Reinforcement of optically healable supramolecular polymers with cellulose nanocrystals

Souleymane Coulibaly, Anita Roulin, Sandor Balog, Mahesh V. Biyani, E. Johan Foster, Stuart J. Rowan, Gina L. Fiore*, Christoph Weder

*この研究の対応する著者

研究成果: Article査読

82 被引用数 (Scopus)

抄録

We report the preparation and characterization of light-healable nanocomposites based on cellulose nanocrystals (CNCs) and a metallosupramolecular polymer (MSP) assembled from a telechelic poly(ethylene-co-butylene) that was end-functionalized with 2,6-bis(1′- methylbenzimidazolyl) pyridine (Mebip) ligands and Zn(NTf2) 2. The polymer absorbs incident ultraviolet (UV) radiation and converts it into heat, which causes dissociation of the metal-ligand motifs. This process liquefies the material, and small defects are readily filled. When the UV light is switched off, the MSP reassembles and the original properties are restored. The introduction of CNCs into the MSP matrix leads to a significant increase of the stiffness and strength, from 52 and 1.7 MPa for the neat polymer to 135 and 5.6 MPa upon introduction of 10% w/w CNCs. The Zn 2+ ions bind to the CNCs which means the metal:ligand ratio of the MSP must be adjusted accordingly. In nanocomposites thus made, deliberately introduced defects can be efficiently healed.

本文言語English
ページ(範囲)152-160
ページ数9
ジャーナルMacromolecules
47
1
DOI
出版ステータスPublished - 2014 1 14
外部発表はい

ASJC Scopus subject areas

  • 有機化学
  • 材料化学
  • ポリマーおよびプラスチック
  • 無機化学

フィンガープリント

「Reinforcement of optically healable supramolecular polymers with cellulose nanocrystals」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル