Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7891015 | Composites Part A: Applied Science and Manufacturing | 2016 | 8 Pages |
Abstract
Hydrophobic cellulose nanofibers (CNFs) were prepared by surface modification using alkenyl succinic anhydride (ASA). The hydrophobicity of CNFs was varied by changing the degree of substitution (DS) from 0 to 0.83. Modified CNFs were mixed with high-density polyethylene (HDPE) using a twin-screw extruder and the resulting composites were injection molded. The tensile properties initially improved with increasing DS up to â¼0.3-0.5, and then decreased with further substitution. The tensile strength and modulus of 10Â wt.% HDPE/CNF composites containing 8.8Â wt.% ASA (DS: 0.44) were 43.4Â MPa and 1.97Â GPa, respectively. These values were both almost 70% higher than those of composites containing unmodified CNF, and 100% and 86% higher, respectively, than those for pure HDPE. X-ray computed tomography measurements showed that CNFs modified with a DS of 0.44 were dispersed uniformly within the resin matrix, whilst unmodified CNFs and those modified with a DS of 0.77 agglomerated within the composites.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Akihiro Sato, Daisuke Kabusaki, Hiroaki Okumura, Takeshi Nakatani, Fumiaki Nakatsubo, Hiroyuki Yano,