Preparation and characterization of 2‐hydroxyethyl methacrylate–chitosan functionalized multiwall carbon nanotubes nanocomposites

Abstract

Surface of chitosan (CS) functionalized multiwall carbon nanotubes (MWCNTs) was modified by using 2‐hydroxyethyl methacrylate (HEMA) monomers and the composites were synthesized under microwave irradiation. In this approach, multiwalled carbon nanotubes were functionalized with HEMA and CS in two steps. Firstly, CS was grafted onto the surface and side wall of carbon nanotubes by using microwave irradiation. At the second step, HEMA monomers were grafted onto the polymeric matrix surface. The modified surface of CS functionalized multi‐walled carbon nanotube composites are confirmed by Fourier transform infrared spectroscopy. Moreover, Transmission electron microscopic and scanning electron microscopic images show the morphological changes of the carbon nanotubes. Thermal gravimetric analysis shows content of HEMA–CS functionalized MWCNTs in the composites. Dispersibility of pristine MWCNTs was compared with dispersibility of resultant composites in aqueous phase as well. Results show that composites have higher dispersibility in aqueous phase. Considering the biomedical importance of HEMA monomers and CS polymer, in future, these materials are expected to be useful in the pharmaceutical industry as novel biomaterials composites with potential applications in drug delivery. POLYM. COMPOS., 35:495–500, 2014. © 2013 Society of Plastics Engineers

Single‐wall carbon nanotubes‐chitosan nanocomposites: Surface wettability, mechanical and thermal properties

“…Fourier‐transform infrared spectra of functionalized single‐walled carbon nanotubes, chitosan and nanocomposite films confirmed the functionalization of the nanofiller and the conservation of chitosan structure after incorporation of single‐walled carbon nanotubes into the polymeric matrix, Figure 3. functionalized single‐walled carbon nanotubes spectra showed low intensity bands at 1719 and 3300 cm −1 , respectively, related to the carboxyl and hydroxyl groups, which evidence the effective functionalization of single‐walled carbon nanotubes, while the band at 1575 cm −1 is related to the aromatic C=C bond stretching [21], Figure 3a. The chitosan spectrum showed the absorption bands characteristics of amides I and II at 1655 and 1560 cm −1 , respectively; −C−H banding at 1409 cm −1 ; C−O and C−O−C stretching vibrations at 1153, 1094 and 1026 cm −1 , corresponding to the saccharide structure of chitosan; and O−H stretching at 3350 cm −1 , Figure 3b.…”

Suitability of Chitosan Scaffolds with Carbon Nanotubes for Bone Defects Treated with Photobiomodulation

“…Additionally, -C-H banding at 1409 cm −1 ; C-O and C-O-C stretching vibrations at 1153, 1094 and 1026 cm −1 , corresponding to the saccharide structure of chitosan. A typical band at 1716 cm −1 is attributed to the carboxyl groups, which evidence the effective functionalization of the carbon nanotubes, while the additional observed band at 1579 cm −1 is related to the aromatic C=C bond stretching of its structure, as indicated by the arrows ( Figure 1 b) [ 30 ].…”

Comparison studies on covalently and non‐covalently modified MWNTs using chitosan and their starch nanocomposites

“…Rich of hydrophobic and hydrophilic groups, CS can be adsorbed onto MWNTs surfaces via hydrophobic interactions, hydrogen bonding, and so on. The absorbed CS chains make MWNTs hydrophilic and easy to be dispersed . Aroon et al found that CS‐wrapped MWNTs were well dispersed in polyimide matrix and effectively improved the CO 2 /CH 4 separation performance of the composite films.…”