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

Wang, Liyan; Wang, Zhiqiuang; Zhang, Xi; Shen, Jiacong; Chi, Lifeng; Fuchs, Harald

doi:10.1002/marc.1997.030180609

Cited by 385 publications

(292 citation statements)

References 17 publications

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“…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.…”

Section: History Of Layer-by-layermentioning

confidence: 99%

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

et al. 2013

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Materials fabrication with nanoscale structural precision based on bottom-up-type self-assembly has become more important in various current disciplines in chemistry including materials chemistry, organic chemistry, physical chemistry, analytical chemistry, biochemistry, colloid and surface chemistry, and supramolecular chemistry. Although the design of new materials based on nanoscale self-assembly is anticipated as a key concept, preparing complete three-dimensional structures at nanoscale precision remains a difficult target using current technologies. Rather, dimension-reduced approaches such as layering of two-dimensional nanostructures into precisely controlled lamellar nanomaterials are currently achievable. In particular, layer-by-layer (LbL) assembly is known as a highly versatile method for fabrication of controlled layered structures from various kinds of component materials using very simple, inexpensive, and rapid procedures. Therefore, fabrication of multilayer films through the LbL deposition process has attracted growing interest from various research communities. The high versatility and flexibility of LbL assembly is continuously creating new concepts, new materials, new procedures, and new applications. In this highlight review, we focus on nanoarchitectonics by LbL assembly. After an initial introduction on the invention and a brief history of the LbL assembly technique, innovations and the evolution of the technique are described based mainly on recent examples, which are categorized into two sections: (i) developments in methodology (technical, material, and phenomenological aspects with expansion of concept) and (ii) progress in applications (physical, chemical/biochemical, and biomedical applications).

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Section: History Of Layer-by-layermentioning

confidence: 99%

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

et al. 2013

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“…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].…”

Section: Assembly Of Nanoparticles Onto Prefabricated Larger Particlementioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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In this chapter, we will highlight conceptual physical approaches towards the fabrication of nanocomposite polymer latexes in which each individual latex particle contains one or more "hard" nanoparticles, such as clays, silicates, titanates, or other metal(oxides). By "physical approaches" we mean that the "hard" nanoparticles are added as pre-existing entities, and are not synthesized in situ as part of the nanocomposite polymer latex fabrication process. We will narrow our discussion to focus on physical methods that rely on the assembly of nanoparticles onto the latex particles after the latex particles have been formed, or its reciprocal analogue, the adhesion of polymer onto an inorganic nanoparticle. First, will discuss the phenomenon of heterocoagulation and its various driving forces, such as electrostatic interactions, the hydrophobic effect, and secondary molecular interactions. We will then address methods that involve assembly of nanoparticles onto or around the more liquid precursors (i.e., swollen/growing latex particles or monomer droplets). We will focus on the phenomenon of Pickering stabilization. We will then discuss features of particle interaction with soft interfaces, and see how the adhesion of particles onto emulsion droplets can be applied in suspension, miniemulsion, and emulsion polymerization. Finally, we will very briefly mention some interesting methods that make use of interface-driven templating for making well-defined assembled clusters and supracolloidal structures.

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“…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.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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

Zhao

Pan

et al. 2013

ACS Appl. Mater. Interfaces

103

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A novel and facile layer-by-layer (LbL) selfassembly process driven by hydrophobic interaction and then reinforced by hydrogen bond was developed to prepare ultrathin membranes. Gelatin (GE) and tannic acid (TA) were alternately deposited on polyacrylonitrile (PAN) ultrafiltration membranes to obtain GE/TA membranes. The required number of deposition cycles for acceptable permselectivity of membrane was greatly reduced compared with that of the traditional LbL self-assembly process and could be ascribed to the rapid growth of membrane thickness and the integrity of the innermost gelatin layer. Higher surface hydrophilicity and more appropriate free volume characteristics were obtained for GE/TA multilayer membranes compared with pristine gelatin membrane. Moreover, the GE/TA multilayer membrane exhibited improved stability even at high water content of 30 wt %. The membrane separation experiments with pervaporation dehydration of ethanol aqueous solution as a model system demonstrated the GE/TA multilayer membrane achieved higher water permselectivity than the pristine gelatin membrane. High operation stability was acquired in the long-term membrane separation test. KEYWORDS: gelatin/tannic acid, layer-by-layer self-assembly, hydrophobic interaction, hydrogen bond, ultrathin membranes ■ INTRODUCTIONAs a facile method to prepare ultrathin films with tunable thickness, composition, structure, and permeability, layer-bylayer (LbL) self-assembly has received considerable research attention and exhibited prospective applications in realms such as membrane-based separation, 1,2 drug delivery, 3,4 biosensors, 5 and microreactors. 6,7 The most deeply studied driving force for LbL self-assembly is the electrostatic interaction between oppositely charged species (mainly polyelectrolytes). 8,9 In each assembly step, a polyelectrolyte layer is adsorbed on the charged substrate and reverses the surface charge so that in the next assembly step a polyelectrolyte layer with opposite charge can be adsorbed.10 With the development of LbL self-assembly technique, diverse functions and properties are often demanded for multilayer films, which require a broader range of components beyond charged species. As a result, constructing multilayer films on the basis of non-electrostatic interactions such as hydrophobic interaction, 11 hydrogen bond, 12,13 and metal−ligand coordination 6,9 has gained more and more attention. 8 Hydrophobic interaction refers to the interaction formed between hydrophobic groups in an aqueous environment under enthalpy effect and entropy effect, which makes the hydrophobic groups cluster to reduce their exposure to water molecules. Several researches have been carried out to investigate the functions of hydrophobic interaction in LbL self-assembly.14−17 Based on the experimental data and theoretical models, Kotov 15 confirmed that hydrophobic interaction was one of the decisive factors for forming polyelectrolyte multilayers. Furthermore, hydrophobic interaction can promote the assembly of weak polye...

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

Cited by 385 publications

References 17 publications

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

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

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

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

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