Direct Colorimetric Temperature Measurement Ahead of Flame Zone with Polydiacetylenes DOI Creative Commons
Tanner J. Finney, Abigail W. Wilson,

Marisa L. Poveda

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Measurement of temperature and heat transfer ahead spreading fire is essential to developing our understanding the mechanisms involved in spread explosions. Because gradients fires are often steep occur on short spatial time scales, these measurements notoriously difficult. Current techniques such as thermocouples require painstakingly careful engineering ensure accurate results. Other approaches thermal cameras Schlieren imaging expensive, complex optical setups that not amenable widespread deployment, specialized expertise deploy. Polydiacetylenes (PDAs), a class color-changing polymers, were developed into dynamic sensors, enabling direct measurement fire. Diacetylene (DA) precursors (polymerized form PDAs) synthesized undergo visible color changes response well-defined temperatures ranging from ≈50 200 °C. PDAs coated flammable substrates, their responsiveness was demonstrated with combustion paper, cardboard, nitrocellulose. found be able directly track zone sub-millimeter microsecond resolution. The sensors have broad applicability due ease simple readout, low cost. Dynamic PDA particularly applicable situations demanding high temporal resolutions, deflagrations (fast) or backing (short-range gradients).

Language: Английский

Chromic Electrospun Polymer Nanofibers: Preparation, Applications, and the Future DOI

Donya Razzaghi,

Milad Babazadeh‐Mamaqani, Amin Babaie

et al.

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

Published: Jan. 8, 2025

Physical understanding and determination of different analytes without the need for advanced additional equipment are highly important, which can be achieved by using stimuli-induced chromic materials. chemical incorporation responsive chromophores into polymers results in fabrication polymers. Chromic electrospun nanofibers prepared electrospinning technique, their stimuli-responsivity is improved due to high surface-to-volume ratio. This Perspective focuses on recent studies developments nanofibers. Within this Perspective, these divided classes photochromic, thermochromic, electrochromic, mechanochromic, halochromic, solvatochromic, hydrochromic, ionochromic according stimuli they respond. In addition, preparation methods, compounds, conditions, response mechanisms, applications will discussed. The main such food packaging sensors, health monitoring anticounterfeiting materials, ink-free rewritable media, smart clothing. Several new strategies also proposed future studies. multiresponsive that combine properties a single system multifunctional merge stimuli-responsive with other functionalities considered future. aims assist researchers scientists development applications, including multimode sensors packaging, shape memory-assisted dual-mode encryption important data.

Language: Английский

Citations

5
Direct Colorimetric Temperature Measurement Ahead of Flame Zone with Polydiacetylenes DOI Creative Commons
Tanner J. Finney, Abigail W. Wilson,

Marisa L. Poveda

et al.

ACS Omega, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Measurement of temperature and heat transfer ahead spreading fire is essential to developing our understanding the mechanisms involved in spread explosions. Because gradients fires are often steep occur on short spatial time scales, these measurements notoriously difficult. Current techniques such as thermocouples require painstakingly careful engineering ensure accurate results. Other approaches thermal cameras Schlieren imaging expensive, complex optical setups that not amenable widespread deployment, specialized expertise deploy. Polydiacetylenes (PDAs), a class color-changing polymers, were developed into dynamic sensors, enabling direct measurement fire. Diacetylene (DA) precursors (polymerized form PDAs) synthesized undergo visible color changes response well-defined temperatures ranging from ≈50 200 °C. PDAs coated flammable substrates, their responsiveness was demonstrated with combustion paper, cardboard, nitrocellulose. found be able directly track zone sub-millimeter microsecond resolution. The sensors have broad applicability due ease simple readout, low cost. Dynamic PDA particularly applicable situations demanding high temporal resolutions, deflagrations (fast) or backing (short-range gradients).

Language: Английский

Citations

0