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《Materials Review》 2018-S1
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Effect of Microstructure of Bagasse on Structure and Properties of Polylactic Acid/Bagasse Composites

HONG Haoqun;GUO Quannan;QIU Chuhao;LIU Hao;ZHANG Haiyan;School of Materials and Energy,Guangdong University of Technology;Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter,Guangdong University of Technology;  
Methods in terms of alkali treatment,silane coupling agent modification and combination of alkali treatment and silane coupling agent modification were used to modify bagasse fiber(BF).Fourier transform infrared spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),thermogravimetry(TGA)and mechanical properties testing were used to characterize and analyze the structure and properties of modified BF.Results showed that the used methods changed the structure of BF and their bonding modes.Alkali treatment removed the small molecular compounds such as hemicellulose and parts of amorphous cellulose,resulting in the decreasing of thermal stability of BF and increasing of crystallinity of BF.The concentration of alkali solution was too high and the time for alkali treatment was so long that BF was fibrillated.The fibrillation of BF increased the reaction area of BF with the coupling agents,but decreased the strength of BF that is adverse to the reinforcement of BF.Therefore,BF/PLA composites modified by silane coupling agents demonstrated the best compatibility and mechanical properties,BF/PLA composites modified by combination of alkali treatment and silane coupling agents demonstrated better compatibility and mechanical properties,while BF/PLA composites modified by alkali treatment did not demonstrate good compatibility and mechanical properties in the compared BF/PLA composites.
【Fund】: 国家自然科学基金(51276044);; 广东省科技计划项目(2014A010105047);; 广州市科技计划项目(201707010367)
【CateGory Index】: TB332
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