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

林产化学与工业 ›› 2018, Vol. 38 ›› Issue (2): 67-74.doi: 10.3969/j.issn.0253-2417.2018.02.009

氧化纤维素的制备及其对碳纳米管的分散效果

刘真真¹, 郭延柱^1,2, 王兴¹, 李海明¹

1. 大连工业大学轻工与化学工程学院, 辽宁大连 116034;
2. 华南理工大学制浆造纸工程国家重点实验室, 广东广州 510640

收稿日期:2017-10-09 出版日期:2018-04-25 发布日期:2018-04-28
通讯作者: 郭延柱,副教授,博士,硕士生导师,主要从事生物质基功能材料的开发与利用;E-mail:guoyz@dlpu.edu.cn。 E-mail:guoyz@dlpu.edu.cn
作者简介:刘真真(1992-),女,山东滨州人,硕士生,主要从事制浆造纸清洁化生产及生物质开发利用研究
基金资助:
国家自然科学基金青年基金资助项目（31500493）；辽宁省博士科研启动基金指导计划项目（20170520300）；制浆造纸工程国家重点实验室开放基金资助（201747）

Preparation of Oxidized Cellulose Being Used as Dispersant for Carbon Nanotubes

LIU Zhenzhen¹, GUO Yanzhu^1,2, WANG Xing¹, LI Haiming¹

1. School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China;
2. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China

Received:2017-10-09 Online:2018-04-25 Published:2018-04-28

摘要/Abstract

摘要： 以针叶木溶解浆纤维素作为原料，经HNO₃/H₃PO₄/NaNO₂氧化体系选择性氧化后，制备了氧化纤维素（OC）。考察时间、温度及NaNO₂用量对OC的得率及羧基含量的影响，利用傅里叶红外光谱（FT-IR）、X射线衍射仪（XRD）和热重分析仪（TGA）对OC结构和性能进行表征。采用超声波法得到OC水溶液纳米粒子，透射电子显微镜（TEM）和动态光散射（DLS）结果表明：OC在水溶液中可形成均一分散的球形粒子，粒径位于纳米尺寸范围内（30~80 nm）。OC的较优制备工艺条件为：温度为50℃，NaNO₂用量为1.4%，时间为12 h。FT-IR和XRD分析表明：OC分子链中成功引入了羧基官能团，氧化过程中纤维素结晶区和无定形区均受到破坏。相比水和纤维素而言，OC水溶液纳米粒子对碳纳米管（CNT）具有优异的分散效果，其剩余浊度为82.5 NTU，分散效果持续稳定30天以上。

关键词: 氧化纤维素, HNO₃/H₃PO₄/NaNO₂氧化体系, 纳米粒子, 多壁碳纳米管

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

中图分类号:

TQ35

刘真真, 郭延柱, 王兴, 李海明. 氧化纤维素的制备及其对碳纳米管的分散效果[J]. 林产化学与工业, 2018, 38(2): 67-74.

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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氧化纤维素的制备及其对碳纳米管的分散效果

Preparation of Oxidized Cellulose Being Used as Dispersant for Carbon Nanotubes

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