Quantifying the Solubility of Boron Nitride Nanotubes and Sheets with Static Light Scattering and Refractometry
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- 作者：M. Mutz ; Eric Eastwood ; M. D. Dadmun
- 刊名：The Journal of Physical Chemistry C
- 出版年：2013
- 出版时间：June 27, 2013
- 年：2013
- 卷：117
- 期：25
- 页码：13230-13238
- 全文大小：266K
- 年卷期：v.117,no.25(June 27, 2013)
- ISSN：1932-7455
文摘
The dissolution of nanoparticles, particularly those containing boron, is an important area of interest for polymer nanocomposite formation and material development. In this work, the solubility of boron nitride nanotubes (BNNT), functionalized boron nitride nanotubes (FBNNT), and boron nitride sheets (BN-ZG) is quantified in toluene and THF with static light scattering, refractometry, UV鈥搗is spectroscopy, and physical observations. UV鈥搗is spectroscopy provides a method to determine the concentration and solubility limits of the solutions tested. Using light scattering, the second virial coefficient, A2, is determined and used to calculate 蠂, the solute鈥搒olvent interaction parameter. The Hildebrand solubility parameter, 未, is then extracted from this data using the Hildebrand鈥揝catchard Solution Theory. A list of potential good solvents based on the estimated 未 value is provided for each nanoparticle. Single-walled carbon nanotubes (SWNTs) and prepolymers (EN4 and EN8) used to synthesize polyurethanes were also tested, because the published 未 and molar attraction constants of these materials provided a self-consistent check. The dn/dc of SWNTs and boron-containing particles was measured for the first time in this work. A solvent screen for BN-ZG provides additional information that supports the obtained 未 and 蠂. Three systems were found to have 蠂 values below 0.5 and were thermodynamically soluble: BNNT in THF, EN8 in THF, and EN8 in toluene.