Research Center of Nanoscience and Nanotechnology and ‡School of Materials Science and Engineering, Shanghai University , 99 Shangda Road, Shanghai 200444, PR China.
ACS Appl Mater Interfaces. 2017 Nov 22;9(46):40766-40773. doi: 10.1021/acsami.7b09240. Epub 2017 Nov 10.
High thermal conductive nanofibrillated cellulose (NFC) hybrid films based on nanodiamond (ND) were fabricated by a facile vacuum filtration technique. In this issue, the thermal conductivity (TC) on the in-plane direction of the NFC/ND hybrid film had a significant enhancement of 775.2% at a comparatively low ND content (0.5 wt %). The NFC not only helps ND to disperse in the aqueous medium stably but also plays a positive role in the formation of the hierarchical structure. ND could form a thermal conductive pathway in the hierarchical structures under the intermolecular hydrogen bonds. Moreover, the hybrid films composed of zero-dimensional ND and one-dimensional NFC exhibit remarkable mechanical properties and optical transparency. The NFC/ND hybrid films possessing superior TC, mechanical properties, and optical transparency can open applications for portable electronic equipment as a lateral heat spreader.
采用简便的真空过滤技术制备了基于纳米金刚石（ND）的高导热纳米纤维纤维素（NFC）杂化薄膜。在本期中，NFC/ND 杂化薄膜面内热导率（TC）在相对较低的 ND 含量（0.5wt%）下显著提高了 775.2%。NFC 不仅有助于 ND 在水介质中稳定分散，而且对分层结构的形成也有积极作用。ND 可以在分子间氢键下的分层结构中形成热导通路。此外，由零维 ND 和一维 NFC 组成的杂化薄膜具有优异的机械性能和光学透明性。具有优异 TC、机械性能和光学透明性的 NFC/ND 杂化薄膜可以作为横向散热片应用于便携式电子设备。
