Title
Synthesis Of Cation-Exchanged Laponite Suspensions By Laser Ablation Of Microsized-Metal Particles In Liquid
Keywords
Cation-exchange laponite; Laser ablation; Rheology; Thixotropy
Abstract
Laser ablation in the liquid technique has been used to synthesize cation-exchanged laponite suspensions. In summary, laser ablation of the microsize-metal powder (Co, Al, and Cu) dispersed in an aqueous solution containing deionized water laponite crystals was carried out using laser beam generated by a single-mode, Q-switched NdYag laser operating at 532 nm with a pulse duration of 5.5 ns and 10 Hz repetition rate. Laser fluence was 0.265 J/cm2 for all tests. For all samples, the mass fraction of laponite was 1%. General observations of the prepared samples indicated that an aqueous suspension of 1 wt% laponite retained its free flowing liquid phase characteristics even after aging for several weeks. When bivalent cationic metals (Cu, Co, Al) were ablated in it for about 1 h, even with a small amount of the metal (0.025% and 0.050%) were generated, the suspension became highly viscous and behaved as a shear-thinning and thixotropic material. That is, the suspension gelled strongly when it was allowed to rest. The gels, however, could easily be reverted to a low viscosity liquid with simple shaking. Information from TEM and XRD analysis indicated that such a solgel transformation might be due to the charge exchange between the cationic species produced during the laser ablation and the sodium ions in the interlayers of the clay sheets.
Publication Date
3-1-2011
Publication Title
Optics and Lasers in Engineering
Volume
49
Issue
3
Number of Pages
396-402
Document Type
Article
Personal Identifier
scopus
DOI Link
https://doi.org/10.1016/j.optlaseng.2010.11.010
Copyright Status
Unknown
Socpus ID
78650827295 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/78650827295
STARS Citation
Phuoc, Tran X. and Chen, Ruey Hung, "Synthesis Of Cation-Exchanged Laponite Suspensions By Laser Ablation Of Microsized-Metal Particles In Liquid" (2011). Scopus Export 2010-2014. 3356.
https://stars.library.ucf.edu/scopus2010/3356