Page 83 - 《精细化工》2020年第7期

第 37 卷第 7 期 精 细 化 工 Vol.37, No.7
202 0 年 7 月 FINE CHEMICALS July 2020

功能材料
氧化石墨烯对棉秆皮纤维素气凝胶球结构的影响

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李阵群，马孝东，魏春艳 ，郑来久，闫 俊，郑环达
（大连工业大学 纺织与材料工程学院，辽宁 大连 116034）

摘要：采用超声分散法将氧化石墨烯（GO）分散到二甲基亚砜中，再将混合液与棉秆皮微晶纤维素（MCC）和
氯化 1-丁基-3-甲基咪唑（[BMim]Cl）溶解液混合，通过垂直悬滴法制备醇凝胶球，用超临界二氧化碳干燥法制
备棉秆皮纤维素/氧化石墨烯（MCC-GO）气凝胶球。采用粒径分布软件、SEM、TG、FTIR 对样品的形貌结构
进行表征。结果表明，当 MCC 为[BMim]Cl 质量的 3%时，纤维素醇凝胶球成型效果最好，平均粒径为 2.71 mm；
随着 GO 含量（以 MCC 质量为基准，下同）的增加，醇凝胶球的平均粒径变化不明显，均匀程度降低，确定系
2
数（R ）由 0.9985 降低到 0.8897；而气凝胶球平均粒径随着 GO 含量的增加先增大后减小，粒径均匀程度降低，
2
R 由 0.9915 降低到 0.6864，当 GO 含量为 6%时，MCC-GO 气凝胶球平均粒径最大，为 1.79 mm，体积收缩率
最小，为 57.0%。GO 的添加增大了气凝胶内部孔隙，改变了孔结构，提高了 MCC 气凝胶球的热稳定性和吸附
能力。
关键词：氧化石墨烯；棉秆皮纤维素；气凝胶；收缩率；孔隙；功能材料
中图分类号：TQ427.26 文献标识码：A 文章编号：1003-5214 (2020) 07-1365-07

Effect of graphene oxide on the structure of cotton stalk bast cellulose aerogel

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LI Zhenqun, MA Xiaodong, WEI Chunyan , ZHENG Laijiu, YAN Jun, ZHENG Huanda
（School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China）

Abstract: Nano graphene oxide (GO) was dispersed into dimethyl sulfoxide by ultrasonic dispersion
method, and then the mixture was mixed with a solution of cotton stalk bast microcrystalline cellulose
(MCC) and 1-butyl-3-methylimidazole chloride ([BMim]Cl). The mixed solution was prepared into alcohol
gel spheres by a method of vertical hanging drop, and then cotton stalk bast cellulose/graphene oxide
(MCC-GO) aerogel spheres were prepared using a supercritical carbon dioxide drying method. Nano
measurer software, SEM, TG and FTIR were used to characterize the morphology and structure of the
samples. The results showed that when the content of MCC was 3% of [BMim]Cl mass, the prepared
cellulose alcohol gel spheres had the best forming effect with an average particle size of 2.71 mm. With the
increase of GO content (based on mass of MCC, the same below), the average particle size of alcohol gel
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spheres did not change significantly, and the uniformity decreased. The determination coefficient (R )
decreased from 0.9985 to 0.8897. While the average particle size of aerogel spheres increased first and then
2
decreased with the increase of GO content, and the uniformity decreased. The determination coefficient R
decreased from 0.9915 to 0.6864. When the GO content was 6%, the MCC-GO aerogel spheres had the
largest average particle size of 1.79 mm and the minimum volume shrinkage of 57.0%. The addition of GO
increased the inside porosity of aerogels, changed the pore structure, and improved the thermal stability and
adsorption of MCC aerogel spheres.
Key words: graphene oxide; cotton stalk bast cellulose; aerogel; shrinkage; porosity; functional materials

纤维素气凝胶材料具有超高孔隙率、超高比表 等特点，其在过滤吸附污染物、催化剂负载、药物
面、超低密度、优异的隔音隔热性能、低介电常数 缓释、医用生物材料、吸音隔热、锂电池等领域都

收稿日期：2019-11-11; 定用日期：2020-03-03; DOI: 10.13550/j.jxhg.20191066
基金项目：辽宁省自然基金指导计划项目（2019-ZD-0295）
作者简介：李阵群（1994—），男，硕士生，E-mail：1656305700@qq.com。联系人：魏春艳（1965—），女，教授，E-mail：weicy@dlpu.edu.cn。