Preparation and properties of 3-aminopropyltriethoxysilane functionalized graphene/polyurethane nanocomposite coatings

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• 作者：Wenshi Ma (1)
  Li Wu (1)
  Dongqiao Zhang (1)
  Shuangfeng Wang (2)
  
• 关键词：Functionalized graphene ; Interaction ; Polyurethane nanocomposite coatings ; Mechanical and thermal properties
• 刊名：Colloid & Polymer Science
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：291
• 期：12
• 页码：2765-2773
• 全文大小：
• 作者单位：Wenshi Ma (1)
  Li Wu (1)
  Dongqiao Zhang (1)
  Shuangfeng Wang (2)
  
  1. College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, Guangdong, China
  2. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education, South China University of Technology, Guangzhou, 510640, Guangdong, China
  
• ISSN：1435-1536

文摘

Silicone-modified graphene was successfully synthesized by treating graphene oxide with 3-aminopropyltriethoxysilane (AMEO) and then reduced by hydrazine hydrate. Subsequently, the AMEO-functionalized graphene was incorporated into polyurethane (PU) matrix to prepare AMEO-functionalized graphene/PU nanocomposite coatings. The functionalized graphene could disperse homogenously by means of a covalent connection with PU. AMEO-functionalized graphene (AFG)-reinforced PU nanocomposite coatings showed more excellent mechanical and thermal properties than those of pure PU. A 227?% increase in tensile strength and a 71.7?% improvement of elongation at break were obtained by addition 0.2?wt% of AFG. Meanwhile, thermogravimetric analysis reveals that thermal degradation temperature was enhanced almost 50?? higher than that of neat PU, and differential scanning calorimetry analysis demonstrates that glass transition temperature decreased by around 9??. The thermal conductivity of AFG/PU nanocomposite coatings also increased by 40?% at low AFG loadings of 0.2?wt%.