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《Journal of Forestry Engineering》 2018-01
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Plasticization of bamboo fiber/polylactic acid degradable composite

ZUO Yingfeng;LI Wenhao;LI Ping;ZHAO Xing;LI Xingong;WU Yiqiang;College of Material Science & Engineering,Central South University of Forestry & Technology;  
By using bamboo fiber and polylactic acid( PLA) as rawmaterials,and ethylene glycol,glycerin,polyethylene glycol 400,urea,formamide and citric acid ester as plasticizers,bamboo fiber/PLA biodegradable composites were prepared by the melt blending method. The effects of unitary plasticization,2-element compound plasticization and 3-element compound plasticization on the tensile strength,flexural strength,elongation at break and water resistance of bamboo fiber/PLA composites were investigated. The experimental results showed that the plasticizing effects of different plasticizers on bamboo fiber/PLA composites were different. The tensile strength and flexural strength of glycerin plasticized composites was the greatest,the elongation at break of formamide plasticized composites was the highest,and the citric acid ester plasticized composites had the best water resistance. The 2-element compound plasticization can achieve synergistic plasticization effect. Bamboo fiber/PLA composites compound plasticized by glycerol/citric acid had the greatest tensile strength and flexural strength. The ethylene glycol/formamide compound plasticized bamboo fiber/PLA composites had the highest elongation at break,and the polyethylene glycol/citric acid compound plasticized bamboo fiber/PLA composite had the best water resistance. The composites had good compatibility and remarkably improved toughness by using the 3-element compound plasticization. Compared with the unitary plasticization and the 2-element compound plasticization,the glycerin/citric acid ester/glycol and glycerol/citric acid/formamide compound plasticized bamboo fiber/PLA composite had greater strength,higher elongation at break and better water resistance,as well as improved plasticizing effect.
【Fund】: 国家自然科学基金(31600460);; 中国博士后科学基金特别资助项目(2017T100615)
【CateGory Index】: TB332
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