Controlled dispersion of multiwalled carbon nanotubes modified by hyperbranched polylysine

Abstract

Hyperbranched polymers have been found effective in controlling the dispersibility of carbon nanotubes in aqueous solutions. In this study, hyperbranched polylysine (HBPL) was synthesized using lysine and N,N′‐methylenebisacrylamide as precursors via Michael addition. The HBPL then was used to noncovalently modify multiwalled carbon nanotubes (MWCNTs) to prepare MWCNTs‐HBPL. The obtained MWCNTs‐HBPL composites were characterized using FTIR spectroscopy, Raman spectroscopy, thermogravimetric analysis, and scanning electron microscopy. The results showed that the HBPL was successfully attached to the surface of MWCNTs via noncovalent interactions. The dispersibility of the MWCNTs‐HBPL composites in aqueous solutions was investigated using digital photographs, ultraviolet–visible absorption spectroscopy, and zeta potential measurements. The results demonstrated that both the mass ratio of MWCNT to HBPL and the pH of the solution had a significant impact on the dispersibility of the MWCNTs/HBPL solution, suggesting that HBPL treatment is an effective method of controlling the dispersibility of MWCNTs in aqueous solutions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46249.

Essential Oils-Loaded Electrospun Biopolymers: A Future Perspective for Active Food Packaging

“…To address this issue ionic gelation was applied to adsorb cationic biopolymers onto the surface of TEO/ β-CD-IC [157]. In the study, ε-polylysine (ε-PLY), a biodegradable cationic biological metabolite with outstanding antibacterial properties, was selected to prepare TEO/β-CD ε-polylysine nanoparticles (TCPNs) [158]. e presence of -NH 2 along the ε-PLY chains improves nanoparticle binding onto negatively charged bacterial cell wall leading to an acceleration in the apoptosis process [159].…”

Investigation on the Properties of Multiwall Carbon Nanotube‐, Graphene‐, and Fullerene‐Reinforced Hot‐Extruded AA7075 Matrix Composites

“…According to [20,21], the semipowder method can be used to make graphene-reinforced aluminium matrix compounds. The inclusion of graphene increased the yield and tensile strength, and this was reported in [22]. As with carbon nanotubes and graphene, fullerenes can be used in metal matrix composites to increase their mechanical properties [23].…”

Prospects of Polymeric Nanofibers Loaded with Essential Oils for Biomedical and Food-Packaging Applications

“…In this regard, Lin et al prepared antibacterial nanofibers while encapsulating TEO/β-cyclodextrin (β-CD) ε-poly-L-lysine (ε-PLY) (TCPNs) nanoparticles into a gelatin (GEL) polymer using the electrospinning method [ 119 ]. The results from this study were that TCPNs containing GEL nanofibers exhibited excellent antibacterial activity against Campylobacter jejuni due to the presence of ε-PLY and encapsulation of TEO [ 121 , 122 ]. These disrupt the biological membranes and cause essential protein leakage from the bacteria, the vital substance supporting the viability [ 123 ].…”