Preparation and properties of multi-walled carbon nanotube/poly(organophosphazene) composites
Preparation and properties of multi-walled carbon nanotube/poly(organophosphazene) composites
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DOI：
10.1007/s10853-012-6729-z
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发表时间：
2012
影响因子：
4.5
通讯作者：
Elif Okutan;Gulsah Aydin;Ferda Hacıvelioğlu;S. K. Beyaz;Serkan Yeşilot;A. KiliÇ
中科院分区：
文献类型：
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作者：
Elif Okutan;Gulsah Aydin;Ferda Hacıvelioğlu;S. K. Beyaz;Serkan Yeşilot;A. KiliÇ
碳纳米管以其独特的性能成为一种很有发展前途的材料。然而，碳纳米管在溶剂中的溶解度差限制了其功能，阻碍了其在许多领域的应用。用聚合物对碳纳米管进行表面改性是解决这一问题的有效方法。测试了几种聚合物用于碳纳米管分散体的制备。与有机聚合物相比，聚（有机磷腈）是高度稳定的大分子，其性质取决于侧基。本文描述了热稳定、可溶的多壁碳纳米管/聚有机磷腈复合材料的合成。合成了由(a) 100%季质子化吡啶氧基（PPY）、(b) 50%季质子化吡啶氧基和50%长脂肪链醇（1-十二醇）（PDK）和(c) 50%季质子化吡啶氧基和50%乙二醇醚[(2-（2-甲氧基乙氧基）乙醇]（PET）取代的聚有机磷腈。采用不同进料比[r进料= 1:1,1:3,1:5,1:10 (w:w)]对功能化多壁碳纳米管（f-MWCNT）与质子化聚磷腈（PPY， PDK和PET）进行处理，制备了f-MWCNT/聚有机磷腈复合材料。用热重分析仪研究了制备的f-MWCNT/PPY、f-MWCNT/PDK和f-MWCNT/PET复合材料的热稳定性。综合考虑复合材料的热稳定性和溶解度，选择f-MWCNT/PPY1:5、f-MWCNT/PDK1:5和f-MWCNT/ pet1:5作为最佳复合材料组成，并通过31p NMR、1H NMR、XRD、拉曼光谱和EDX分析对其进行了表征。利用HRTEM对f-MWCNT/PPY1:5、f-MWCNT/PDK1:5、f-MWCNT/ pet1:5纳米复合材料进行了形貌表征。纳米复合材料在水和常见的有机溶剂中具有良好的分散性。纳米复合材料的溶解度和热稳定性取决于聚有机磷腈的侧基。
Carbon nanotubes (CNTs) are promising materials because of their unique properties. However, the poor solubility in solvents limits the function of CNTs and hinders their applications in many fields. Surface modification of CNTs with polymers is an efficient method to solve this problem. Several polymers were tested for the preparation of CNT dispersions. In comparison with organic polymers, poly(organophosphazenes) are highly stable macromolecules with adjustable properties which depend on the side groups. This article is to describe the synthesis of thermally stable and soluble multi-walled CNT/poly(organophosphazene) composites. The poly(organophosphazene)s substituted with (a) 100 % quaternary protonated pyridinoxy (PPY), (b) 50 % quaternary protonated pyridinoxy and 50 % a long aliphatic chain alcohol (1-dodecanol) (PDK), and (c) 50 % quaternary protonated pyridinoxy and 50 % a glycol ether [(2-(2-methoxyethoxy)ethanol] (PET) have been synthesized.f-MWCNT/poly(organophosphazene) composites have been prepared by the treatment of the functionalized multi-walled carbon nanotubes (f-MWCNT) with the protonated polyphosphazenes (PPY, PDK, and PET) using different feed ratios [Rfeed= 1:1, 1:3, 1:5, 1:10 (w:w)]. The thermal stability of prepared composites (f-MWCNT/PPY,f-MWCNT/PDK, andf-MWCNT/PET) have been investigated by TGA. By considering thermal stabilities and solubility of all prepared composites,f-MWCNT/PPY1:5,f-MWCNT/PDK1:5, andf-MWCNT/PET1:5have been chosen as optimum composite composition and characterized by31P NMR,1H NMR, XRD, Raman spectroscopy, and EDX analysis. The morphologic characterizations of thef-MWCNT/PPY1:5,f-MWCNT/PDK1:5,f-MWCNT/PET1:5nanocomposites have been carried out by HRTEM. Excellent dispersions of the nanocomposites in water and common organic solvents have been achieved. The solubility and thermal stability of nanocomposites depend on the side groups on poly(organophosphazene).