scholarly journals Electrospun Nanofiber Membranes from 1,8-Naphthimide-Based Polymer/Poly(Vinyl Alcohol) for pH Fluorescence Sensing

Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 520
Author(s):  
Le Xu ◽  
Xi Liu ◽  
Jiao Jia ◽  
Hao Wu ◽  
Juan Xie ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
High Performance ◽  
Fluorescent Sensor ◽  
Ph Sensor ◽  
High Sensitivity ◽  
Poly Vinyl Alcohol ◽  
Fluorescence Sensing ◽  
Water Treatment Process ◽  
Sensing Applications ◽  
Nanofiber Membranes

Accurately and sensitively sensing and monitoring the pH in the environment is a key fundamental issue for human health. Nanomaterial and nanotechnology combined with fluorescent materials can be emerged as excellent possible methods to develop high-performance sensing membranes and help monitor pH. Herein, a series of fluorescent nanofiber membranes (NFMs) containing poly-1,8-naphthimide derivative-3-[dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azaniumyl]propane-1-sulfonate (PNI-SBMA) are fabricated by electrospinning the solution of PNI-SBMA blended with poly(vinyl alcohol) (PVA). The surfactant-like functionalities in side chains of PNI-SBMA endow the NFMs with outstanding hydrophilicity, and the naphthimide derivatives are sensitive to pH by photoinduced electron transfer effect, which contribute to highly efficient pH fluorescence sensing applications of NFMs. Specifically, the PNI-SBMA/PVA NFM with a ratio of 1:9 (NFM2) shows high sensitivity and good cyclability to pH. This work demonstrates an effective strategy to realize a fluorescent sensor NFM that has a fast and sensitive response to pH, which will benefit its application of pH sensor monitoring in the water treatment process.

A covalent organic polymer for turn-on fluorescence sensing of hydrazine

2022 ◽  
Author(s):  
Jiangpeng Wang ◽  
Canran Wang ◽  
Shan Jiang ◽  
Wenyue Ma ◽  
Bin Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Fluorescent Sensor ◽  
Organic Polymer ◽  
Fluorescence Sensing ◽  
Turn On

A polymer, COP-Ta, was designed and synthesized. It served as a turn-on fluorescent sensor for hydrazine detection with high performance.

Graphene-reinforced poly(vinyl alcohol) electrospun fibers as building blocks for high performance nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (103) ◽  
pp. 85009-85018 ◽  
Author(s):  
Sajjad Ghobadi ◽  
Sina Sadighikia ◽  
Melih Papila ◽  
Fevzi Çakmak Cebeci ◽  
Selmiye Alkan Gürsel
Keyword(s):  
Polymer Matrix ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Building Blocks ◽  
Poly Vinyl Alcohol ◽  
Electrospun Fibers ◽  
Matrix Solution ◽  
High Level

Graphene-containing fibrous structures with a high level of affinity towards a polymer matrix solution have been proved to be promising for high performance macroscopic nanocomposite reinforcement purposes.

BIODEGRADABLE BIOARTIFICIAL MATERIALS MADE BY CHITOSAN AND POLY(VINYL ALCOHOL). PART II: ENZYMATIC DEGRADABILITY AND DRUG-RELEASING ABILITY

2008 ◽  
Vol 20 (05) ◽  
pp. 321-328 ◽  
Author(s):  
Caterina Cristallini ◽  
Niccoletta Barbani ◽  
Francesca Bianchi ◽  
Davide Silvestri ◽  
Giulio D. Guerra
Keyword(s):  
Vinyl Alcohol ◽  
High Performance ◽  
Effective Diffusion ◽  
Cancer Drug ◽  
Poly Vinyl Alcohol ◽  
Effective Diffusion Coefficients ◽  
Hydrophilic Nature ◽  
Degradation Rates ◽  
Anti Cancer ◽  
Enzymatic Degradability

Bioartificial biodegradable materials were prepared mixing chitosan (CHI) and poly(vinyl alcohol) (PVA), then manufactured as films, and finally cross-linked with glutaraldehyde (GTA), both in the absence and in the presence of the edible hexa-alcohol sorbitol (SOR), as a plasticizer. The release of the components into water was tested by high performance liquid chromatography (HPLC); no release of CHI and scarce release of PVA were found. The water uptake was tested by measuring the swelling of the materials, after incubating them for 20 h in an atmosphere saturated with water vapor at 37°C. The swelling percentage increases with increasing CHI content in the blends, although it is the less hydrophilic polymer. This behavior was attributed to the difficulty of water to diffuse through the crystalline PVA structure, which is partially altered in the blends. The addition of SOR enhances the water sorption, as expected. The biodegradability of the materials was tested using the specific enzyme chitosanase, and was found to depend on the blend composition, as well as to be enhanced by the addition of SOR. The initial degradation rates were calculated; the maximum rates were found when the CHI to PVA ratio was 80:20 for all systems. The results of the enzymatic degradation generally agree with those of the swelling. The cross-linked blends were also tested as drug-delivery systems. The drugs chosen were the vitamin L-ascorbic acid (AsA) and the anti-cancer drug paclitaxel (PTX). The effective diffusion coefficients, D eff , were evaluated for the release of both the drugs from each material. Those of AsA are greater, of many powers of ten, than those of PTX, owing mainly to the hydrophilic nature of the first drug and to the hydrophobic of the second one. In conclusion, these materials seem available for biomedical use.

A novel hybrid anion exchange membrane for high performance microbial fuel cells

RSC Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 4659-4663 ◽  
Author(s):  
Hu-Chun Tao ◽  
Xiao-Nan Sun ◽  
Ying Xiong
Keyword(s):  
Titanium Dioxide ◽  
Fuel Cells ◽  
Anion Exchange ◽  
Microbial Fuel Cells ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Anion Exchange Membrane ◽  
Poly Vinyl Alcohol ◽  
Exchange Membrane

A novel titanium dioxide (TiO2)–quaternized poly(vinyl alcohol) (QAPVA) hybrid anion exchange membrane (T membrane) is prepared, and its feasibility for use in microbial fuel cells (MFCs) is investigated in this study.

Tailoring the characteristics of graphite oxide nanosheets for the production of high-performance poly(vinyl alcohol) composites

Carbon ◽  
2012 ◽  
Vol 50 (15) ◽  
pp. 5525-5536 ◽  
Author(s):  
Yan Wang ◽  
Zixing Shi ◽  
Junrong Yu ◽  
Lei Chen ◽  
Jing Zhu ◽  
...  
Keyword(s):  
Graphite Oxide ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Poly Vinyl Alcohol

High Performance Poly (Vinyl Alcohol)-Zeolite LTA Composite Membranes for Ethanol Dehydration Pervaporation

2011 ◽  
Vol 287-290 ◽  
pp. 2053-2056
Author(s):  
Zhen Huang ◽  
Wei Juan Jiang ◽  
Xiao Han Shi ◽  
Li Jun Teng
Keyword(s):  
Separation Factor ◽  
Vinyl Alcohol ◽  
High Performance ◽  
Composite Membranes ◽  
Ethanol Solution ◽  
Poly Vinyl Alcohol ◽  
Processing Temperature ◽  
Ethanol Dehydration ◽  
Zeolite Lta ◽  
Separation Performances

Three-layered zeolite LTA-filled poly (vinyl alcohol) (PVA) composite membranes have been fabricated for water removal from highly concentrated ethanol solution by means of pervaporation. Higher separation factor and higher fluxes are both achieved after adding zeolite 3A, 4A and 5A. Through evaluating separation factor and permeation flux, separation performances of the composite membranes are elucidated in terms of the zeolite pore size and processing temperature.

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