氧化纤维素的制备及其对碳纳米管的分散效果

doi:10.3969/j.issn.0253-2417.2018.02.009

Abstract

Abstract: The oxidized cellulose(OC) was prepared through selective oxidation of softwood dissolving pulp cellulose by HNO₃/H₃PO₄/NaNO₂ oxidant. The effects of oxidizing conditions, e.g., oxidizing time, temperature and dosages of NaNO₂ on the yields and carboxyl groups contents of OC were studied. The structures and properties of OC samples were characterized by Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD) and thermogravimetric analysis(TGA) respectively. The nanoparticle solution was prepared by dispersing the OC sample in aqueous solution under ultrasound wave. The sizes and morphologies of particles were characterized by dynamic light scattering(DLS) and transmission electron microscopy(TEM). The results showed that the nanoparticles were spherical in shape with monodisperse, and the sizes of micelles were in the range of 30 nm to 80 nm. The optimum conditions of OC preoaration were as the followings:reaction temperature 50℃, NaNO₂ dosage 1.4% and reaction for 12 h. Compared with water and cellulose, the OC nanoparticle was an excellent aqueous dispersant for multi-walled carbon nanotube(CNT).

Key words: oxidized cellulose, HNO₃/H₃PO₄/NaNO₂ oxidant systems, nanoparticles, multi-walled carbon nanotube

CLC Number:

TQ35

LIU Zhenzhen, GUO Yanzhu, WANG Xing, LI Haiming. Preparation of Oxidized Cellulose Being Used as Dispersant for Carbon Nanotubes[J]. Chemistry and Industry of Forest Products, 2018, 38(2): 67-74.

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Preparation of Oxidized Cellulose Being Used as Dispersant for Carbon Nanotubes

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