Hydrogen bonded multilayers of poly(2-ethyl-2-oxazoline) stabilized silver nanoparticles and tannic acid

Hendessi, Saman; Güner, Pınar Tatar; Mikó, Annamária; Demirel, A. Levent

doi:10.1016/j.eurpolymj.2016.10.039

Cited by 26 publications

(15 citation statements)

References 39 publications

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“…Not only are PAOx hydrogels attractive for delivery of small molecules, but they have also been used with silver ions for antimicrobial coatings. Demirel and co‐workers used different molar mass PEtOx hydrogen bonded with tannic acid in a layer‐by‐layer approach to encapsulate silver nanoparticles. Films up to 80 nm thick were achieved using the dip coating method, which degraded at high pH, releasing the silver.…”

Section: Emerging Applicationsmentioning

confidence: 99%

Poly(2‐oxazoline) Hydrogels: State‐of‐the‐Art and Emerging Applications

Dargaville

Park

Hoogenboom

2018

Macromolecular Bioscience

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The synthesis of poly(2-oxazoline)s has been known since the 1960s. In the last two decades, they have risen in popularity thanks to improvements in their synthesis and the realization of their potential in the biomedical field due to their "stealth" properties, stimuli responsiveness, and tailorable properties. Even though the bulk of the research to date has been on linear forms of the polymer, they are also of interest for creating network structures due to the relatively easy introduction of reactive functional groups during synthesis that can be cross-linked under a variety of conditions. This opinion article briefly reviews the history of poly(2-oxazoline)s and examines the in vivo data on soluble poly(2-oxazoline)s to date in an effort to predict how hydrogels may perform as implantable materials. This is followed by an overview of the most recent hydrogel synthesis methods and emerging applications, and is concluded with a section on the future directions predicted for these fascinating yet underutilized polymers.

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Section: Emerging Applicationsmentioning

confidence: 99%

Poly(2‐oxazoline) Hydrogels: State‐of‐the‐Art and Emerging Applications

Dargaville

Park

Hoogenboom

2018

Macromolecular Bioscience

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“…Additionally, the lower critical solution temperature (LCST) of hydrophilic POx can be tailored over a broad temperature range by means of the molar mass and composition adjustment, which is frequently required by diverse applications areas . Recently, POx and TA were also used to construct various multilayers …”

Section: Introductionmentioning

confidence: 99%

“…[30][31][32][33] Recently, POx and TA were also used to construct various multilayers. [34][35][36][37][38] Although pioneering strategies have gained success in the preparation of polymeric nanoparticles, the inefficient and tedious preparation techniques involved may limit their broad applications. Therefore, facile and efficient preparation strategy is demanded in view of the increasing significance of polymeric nanoparticles in diverse research fields.…”

mentioning

confidence: 99%

Thermoresponsive polymeric nanoparticles based on poly(2‐oxazoline)s and tannic acid

Wang

et al. 2018

J. Polym. Sci. Part A: Polym. Chem.

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Hydrogen bonding is widely present and plays a significant role in material science and supramolecular chemistry. This work reports a straightforward strategy for the preparation of polymeric nanoparticles from neutral poly(2‐oxazoline)s (POx) and tannic acid (TA) driven by their intermolecular hydrogen bonding. Dynamic light scattering (DLS) and scanning electron microscope (SEM) measurements showed that POx bearing different substituents, that is, methyl, ethyl and n‐propyl in the 2‐position all could assemble with TA into stable nanoparticles in water or ethanol. The diameter of the assembled nanoparticles could be manipulated by varying parameters such as molecular weight of POx, concentration and ratio of POx, and TA. Interestingly, POx/TA nanoparticles exhibited upper critical solution temperature (UCST)‐type thermoresponsive properties in ethanol or water depending on the molecular weight and substituent in the 2‐position of POx. Increasing or decreasing the temperature at the transition point resulted in the reversible transformation between assembled nanoparticles and disassembled poly(2‐n‐propyl‐2‐oxazoline) (PnPrOx) and TA. In view of the tailored size of the stable nanoparticles and the biocompatibilities of POx and TA, the prepared thermoresponsive nanoparticles are promising candidates as carriers for medicine toward related biomedical applications. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 1520–1527

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“…PETOX also contains amide groups linking the backbone and side chains, which are expected to contribute to better stabilization of Ag NPs [28]. In most papers, the complexes of silver nanoparticles with poly(2-oxazoline)s are received by the reduction of silver by low molecular weight agents [28,29]. In our investigation, the star-shaped molecule itself acts as a reduction agent.The present paper is aimed to investigate the interaction between AgNO 3 and star-PETOX (star-PIPOX) in aqueous solution.…”

mentioning

confidence: 89%

“…PETOX is a non-toxic and biocompatible polymer exhibiting lower critical solution temperature behavior with a critical temperature at 60 • C [24][25][26][27]. PETOX also contains amide groups linking the backbone and side chains, which are expected to contribute to better stabilization of Ag NPs [28]. In most papers, the complexes of silver nanoparticles with poly(2-oxazoline)s are received by the reduction of silver by low molecular weight agents [28,29].…”

mentioning

confidence: 99%

Star-Shaped Poly(2-ethyl-2-oxazoline) and Poly(2-isopropyl-2-oxazoline) with Central Thiacalix[4]Arene Fragments: Reduction and Stabilization of Silver Nanoparticles

et al. 2019

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The interaction of silver nitrate with star-shaped poly(2-ethyl-2-oxazoline) and poly(2-isopropyl-2-oxazoline) containing central thiacalix[4]arene cores, which proceeds under visible light in aqueous solutions at ambient temperature, was studied. It was found that this process led to the formation of stable colloidal solutions of silver nanoparticles. The kinetics of the formation of the nanoparticles was investigated by the observation of a time-dependent increase in the intensity of the plasmon resonance peak that is related to the nanoparticles and appears in the range of 400 to 700 nm. According to the data of electron and X-ray spectroscopy, scanning and transmission electron microscopy, X-ray diffraction analysis, and dynamic light scattering, the radius of the obtained silver nanoparticles is equal to 30 nm. In addition, the flow birefringence experiments showed that solutions of nanoparticles have high optical shear coefficients.

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Hydrogen bonded multilayers of poly(2-ethyl-2-oxazoline) stabilized silver nanoparticles and tannic acid

Cited by 26 publications

References 39 publications

Poly(2‐oxazoline) Hydrogels: State‐of‐the‐Art and Emerging Applications

Poly(2‐oxazoline) Hydrogels: State‐of‐the‐Art and Emerging Applications

Thermoresponsive polymeric nanoparticles based on poly(2‐oxazoline)s and tannic acid

Star-Shaped Poly(2-ethyl-2-oxazoline) and Poly(2-isopropyl-2-oxazoline) with Central Thiacalix[4]Arene Fragments: Reduction and Stabilization of Silver Nanoparticles

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