SDBS对多壁碳纳米管悬浮液分散性的影响
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摘要
以十二烷基苯磺酸钠(SDBS)为分散剂,氯化胆碱-丙二酸类离子液体为溶剂,通过超声分散处理多壁碳纳米管,制备了分散性良好的多壁碳纳米管悬浮液。采用紫外-可见分光光度法和粒径测试考察了SDBS对多壁碳纳米管悬浮液分散性的影响。结果表明,在多壁碳纳米管悬浮液中,当SDBS的浓度为1.2 mmol?L~(-1)左右时,悬浮碳纳米管的浓度最大,约为初始浓度的89%。悬浮液中多壁碳纳米管的平均粒径随着SDBS的浓度的增大而逐渐降低,在SDBS的浓度大于1.0 mmol?L~(-1)时,下降趋势变缓慢。添加SDBS后的多壁碳纳米管悬浮液的稳定性显著提高,192 h后基本趋于稳定。
The homogeneous and stable dispersions of multi-walled carbon nanotubes(MWCNTS)in solution were prepared by ultrasonic dispersing treatment with sodium dodecyl benzene sulfonate(SDBS)as dispersant and choline chloride-malonic acid ionic liquid analogs as solvent. The effects of SDBS on the dispersion of MWCNTS suspensions were investigated by UV-visible spectrophotometry and particle size measurement. The results showed that when the concentration of SDBS in the MWCNTS suspensions was about 1.2 mmol?L~(-1),the concentration of suspended carbon nanotube was the largest,about 89 % of the initial concentration. With the increase of SDBS concentration,the average particle size of MWCNTS in the solvents decreased gradually,and when the SDBS concentration was above 1.0 mmol?L~(-1),the decline trend became slowly. The stability of MWCNTS suspensions with surfactant SDBS was significantly improved,and the as-prepared suspensions can basically stabilize after 192 h.
The homogeneous and stable dispersions of multi-walled carbon nanotubes(MWCNTS)in solution were prepared by ultrasonic dispersing treatment with sodium dodecyl benzene sulfonate(SDBS)as dispersant and choline chloride-malonic acid ionic liquid analogs as solvent. The effects of SDBS on the dispersion of MWCNTS suspensions were investigated by UV-visible spectrophotometry and particle size measurement. The results showed that when the concentration of SDBS in the MWCNTS suspensions was about 1.2 mmol?L~(-1),the concentration of suspended carbon nanotube was the largest,about 89 % of the initial concentration. With the increase of SDBS concentration,the average particle size of MWCNTS in the solvents decreased gradually,and when the SDBS concentration was above 1.0 mmol?L~(-1),the decline trend became slowly. The stability of MWCNTS suspensions with surfactant SDBS was significantly improved,and the as-prepared suspensions can basically stabilize after 192 h.
引文
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[2]Ahmed H,Bogas J A,Guedes M,et al.Dispersion and reinforcement efficiency of carbon nanotubes in cementitious composites[J].Magazine of Concrete Research,2019,71(8):408-423.
[3]王婧雯,张静静,范同祥.碳纳米管表面处理及其在铜基复合材料中的应用[J].材料导报,2018,32(9):2932-2939+2948.
[4]许鹏.碳纳米管表面处理与分散的研究[D].广州:华南理工大学,2018.
[5]杨春霞,赵文彬.多壁碳纳米管的表面修饰及分散性[J].黑龙江科技大学学报,2018,28(3):286-291.
[6]袁明,吴文焰,张静,等.碳纳米管表面功能化修饰的研究进展[J].广州化工,2018,42(12):37-39.
[7]杨恒,刘小艳,张玉梅,等.表面活性剂应用于碳纳米管分散处理的研究现状[J].粉煤灰综合利用,2017,(4):59-63+68.
[8]Xin X,Pang J Y,Li W Z,et al.Dispersing carbon nanotubes in aqueous solutions of trisiloxane-based surfactants modified by ethoxy and propoxy groups[J].Journal of Surfactants and Detergents,2014,18(1):163-170.
[9]Li Q X,Church J S,Kafi A,et al.An improved understanding of the dispersion of multi-walled carbon nanotubes in non-aqueous solvents[J].Journal of Nanoparticle Research,2014,16(7):2513.
[10]黄苏萍,肖奇.十二烷基硫酸钠对碳纳米管悬浮液分散性能的影响[J].粉末冶金材料科学与工程,2012,17(1):133-138.
[11]卜路霞,刘成成,明媚,等.多壁碳纳米管在离子液体中分散工艺的优化[J].电镀与精饰,2016,38(11):1-5.