期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 124, 期 -, 页码 1238-1245出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.12.012
关键词
Sodium alginate; Graft; Ammonium persulphate
资金
- State Key Laboratory of Bio-Fibers and Eco-Textiles [KF 2017kfkt13]
- Primary Research & Development Plan of Shandong Province [2017GNC13110]
- Doctor Star-up Foundation of Qingdao Agriculture University [663/1117013, 663/1117012]
The graft copolymerization of methyl methacrylate (MMA) onto alginate was carried out in aqueous media by initiators of ammonium persulphate under a nitrogen gas atmosphere. Then, the grafting of PMMA chains onto the alginate backbone was confirmed through the study of Fourier transform infrared, X-ray diffraction, scanning electron microscopy and H-1 nuclear magnetic resonance spectroscopy. At last, a thin and transparent polymethyl methacrylate grafted alginate film with high strength was obtained by the casting method. The effect of MMA/SA ratio or percentage of graft (G%) on mechanical properties, thermal stability (thermogravimetric analysis/differential thermogravimetry analyses), color, opacity and water resistance of composite films were characterized. Results showed the homogeneous transparent films could be obtained while G% was lower than 8.64%. After being grafted by PMMA, the tensile strength of the films was distinctly improved by 205.3%, as well the elongation at break (E%) by 41.7% while the MMA/SA (g/g) is 0.3. On the other hand, water resistance, thermal stability and crystallinity of the films were improved, however, the transparency was slightly decreased. (C) 2018 Published by Elsevier B.V.
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