Efficient functionalization of multi‐walled carbon nanotubes with p‐aminophenol and their application in the fabrication of poly(amide‐imide)‐matrix composites

Abstract

The ultrasonically‐assisted fabrication of poly(amide‐imide) composites containing isoleucine amino acid and multi‐walled carbon nanotubes functionalized with p‐aminophenol is reported. The properties of the composites were studied using various techniques.

One-dimensional nitrogen-containing carbon nanostructures

“…MWCNTs covalently grafted with hydroxyl modified phosphazene were introduced into ethylene-vinyl acetate copolymer via melt blending [509] which enhanced the thermal stability and flame retardancy of ethylenevinyl acetate. Epoxy resins were successfully reinforced using MWNCNTs [510], triazolefunctionalized stacked-cup CNFs [570] and aminosilane-functionalized CNTs [375] while the same was achieved for p-aminophenol functionalized MWCNTs in the case of poly(amide-imide) [395] and poly(methyl methacrylate) using NCNFs [586].…”

“…[394]. MWCNTs were surface-modified with paminophenol under microwave irradiation in order to improve the dispersion in and compatibility with the polymer matrix [395]. The process is fast, one-pot, easy and results in a high degree of functionalization as well as dispersibility in organic solvents.…”

“…Poly(amide-imide) composites containing p-aminophenol-functionalized MWCNTs were prepared using ultrasound-assisted method [395]. The aromatic-aliphatic polyamide/amide-amine-functionalized CNT nanocomposites were synthesized by using in situ polycondensation [393].…”

Improved covalent functionalization of multi-walled carbon nanotubes using ascorbic acid for poly(amide–imide) composites having dopamine linkages

“…The reaction pathway is shown in figure 2. According to previous literature, the aformentioned weight percents were selected [21][22][23][24][25]. The introduction of several functional groups as well as dopamine and amino acid bulky substituents resulted in increased chain packing distances and decreased intermolecular interactions, leading to better interaction of the PAI chains with MWCNTs-AS and better dispersion of MWCNTs-AS in the PAI matrix.…”

Microwave assisted functionalization of carboxylated‐multiwalled carbon nanotubes with 5‐aminoisophthalic acid and its application for the preparation of chiral poly(ester‐imide)/CNT nanocomposites

“…Currently, various chemical and physical techniques are used to conquer the difficulty of aggregation and efficient dispersion of the CNTs in polymer matrices. Chemical functionalization offers an important tool to achieve an adequate interfacial adhesion to get advantage of the remarkable properties that CNTs can provide .…”