Preparation and characterization of nano‐SiO2 reinforced alginate‐based nanocomposite films (II) |
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| Authors: | Manli Yang Yanzhi Xia |
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| Affiliation: | 1. College of Chemistry and Pharmaceutical Science, Qingdao Agricultural University, Qingdao, People's Republic of China;2. College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, People's Republic of China;3. Collaborative Innovation Center for Marine Biomass Fibers, Materials and Textiles of Shandong Province, Qingdao University, Qingdao, People's Republic of China;4. State Key Laboratory Cultivating Base for New Fiber Materials and Modern Textiles, Qingdao University, Qingdao, People's Republic of China |
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| Abstract: | Crosslinked alginate‐based nanocomposites at different SiO2 contents were prepared successfully by blending the nano‐SiO2 solution into low concentration alginate solution (0.5 wt %), with the alginate concentration increased step by step to the resulted concentration, in this course glycerol was used as plasticizer and 5 wt % CaCl2 as crosslinker. The combined effect of SiO2 content (1.5–8 wt %) on the microstructural, physical, mechanical, and optical properties of the nanocomposite films were investigated. The results showed that tensile strength and elongation was improved by about 40.33% and 89%, respectively, upon increasing the SiO2 content to 4.5 wt %. In addition, water vapor permeability and swelling degree decreased by 19% and 16% with increasing SiO2 content up to 8 and 4.5 wt %, respectively with respect to pure crosslinked alginate film. Thermogravimetric analysis also revealed that nano‐SiO2 can improve the thermal stability of sodium alginate films produced by this method. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 45286. |
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| Keywords: | blending nanocomposite film nano‐SiO2 sodium alginate |
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