期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 111, 期 -, 页码 959-966出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.01.056
关键词
Acetylated nanofibrillated cellulose (ANFC); Chemical-mechanical combined process; Reinforcing effect on starch films
资金
- National Natural Science Foundation of China [31701527]
- Key Program of the National Natural Science Foundation of China [31230057]
- Priority Academic Program Development of Jiangsu Higher Education institutions
- Program of Collaborative innovation center of food safety and quality control in Jiangsu Province
Acetylated nanofibrillated cellulose (ANFC) with different degrees of substitution (DS) was prepared from cornstalk microcrystalline cellulose (MCC) using chemical-mechanical combined processes. The physicochemical properties of nanofibrillated cellulose (NFC) and ANFC were investigated together with the influence of added nanoparticles on the mechanical properties of starch films. The acetylation reaction was monitored by Fourier transform infrared (FT-IR) and titration. Particle size and morphological of NFC and ANFC were studied by atomic force microscope (AFM). The results suggested that NFC had nano-order-unit web-like network with mean diameter of similar to 24 nm. The thermostability of all samples was found to decrease as the modification extent rose, and mechanical disposal revealed no significant influence on the DS and crystalline structure of cellulose. The ANFC with the DS value of 035 demonstrated the best enhancement effect on starch films, with increased tension strength (TS) by 201%. The tensile tests confirmed that the web-like network structure of NFC was more conducive to strength, and proper chemical modification could improve the uniform dispersion of nano-fillers in starch to result in higher strength performances. (C) 2018 Elsevier B.V. All rights reserved.
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