Page 89 - 《精细化工》2020年第7期

第 7 期 李阵群，等: 氧化石墨烯对棉秆皮纤维素气凝胶球结构的影响 ·1371·

能更好。GO 具有增强吸附性的能力，是因为 GO 中 al. Effect of dissolution systems on properties of cellulose-based
的羧基会在水中电离成阴离子，与阳离子染料亚甲 aerogels[J]. The Chinese Journal of Process Engineering (过程工程
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表面积和内部孔隙，增加了接触吸附位点。
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3 结论
of dissolution of cellulose with imidazolilum ionic liquid[J].
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（1）通过对不同纤维素含量的醇凝胶球进行形
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貌分析可知，制备过程中，纤维素含量过低，醇凝
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胶成扁圆型且易碎；纤维素含量过高，纤维素溶液 cellulose-based aerogels prepared via combing ionic liquids
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型最佳。 [8] ZHANG J, CAO Y, FENG J, et al. Graphene-oxide-sheet-induced
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（2）MCC-GO 醇凝胶球的平均粒径随着 GO 含
composite aerogels[J]. The Journal of Physical Chemistry C, 2012,
量的增加变化不明显；MCC-GO 气凝胶球受 GO 的
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响，平均粒径随着 GO 含量的增加先增大后减小， Preparation and flame-retardant performance of cellulose/graphene
粒径均匀程度降低，GO 的引入不仅增大了内部孔 oxide composite aerogels[J]. China Plastics (中国塑料), 2019, 33(1):
隙，还改变了孔隙结构，当 GO 含量为 6%时， 33-39.
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MCC-GO 气凝胶平均粒径最大为 1.79 mm，体积收
cellulose/graphene composite hydrogels prepared from ionic
缩率最小为 57.0%；GO 含量的变化对气凝胶的质量
liquids[J]. Industrial Crops and Products, 2015, 70(2): 56-63.
残余率无明显影响。
[11] XUE D (许多). Study on spinnability and adsorption of cotton stalk
（3）GO 的纳米片层能发挥良好的阻隔作用， bast microcrystalline cellulose/graphene oxide[D]. Dalian: Dalian
防止氧气进入，从而抑制热量的传递，提高 MCC Polytechnic University (大连工业大学), 2018.
气凝胶球的热稳定性。GO 表面丰富的含氧官能团 [12] WU P (吴鹏). Study on preparation and adsorption properties of the
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染料的吸附能力的作用。
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纤维素 GO 气凝胶球的制备仍需继续研究，如
composite hydrogels[D]. Tianjin: Tianjin University of Technology
何能解决 GO 团聚问题将是接下来的研究重点。 (天津理工大学), 2017.
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