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Effect of KH550 on Properties of PLA Based 3D Printing Wire with High MNC Content
  
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Key Words:MNC; PLA; 3D printing; modification; composites
Fund Project:国家自然科学基金（31870565）。
Author NameAffiliation
LU Yingzhao College of Light Industry and Food Engineering, Jiangsu Co Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 
XU Junfei College of Light Industry and Food Engineering, Jiangsu Co Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 
CHEN Yujie College of Light Industry and Food Engineering, Jiangsu Co Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 
WANG Zhiguo* College of Light Industry and Food Engineering, Jiangsu Co Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 
MA Jinxia College of Light Industry and Food Engineering, Jiangsu Co Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 
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Abstract:
      In this study， the micro-nanocellulose（MNC） dispersed in dichloromethane was mixed with polylactic acid （PLA） dissolved in dichloromethane by solution mixing method. The advantages of the composite materials prepared by solution mixing method compared with the melt blending method were analyzed. Further， MNC was modified with silane coupling agent （KH550） to improve the interface compatibility of the composite. The effects of the KH550 amount on the crystal structure of cellulose and the morphology as well as mechanical properties of the composites were investigated. The modified composite material was extruded by twin screw to prepare a wire suitable for FDM type 3D printing. The results showed high content MNC could be mixed with PLA evenly without reducing the mechanical performance of the composite when MNC/PLA composite 3D printing wire was prepared by solution mixing method. 1%of KH550 （on over dried MNC） could effectively improve the interface compatibility of the composite．
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