Comparison of the Characteristics of TEMPO-Oxidized Cellulose Nanofibers from Bamboo, Softwood and Hardwood Pulps
Bamboo, softwood, and hardwood bleached kraft pulp fibers were, respectively, used as the starting materials to isolate negatively charged nanofibrillated cellulose (TO-NFC) through the pre-treatment with the TEMPO/NaBr/NaClO oxidation system followed by a high-pressure homogenization.The physiochemical characteristics of transparent and highly viscous TO-NFC dispersions as well as physical properties of their resultant cellulose nanopapers were systematically compared.The maximum oxidation degree (with the content of-COONa-is 1.8 mmol/g) of TO-NFCs was achieved for the bamboo pulp.TEM micrographs revealed that each kind of pulps were disintegrated into cellulose nanofibrils with an average width of5～6 nm (as seen in Fig.1).But bamboo-derived one exhibited more densely entangled and crimpy nanofibrils with inhomogeneous widths, which were unique from both wood-derived TONFCs.It was further manifested that the morphologies of as-obtained TO-NFCs originated from the organization structure of microfibrils in its parent cellulose fibers other than the presence of hemicelluloses and pulping process.And physical property measurement demonstrated that the cellulose nanopapers from bamboo pulp exhibited superior optical and tensile properties (ca.200MPa, as seen in Fig.2) with respect to the ones from softwood and hardwood ones.
Yufei Chen Biyao Geng Jing Ru Congcong Tong Hongzhi Liu
College of Engineering, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang Province,31 College of Engineering, Zhejiang Agriculture and Forestry University, Hangzhou, Zhejiang Province,31
国际会议
9th International Symposium on High-Tech Polymer Materials(第9届国际高技术高分子材料学术会议)(HTPM-9)
郑州
英文
123-123
2016-07-11（万方平台首次上网日期，不代表论文的发表时间）