Optimizing β-Phase Content in PVDF Membranes via Modification of Dope Solution with Citric Acid/Nano-TiO2 Using Nonsolvent-Induced Phase Separation Method

Polymers, Journal Year: 2025, Volume and Issue: 17(4), P. 481 - 481

Published: Feb. 12, 2025

The morphology of Poly (vinylidene fluoride) (PVDF) membranes prepared via the nonsolvent-induced phase separation (NIPS) method was modulated by altering dope solution with citric acid (CA) and titanium dioxide nanoparticles (nano-TiO2) to optimize β-phase content. Three series solutions were in dimethyl acetamide (DMAc): (i) TONx contained 0.0-10% acid, (ii) Mx 0.0-0.4% nano-TiO2, (iii) TAx 5% CA 0.0-0.40% nano-TiO2. A field emission scanning electron microscopy (FESEM) study revealed that enhances pore opening, nano-TiO2 transforms sponge-like uneven porous structures into a compact, relatively regular honeycomb structure PVDF membranes. combined effect made channels chambers membrane well organized, walls transformed from solid fibrils cross-woven nanofiber-like entities. Porosity initially peaked at 84% series, gradually decreasing 72% increasing concentrations. X-ray diffraction (XRD), Fourier-Transformed Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) presence relative amount β- γ-polymorphs neat membrane, 88% an Mx, 96% β-PVDF constituting nearly entire portion polymorphs. electroactive polymorph content is noteworthy, highlighting its potential biomedical industrial applications.

Language: Английский

---

Surface Modification of Polyvinylidene Fluoride Latex Nanoparticles through Chain Entanglement by Poly(meth)acrylate Monomer Swelling Seeded Emulsion Polymerization

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

Polyvinylidene fluoride (PVDF) latex nanoparticles serve as a versatile platform for surface modification due to their role precursors in PVDF manufacturing. However, the strong chemical stability and poor compatibility of present significant challenges effective modification. To address this, we developed method that facilitates through chain entanglement. By employing monomer swelling emulsion polymerization, poly(meth)acrylate (PA) monomers are incorporated into subsequently polymerized. Rheological properties transmission electron microscopy mapping confirmed entanglement between PA, indicating successful integration. This is efficient, straightforward, highly adaptable, making it well-suited large-scale industrial production.

Language: Английский

---

Stimuli-responsive polymers at the interface with biology

Biomacromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Inspired by the responsiveness of natural systems to their surrounding environments, researchers have sought understand these biological processes and develop functional stimuli-responsive polymeric for a wide range applications such as drug delivery, imaging, regenerative medicine. Both synthetic polymers biopolymers been studied incorporated into assemblies different morphologies well hydrogels with diverse shapes dimensions. This special issue highlights recent research advances in this area, exciting challenges be tackled upcoming years.

Language: Английский

---

Polyvinylidene fluoride in biomedical applications: Properties, challenges, and future prospects

European Polymer Journal, Journal Year: 2025, Volume and Issue: unknown, P. 113889 - 113889

Published: March 1, 2025

Language: Английский

---

Barium Titanate Nanoparticles Dispersed Poly(Vinylidene Fluoride) and Poly(Vinylidene Fluoride-co-Hexafluoropropylene) Matrices Based Multifunctional Semiconducting Nanodielectrics for Versatile Technologies

Journal of Macromolecular Science Part B, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 21

Published: April 16, 2025

Language: Английский

---

Effects of perfluoropyridine incorporation into poly(hydroxyethyl methacrylate)

RSC Advances, Journal Year: 2025, Volume and Issue: 15(18), P. 14079 - 14087

Published: Jan. 1, 2025

Perfluoropyridine (PFP) is a heavily fluorinated heterocycle which readily undergoes nucleophilic aromatic substitution (SNAr) reactions at low temperatures. Herein, we report facile synthesis of 2-hydroxyethyl methacrylate derivatives PFP through solvothermal and mechanochemical means. The resulting monomers were polymerized to form hard, insoluble materials offer an improvement in thermal stability compared the starting alcohol. Most unusually 4-substituted PFP-methacrylate derivative displays superior properties air nitrogen generally Additionally, di-substitution di-methacrylate appears initiate decomposition monomer into ethylene glycol dimethacrylate acyl fluoride-mediated transesterification.

Language: Английский

---

Pressure-Induced Polar Phases of Poly(vinylidene fluoride) under Enhanced Dipole–Dipole Interactions by Introducing Poly(vinylidene fluoride-trifluoroethylene)

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 3, 2025

Language: Английский

---

Self‐Poled PVDF Infiltrated Nylon 11 Aerogels with Oriented Crystals for High‐Performance Piezoelectric Energy Harvesters and Self‐Powered Acoustic Sensors

Small, Journal Year: 2025, Volume and Issue: unknown

Published: May 10, 2025

Abstract Efficient piezoelectric polymers with enhanced electromechanical conversion gain significant attention for energy harvesting and sensing applications. Among them, poly(vinylidene fluoride) (PVDF) odd‐nylons stand out due to their high coefficients thermal stability. However, achieving a phase preferred crystal orientation optimal performance remains challenging, particularly under mild processing conditions. In this study, vacuum‐assisted infiltration technique is introduced fabricate PVDF‐infiltrated nylon‐11 (PVDFIPA11) aerogels oriented polymer crystallites. Anisotropic aerogels, featuring aligned crystals, serve as templates PVDF vacuum. This process facilitates the formation of highly β crystals alongside γ yielding fully self‐poled system without need external poling. A nanogenerator (PENG) based on PVDFIPA11 aerogel exhibits output voltage (peak‐to‐peak) ≈45 V pp peak power density 2.2 Wm⁻ 3 significantly outperforming pristine aerogels. Additionally, PENG demonstrated self‐powered acoustic sensor, effectively distinguishing sound signals at varying pressure levels. work provides scalable practical strategy developing paving way next‐generation energy‐harvesting devices sensors.

Language: Английский

---

Dynamic Covalent and Noncovalent Bonds Based Self‐assembled Biomaterials: From Construction to Biomedical Applications

Chinese Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 20, 2025

Comprehensive Summary Self‐assembly processes are ubiquitous in biological systems, playing essential roles sustaining life activities. The exploration of self‐assembled biomaterials (SABMs) holds great potential for advancing various fields, particularly biomedicine and materials science. Because the unique reversibility responsiveness to stimuli, dynamic covalent bonds (DCBs) noncovalent (NCBs) endow SABMs with self‐healing properties, stimuli controllable degradation, making them highly versatile a wide range biomedical applications. In this article, recent advances future trends based on DCBs NCBs thoroughly reviewed. We begin by introducing molecular principles characteristics that govern formation SABMs. also explore responsive functional features these detail. Finally, we summarize perspectives challenges associated development aim review offer comprehensive overview SABMs, serving as valuable resource chemists scientists striving further advance design Key Scientists

Language: Английский

---

Rapid hemostatic covered stent with drug-loaded gelatin-alginate/PVDF Janus composite membrane for coronary artery perforation

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: unknown, P. 136889 - 136889

Published: Oct. 1, 2024

Language: Английский

---