Cellulose nanofiber network for moisture stable, strong and ductile biocomposites and increased epoxy curing rate

被引：124

作者：

Ansari, Farhan ^{[1
,2
]}

Galland, Sylvain ^{[1
,2
]}

Johansson, Mats ^{[1
,2
]}

Plummer, Christopher J. G. ^{[3
]}

Berglund, Lars A. ^{[1
,2
]}

机构：

[1] Royal Inst Technol KTH, Dept Fiber & Polymer Technol, SE-10044 Stockholm, Sweden

[2] Royal Inst Technol, Wallenberg Wood Sci Ctr, SE-10044 Stockholm, Sweden

[3] Ecole Polytech Fed Lausanne, Lab Technol Composites & Polymeres LTC, CH-1015 Lausanne, Switzerland

来源：

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2014年 / 63卷

关键词：

Nano-structures; Cure behavior; Interface; Nanocellulose biocomposite; MICROFIBRILLATED CELLULOSE; NANOPAPER STRUCTURES; SURFACE-AREA; NANOCOMPOSITES; FIBER; RESIN; NANO; ACCELERATORS; MECHANISM; KINETICS;

D O I：

10.1016/j.compositesa.2014.03.017

中图分类号：

T [工业技术];

学科分类号：

120111 [工业工程];

摘要：

Nanocomposites with high volume fractions (15-50 vol%) of nanofibrillated cellulose (NFC) were prepared by impregnation of a wet porous NFC network with acetone/epoxy/amine solution. Infrared spectroscopy studies revealed a significant increase in curing rate of epoxy (EP) in the presence of NFC. The NFC provided extremely efficient reinforcement (at 15 vol%: 3-fold increase in stiffness and strength to 5.9 GPa and 109 MPa, respectively), and ductility was preserved. Besides, the glass transition temperature increased with increasing NFC content (from 68 degrees C in neat epoxy to 86 degrees C in 50 vol% composite). Most interestingly, the moisture sorption values were low and even comparable to neat epoxy for the 15 vol% NFC/EP. This material did not change mechanical properties at increased relative humidity (90% RH). Thus, NFC/EP provides a unique combination of high strength, modulus, ductility, and moisture stability for a cellulose-based biocomposite. Effects from nanostructural and interfacial tailoring are discussed. (C) 2014 The Authors. Published by Elsevier Ltd.

引用

页码：35 / 44

页数：10

共 55 条

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