Preparation and Mechanical Properties of Cellulose Nanowhisker/Nitrocellulose Nanocomposites

doi:10.3969/j.issn.1000-1093.2012.10.004

Abstract

Abstract: A simple chemical modification route was demonstrated using cellulose nanowhiskers (CNW) prepared by sulfuric acid hydrolysis as raw material and a mixture of nitric acid and dichloromethane as nitrification agent. The bulk degree of substitution (DS) of modified CNW was quantified by elemental analysis. The structure of modified CNW was analyzed by FT-IR and X-ray diffraction. The modified CNW can be well dispersed readily in solvents with low polarity, such as acetone, and retain their original integrity and size. Nitrocellulose nanocomposite films with different CNW contents were processed by solution casting. The tensile strength, modulus and strain at break of the nanocomposites filled with 2.0%，3.5%，5.0% and 7.0wt% modified CNWs are improved compared to the neat matrix. The tensile strength, modulus and elongation at break of the composite film filled with 3.5wt% CNW are increased by 21.7%, 32.7% and 123.6%, respectively.

Key words: composite material, cellulose nanowhiskers, nitrocellulose, dispersion, mechanical property

CLC Number:

TB383

WANG Wen-jun， FENG Lei， SHAO Zi-qiang， WANG Fei-jun， LI Yong-hong. Preparation and Mechanical Properties of Cellulose Nanowhisker/Nitrocellulose Nanocomposites[J]. Acta Armamentarii, 2012, 33(10): 1173-1177.

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