Preparation of dialdehyde nanocellulose by “one step method” and research on its dispersion stability
MENG Yu1, CAO Yu1, LI Jia-shuang1, BIAN Jia-wei1, TIAN Xiu-zhi1,2, DENG Hai-bo1, JIANG Xue1,2
1. Key Laboratory of Eco-Textiles of the Ministry of Education, Jiangnan University, Wuxi 214122, China; 2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
Abstract: At present,it is of great significance to develop an environmentally friendly,efficient and low energy consumption method for the preparation of dialdehyde nanocellulose (DANC).DANC is prepared via one step method by using microcrystalline cellulose (MCC) as raw material and sodium periodate as oxidant.The effects of different oxidation conditions on the aldehyde content and yield of the product are investigated by single factor experiments.The products prepared under the optimized oxidation conditions are characterized by FT-IR,XRD,TEM and TG.It is shown that an amorphous DANC with an aldehyde content of 6.84 mmol·g-1 can be obtained when 40 g·L-1 of microcrystalline cellulose is oxidized by 0.5 mol·L-1 of sodium periodate at 40℃ and pH=4.The yield of DANC can reach 49%.The length and diameter of DANC distribute in the range of 110-170 nm and 10-20 nm,respectively.DANC is easy to agglomerate,and adding a small amount of chitosan oligosaccharide can significantly increase the dispersion stability of DANC in water.
孟宇, 曹雨, 李加双, 卞佳伟, 田秀枝, 邓海波, 蒋学. 二醛纳米纤维素的“一步法”制备及其分散稳定性研究[J]. 现代化工, 2020, 40(2): 137-142.
MENG Yu, CAO Yu, LI Jia-shuang, BIAN Jia-wei, TIAN Xiu-zhi, DENG Hai-bo, JIANG Xue. Preparation of dialdehyde nanocellulose by “one step method” and research on its dispersion stability. Modern Chemical Industry, 2020, 40(2): 137-142.
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