Back to Search Start Over

Study of Polydiacetylene-Poly (Ethylene Oxide) Electrospun Fibers Used as Biosensors.

Authors :
Alam AKMM
Yapor JP
Reynolds MM
Li YV
Source :
Materials (Basel, Switzerland) [Materials (Basel)] 2016 Mar 16; Vol. 9 (3). Date of Electronic Publication: 2016 Mar 16.
Publication Year :
2016

Abstract

Polydiacetylene (PDA) is an attractive conjugated material for use in biosensors due to its unique characteristic of undergoing a blue-to-red color change in response to external stimuli. 10,12-Pentacosadiynoic acid (PCDA) and poly (ethylene oxide) (PEO) were used in this study to develop fiber composites via an electrospinning method at various mass ratios of PEO to PCDA, solution concentrations, and injection speeds. The PEO-PDA fibers in blue phase were obtained via photo-polymerization upon UV-light irritation. High mass ratios of PEO to PCDA, low polymer concentrations of spinning solution, and low injection speeds promoted fine fibers with small diameters and smooth surfaces. The colorimetric transition of the fibers was investigated when the fibers were heated at temperatures ranging from 25 °C to 120 °C. A color switch from blue to red in the fibers was observed when the fibers were heated at temperatures greater than 60 °C. The color transition was more sensitive in the fibers made with a low mass ratio of PEO to PCDA due to high fraction of PDA in the fibers. The large diameter fibers also promoted the color switch due to high reflectance area in the fibers. All of the fibers were analyzed using Fourier transform infrared spectroscopy (FT-IR) and differential scanning calorimetry (DSC) and compared before and after the color change occurred. The colorimetric transitional mechanism is proposed to occur due to conformational changes in the PDA macromolecules.

Details

Language :
English
ISSN :
1996-1944
Volume :
9
Issue :
3
Database :
MEDLINE
Journal :
Materials (Basel, Switzerland)
Publication Type :
Academic Journal
Accession number :
28773326
Full Text :
https://doi.org/10.3390/ma9030202