Jump to main content
Jump to site search

Issue 7, 2016
Previous Article Next Article

Thermodynamic approach to boron nitride nanotube solubility and dispersion

Author affiliations

Abstract

Inadequate dispersion of nanomaterials is a critical issue that significantly limits the potential properties of nanocomposites and when overcome, will enable further enhancement of material properties. The most common methods used to improve dispersion include surface functionalization, surfactants, polymer wrapping, and sonication. Although these approaches have proven effective, they often achieve dispersion by altering the surface or structure of the nanomaterial and ultimately, their intrinsic properties. Co-solvents are commonly utilized in the polymer, paint, and art conservation industries to selectively dissolve materials. These co-solvents are utilized based on thermodynamic interaction parameters and are chosen so that the original materials are not affected. The same concept was applied to enhance the dispersion of boron nitride nanotubes (BNNTs) to facilitate the fabrication of BNNT nanocomposites. Of the solvents tested, dimethylacetamide (DMAc) exhibited the most stable, uniform dispersion of BNNTs, followed by N,N-dimethylformamide (DMF), acetone, and N-methyl-2-pyrrolidone (NMP). Utilizing the known Hansen solubility parameters of these solvents in comparison to the BNNT dispersion state, a region of good solubility was proposed. This solubility region was used to identify co-solvent systems that led to improved BNNT dispersion in poor solvents such as toluene, hexane, and ethanol. Incorporating the data from the co-solvent studies further refined the proposed solubility region. From this region, the Hansen solubility parameters for BNNTs are thought to lie at the midpoint of the solubility sphere: 16.8, 10.7, and 9.0 MPa1/2 for δd, δp, and δh, respectively, with a calculated Hildebrand parameter of 21.8 MPa1/2.

Graphical abstract: Thermodynamic approach to boron nitride nanotube solubility and dispersion

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Nov 2015, accepted on 28 Jan 2016 and first published on 28 Jan 2016


Article type: Paper
DOI: 10.1039/C5NR08259E
Author version
available:
Download author version (PDF)
Citation: Nanoscale, 2016,8, 4348-4359

  •   Request permissions

    Thermodynamic approach to boron nitride nanotube solubility and dispersion

    A. L. Tiano, L. Gibbons, M. Tsui, S. I. Applin, R. Silva, C. Park and C. C. Fay, Nanoscale, 2016, 8, 4348
    DOI: 10.1039/C5NR08259E

Search articles by author

Spotlight

Advertisements