A new approach for the fabrication of an alternating multilayer film of poly(4‐vinylpyridine) and poly(acrylic acid) based on hydrogen bonding

Abstract

A new approach for the fabrication of a multilayer film assembly is explored, which is based on the alternating assembling of poly(4-vinylpyridine) and poly(acry1ic acid) via hydrogen bonding. The homogeneous multilayer films were characterized by UV-Vis, Xray diffraction and atomic force microscopy (AFM) measurements. The nature of interaction between the two polymers is identified as hydrogen bonding by IR spectroscopy.Organized molecular films, fabricated mainly by Langmuir-Blodgett method and self-assembling techniques, have various potential applications in molecular electronics, optical devices and biomedical applications'). Since Nuzzo and Allara showed the formation of self-assembled monolayers (SAMs) on gold, the field of S A M s has witnessed tremendous progress*. '). The driving force for this self-assembly is based on chemisorption of an active surfactant on a solid surface, e.g., the formation of gold thiolate resulting in SAMs of organosulfur compounds and the in-situ formation of polysiloxane directing SAMs of organosilicon derivatives. Based on coordination bonds between phosphate compounds and transition metal ions like Zr4', Mallouk discovered a new route to prepare simply self-assembled multilayers of diph~sphates~). Six years ago Decher et al. demonstrated the application of ionic attraction to construct multilayer polymer films? However, this assembling technique is developed far beyond in the polymer system, and a wide range of application is found such as in the assembly of nano particles, biomacromolecules and different functional supermolecules6). Very recently, Sagiv et al. successfully achieved selfreplicating amphiphilic monolayers7). Here we report a new approach for the fabrication of a multilayer film on the basis of hydrogen bonds.As it is well known, pyridine and carboxylic acid are good hydrogen bonding complementary partners. Frkchet et al. has built a new type of side-chain supramolecular liquid crystalline aggregates via intermolecular hydrogen bonding between pyridine and carboxylic acid". The complementary partners we used here are poly(4-vinylpyridine) and poly(acry1ic acid).

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

“…130 However, using other interactions to achieve LbL film construction can provide new triggers and specific architectures. The use of hydrogen-bonding to achieve LbL film construction was first reported in 1997 by Stockton et al and Wang et al 131,132 In both studies, FT-IR spectroscopy was used to prove the occurrence of hydrogen bonding. Since hydrogen bonding is reversible, pH-triggered dissolution of the multilayer was also demonstrated 133 rendering this LbL system extremely popular for controlled release from multilayer films and capsules.…”

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

“…For example, in the case of LbL assembly driven by electrostatic interactions, alternating layers of positively and negatively charged particles and/or (macro)molecules are deposited sequentially onto the underlying substrate, the latter obviously also undergoing surface charge-inversion in inverse alternating fashion [58]. Hydrogen bonding as a driving force to LbL self-assembly was investigated by Rubner et al [59] and Zhang et al [60,61]. The LbL technique based on biotin-avidin recognition was described by Osa [62,63].…”

Fabrication of Ultrathin Membrane via Layer-by-Layer Self-assembly Driven by Hydrophobic Interaction Towards High Separation Performance

“…Compared the spectrum of (GE/TA) 5.5 membrane with that of GE membrane, it appeared that the absorption peak of the carbonyl in amide bond shifted from 1630 cm −1 to 1650 cm −1 , verifying the existence of hydrogen bonds between gelatin and tannic acid. 43 To characterize the microstructure of (GE/TA) 5.5 and GE membranes, as well as establish the correlation between membrane microstructure and separation performance, the positron annihilation Doppler broadening energy spectra were obtained and described with S parameter as a function of positron energy. The S parameter is defined as the ratio of the photon annihilation count within the range of 510.24−511.76 keV to that within the range of 504.2−517.8 keV.…”