Hydrophobic Nanocontainers for Stimulus-Selective Release in Aqueous Environments

Staff, Roland H.; Gallei, Markus; Landfester, Katharina; Crespy, Daniel

doi:10.1021/ma501233y

Cited by 68 publications

(78 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, stimuli‐responsive block copolymers—commonly referred to as smart block copolymers—can be designed to alter conformation, solubility, or even covalent structure, as a function of external triggers. Common stimuli include temperature, pH, light, redox reagents, and electrical fields …”

Section: Introductionmentioning

confidence: 99%

“…Additionally, multi‐stimuli‐responsive block copolymers featuring a poly(2‐vinylpyridine) (P2VP)‐containing block segment were investigated in thin films, as micelles in water, and as smart nanocapsules. The latter have been advantageously used for the triggered release of different payloads from the capsules' interior . As another impressive example, PS‐ b ‐P4VP was the first polymer under investigation for creating integral asymmetric membranes with highly uniform pore sizes .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Polyvinylpyridine‐Grafted Block Copolymers by an Iterative All‐Anionic Polymerization Strategy

Appold

Rüttiger

Kuttich

et al. 2017

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

Common stimuli include temperature, pH, light, redox reagents, and electrical fields. [16][17][18][19][20][21][22][23] Block copolymers featuring polyvinylpyridine (PVP) segments have attracted enormous attention due to their ability to undergo microphase separation, metal ion complexation, nanoparticle complexation, as well as participate in hydrogen bonding. [24] Stamm and co-workers have reported extensively on poly(styrene-block-(4-vinylpyridine)) (PS-b-P4VP) as a system. For example, they have reported on the influence of hydrogen bonding for poly(styrene-block-(4-vinylpyridine)) (PS-b-P4VP) for microphase separation, [25] the use of sacrificial PS-b-P4VP networks as carbon precursors, [26] the use of PS-b-P4VP as polymer templates for the preparation of highly ordered arrays of metallic nanodots, [27] and the preparation of P4VP-based block copolymers for helically arranged nanoparticle complexation in cylindrical domains. [28] Besides their structure formation capabilities, PVPs have been used as pH-responsive homopolymers, or as reversibly addressable segments in smart block copolymer architectures featuring protonated pyridinium moieties. [16] For example, Li et al. reported on the pH responsiveness of Au@PVP particles, and their application as pHresponsive bimetallic catalysts. [29] Furthermore, responsive P4VP-based cross-linked films have been used as pH sensors and as surfaces with controllable surface wettability. [30] The group of Eisenberg has also reported on the morphological changes in PS-b-P4VP micelles as a function of pH range. [31] Additionally, multi-stimuli-responsive block copolymers featuring a poly(2-vinylpyridine) (P2VP)-containing block segment were investigated in thin films, [32] as micelles in water, [33,34] and as smart nanocapsules. The latter have been advantageously used for the triggered release of different payloads from the capsules' interior. [21,35] As another impressive example, PSb-P4VP was the first polymer under investigation for creating integral asymmetric membranes with highly uniform pore sizes. [36] The complexation of the P4VP block segments with copper(II) ions was utilized for a stabilization of the PS-b-P4VP micelles in solution and hence a high reproducibility of uniform pore structures was achieved. [37,38] Besides copper(II) salts, other transition metals like nickel(II), cobalt(II), and iron(II) are also capable of influencing the self-organization of Anionic PolymerizationsFunctional block copolymers are a highly relevant material platform for many potential applications in fields of nanolithography, drug delivery, and separation technologies. Here, poly(2-vinylpyridine) (P2VP)-grafted diblock copolymers consisting of polystyrene-block-polyisoprene (PS-b-PI) backbone are synthesized via an iterative anionic grafting-to polymerization strategy. P2VP macro anions having molar masses of 1.1, 3.6, and 9.9 kDa are grafted to PS-b-PI block copolymers featuring 37 mol% 1,2-polyisoprene moieties. Prior to the grafting-to strategy, the PS-b-PI is subjected to pl...

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyvinylpyridine‐Grafted Block Copolymers by an Iterative All‐Anionic Polymerization Strategy

Appold

Rüttiger

Kuttich

et al. 2017

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Multidimensional hierarchical self‐assembly of amphiphilic cylindrical micelles using a crystallizable poly(ferrocenyldimethylsilane) core‐forming block was reported by Manners and co‐workers . Ferrocene‐containing BCP nanocapsules were reported by Crespy and co‐workers . Patchy‐particle assembly via metal coordination was also explored .…”

Section: Introductionmentioning

confidence: 99%

Chelation‐Induced Polymer Structural Hierarchy/Complexity in Water

Han

Zhou

Zhu

et al. 2016

Macromol. Rapid Commun.

View full text Add to dashboard Cite

Understanding nanoscale structural hierarchy/complexity of hydrophilic flexible polymers is imperative because it can be viewed as an analogue to protein-alike superstructures. However, current understanding is still in infancy. Herein the first demonstration of nanoscale structural hierarchy/complexity via copper chelation-induced self-assembly (CCISA) is presented. Hierarchically-ordered colloidal networks and disks can be achieved by deliberate control of spacer length and solution pH. Dynamic light scattering, transmission electron microscopy, and atomic force microscopy demonstrate that CCISA underwent supramolecular-to-supracolloidal stepwise-growth mechanism, and underline amazing prospects to the hierarchically-ordered superstructures of hydrophilic flexible polymers in water.

show abstract

“…Materials based on ferrocenium/ferrocene have great potential applications in the fields of self‐healing materials, biosensors, organic compound recovery, redox‐responsive carriers and smart surfaces . Among the numerous ferrocene‐containing polymeric materials, linear random and block copolymers have been investigated extensively, whereas only a few reports have been focused on ferrocene‐based graft copolymers …”

Section: Introductionmentioning

confidence: 99%

Synthesis, self‐assembly and redox‐responsive properties of well‐defined hydroxypropylcellulose‐graft‐poly(2‐acryloyloxyethyl ferrocenecarboxylate) copolymers

Kang

Che

et al. 2015

Polymer International

View full text Add to dashboard Cite

Well‐defined amphiphilic graft copolymers, hydroxypropylcellulose‐graft‐poly(2‐acryloyloxyethyl ferrocenecarboxylate) (HPC‐g‐PAEFC), were synthesized via atom transfer radical polymerization. The graft copolymers contain hydrophilic thermo‐responsive HPC backbones and hydrophobic redox‐sensitive PAEFC side chains and can self‐assemble into spherical micelles in aqueous solution, with a hydrodynamic radius in the range 70–130 nm depending on length of the graft chains. The thermo‐responsive properties of the HPC‐g‐PAEFC copolymers in aqueous solution are gradually destroyed with increasing length of PAEFC side chains. The redox‐responsive behaviors of the graft copolymers were investigated with H2O2 and sodium ascorbate as oxidant and reductant, respectively, indicating an incompletely reversible redox‐triggered size transition. And the reversibility of the redox process becomes weaker gradually as the side chains are more difficult to be oxidized with an increase of the graft chains, which is evidenced from cyclic voltammetry measurements. The resultant HPC‐g‐PAEFC graft copolymers with the unique properties of ferrocene and cellulose provide prerequisites for amperometric biosensors and redox‐responsive drug delivery carriers. © 2015 Society of Chemical Industry

show abstract

Hydrophobic Nanocontainers for Stimulus-Selective Release in Aqueous Environments

Cited by 68 publications

References 56 publications

Polyvinylpyridine‐Grafted Block Copolymers by an Iterative All‐Anionic Polymerization Strategy

Polyvinylpyridine‐Grafted Block Copolymers by an Iterative All‐Anionic Polymerization Strategy

Chelation‐Induced Polymer Structural Hierarchy/Complexity in Water

Synthesis, self‐assembly and redox‐responsive properties of well‐defined hydroxypropylcellulose‐graft‐poly(2‐acryloyloxyethyl ferrocenecarboxylate) copolymers

Contact Info

Product

Resources

About