Extraordinary toughening and strengthening effect in polymer nanocomposites using lignin-based fillers synthesized by ATRP

POLYMER

卷:72

Article

Shah, Tejank¹  Gupta, Chetali¹  Ferebee, Rachel L.¹  Bockstaller, Michael R.¹  Washburn, Newell R.^2,3 

[1] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

[2] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA 15213 USA

[3] Carnegie Mellon Univ, Dept Biomed Engn, Pittsburgh, PA 15213 USA

关键词: Lignin;    ATRP;    Nanocomposite;    Renewable materials;    Plastics;   

DOI  :  10.1016/j.polymer.2015.04.073

来源: Elsevier

【 摘 要 】

Understanding of the governing parameters that control the interaction of bio-sourced fillers with synthetic polymer materials is a long-standing challenge for their exploitation as a platform for material engineering. For the case of graft-lignin embedded in poly (methyl methacrylate) (PMMA) it is demonstrated that tethering of polymeric chains with appropriate chain length to the surface of lignin-fillers dramatically increases the mechanical properties of PMMA/lignin composites, suggesting the PMMA grafts significantly enhanced filler-matrix interactions. Most metrics were maximized at 1% loading, with a 3-fold increase in yield stress, a 4-fold increase in tensile strength, and a 7-fold increase in toughness, with a combination of properties that compare favorably to high-performance engineering polymers and polymer nanocomposites based on inorganic nanoparticles. The versatility of the surface-initiated controlled radical polymerization used for polymer graft modification suggests that the approach should be broadly applicable to a wide range of commodity and engineering polymers. (C) 2015 Elsevier Ltd. All rights reserved.

【 授权许可】

Free