Abstract
In this study, the effect of 10,12-pentacosadiynoic acid (PCDA) on the fabrication of PDA/PU nanofibers was examined. The PDA/PU nanofibers were prepared by electrospinning PU and PCDA at different mixing ratios, followed by photopolymerization. The viscosity and conductivity of the spinning solution and the morphology of the fabricated nanofibers were analyzed. We also examined the chemical structure changes, physical structure changes, and color transition characteristics of PDA/PU nanofibers. The concentrations of the spinning solutions and the mixing ratio of PCDA and PU had significant effects on the viscosity of the spinning solution and the diameter and shape of the nanofibers. The optimum conditions for economic efficiency and the practicality of the fabrication of a PDA/PU nano-fibers were 12–14 wt% spinning solution and a ratio of PU to PCDA of 4 to 1 or greater. For these conditions, the viscosity was in the range of 225–290 cP, which resulted in the production of smooth, uniform PDA/PU nanofibers without beads. The diameters of the nanofibers ranged from 270 to 550 nm. The results of FT-IR, XRD and DSC analyses confirmed that the PCDA were well mixed with the PU molecules and were electrospun. The fabricated PDA/PU nanofibers exhibited color transition phenomenon by external temperature stimulation above 70 °C.
Highlights
The conjugated polymers studied as materials of biosensors are sensitive to external stimuli
The polymerization of polydiacetylene (PDA) by light irradiation Figure 2 shows that the pentacosadiynoic acid (PCDA)/PU nanofibers were white before photopolymerization
The PU to PCDA ratio was directly proportional to the viscosity, and the viscosity increased as the PU to PCDA ratio increased in the
Summary
The conjugated polymers studied as materials of biosensors are sensitive to external stimuli. The conjugated polymer is superior in thermal properties to low molecular weight materials and is widely used as a material for detecting heavy metals, and noxious gas because it is applied to thin films and the like (Son et al 2015). Polydiacetylene (PDA) is a conjugated polymer that has an intersection between a double bond and a triple bond. PDA can be synthesized by polymerizing diacetylene monomers through UV light irradiation, free radical polymerization, or plasma treatment (Okada et al 1998; Lee et al 2014; Lu et al 2014). The advantage of diacetylene monomer in the aqueous state is that it has the ability to self-assemble into a three-dimensional structure. The wavelength of the self-assembled, three-dimensional structure is similar to that of a polymer intersecting with a triple
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
