Preparation and enhanced mechanical properties of non-covalently-functionalized graphene oxide/cellulose acetate nanocomposites

Incorporating graphene oxide into biomimetic nano-microfibrous cellulose scaffolds for enhanced breast cancer cell behavior

“…Powdery GO exhibits the characteristic peaks at 3432, 1723, 1630, and 1096 cm -1 for O-H stretching, C = O stretching vibration, and C = C stretching, C-O-C stretching vibration, respectively (Shao et al 2016). CA shows O-H stretching at 3491 cm -1 , -CH 2 asymmetric stretching at 2894 cm -1 , C-O-C stretching at 1052 cm -1 (Uddin et al 2016;Liu and Hsieh 2002), and C = O in-plane stretching vibration at 1740 cm -1 which is an indication of the formation of ester group as a result of acetylation reaction (Kabiri and Namazi 2014). As expected, characteristic peaks at 3348, 2890, and 1061 cm -1 are observed in the spectrum of BC, which correspond to -OH bonds, asymmetric stretching vibration of C-H, and antisymmetric bridge stretching of C-O-C, respectively.…”

Cellulose Acetate/Magnetic Graphene Nanofiber in Enhanced Human Mesenchymal Stem Cells Osteogenic Differentiation Under Alternative Current Magnetic Field

“…32 Incorporation of the rGO/Co nanocomposite improves the crystalline structure of CA while it acts as a heterogeneous nucleation point. 33,34 The characteristic peak intensity at 21.4 is not changed via adding nanocomposite, which is attributed to the well-dispersion of rGO/Co and the proper percentage of nanocomposite loading inside the CA polymer. 33 Figure 3(b) shows the FTIR of CA and rGO/Co/ CA nano¯ber.…”

“…33,34 The characteristic peak intensity at 21.4 is not changed via adding nanocomposite, which is attributed to the well-dispersion of rGO/Co and the proper percentage of nanocomposite loading inside the CA polymer. 33 Figure 3(b) shows the FTIR of CA and rGO/Co/ CA nano¯ber. The CA typical characteristic peaks are placed at 1048, 1166, 1234, 1376.88, 1433, 1748.20 cm À1 , which are assigned to the asymmetric C-O-C bond stretching from the pyranose, ring C-O-C glycosidic linkage, alkoxyl stretch of the ester, symmetric and antisymmetric bending of methyl groups (-CH 3 ) for groups of the acetate substituent and the C¼O stretching from the acetyl groups, respectively.…”

Controllable synthesis of biomimetic nano/submicro-fibrous tubes for potential small-diameter vascular grafts

“…33 In the FTIR spectrum of CA, O-H stretching at 3491 cm À1 , -CH 2 asymmetric stretching at 2894 cm À1 , C-O-C stretching at 1052 cm À1 are noted. 34,35 The FTIR spectrum of CA also shows O-H stretching at 3491 cm À1 , -CH 2 asymmetric stretching at 2894 cm À1 , and C-O-C stretching at 1052 cm À1 . 34,35 These peaks are also seen in the spectra of BC/CA materials.…”

“…34,35 The FTIR spectrum of CA also shows O-H stretching at 3491 cm À1 , -CH 2 asymmetric stretching at 2894 cm À1 , and C-O-C stretching at 1052 cm À1 . 34,35 These peaks are also seen in the spectra of BC/CA materials. Note that the CQO in-plane stretching vibration at 1740 cm À1 is also observed in the spectrum of CA, which indicates the formation of ester group as a result of acetylation reaction.…”