4.7 Article

Large-scale fabrication of boron nitride nanotubes and their application in thermoplastic polyurethane based composite for improved thermal conductivity

期刊

CERAMICS INTERNATIONAL
卷 44, 期 18, 页码 22794-22799

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.09.069

关键词

BNNTs; Large-scale fabrication; VLS; Polymer composite; Thermal conductivity

资金

  1. National Key R&D Program of China [22798, 2017YFB0406000]
  2. Key Research Program of Frontier Science of Chinese Academy of Sciences [QYZDB-SSW-SLH031]
  3. Thousand Youth Talents Plan
  4. Postdoctoral Foundation of China [2016M601905, 2017M621855]
  5. Natural Science Foundation of Jiangsu Province, China [BK20160399]
  6. Postdoctoral Foundation of Jiangsu Province [1601065B]
  7. Science and Technology Project of Nanchang [2017-SJSYS-008]

向作者/读者索取更多资源

The large-scale manufacture of inexpensive boron nitride nanotubes (BNNTs) has proven difficult in recent decades. In this study, BNNTs are fabricated on a massive scale by ball-milling a mixture of boron oxide (B2O3), amorphous boron powder (B), and magnesium diboride (MgB2) and then annealing the resulting product in NH3, which follows a vapor-liquid-solid growth mechanism. MgB2 serves as a catalyst in the growth process, and the vaporous B2O3 and diboron dioxide (B2O2) produced from the reaction of B2O3 and B are efficient sources of boron. The obtained BNNTs can be dispersed well in dimethyl formamide, possibly as a result of some cracked structures in the BNNTs and impurities that form during the synthesis process. Taking advantage of the good dispersity, the uniform BNNT/thermoplastic polyurethane composite films are prepared via solution blending. The incorporation of BNNTs apparently enhances the thermal conductivity of the neat thermoplastic polyurethane. This article contributes to the low-cost fabrication of BNNTs and their potential application as fillers in polymers.

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