Preparation of dialdehyde nanocellulose by "one step method" and research on its dispersion stability [二醛纳米纤维素的"一步法"制备及其分散稳定性研究]

作者：Meng Y.; Cao Y.; Li J.-S.; Bian J.-W.; Tian X.-Z.; Deng H.-B.; Jiang X.^*

来源：Modern Chemical Industry, 2020, 40(2): 137-142.

DOI：10.16606/j.cnki.issn0253-4320.2020.02.029

• Chitosan oligosaccharide
• Dialdehyde nanocellulose
• Disperse
• Microcrystalline cellulose
• Oxidation
• Sodium periodate

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.

• 单位
  江南大学; 华南理工大学