Please wait a minute...
ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2014, Vol. 15 Issue (8): 624-633    DOI: 10.1631/jzus.A1400113
Articles     
Dispersion and aggregation of single-walled carbon nanotubes in aqueous solutions of anionic surfactants
Kun Yang, Zi-li Yi, Qing-feng Jing, Dao-hui Lin
Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China
Download:     PDF (0 KB)     
Export: BibTeX | EndNote (RIS)      

Abstract  Understanding the dispersion and aggregation of carbon nanotubes (CNTs) in the aqueous environment are critical for the fate, bioavailability, and the environment and health risk assessment of them because the better suspended CNTs display a higher mobility and could transfer to a longer distance in the environment to possibly pose greater ecological and environmental risks. In this study, we have found that bulk single-walled carbon nanotubes (SWCNTs) could not be dispersed and stably suspended in water and sodium dodecylbenzene sulfonate (SDBS) solution by shaking at 140 r/min, although they could be stably suspended in SDBS solution by sonication. Even through sonication, SWCNTs suspended in SDBS solution do not remain stable at the presence of environmentally relevant cations (e.g., Na+, K+, Ca2+, and Mg2+) after dilution. These observations suggest that SWCNTs will not travel long distances in significant concentrations in the natural environment to pose great ecological and environmental risks. We also observed that the re-aggregation of suspended SWCNTs in the presence of cations was dependent on the SDBS concentration rather than the SWCNT concentration in the suspension. Both SDBS and sonication play important roles in the dispersion of SWCNTs, with sonication breaking down large aggregates of SWCNTs, while SDBS adsorbed on the SWCNTs inhibits the coagulation and aggregation by steric/electrostatic repulsion to maintain the stability of the suspension in water.

Key words： Dispersion      Aggregation      Single-walled carbon nanotubes (SWCNTs)      Anionic surfactant      Sonication     
Received: 30 April 2014      Published: 04 August 2014
CLC:  X52  
Service
E-mail this article
Add to my bookshelf
Add to citation manager
E-mail Alert
RSS
Articles by authors
Kun Yang
Dao-hui Lin
Zi-li Yi
Qing-feng Jing
Cite this article:

Kun Yang, Zi-li Yi, Qing-feng Jing, Dao-hui Lin. Dispersion and aggregation of single-walled carbon nanotubes in aqueous solutions of anionic surfactants. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2014, 15(8): 624-633.

URL:

http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A1400113     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2014/V15/I8/624

[1] Jia-jin Zhou, Kui-hua Wang, Xiao-nan Gong, Ri-hong Zhang. Bearing capacity and load transfer mechanism of a static drill rooted nodular pile in soft soil areas[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2013, 14(10): 705-719.
[2] Xiao-jun Ma, Xu-guang Jiang, Yu-qi Jin, Hong-mei Liu, Xiao-dong Li, Tong Chen, Jian-hua Yan. Dispersion modeling and health risk assessment of dioxin emissions from a municipal solid waste incinerator in Hangzhou, China[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2012, 13(1): 69-78.
[3] Yu-mei Wei, Wei-li Tian, Qing-yu Zhang, Ying-yue Zheng, Yi-ke Yang, Zu-cheng Wu, Qi Zhu, Lei Zhou, Si-mai Fang. Evaluating population exposure to N, N-dimethylformamide in a small industrial area accounting for population movement[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2011, 12(10): 794-806.
[4] Abbas MOUSTAFA, Izuru TAKEWAKI. Use of probabilistic and deterministic measures to identify unfavorable earthquake records[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2009, 10(5): 619-634.
[5] Meng-xia XU, Jian-hua YAN, Sheng-yong LU, Xiao-dong LI, Tong CHEN, Ming-jiang NI, Hui-fen DAI, Ke-fa CEN. Application of the ISCST3 model for predicting PCDD/F concentrations in agricultural soil in the vicinity of a MSWI plant in China[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(3): 373-380.
[6] GUO Hui, WANG Yun-peng, WANG Zhi-guang, ZHOU Jing-li. Improving network service performance and reliability via links trunking technologies[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(6 ): 11-.
[7] YANG Jia-shi, ZHOU Hong-gang. Interface waves between two piezoelectric half-spaces with a semiconductor film[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 2): 3-.
[8] LUO Kun, JIN Han-hui, FAN Jian-ren, CEN Ke-fa. Large eddy simulation of the gas-particle turbulent wake flow[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5(1): 106-110.
[9] LI Bao-zhong, CAI Yuan-qiang. Influence of water saturation on propagation of elastic waves in transversely isotropic nearly saturated soil[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(6): 694-701.
[10] LI Dai-xi, SHI Hong-yun, DENG Jie, XU Yuan-zhi. Study on the thermal decomposition kinetics of nano-sized calcium carbonate[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(3): 363-368.
[11] JIN Han-hui, LUO Kun, FAN Jian-ren, CEN Ke-fa. Large eddy simulation of a particle-laden turbulent plane jet[J]. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(2): 175-180.