Liquid crystalline polymers XVI*. Thermotropic liquid crystalline copoly(arylidene-ether)/TiO<sub>2</sub> Nanocomposites: synthesis, characterisation and applications

Aly, Kamal I.; Al‐Muaikel, Nayef S.; Abdelrahman, Mohamed; Tolba, Amal H.

doi:10.1080/02678292.2019.1597192

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…In this study, we address the synthesis and characterization of new polyurea derivatives containing diarylidenecyclohexanon moiety in the polymer and prepare the polymer nanocomposite using TiO 2 nanoparticles. TiO 2 is a commonly used material because it is inexpensive, is non-toxic, has a high refractive index, can be used as a broadband UV filter, is chemically inert, exhibits biological activity against bacteria via photo-irradiation, is corrosion-resistant, and has high rigidity [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites

Hussein

Alamry

Almehmadi

et al. 2020

Designed Monomers and Polymers

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A new series of polyurea derivatives and its nanocomposites were synthesised by the solution polycondensation method through the interaction between 4(2-aminothiazol-4-ylbenzylidene)-4-(tert-butyl) cyclohexanone and diisocyanate compound in pyridine. The PU 1-3 structure was confirmed using Fourier transform-infrared (FTIR) spectroscopy and characterised by solubility, viscometry, gel permeation chromatography (GPC), and X-ray diffraction (XRD) analysis. In addition, PU 1-3 was evaluated by TGA. Polyurea-TiO 2 nanocomposites were synthesised using the same technique as that of PU 1-3 by adding TiO 2 as a nanofiller. The thermal properties of PU 2 TiO 2 ad were evaluated by TGA. Moreover, the morphological properties of a selected sample were examined by SEM and TEM. In addition, PU 1-3 and PU 2 TiO 2 ad were examined for antimicrobial activity against certain bacteria and fungi. The PU 1-3 showed antibacterial activity against some of the tested bacteria and fungi, as did PU 2 TiO 2 ad , which increased with the increase in TiO 2 content. Furthermore, molecular docking studies were displayed against all PU 1-3 derivatives against two types of proteins. The results show that the increase in the strength of π-H interactions and H-donors contributed to improved binding of PU2 compared to PU1 andPU 3. The docking of 1KZN against the tested polymers suggests an increase in the docking score of PU 2, then PU 1 , and PU 3 , which is in agreement with the antibacterial study.

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Section: Introductionmentioning

confidence: 99%

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites

Hussein

Alamry

Almehmadi

et al. 2020

Designed Monomers and Polymers

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“…[61] Multiple transitions observed in LCPs are due to changes in the molecular orientation and the ordering of polymer chains. [62] These transitions can be divided into several categories, including transitions between isotropic and anisotropic phases. LCPs can transition between an isotropic liquid state and an anisotropic liquid crystal state.…”

Section: Temperature-responsive Polymer Systemsmentioning

confidence: 99%

“…This behavior is known as a re-entrant transition and is due to the competition between entropy and enthalpy. [62] The mechanisms of these transitions are complex and depend on various factors, including the chemical structure of the polymer, the strength of the intermolecular interactions, and external factors such as temperature, concentration, and pressure. Transitions in LCPs are governed by a combination of molecular ordering and mobility, and the exact behavior can vary depending on the specific LCP system.…”

Section: Temperature-responsive Polymer Systemsmentioning

confidence: 99%

“…Despite progress in the fabrication of liquid-crystalline polymer systems, only a limited literature describes their applications in biomedical studies. [62][63][64][65] Thermotropic nematics were used to amplify biological binding events, a field of research pioneered by Nicholas Abbott et al at the University of Wisconsin-Madison. [66][67] The key idea was to prepare a nematic phase with a particular alignment, either homogeneous (planar) or homeotropic (normal), at an interface with an aqueous phase.…”

Section: Temperature-responsive Polymer Systemsmentioning

confidence: 99%

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Switching it Up: The Promise of Stimuli‐Responsive Polymer Systems in Biomedical Science

Shymborska,

Budkowski,

Raczkowska

et al. 2023

The Chemical Record

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Responsive polymer systems have the ability to change properties or behavior in response to external stimuli. The properties of responsive polymer systems can be fine‐tuned by adjusting the stimuli, enabling tailored responses for specific applications. These systems have applications in drug delivery, biosensors, tissue engineering, and more, as their ability to adapt and respond to dynamic environments leads to improved performance. However, challenges such as synthesis complexity, sensitivity limitations, and manufacturing issues need to be addressed for successful implementation. In our review, we provide a comprehensive summary on stimuli‐responsive polymer systems, delving into the intricacies of their mechanisms and actions. Future developments should focus on precision medicine, multifunctionality, reversibility, bioinspired designs, and integration with advanced technologies, driving the dynamic growth of sensitive polymer systems in biomedical applications.

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Development and Characterization of Functionalized Titanium Dioxide-Reinforced Sulfonated Copolyimide (SPI/TiO2) Nanocomposite Membranes with Improved Mechanical, Thermal, and Electrochemical Properties

Ali

Said

Ali

et al. 2020

J Inorg Organomet Polym

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Liquid crystalline polymers XVI*. Thermotropic liquid crystalline copoly(arylidene-ether)/TiO₂ Nanocomposites: synthesis, characterisation and applications

Cited by 7 publications

References 44 publications

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites

Switching it Up: The Promise of Stimuli‐Responsive Polymer Systems in Biomedical Science

Development and Characterization of Functionalized Titanium Dioxide-Reinforced Sulfonated Copolyimide (SPI/TiO2) Nanocomposite Membranes with Improved Mechanical, Thermal, and Electrochemical Properties

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Liquid crystalline polymers XVI*. Thermotropic liquid crystalline copoly(arylidene-ether)/TiO2 Nanocomposites: synthesis, characterisation and applications

Cited by 7 publications

References 44 publications

Novel biologically active polyurea derivatives and its TiO2-doped nanocomposites

Novel biologically active polyurea derivatives and its TiO2-doped nanocomposites

Switching it Up: The Promise of Stimuli‐Responsive Polymer Systems in Biomedical Science

Development and Characterization of Functionalized Titanium Dioxide-Reinforced Sulfonated Copolyimide (SPI/TiO2) Nanocomposite Membranes with Improved Mechanical, Thermal, and Electrochemical Properties

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Liquid crystalline polymers XVI*. Thermotropic liquid crystalline copoly(arylidene-ether)/TiO₂ Nanocomposites: synthesis, characterisation and applications

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites

Novel biologically active polyurea derivatives and its TiO₂-doped nanocomposites