scholarly journals Photophysical Details and O2-Sensing Analysis of a Eu(III) Complex in Polymer Composite Nanofibers Prepared by Electrospinning

2022 ◽  
Vol 9 ◽  
Author(s):  
Chunguo Cui ◽  
Lina Song ◽  
Chao Li ◽  
Tiantian Lin ◽  
Kaiyao Shi
Keyword(s):  
Polymer Composite ◽  
Ground State ◽  
Linear Response ◽  
Composite Nanofibers ◽  
Central Metal ◽  
Oxygen Quenching ◽  
Composite Nanofiber ◽  
Emission Quenching ◽  
O2 Sensing ◽  
The Eu

An as-synthesized Eu(III) complex, denoted as Eu(N-DPNQ)(TTD)3, was prepared and characterized, and the antenna mechanism between these ligands and central metal emitter was studied. Here DPNQ means 10-ethyl-10H-indolo [2′,3':5,6]pyrazino[2,3-f][1,10]phenanthroline and TTD is 4,4,4-trifluoro-1-(thiophen-2-yl)butane-1,3-dione. We find that Eu(N-DPNQ)(TTD)3 emission intensity dependents on oxygen concentration, and O2-sensing skill of Eu(N-DPNQ)(TTD)3 in polymer composite nanofibers of poly (vinylpyrrolidone) (PVP) prepared by electrospinning is investigated. Results reveal that the emission quenching of Eu(N-DPNQ)(TTD)3 is caused by the ground state (triplet) oxygen quenching on antenna ligands triplet state. The Eu(N-DPNQ)(TTD)3 doped composite nanofiber with a loading level of 6 wt% exhibits the best result with sensitivity of 2.43 and response time of 10 s, along with linear response.

Preparation of Chitosan-Polycaprolactone (PCL) Composite Nanofiber as Potential for Annulus Fibrosus Regeneration

2020 ◽  
Vol 840 ◽  
pp. 368-376 ◽  
Author(s):  
Nur Rofiqoh Eviana Putri ◽  
Dhimas Agung Kurniawan ◽  
Bintang Adi Pradana ◽  
Nadya Alfa Cahaya Imani ◽  
Yuni Kusumastuti
Keyword(s):  
Electron Microscopy ◽  
Annulus Fibrosus ◽  
Composite Nanofibers ◽  
Synthetic Polymer ◽  
Medical Applications ◽  
Scanning Calorimetry ◽  
Composite Nanofiber ◽  
Remarkable Result ◽  
Ivd Degeneration ◽  
Scanning Electron

Tissue engineering has shown a remarkable result in medical applications. Further exploration, these multidisciplinary fields are also given a possibility as an alternative medication for intervertebral disc (IVD) degeneration. Focusing on the annulus fibrous repair, to improve the mechanical properties of biomaterials, a composite made of chitosan and polycaprolactone (PCL) was developed in this present study. Due to its tuneable properties, the electrospinning-based method was used in the experiment to create the chitosan/PCL composite. Varies concentration of PCL (11, 12, and 13 wt%) and a different ratio of precursors chitosan to PCL (1:1; 1:3; 1:5) were used to optimize the composition of natural and synthetic polymer in the composite nanofibers. The obtained nanofibers were then characterized using Scanning Electron Microscopy (SEM) to observe the morphology, swelling test, Fourier Transform Infrared (FTIR) spectroscopy, and Differential Scanning Calorimetry (DSC). The results show that the increasing concentration and composition of PCL could form the more homogeneous and larger diameter of nanofiber with fewer beads compare to the lower composition of PCL nanofiber. Meanwhile, the swelling percentage decreases by increasing the amount of PCL. FTIR results also show that all samples of composite nanofibers contain both chitosan and PCL.

scholarly journals Morphology and Surface Properties of Poly (L-lactic acid)/Captopril Composite Nanofiber Membranes

2012 ◽  
Vol 7 (1) ◽  
pp. 155892501200700 ◽  
Author(s):  
Anfang Wei ◽  
Juan Wang ◽  
Xueqian Wang ◽  
Dayin Hou ◽  
Qufu Wei
Keyword(s):  
Lactic Acid ◽  
Composite Nanofibers ◽  
Chemical Components ◽  
Pore Width ◽  
Surface Areas ◽  
Composite Nanofiber ◽  
Mass Fractions ◽  
Ft Ir ◽  
Nanofiber Membranes ◽  
Better Than

In this study, Poly (L-lactic acid)/Captopril composite nanofiber membranes were electrospun for drug delivery. Different mass fractions of Poly (L-lactic acid), different ratios of Captopril and the influences of PEG4000 added in the spinning solution are discussed. The morphology, chemical components, the surface areas and pore sizes, wettability of the composite nanofiber membranes were investigated. The results showed that the diameters of the composite nanofibers increased with the increase of Poly (L-lactic acid) mass fractions, the diameters decreased with the increase of Captopril content as well as the addition of the surfactant. Fourier Transform Infrared (FT-IR) showed the chemical components of Captopril remained unchanged when it was electrospun into the composite nanofibers. The surface areas pore width and pore volume of the composite nanofibers became a little larger than those of poly (L-lactic acid) nanofibers, and the wettability of the composite nanofiber membranes was better than those of poly (L-lactic acid) nanofiber membranes. Wettability was improved by an increase of the drug load amount.

Transformation of polymer composite nanofibers to diamond fibers and films by microwave plasma-enhanced CVD process

2014 ◽  
Vol 312 ◽  
pp. 188-191 ◽  
Author(s):  
Š. Potocký ◽  
T. Ižák ◽  
B. Rezek ◽  
P. Tesárek ◽  
A. Kromka
Keyword(s):  
Polymer Composite ◽  
Composite Nanofibers ◽  
Microwave Plasma ◽  
Plasma Enhanced Cvd

Electrospun fluorescein/polymer composite nanofibers and their photoluminescent properties

2012 ◽  
Vol 21 (9) ◽  
pp. 097805 ◽  
Author(s):  
Zhi-Hua Zhang ◽  
Yun-Ze Long ◽  
Hong-Xin Yin ◽  
Bin Sun ◽  
Jie Zheng ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Nanofibers

Ground-state correlations and linear response of metal clusters

1995 ◽  
Vol 51 (7) ◽  
pp. 4569-4578 ◽  
Author(s):  
C. Yannouleas ◽  
F. Catara ◽  
N. Van Giai
Keyword(s):  
Ground State ◽  
Linear Response ◽  
Metal Clusters

scholarly journals Fabrication and Characterization of Polyvinyl Chloride/Copolyester/Nanoclay Composite Nanofiber

2021 ◽  
Vol 33 (8) ◽  
pp. 1868-1874
Author(s):  
S. Jasmine ◽  
D. Reuben Jonathan ◽  
J. Sidharthan ◽  
D. Roopsingh
Keyword(s):  
Polyvinyl Chloride ◽  
Room Temperature ◽  
Composite Nanofibers ◽  
Schmidt Reaction ◽  
Electrospinning Method ◽  
Composite Nanofiber ◽  
Nmr Techniques ◽  
Ft Ir ◽  
Acid Catalyzed

Four random copolyesters were prepared by the polycondensation reaction of diols namely 1,5-dihydroxyanthraquinone, 4,4′-oxybis(benzoic acid) and variable chalcone diol. Four chalcone diols were produced by acid catalyzed Claisen-Schmidt reaction at room temperature. These random copolyesters were elucidated by solubility tests and viscosity measurements. The FT-IR, 1H & 13C NMR techniques were applied to establish the repeating units present in the copolyester backbone. Electrospinning method was employed to derive polyvinyl chloride-copolyester-nanoclay composite nanofiber from tetrahydrofuran medium. Scanning electron microscopy (SEM) was utilized to examine the morphology of the nanofibers. These composite nanofibers are expected to be a potential biomaterial of greater significance.

Oriented Nanomaterial Air Bridges Formed from Suspended Polymer-Composite Nanofibers

ACS Nano ◽  
2007 ◽  
Vol 1 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Santosh Pabba ◽  
Anton N. Sidorov ◽  
Scott M. Berry ◽  
Mehdi M. Yazdanpanah ◽  
Robert S. Keynton ◽  
...  
Keyword(s):  
Polymer Composite ◽  
Composite Nanofibers
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