From elastomeric to rigid polyurethane/cellulose nanocrystal bionanocomposites

被引：65

作者：

Saralegi, A. ^{[1
]}

Rueda, L. ^{[1
]}

Martin, L. ^{[1
]}

Arbelaiz, A. ^{[1
]}

Eceiza, A. ^{[1
]}

Corcuera, M. A. ^{[1
]}

机构：

[1] Univ Basque Country UPV EHU, Polytech Sch, Dept Chem & Environm Engn, Mat Technol Grp, Donostia San Sebastian 20018, Spain

来源：

COMPOSITES SCIENCE AND TECHNOLOGY | 2013年 / 88卷

关键词：

Particle-reinforced composites; Nano composites; Cellulose nanocrystal; Casting; Mechanical properties; CURRENT INTERNATIONAL RESEARCH; CELLULOSE NANOCRYSTALS; POLYMER NANOCOMPOSITES; MORPHOLOGY; STRENGTH; REINFORCEMENT; NANOFIBRES; TRANSITION; BEHAVIOR; WHISKERS;

D O I：

10.1016/j.compscitech.2013.08.025

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Bionanocomposites with high content of carbon coming from renewable resources were synthesized. Different cellulose nanocrystal (CNC) contents were added by solvent casting procedure to highly crystalline bio-based polyurethanes with different soft/hard segment ratios. Properties of the resulting bionanocomposites were evaluated in order to study the effect of both CNC content and polyurethane soft/hard segment ratio on the structure/properties relationships. Thereby, from elastomeric to rigid polyurethane/CNC bionanocomposites containing 1, 3, 5 and 10 wt% of CNC and bio-based polyurethanes with 17 and 46 wt% of hard segment content were prepared. CNC were isolated by sulphuric acid hydrolysis, obtaining rod-like crystalline structures. A good dispersion of CNC was obtained for all the bionanocomposites, which interact with the polyurethane segment that was not associated in ordered domains. Thermomechanical and tensile tests revealed that those bionanocomposites presented good mechanical properties, competing with petrochemical based nanocomposites. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：39 / 47

页数：9

共 49 条

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