80电影天堂网,少妇高潮一区二区三区99,jαpαnesehd熟女熟妇伦,无码人妻精品一区二区蜜桃网站

相關(guān)鏈接
聯(lián)系方式
  • 通信地址:上海市松江區(qū)人民北路2999號 東華大學(xué)材料學(xué)院
  • 郵編:201620
  • 電話:86-21-55664197
  • 傳真:
  • Email:txliu@fudan.edu.cn
當(dāng)前位置:> 首頁 > 論文著作 > 正文
149. Water dispersible graphene noncovalently functionalized with tryptophan and its poly(vinyl alcohol) nanocomposite.
作者:J. Guo, L. L. Ren, R. Y. Wang, C. Zhang, Y. Yang, T. X. Liu*
關(guān)鍵字:Polymer-matrix composites (PMCs), Particle-reinforcement, Mechanical properties, Physical properties, Graphene
論文來源:期刊
具體來源:Composites Part B, 2011, 42(8), 2130-2135.
發(fā)表時間:2011年

Graphene sheets functionalized noncovalently with aromatic amino acid, tryptophan (Tryp), were prepared by reducing graphene oxide through hydrazine hydrate. Tryp-functionalized graphene is water dispersible and can be stabilized for several months. Atomic force microscopy (AFM), X-ray diffraction (XRD), UV–vis absorption and Raman spectroscopy were used to investigate the nanostructures and the properties of graphene. Application of the graphene dispersion to poly(vinyl alcohol) (PVA) with the help of tryptophan to prepare nanocomposite was also carried out. And the PVA/graphene nanocomposite was characterized by thermogravimetric analysis (TGA) and tensile testing. A 23% improvement in tensile strength and moderate increases in Young’s modulus and thermal stability for PVA were achieved by adding only 0.2 wt% graphene sheets.