The Effect of cellulose oxidation on interfacial bonding of nano-TiO₂ coating to flax fibers

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• 作者：MReza Foruzanmehr ; Lina Boulos ; Pascal Y. Vuillaume ; Saïd Elkoun…
• 关键词：Cellulose oxidation ; Flax fiber ; TiO2 coating ; Interfacial adhesion ; Mechanical properties
• 刊名：Cellulose
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：24
• 期：3
• 页码：1529-1542
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Bioorganic Chemistry; Physical Chemistry; Organic Chemistry; Polymer Sciences;
• 出版者：Springer Netherlands
• ISSN：1572-882X
• 卷排序：24

文摘

In this study, flax fibers were oxidized in order to improve the interfacial adhesion of cellulosic fibrils to a TiO₂ coating. The TiO₂ coating was created on the flax fiber by a Sol–Gel dip-coating technique. The effect of cellulose oxidation and the consequent TiO₂ grafting was studied on cellulose crystalline structures using X-ray diffraction. X-ray photoelectron spectroscopy was used to compare the reactivity of TiO₂ Sol with oxidized and non-oxidized cellulosic fibers. In addition, transmission electron microscopy and atomic force microscopy were applied to characterize the quality of the interface between the fibers and TiO₂ coating. Finally, the effect of cellulose oxidation on the mechanical properties of TiO₂-grafted flax strands was investigated by tensile tests. The results showed that the oxidation increased significantly the reactivity of the cellulosic surfaces with TiO₂ Sol. This method was able to increase the quality of the interface between flax fiber and TiO₂ coating, which improved the thermal resistance of the fibers. Eventually, the oxidation of the fiber together with the TiO₂ grafting increased significantly both ductility and maximum tensile strength of the flax strands.