Preparation and properties of heat resistant polylactic acid (PLA)/Nano-SiO2 composite filament

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• 作者：Gaihong Wu 吴改红 ; Shuqiang Liu 刘淑强…
• 关键词：polylactic acid ; PLA ; composite filament ; nano ; silicon dioxide (nano ; SiO2) ; thermal property
• 刊名：Journal of Wuhan University of Technology--Materials Science Edition
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：31
• 期：1
• 页码：164-171
• 全文大小：1,641 KB
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• 作者单位：Gaihong Wu 吴改红 (1) (2)
  Shuqiang Liu 刘淑强 (1)
  Husheng Jia (3)
  Jinming Dai (1)
  
  1. College of Textile Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
  2. Fashion & Art Design Institute, DongHua University, Shanghai, 200051, China
  3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Chinese Library of Science
  
• 出版者：Wuhan University, co-published with Springer
• ISSN：1993-0437

文摘

In order to improve the thermal properties of polylactic acid (PLA) filament, nano-SiO₂ was applied to mix with PLA, then they were spun as composite filament by melt-spinning. The dispersion of nano-SiO₂ and the fracture surfaces of filaments were studied by scanning electron microscopy (SEM). The properties of composite filament, such as orientation degree, mechanical properties, and surface friction properties, were analyzed. The thermal performances of composite filament were analyzed by differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). The results showed that the nano-SiO₂ modified by 5% KH-550 could disperse evenly and loosely in nano-scale, and 1 wt% and 3 wt% nano-SiO₂ dispersed throughout PLA evenly. As the quantity of nano-SiO₂ increased, the properties of composite filament, such as orientation degree, friction coefficient, thermal decomposition temperature, and glass transition temperature, increased more or less. The breaking tenacity increased when 1 wt% SiO₂ was added in PLA, but declined when 3 wt% SiO₂ was added. Key words polylactic acid PLA composite filament nano-silicon dioxide (nano-SiO₂) thermal property