pH‐Responsive Nanoporous Silica Colloidal Membranes

Schepelina, Olga; Poth, Nils; Zharov, Ilya

doi:10.1002/adfm.201000369

Cited by 46 publications

(42 citation statements)

References 57 publications

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“…It is well known that poly(2‐(dimethylamino)ethyl methacrylate) (pDMAEMA) is widely used as a biomaterials double hydrophilic copolymer and environmentally sensitive coating due to its unique chemical structure containing–N(CH 3 ) 2 functional groups , which can be further quaternized or betainized . The literature reveals that the functional monomer 2‐(dimethylamino)ethyl methacrylate (DMAEMA) has been widely used to design stimuli‐responsive hydrogels, micelles, brushes, and other functional membranes grafted onto various substrates . In addition to their responsiveness to pH and temperature, DMAEMA‐based copolymers can also respond to external stimuli such as ion strength, selected ions and other factors in solution .…”

Section: Introductionmentioning

confidence: 99%

Preparation of 2‐(dimethylamino) ethyl methacrylate copolymer micelles for shape memory materials

Yang

Chen

et al. 2015

J of Applied Polymer Sci

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Researchers are actively developing shape memory polymers (SMPs) for smart biomaterials. This paper reports a new SMP system synthesized from biocompatible 2-(dimethylamino) ethyl methacrylate (DMAEMA), butyl acrylate (BA) and tri(ethylene glycol) divinyl ether (TDE). Preliminary results show that the DMAEMA-co-BA-co-TDE copolymers form micelles in aqueous solution due to chemical crosslinking and hydrophobicity. The micelle size decreased with the increase in the BA content since the hydrophobicity of copolymers increases with the increase of BA content. The resulting polymer films contain-N(CH 3 ) 2 functional groups for further biomaterial applications. The thermal stability of DMAEMA-co-BA-co-TDE copolymers is determined by the DMAEMA structure and content. Moreover, the copolymers form micro-phase-separated structures containing a reversible amorphous soft phase, and the storage moduli decreases significantly around T g . Therefore, good thermal-induced shape memory effects are achieved in the DMAEMA-co-BA-co-TDE copolymers by adjusting the BA content. This work proposes a new strategy for designing smart biomaterials using a biocompatible monomer.

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Section: Introductionmentioning

confidence: 99%

Preparation of 2‐(dimethylamino) ethyl methacrylate copolymer micelles for shape memory materials

Yang

Chen

et al. 2015

J of Applied Polymer Sci

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“…Environmentally stimuli‐responsive materials that undergo dynamic changes in response to diverse environmental signals have profound implications for both material science and engineering,1–4 such as, switchable surface wettability,5–6 special liquid‐solid adhesion,7–8 selective molecular permeability,9–11 and intelligent optical systems 12–13. Recently, combining these smart molecular materials with solid‐state nanofluidc channels or nanopores leads to a variety of functional nanofluidic devices,14–19 within which the charge and mass transportation are governed by the hydrophobic and electrostatic interactions, the chemical selectivity and the steric hindrance induced by the surface‐anchored chemical assemblies 20–22.…”

Section: Introductionmentioning

confidence: 99%

Integrating Ionic Gate and Rectifier Within One Solid‐State Nanopore via Modification with Dual‐Responsive Copolymer Brushes

Guo

Xia

Cao

et al. 2010

Adv Funct Materials

115

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A dual‐functional nanofluidic device is demonstrated that integrates the ionic gate and the ionic rectifier within one solid‐state nanopore. The functionalities are realized by fabricating temperature‐ and pH‐responsive poly(N‐isopropyl acrylamide‐co‐acrylic acid) brushes onto the wall of a cone‐shaped nanopore. At ca. 25 °C, the nanopore works on a low ion conducting state. When the temperature is raised to ca. 40 °C, the nanopore switches to a high ion conducting state. The closing/opening of the nanopore results from the temperature‐triggered conformational transition of the attached copolymer brushes. Independently, in neutral and basic solutions, the conical nanopore rectifies the ionic current. While in acid solutions, no ion rectifying properties can be found. The charge properties of the copolymer brushes, combined with the asymmetrical pore geometry, render the nanopore a pH‐tunable ionic rectifier. The chemical modification strategy could be applied to incorporate other stimuli‐responsive materials for designing smart multi‐functional nanofluidic systems resembling the “live” creatures in nature.

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“…This hybrid structure is in principle highly porous and does not hinder the molecular transport through the opal; however, above LCST the gel‐like polymer dehydrates and becomes impermeable to aqueous, solvated probes (negative gating). Exploiting this strategy centered on the design of responsive colloidal membranes with polymer membranes, the same group was able to fabricate proton conducting membranes using poly(3 sulfopropylmethacrylate) and poly(stryrenesulfonic acid) brushes,213 pH‐responsive opal‐like membranes using poly(2‐ (dimethylamino)ethyl methacrylate) (PDMAEMA)214 brushes and dual (thermo‐pH) responsive platforms using colloidal films modified with poly( L ‐alanine) brushes 215…”

Section: Practical Applications Of Polymer Brushesmentioning

confidence: 99%

Polymer brushes here, there, and everywhere: Recent advances in their practical applications and emerging opportunities in multiple research fields

Azzaroni

2012

J. Polym. Sci. A Polym. Chem.

371

337

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Bottom-up surface processing with well-defined polymeric structures becomes increasingly important in many current technologies. Polymer brushes, that is, assemblies of macromolecules tethered at one end to a substrate, provide an exemplary system of materials capable of achieving such a goal. While the focus in the past decades has been mostly on their synthetic aspects and the in-depth study of their interesting properties, from several years now the core area of research has already started to shift towards specific practical applications. Ample functional versatility and relative ease of preparation are special strengths of polymer brushes, lending them a strong interdisciplinary character. To this end, this work is entirely dedicated to bringing together the latest research on applications of polymer brushes in multiple research fields. The aim of this review are twofold: first, to give a critical discussion of the current status of development of application-oriented research on polymer brushes, and second, to inform the reader as to what can be done with polymer brushes in multiple research fields. It is therefore hoped that the juxtaposition of perspectives from different disciplines in one place will stimulate and contribute to the ongoing process of cross-fertilization that is driving this fascinating and emerging area of polymer science. V C 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 2012

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pH‐Responsive Nanoporous Silica Colloidal Membranes

Cited by 46 publications

References 57 publications

Preparation of 2‐(dimethylamino) ethyl methacrylate copolymer micelles for shape memory materials

Preparation of 2‐(dimethylamino) ethyl methacrylate copolymer micelles for shape memory materials

Integrating Ionic Gate and Rectifier Within One Solid‐State Nanopore via Modification with Dual‐Responsive Copolymer Brushes

Polymer brushes here, there, and everywhere: Recent advances in their practical applications and emerging opportunities in multiple research fields

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