Preparation of KH570-SiO2 and their modification on the MF/PVA composite membrane

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• 作者：Yingsong Zhou ; Junrong Yu ; Xuexin Wang ; Yan Wang ; Jing Zhu…
• 关键词：Nano SiO2 ; KH570 ; SiO2 ; Melamine ; formaldehyde/polyvinyl alcohol membrane ; Mechanical properties ; Thermal stability
• 刊名：Fibers and Polymers
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：16
• 期：8
• 页码：1772-1780
• 全文大小：1,269 KB
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• 作者单位：Yingsong Zhou (1)
  Junrong Yu (1)
  Xuexin Wang (1)
  Yan Wang (1)
  Jing Zhu (1)
  Zuming Hu (1)
  
  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  
• 出版者：The Korean Fiber Society
• ISSN：1875-0052

文摘

Melamine-formaldehyde/polyvinyl alcohol (MF/PVA) composite membranes modified by nano silica (SiO₂) and silane coupling agent KH570 modified SiO₂ (KH570-SiO₂) were prepared. The surface properties and morphology of KH570-SiO₂ were characterized using fourier transform infrared spectrometer (FTIR), thermogravimetric analysis (TGA), contact angle measurement instrument and X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) and particle size analyzer. The morphology and properties of nanoparticles modified MF/PVA membranes were also studied with scanning electron microscopy (SEM), TGA, dynamic mechanical analysis (DMA) and tensile tester. The results show that KH570 is grafted on the surface of nano SiO₂. KH570-SiO₂ has better dispersion in MF/PVA resin than that of unmodified SiO₂. The thermal stability, mechanical and crystallizing properties of MF/PVA membrane are increased after modified with nano SiO₂. KH570-SiO₂ makes MF more compatible with PVA resin, and further increases the mechanical properties and thermal stability of MF/PVA membrane. Keywords Nano SiO₂ KH570-SiO₂ Melamine-formaldehyde/polyvinyl alcohol membrane Mechanical properties Thermal stability