New nanomaterial could turn clothing into a health monitor

Researchers have reported a new material, pliable enough to be woven into fabric but imbued with sensing capabilities that could serve as an early warning system for injury or illness.

A material capable of sensing changes in body temperature

The material, described in a paper published by ACS Applied Nano Materials, involves the use of carbon nanotubes and is capable of sensing slight changes in body temperature while maintaining a pliable disordered structure – as opposed to a rigid crystalline structure – making it a good candidate for reusable or disposable wearable human body temperature sensors. Changes in body heat change the electrical resistance, alerting someone monitoring that change to the potential need for intervention.

Your body can tell you something is wrong before it becomes obvious,” said Seamus Curran, a physics professor at the University of Houston and co-author on the paper. Possible applications range from detecting dehydration in an ultra-marathoner to the beginnings of a pressure sore in a nursing home patient. The researchers said it is also cost-effective because the raw materials required are used in relatively low concentrations.

A discovery of Prof Curran and his research group

The discovery builds on work Curran and fellow researchers Kang-Shyang Liao and Alexander J. Wang began nearly a decade ago, when they developed a hydrophobic nanocoating for cloth, which they envisioned as a protective coating for clothing, carpeting and other fiber-based materials.

Wang is now a Ph.D. student at Technological University Dublin, currently working with Curran at UH, and is corresponding author for the paper. In addition to Curran and Liao, other researchers involved include Surendra Maharjan, Brian P. McElhenny, Ram Neupane, Zhuan Zhu, Shuo Chen, Oomman K. Varghese and Jiming Bao, all of UH; Kourtney D. Wright and Andrew R. Barron of Rice University, and Eoghan P. Dillon of Analysis Instruments in Santa Barbara.

The technique of production

The material, created using poly(octadecyl acrylate)-grafted multiwalled carbon nanotubes, is technically known as a nanocarbon-based disordered, conductive, polymeric nanocomposite, or DCPN, a class of materials increasingly used in materials science. But most DCPN materials are poor electroconductors, making them unsuitable for use in wearable technologies that require the material to detect slight changes in temperature.

The new material was produced using a technique called RAFT-polymerization, Wang said, a critical step that allows the attached polymer to be electronically and phononically coupled with the multiwalled carbon nanotube through covalent bonding. As such, subtle structural arrangements associated with the glass transition temperature of the system are electronically amplified to produce the exceptionally large electronic responses reported in the paper, without the negatives associated with solid-liquid phase transitions. The subtle structural changes associated with glass transition processes are ordinarily too small to produce large enough electronic responses.

Source: University of Houston


Leggi anche

Un centro all’avanguardia su programmi di ricerca innovativi ad alta tecnologia nei settori aerospazio, difesa e sicurezza: queste le caratteristiche dell’Aerotech Campus di Leonardo, inaugurato nei giorni scorsi durante l’evento #InnovarePerCrescere organizzato dall’azienda…

Leggi tutto…

Un team di ricercatori del FAMU-FSU College of Engineering dell’Istituto di materiali ad alte prestazioni della Florida State University sta sviluppando un progetto per uno scudo termico che protegge meglio satelliti, missili e aerei a reazione dalle altissime temperature a cui sono sottoposti…

Leggi tutto…

Il primo robot progettato a basso costo, al pari di una televisione di ultima generazione. Il robot è stato realizzato da un team di 32 ricercatori e designer dell’Istituto Italiano di Tecnologia (IIT) di Genova. Al massimo entro 18 mesi auspicano la produzione in serie, presto entrerà nelle nostre case….

Leggi tutto…

Chem -Trend è in grado di fornire sistemi distaccanti a base di acqua o di solvente per processi di stampaggio RTM e per via umida, compresi primer per stampi, sigillanti, distaccanti interni ed esterni e prodotti ausiliari come i detergenti per stampi. Essi consentono ai produttori che fabbricano volumi elevati di materiali compositi per l’industria automobilistica di mantenere l’operatività degli stampi….

Leggi tutto…

Gli UAV (unmanned aerial vehicle), i veicoli aerei senza pilota, ora sono droni e la tecnologia dei droni guarda oggi ai materiali compositi. Una delle grandi promesse di utilizzo dei compositi nei droni è quella di abilitare i sistemi persistenti di lunga durata che forniscono un accesso a Internet WiFi su ampia area. Due i prototipi in volo, L’ Aquila di Facebook e il Jungle Hawk Owl prodotto dall’Istituto di tecnologia del Massachusetts

Leggi tutto…