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Gelation of Polyisocyanurate Xerogel Composites Induced by Silver Nanoparticles and Their Electrospun Fibers with Biocompatible and Antibacterial Properties for Biomedical Applications.
Langmuir
January 2025
Electroplating Metal Finishing Division, CSIR-Central Electrochemical Research Institute, Karaikudi, 630003 TamilNadu, India.
We report the in situ synthesis of silver-containing polyisocyanurate (Ag-PI) gels via the self-polymerization of isocyanate-containing organic molecules (Desmodur N75) catalyzed by silver nitrate (AgNO) in ,'-dimethylformamide, which acts as both the solvent and reducing agent. Fourier transform infrared spectroscopy and X-ray diffraction confirmed the formation of polyisocyanurate and metallic silver nanoparticles. Gelation occurred in 30 min at 30 °C for Ag-PI, compared to 24 h for the uncatalyzed system, demonstrating AgNO's catalytic role.
View Article and Find Full Text PDFStereoselective Interactions of Chiral Polyurea Nanocapsules with Albumins.
ACS Appl Mater Interfaces
October 2024
The Institute for Drug Research, the School of Pharmacy, the Faculty of Medicine, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 9112192, Israel.
Exploiting the chirality of nanometric structures to modulate biological systems is an emerging and compelling area of research. In this study, we reveal that chiral polyurea nanocapsules exhibit significant stereoselective interactions with albumins from various sources despite their nearly neutral surface potential. Moreover, these interactions can be modulated by altering the nanocapsule surface composition, offering new opportunities to impact their distribution and, if used as a drug delivery system, the pharmacokinetics of the drug.
View Article and Find Full Text PDFA Nanoencapsulated Ir(III)-Phthalocyanine Conjugate as a Promising Photodynamic Therapy Anticancer Agent.
ACS Appl Mater Interfaces
July 2024
Departament de Química Inorgànica i Orgànica, Secció de Química Orgànica, Universitat de Barcelona (UB), and Institut de Biomedicina de la Universitat de Barcelona (IBUB), Martí i Franquès 1-11, E-08028 Barcelona, Spain.
Article Synopsis
- The text discusses the challenges in developing effective photosensitizers for photodynamic therapy (PDT) in cancer treatment, focusing on the necessity of finding stable molecules that can operate with long-wavelength light.
- Researchers introduce a novel Ir(III)-phthalocyanine conjugate as a promising photosensitizer, utilizing its photostability and high phototoxicity with near-infrared light for more efficient PDT.
- The study shows that encapsulating this conjugate in specialized nanocapsules enhances its water solubility and effectiveness, achieving significant cancer cell growth inhibition even in low-oxygen conditions, paving the way for more reliable cancer treatment options.
pH-Responsive Charge Convertible Hyperbranched Poly(ionic liquid) Nanoassembly with High Biocompatibility for Resistance-Free Antimicrobial Applications.
Nano Lett
June 2024
School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong 518107, People's Republic of China.
As a potential alternative to antibiotics, hyperbranched poly(ionic liquid)s (HPILs) have demonstrated significant potential in combating bacterial biofilms. However, their high cation density poses a high risk of toxicity, greatly limiting their applications. In this study, we constructed a biocompatible HPIL (HPIL-Glu) from a hyperbranched polyurea core with modified terminals featuring charge-convertible ionic liquids.
View Article and Find Full Text PDFEnhancing Dental Material Performance: Tung Oil-Infused Polyurea Microcapsule Coatings for Self-Healing and Antimicrobial Applications.
Polymers (Basel)
March 2024
School of Civil and Environmental Engineering, University of Auckland, Auckland 1010, New Zealand.
Within the realm of dental material innovation, this study pioneers the incorporation of tung oil into polyurea coatings, setting a new precedent for enhancing self-healing functionality and durability. Originating from an ancient practice, tung oil is distinguished by its outstanding water resistance and microbial barrier efficacy. By synergizing it with polyurea, we developed coatings that unite mechanical strength with biological compatibility.
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