Functionalization of multiwalled carbon nanotubes with polystyrene under atom transfer radical polymerization conditions
Functionalization of multiwalled carbon nanotubes with polystyrene under atom transfer radical polymerization conditions
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DOI：
10.1016/j.carbon.2006.07.011
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发表时间：
2007
期刊：
影响因子：
10.9
通讯作者：
Huixia Wu;R. Tong;Xue-Qiong Qiu;Haifeng Yang;Yanghui Lin;R. Cai;S. Qian
中科院分区：
文献类型：
--
作者：
Huixia Wu;R. Tong;Xue-Qiong Qiu;Haifeng Yang;Yanghui Lin;R. Cai;S. Qian
将线型聚苯乙烯（PS）接枝到多壁碳纳米管（MWCNTs）的凸面上。以CuBr/2，2 ′-联吡啶为催化剂，采用原子转移自由基聚合（ATRP）方法合成了端溴聚苯乙烯（BPS），并在ATRP条件下将其直接与多壁碳纳米管（MWCNTs）反应。采用扫描电镜、透射电镜、红外光谱、拉曼光谱、核磁共振氢谱、紫外可见光谱、热重分析和X射线衍射等手段对接枝产物进行了表征。该产品可溶解于有机溶剂如1，2-二氯苯、四氢呋喃和氯仿中，形成分散良好的溶液。采用开孔z扫描技术在氯仿中测量了532 nm处的光限幅特性。结果表明，当聚合物共价连接到碳纳米管上时，样品保持了良好的光限幅性能。
Linear Polystyrene (PS) was grafted onto the convex surfaces of multiwalled carbon nanotubes (MWCNTs). Bromine-terminated polystyrene synthesized by atom transfer radical polymerization (ATRP) was directly reacted with MWCNTs under ATRP conditions using CuBr/2,2′-bipyridine as catalyst. The PS-grafted MWCNT samples were characterized by scanning electron microscopy, transmission electron microscopy, FT-IR spectra, Raman spectra,1H NMR, UV–vis spectra, thermal gravimetric analyses, and X-ray diffraction. The products can dissolve in organic solvents such as 1,2-dichlorobenzene, tetrahydrofuran and chloroform to form well-dispersed solutions. Optical limiting property measurements in chloroform were carried out at 532nm using the open-aperture z-scan technique. The results demonstrate that the samples preserve good optical limiting properties when the polymer is covalently attached to the carbon nanotube.