Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7889491 | Composites Part A: Applied Science and Manufacturing | 2018 | 37 Pages |
Abstract
Smart materials with high performance are useful for multi-dimensional utilities. In this context, bio-resource derived aliphatic hyperbranched polyurethane nanocomposites (HPU/Si-GO) were fabricated in situ with different wt% of the 3-aminopropyltriethoxysilane-modified graphene oxide sheets (Si-GO). The nanocomposites were characterized by FT-IR, Raman, PXRD, EDX, SEM and TEM analyses. Significant enhancements of mechanical properties like tensile strength (â¼247%), elongation at break (â¼206%) and toughness (â¼339%) were observed upon incorporation of very low amount (up to 2â¯wt%) of Si-GO in HPU matrix. The nanocomposites exhibited excellent self healing ability under microwave (within 50-60â¯s at 450â¯W) and sunlight (within 4-6â¯min under 106â¯lx) exposure with high efficiency (up to 100%). The surfaces of the nanocomposites also displayed inherent hydrophobicity (water contact angles up to 105°) without any additional surface modification. Hence, development of such high performance polymeric materials with inherent smart features augurs well for versatile applications including self healing and self cleaning materials.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Rajarshi Bayan, Niranjan Karak,