Self photostabilizing UV-durable MWCNT/polymer nanocomposites

Directly‐Grown Hierarchical Carbon Nanotube@Polypyrrole Core–Shell Hybrid for High‐Performance Flexible Supercapacitors

“…Figure 4p resents the spectra of pure CNTs, PPy,a nd PPy/CNT-CC hybridsi nt he range of 600-2800 cm À1 .I nF igure 4a,t wo typical bands at around1 328 (D band) and 1563 cm À1 (G band) and as harp G'' band (around2 662 cm À1 )a re observed for the pure CNTs. [44] The Raman spectra of PPy/CNT-CC hybrids( see Figure 4c-e) exhibit, apart from the typical D and Gb ands of CNTs, severala dditional peaks at around 920, 989, 1043, and 1410 cm À1 ,w hich are characteristic peaks of PPy.The two peaks observed at 920 and 986 cm À1 are assigned to the ring deformation associatedw ith dications (bipolarons) and radical cations (polarons), respectively.F inally,t he band observeda t1 043 cm À1 is attributed to the CÀHi n-plane deformation and the peak at around 1410 cm À1 the CÀNs tretching mode of the pyrrole ring in the PPy/CNT composite. The Ramans pectrum of the surface-functionalized CNTs shows an increased D-band intensity and an I D /I G value increasedt o1 .25, indicating damage to the surfacewalls of CNTs or the formation of fragments caused by the surfacef unctionalization.…”

“…The Ramans pectrum of the surface-functionalized CNTs shows an increased D-band intensity and an I D /I G value increasedt o1 .25, indicating damage to the surfacewalls of CNTs or the formation of fragments caused by the surfacef unctionalization. [44] Additionally,t he I D /I G values of the PPy/CNT hybrids are 1.21, 1.18, and 1.22 for PPy/CNT-CC-300, PPy/CNT-CC-450, and PPy/CNT-CC-600, respectively.I nterestingly,t he smaller I D /I G value for all PPy/CNT-CC composites compared with that of the functionalized CNTsm ay be due to improved defectc oncentration on the surfaceo ft he CNTsa fter coating PPy uniformly on the CNT surface. [43] Additionally,adefect-induced D' band is observed at 1612 cm À1 as as houlder in the Gb and after acid functionalization.…”

Using matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry for the characterization of functionalized carbon nanotubes

“…More generally, we suppose the proposed approach can noticeably contribute to the analysis of f-MWCNTs where functionalizing molecules are polar species suitable for traditional MALDI methods. Stabilizers such as HALS and hindered phenols, [22][23][24] phosphonate-based additives, calixarenes, macromolecular systems, [25] b-cyclodextrin and peptides [17][18][19][20][21] could be well detected using the proposed approach, opening a new vista in the chemical characterization of f-MWCNTs.…”

Influence of functional nanoparticles on the photostability of polymer materials: Recent progress and further applications

“…The more walls and surface hydroxyl groups the CNTs possess, the higher antioxidant ability they have. Grafting HALS stabilizer onto MWNts [19] was reported to lead to UV-durable polymer nanocomposites with carbon nanotubes.…”