Surface modification of carbon nanotubes with dendrimers or hyperbranched polymers

Abstract

The different methods for modification of carbon nanotubes with dendrimers or hyperbranched polymers are summarized, and recent development is highlighted by discussing some representative examples in detail.

Long‐Chain Hyperbranched Polymers: Synthesis, Properties, and Applications

“…Hyperbranched polymers (HBPs) are highly branched macromolecules, resembling dendrimers, with a 3D dendritic globular conformation . Both of HBPs and dendrimers have demonstrated several common characteristics when compared with linear ones, such as a high number of terminal functional groups, lower solution and melt viscosity, better solubility, and lack of chain entanglement.…”

“…Although excellent achievements have been made on HBPs, in contrast with linear polymers, the quite low viscosity and amorphous nature or high brittleness of HBP materials arising from their dendritic topologies with subchain lengths much shorter than the critical molecular weight for entanglement, give rise to poor processability and inferior mechanical properties, that are not possible for structural applications . Nevertheless, long‐chain hyperbranched polymers (LCHBPs), essentially the long‐chain analogs of HBPs with a linear long subchain segment between branching points, may combine the advantageous properties of HBPs and linear polymers, which may allow the formation of entanglements and also crystallinity like their linear segments, making them less brittle materials than their short‐chain analogs .…”

Spectroscopic studies on sidewall carboxylic acid functionalization of multi-walled carbon nanotubes with valine

“…Due to their exceptional combination of mechanical, thermal, chemical, and electronic properties, MWCNTs are considered as unique materials, with very promising future applications, especially in the field of nanotechnology, nanoelectronics, composite materials and as well as in medicinal chemistry [8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The researchers are still far from considering CNTs as entities easy to integrate into organic, inorganic, or biological systems.…”

Tribology Property of Benzoxazine–Bismaleimide Composites with Hyperbranched Polysilane-Grafted Multi-Walled Carbon Nanotubes

“…Hyperbranched polymer is a new type of polymer that has a highly branched, nonentangled architecture and active terminal groups, 18,19 leading to low viscosity and lower viscosity. [20][21][22] Hyperbranched polysiloxane (HPBSi) not only has the advantages mentioned above but also exhibits the advantages of polysiloxane, such as good thermal and moisture resistance. 23 Furthermore, the active terminal groups of hyperbranched polysilane (HBPSi) can react with the resin and the chemical bonds formed, 24 which are bene¯cial for providing preferable conditions for the homogeneous dispersion of MWCNTs and enhancing the interfacial strength with the matrix.…”