An innovative synthesis approach toward the preparation of structurally defined multiresponsive polymer (co)networks

Achilleos, Mariliz; Demetriou, Maria; Marinică, Oana; Vékás, L.; Krasia‐Christoforou, Theodora

doi:10.1039/c4py00217b

Cited by 12 publications

(19 citation statements)

References 42 publications

(19 reference statements)

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“…The sol fraction percentage of the network prepared in the presence of PVP−Pd was comparable to that of the corresponding one obtained in the absence of the aforementioned (15 %) and similar to the sol fraction percentages of the previously reported polyDMAEMA/oleic acid‐coated Fe 3 O 4 nanocomposite networks prepared by employing the same synthetic strategy …”

Section: Resultssupporting

confidence: 87%

“…The fabrication of structurally‐defined Pd‐containing nanocomposite networks was realized in a single step upon mixing appropriate amounts of the well‐defined polyDMAEMA homopolymer and the PVP−Pd nanohybrid colloidal solution in methanol in the presence of 1,2‐bis(2‐iodo‐ethoxy)ethane (BIEE) (Figure ). The latter acts as a crosslinking agent owing to its ability to react selectively with two adjacent DMAEMA moieties that are present on the polyDMAEMA linear chains resulting in the formation of a stable network . A pristine BIEE‐crosslinked polyDMAEMA network was also prepared for comparison purposes.…”

Section: Resultsmentioning

confidence: 99%

“…The process invoked the crosslinking step at room temperature to limit nanoparticle agglomeration and required no inert atmosphere or mechanical stirring. Although the fabrication of magnetoactive and other types of organic‐inorganic polymer‐based networks has been reported in the past by us and other groups, to the best of our knowledge there are no other literature examples besides the ones reported by our group dealing with the fabrication of 3D polymer‐based nanocomposites exhibiting structurally defined architectures and containing pre‐formed, sterically‐stabilized and monodisperse inorganic nanofillers.…”

Section: Introductionmentioning

confidence: 89%

“…Recently, we described the versatile synthesis of structurally‐defined magnetoactive polymer‐based nanocomposite (co)networks via the encapsulation of pre‐formed surfactant‐stabilized magnetite (Fe 3 O 4 ) nanoparticles within 1,2‐bis(2‐iodoethoxy)ethane (BIEE)‐crosslinked (2‐dimethylamino)ethyl methacrylate (DMAEMA)‐containing polymer chains . The process invoked the crosslinking step at room temperature to limit nanoparticle agglomeration and required no inert atmosphere or mechanical stirring.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, we described the versatile synthesis of structurally-defined magnetoactive polymer-based nanocomposite (co) networks via the encapsulation of pre-formed surfactant-stabilized magnetite (Fe 3 O 4 ) nanoparticles within 1,2-bis(2-iodoethoxy)ethane (BIEE)-crosslinked (2-dimethylamino)ethyl methacrylate (DMAEMA)-containing polymer chains. [26] The process invoked the crosslinking step at room temperature to limit nanoparticle agglomeration and required no inert atmosphere or mechanical stirring. Although the fabrication of magnetoactive and other types of organic-inorganic polymer-based networks has been reported in the past by us [27,28] and other groups, [29][30][31] to the best of our knowledge there are no other literature examples besides the ones reported by our group [26,32] dealing with the fabrication of 3D polymer-based nanocomposites exhibiting structurally defined architectures and containing pre-formed, sterically-stabilized and monodisperse inorganic nanofillers.…”

Section: Introductionmentioning

confidence: 99%

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Structure-Defined 3D Nanocomposite Polymer Networks: Versatile Heterogeneous Catalytic Platforms in Organic Synthesis

et al. 2016

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Colloidal polyvinylpyrrolidone‐stabilized Pd nanoparticles were embedded within 1,2‐bis(2‐iodoethoxy)ethane (BIEE)‐crosslinked poly(2‐dimethylamino)ethyl methacrylate homopolymer networks with defined structural characteristics. In the presented synthetic approach, the crosslinking step is realised in ambient conditions, thus avoiding nanoparticle agglomeration phenomena. These 3D polymer‐based nanocomposite networks were evaluated as heterogeneous catalysts for Heck, Suzuki‐Miyaura and Sonogashira coupling reactions. High catalytic activity and reusability was demonstrated in Heck reactions, substrate‐specific outcomes were observed in Sonogashira couplings, while poor reactivity was observed in Suzuki‐Miyaura couplings. The existing diversity in material structure and composition allows for further improvements leading to highly stable and robust 3D polymer‐based nanocomposite heterogeneous catalysts that could find use in a wide range of transition metal‐catalysed organic reactions.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structure-Defined 3D Nanocomposite Polymer Networks: Versatile Heterogeneous Catalytic Platforms in Organic Synthesis

et al. 2016

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Poly(methacrylic acid)‐l‐Polyisobutylene Amphiphilic Conetworks by Using an Ethoxyethyl‐Protected Comonomer: Synthesis, Protecting Group Removal in the Cross‐Linked State, and Characterization

Kali

Iván

2015

Macro Chemistry & Physics

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A series of poly(methacrylic acid)-l -polyisobutylene anionic amphiphilic conetworks with hydrophobic polyisobutylene (PIB) content between 33% and 70% (w/w) is synthesized by the macromonomer method using a new approach by applying ethoxyethyl-protected methacrylic acid (EEMA) comonomer. To remove the protecting group after copolymerization of EEMA with PIB-dimethacrylate, acidic hydrolysis and thermal treatment are attempted, and the success of the deprotection is monitored by different techniques. Comparing the two protective group removal steps, it is found that, in contrast to homopolymers of EEMA, the acidic hydrolysis is more favorable than the thermal deprotection due to anhydride formation during the latter process in the conetworks. Distinct glass transitions are obtained by differential scanning calorimetry (DSC) indicating phase separation in the resulting conetworks. The swelling ability of the obtained conetworks in polar and nonpolar solvents proves the amphiphilic nature of these materials. Due to the polyacidic component of the conetworks, their water swollen gels have pH-sensitive, intelligent swelling behavior in aqueous media. Because of the relatively high stability of EEMA, the applied protection-deprotection strategy can be easily utilized in several other designed polymer syntheses. solvent and interact with both kinds of materials have recently received remarkable attention. [ 2 ] On the basis of their unique and unrivaled properties, a variety of synthetic and potential application-oriented research has been carried out with these new macromolecular assemblies in the last couple of years. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] Their biocompatibility, [4][5][6][7][8][9][10][11] mechanical strength, [ 15a-c ] nanophase-separated structure, [ 3 , 15a-c ] or even their amphiphilic nature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] can be separately important. In the case of APCNs, these properties are gathered together and these materials become incomparable with any other natural or formerly applied synthetic substances. The unique properties of APCNs have expanded their utility for life sciences, biomedicine, and G. Kali and B. Iván

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Tuning the Mechanical Properties of BIEE‐Crosslinked Semi‐Interpenetrating, Double‐Hydrophilic Hydrogels

Papaparaskeva

Voutouri

Gkretsi

et al. 2018

Macro Materials & Eng

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Double‐hydrophilic, semi‐interpenetrating (semi‐IPN) hydrogels are synthesized by encapsulating hydrophilic polyvinylpyrrolidone (PVP) linear chains in structure‐defined 1,2‐bis‐(2‐iodoethoxy)ethane (BIEE)‐crosslinked (poly(2‐(dimethylamino)ethyl methacrylate) (pDMAEMA) hydrogels. A series of semi‐IPN double‐hydrophilic hydrogels are prepared in which the pDMAEMA/BIEE content is kept the same and only the PVP content is varied, from 0 up to 33 wt%. The mechanical properties of the water‐swollen hydrogels are experimentally evaluated under unconfined compressive loading conditions, while a nonlinear hyperelastic constitutive equation is used to predict their mechanical response. No significant difference is found in the mechanical response of the semi‐IPN PVP/pDMAEMA/BIEE hydrogel containing 5 wt% PVP compared to the pDMAEMA/BIEE analog, however, for greater loading percentages (15 and 33 wt% of PVP), the semi‐IPN hydrogels exhibit less stiffness/higher ductility. Furthermore, in vitro biocompatibility studies are carried out for the pDMAEMA/BIEE and the semi‐IPN PVP/pDMAEMA/BIEE, indicating that both the formulations exhibit no toxicity in cultured cells.

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An innovative synthesis approach toward the preparation of structurally defined multiresponsive polymer (co)networks

Cited by 12 publications

References 42 publications

Structure-Defined 3D Nanocomposite Polymer Networks: Versatile Heterogeneous Catalytic Platforms in Organic Synthesis

Structure-Defined 3D Nanocomposite Polymer Networks: Versatile Heterogeneous Catalytic Platforms in Organic Synthesis

Poly(methacrylic acid)‐l‐Polyisobutylene Amphiphilic Conetworks by Using an Ethoxyethyl‐Protected Comonomer: Synthesis, Protecting Group Removal in the Cross‐Linked State, and Characterization

Tuning the Mechanical Properties of BIEE‐Crosslinked Semi‐Interpenetrating, Double‐Hydrophilic Hydrogels

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