Assembly of Nanotubes of Poly(4‐vinylpyridine) and Poly(acrylic acid) through Hydrogen Bonding

Abstract

Nanotubes of poly(4-vinylpyridine) (PVP) and poly(acrylic acid) (PAA) were fabricated by hydrogen bonding based on layer-by-layer (LbL) assembly. The uniform and flexible tubular structures were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). FTIR and X-ray photoelectron spectroscopy (XPS) measurements confirm the formation of hydrogen bonds in the assembled nanotubes. PAA can be released from the assembled PAA/PVP nanotubes in a basic aqueous solution to give the walls of the tubes a porous structure. Such assembled nanotubes can be considered as carriers for catalysts or drugs, especially in aqueous solution against capillary force.

Supramolecular Organization of Polymeric Materials in Nanoporous Hard Templates

“…For example, the formation of hydrogen bonds between hydroxyl groups of poly(acrylic acid) and the nitrogen groups of poly(4-vinylpyridine) was exploited to coat the pore walls of PC membranes with multilayer structures consisting of these polyelectrolytes [246]. An advantage of this approach lies in the fact that solutions in organic solvents can be used to deposit the monolayers.…”

Enzyme-Encapsulated Layer-by-Layer Assemblies: Current Status and Challenges Toward Ultimate Nanodevices

“…Sequential assembly of polymers within a controlled pore followed by template removal can result in self-standing tubular structures. Li et al reported fabrication of microtubes based on hydrogen-bonding LbL self-assembly from poly(acrylic acid) (PAA) and PVP [226]. They also demonstrated successful removal of the PAA and the resulting porous walled tubes could also be useful as carriers in drug delivery or as catalyst supports.…”

Layer‐by‐Layer Assembled Nanotubes as Biomimetic Nanoreactors for Calcium Carbonate Deposition

“…[22][23][24][25] These LbL-assembled composite nanotubes have been fabricated by applying a variety of assembly components including natural or synthetic polyelectrolytes, inorganic nanoparticles, dyes, dendrimers, peptides, DNA, and enzymes. The driving force for multilayer assembly has also been extended from the electrostatic interactions of the polymer chains to other non-electrostatic interactions including hydrogen bonding, [26] DNA hybridization, [27] and covalent bonding. [28] Therefore, the availability of a wide-range of organic or inorganic components, the variety of interactions, and the versatility in assembly approaches spectacularly enables one to introduce a high degree of multifunctionality within these LbL-assembled nanotubes.…”