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Polymers 2015, 7(7), 1331-1345; doi:10.3390/polym7071331

Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites

Key Lab of Functional Textile Materials, Eastern Liaoning University, Dandong, 118003, Liaoning, China
School of Chemical Engineering, Eastern Liaoning University, Dandong, 118003, Liaoning, China
Authors to whom correspondence should be addressed.
Academic Editor: Lloyd M. Robeson
Received: 13 June 2015 / Revised: 7 July 2015 / Accepted: 8 July 2015 / Published: 14 July 2015
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In the present paper, a series of totally novel bio-nanocomposite films from cellulose laurate (CL) and starch nanocrystals acetate (SNA) were fabricated, and the properties of nanocomposite films were investigated in detail. SNA was obtained by modifying starch nanocrystals (SNs) produced by sulfuric acid hydrolysis of corn starch with acetic anhydride. The favorable dispersity of SNA in chloroform made it ready to convert into nanocomposite films with CL via casting/evaporation method. The transmittance, thermal behavior, mechanical properties, barrier properties and hydrophobicity of CL/SNA nanocomposite films were investigated with UV-vis spectrophotometer, simultaneous thermal analyzer (STA), universal tensile tester/dynamic thermomechanical analysis (DMA), water vapor permeation meter/oxygen permeability tester, and contact angle tester, respectively. The transmittance of nanocomposite films decreased with the increase of SNA content. Thermogravimetric analysis (TGA) results showed that the introduction of SNA into CL matrix did not severely decrease the thermal behavior of CL/SNA nanocomposites. Moreover, non-linear and linear mechanical analysis reflected the enhancement of SNA. At lower contents of SNA (<5.0 wt%), the values of Young’s modulus, tensile strength and the elongation at break of nanocomposite films were comparable with those of neat CL. However, with the increase of SNA, the Young’s modulus and tensile strength were improved significantly and were accompanied by the decreased elongation at break. The water vapor permeability (WVP) and oxygen permeability (PO2) of CL/SNA nanocomposite films were significantly improved by the addition of SNA. View Full-Text
Keywords: cellulose laurate (CL); starch nanocrystals acetate (SNA); CL/SNA bio-nanocomposite; tensile property; barrier property cellulose laurate (CL); starch nanocrystals acetate (SNA); CL/SNA bio-nanocomposite; tensile property; barrier property

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Huang, F.-Y.; Wu, X.-J.; Yu, Y.; Lu, Y.-H. Preparation and Properties of Cellulose Laurate (CL)/Starch Nanocrystals Acetate (SNA) Bio-nanocomposites. Polymers 2015, 7, 1331-1345.

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