The two weak peaks at 2θ around 30.0° and 36.2° are attributed to reflection

planes (210) and (020), respectively [27, 28]. In addition, there are several other weak reflection planes in the range of 38° to 60° [28]. The two crystalline characteristic peaks (110) and (200) remain unchanged after the incorporation of the N-MWNTs, indicating that the addition of the N-MWNTs did not affect the original crystal structure of the HDPE matrix. Figure 6 X-ray patterns of HDPE and HDPE/N-MWNTs. Conclusion A melt processing method has been used to prepare HDPE/N-MWNT EGFR activity nanocomposites with different filler loading percentages between 0.1, 0.4, 0.8, and 1.0 wt.%. The CNTs were dispersed into the host HDPE matrix by shearing action only of a pair of cylinder screws and then hot-pressed. HRTEM observations indicate that the N-MWNT product exhibits a bamboo shape with 97% purity and a high selectivity. The presence of N-MWNT in polymer matrix HDPE is clearly observed even at low loadings of N-MWNTs. The fraction of the crystalline phase was

determined from the normalized integrated intensity of the 1,418 cm-1 Raman band, which represents the orthorhombic crystalline phase in polyethylene. The XRD analysis demonstrated that the crystalline structure of HDPE matrix was not affected by the incorporation of the N-MWNTs. Acknowledgements The authors would like to thank Dr. Francisco C. Robles Hernandez at the University of Houston selleck chemicals llc College of Technology for taking the HRSEM pictures of the HDPE/MWCNT composites. References 1. Iijima S: Helical microtubules of graphitic carbon. Nature 1991, 354:56–58. 10.1038/354056a0CrossRef 2. Tans SJ, Devoret MH, Dai HJ, Thess A, Smalley RE, Geerligs LJ, Dekker C: Individual single-wall carbon nanotubes as quantum wires. Nature 1997, 386:474. 10.1038/386474a0CrossRef 3. Robertson

J: Realistic applications of CNTs. Mater Today 2004, 7:46–52. 10.1016/S1369-7021(04)00448-1CrossRef 4. Guadagno L, Vertuccio L, Sorrentino A, Raimondo 6-phosphogluconolactonase M, Naddeo C, Vittoria V, Iannuzzo G, Calvi E, Russo S: Mechanical and barrier properties of epoxy resin filled with multi-walled carbon nanotubes. Carbon 2009, 47:2419–2430. 10.1016/j.carbon.2009.04.035CrossRef 5. Thostenson E, Ren Z, Chou TW: Advances in the science and technology of carbon nanotubes and their composites. A review. Compos Sci Technol 2001, 61:1899–1912. 10.1016/S0266-3538(01)00094-XCrossRef 6. Hwang GL, Shieh YT, Hwang KC: Efficient load transfer to polymer grafted multi walled carbon nanotubes in polymer composites. Adv Funct Mater 2004, 14:487. 10.1002/adfm.200305382CrossRef 7. Schonhals A, Goering H, Costa FR, Wagenknecht U, Heinrich G: Dielectric properties of nanocomposites based on polyethylene and layered double hydroxide. Macromolecules 2009,42(12):4165–4174. 10.1021/ma900077wCrossRef 8.