Mechanical testing of pyrolysed poly-furfuryl alcohol nanofibres

Abstract

We present experimental results on the characterization of the mechanical properties of pyrolysed poly-furfuryl alcohol (PFA) nanofibres. Specifically, Young’s modulus and the fracture strain of the nanofibres were measured by performing uni-axial tensile experiments on individual nanofibres in situ in a scanning electron microscope (SEM) using a microfabricated tensile testing device. The nanofibres tested varied in diameter from 150 to 300 nm. Young’s modulus is observed to be within the 1.3–2 GPa range.

Tensile testing of individual glassy, rubbery and hydrogel electrospun polymer nanofibres to high strain using the atomic force microscope

“…The existing methods range from the use of commercial universal testing machines, [29][30][31] to microelectronic mechanical systems (MEMS) [32][33][34][35] and the use of atomic force microscope (AFM) cantilevers observed under either a scanning electron microscope (SEM) [36][37][38][39] or optical microscope 40,41 to a broad range of approaches relying on the AFM for all measurements.…”

“…The best available universal testing machines have a minimum force resolution of 50 nN, which limits their use for testing individual nanofibres. MEMS force sensors are more accurate, but their use requires either in situ SEM 32,33 or the sensor needs to be glued to the fibre after mounting onto the MEMS testing platform. 34,35 These processes are cumbersome, creating a long downtime between samples, and have not been demonstrated for testing in liquid environments.…”

Novel method for mechanical characterization of polymeric nanofibers

“…28,29 Recently, Samuel et al reported on mechanical testing of pyrolyzed polymer nanofibers. 30 They also utilized a microdevice with a leafspring load cell, which was actuated externally with a piezomotor. The average length of a sample was 10 m, and the maximum engineering strain on the sample was 15%.…”

Зависимость Механических Свойств Сорбентов От Размеров Нанопор

“…Получение ПУМ с размерами пор от микро-до нанопор в зависимости от температуры, при которой осуществляется испарение полифурфурилового спирта, реализуется в процессе пиролиза [15][16][17].…”

“…В [14] экспериментально и теоретически по-казано, что модуль Юнга стеклоуглерода с плотно-стью 1.4 g/сm 3 составляет 30 GPa при размере нанопор 15−20 nm. При этом в [15][16][17] показано, что в процессе пиролиза можно управлять размерами пор стеклоуг-лерода. В связи с этим в настоящей работе впервые проведено теоретическое исследование изменения мо-дуля Юнга ПУМ плотностью 1.4 g/сm 3 в зависимости от размера пор.…”