, studies have shown that lignin can impart positive effects on thermal stability besides being a natural compatibilizer due to the presence of both aliphatic and polar groups in the chain network. The objective of this study is to evaluate the effect of lignin on the thermal properties of nanocrystalline cellulose prepared from kenaf core. Nanocellulose of different lignin content was prepared by undergoing first, pulping using 20 % NaOH and 0.1 % anthraquinone (AQ) followed by a bleaching sequence. The study shows that, sample having the least amount of lignin had good thermal stability during the first and second stage of decomposition by shifting the temperature higher as compared to sample with higher lignin content. However, when the temperature reached more than 300 °C up to the end of the degradation process, the latter gave a higher amount of residue suggesting that lignin can help the NCC to withstand heat better.