基于增塑淀粉和碳纳米管的复合材料。
The composites based on plasticized starch and carbon nanotubes.
机构信息
School of Science, Tianjin University, Tianjin 300072, China.
出版信息
Int J Biol Macromol. 2013 Aug;59:13-9. doi: 10.1016/j.ijbiomac.2013.04.010. Epub 2013 Apr 12.
In this study, the nanocomposite films based on plasticized starch and modified-carbon nanotubes were prepared using a simple casting method. Carbon nanotubes (CNTs) were oxidized to prepare CNT oxide (OCNT) by Hummer's method, and OCNTs were reduced by glucose to obtain reduced CNT (RCNT). The thermogravimetric (TG) curves revealed that OCNTs and RCNTs contained about 15 and 8wt% oxygen-containing groups, respectively. The UV-vis spectra proved that CNTs with the aid of the dispersant TNWDIS, OCNTs and RCNTs possessed the good stability in water. As the fillers, CNTs, OCNTs and RCNTs were introduced into plasticized-starch (PS) matrix to obtain the composites. They had the obvious reinforcing effect on PS matrix. The composites containing 4wt% RCNT had the maximum tensile strength of 19.5MPa, in contrast to 3.89MPa of PS. Among of them, PS/CNT composites showed the best moisture resistance. And the PS-based CNT, OCNT and RCNT composites exhibited approximate electrical conductivities.
在这项研究中，采用简单的浇铸法制备了基于增塑淀粉和改性碳纳米管的纳米复合薄膜。通过 Hummer 法将碳纳米管（CNT）氧化为 CNT 氧化物（OCNT），并通过葡萄糖将 OCNT 还原为还原的 CNT（RCNT）。热重（TG）曲线表明，OCNTs 和 RCNTs 分别含有约 15wt%和 8wt%的含氧基团。紫外-可见（UV-vis）光谱证明，在分散剂 TNWDIS 的辅助下，CNTs、OCNTs 和 RCNTs 在水中具有良好的稳定性。作为填充剂，将 CNTs、OCNTs 和 RCNTs 引入到增塑淀粉（PS）基体中，得到复合材料。它们对 PS 基体具有明显的增强作用。含有 4wt%RCNT 的复合材料的拉伸强度最大，达到 19.5MPa，而 PS 的拉伸强度为 3.89MPa。其中，PS/CNT 复合材料具有最好的耐湿性。而基于 PS 的 CNT、OCNT 和 RCNT 复合材料表现出近似的电导率。
Zotero 插件