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Mechanical and moisture barrier properties of corn distarch phosphate film influenced by modified microcry stalline corn straw cellulose
Author(s) -
Shao Xinru,
Sun Haitao,
Jiang Ruiping,
Qin Ting,
Ma Zhongsu
Publication year - 2018
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.9109
Subject(s) - crystallinity , materials science , composite number , cellulose , ultimate tensile strength , microstructure , scanning electron microscope , fourier transform infrared spectroscopy , composite material , food packaging , moisture , chemical engineering , chemistry , food science , engineering
Abstract BACKGROUND In this paper, a novel modified microcrystalline corn straw cellulose (MMCSC) was prepared by ultrasonic/microwave‐assisted treatment. Effective incorporation of MMCSC into corn distarch phosphate (CDP)‐based composite films was investigated. RESULTS As the proportion of MMCSC was increased, tensile strength increased initially before decreasing, and the elongation at break always decreased. The composite film of MMCSC20 showed the lowest water vapor permeability (2.917 × 10 −7 g m −1 h −1 Pa −1 ). The measurement of surface color showed that by the increasing of the MMCSC proportion in composite films, the L * and b * values and the total color difference (Δ E * ) increased, while a * values decreased. Fourier transform infrared spectroscopy and X‐ray diffraction analysis indicated that, with the incorporation of MMCSC, the stable structure of the films was enhanced through cross‐linking and the crystallinity was increased. A scanning electron microscopy study revealed the surface microstructure of films (MMCSC0–MMCSC30) was smooth and homogeneous, and there was no distinct separation in the matrix of composite films. CONCLUSION The incorporation of suitable MMCSC could improve the properties of composite films. The CDP–MMCSC films, which are completely biodegradable and environmental friendly, have a high potential to be used for food packaging. © 2018 Society of Chemical Industry