Utility of whiskerized carbon fabric surfaces in resistive heating of composites

Abstract

In the present study, the embedding ZnO nano‐whiskers (NWs) on carbon fiber (CF) surface was carried out to study the changes in Ohmic heating and mechanical stability of carbon fabric reinforced green epoxy composite laminates. The ZnO NWs were grown onto the CF surface by hydrothermal method and subsequently the laminate composites with different number of carbon woven layers were prepared. To study the resistive heating behavior of the laminate composites, the temperature versus time curves were analyzed in three sections, from which the temperature response rate, the maximum temperature, and the electrical power efficiency were estimated. Later, the effects of Ohmic heating action on the structural damage and mechanical stability of the composites were examined by dynamic mechanical analysis and X‐ray micro computerized tomography. Multilayer ZnO/carbon woven composites were found to be rapidly heating, less power consumption, and have improved mechanical and structural stability over bare carbon woven composites. This indicated that ZnO NWs enhanced the adhesion between the fibers and matrix, meanwhile acting as a heat barrier to avoid degradation of the epoxy at the interface of the fiber and matrix during Ohmic heating.

Developing a photothermal anti/deicing fluor‐free composite coating with high wear resistance and liquid impalement resistance based on a new biobased benzoxazine resin and polydopamine‐coated aluminum nitride

“…Each coating sample was inverted on the surface of 2000 # sandpaper, and a weight of 100 g was pressed on the sample. The specimen was moved 10 cm transversely, which is named as one‐cycle wear 5,17 . The contact angle (WCA) and sliding angle (SA) of the coating were measured after different cycles of wear.…”

“…The specimen was moved 10 cm transversely, which is named as one-cycle wear. 5,17 The contact angle (WCA) and sliding angle (SA) of the coating were measured after different cycles of wear.…”

“…2 This is a long-standing problem, and all these ice-induced problems put forward urgent requirements and great challenges for the development of anti/deicing strategies. 3,4 Up-to-date, mechanical, 5,6 electrothermal, 7,8 and solvent 9 deicing technologies have been developed, but they have problems such as low efficiency, high energy consumption, and environmental pollution. Different antiicing strategies, including superhydrophobic surfaces [10][11][12][13] and porous oil-filled smooth surfaces, 14 were also proposed to reduce the occurrence of icing formation; however, these surfaces usually have poor stability and short service life, while the preparation of porous oil-filled smooth surfaces is complicated.…”

Development of chopped (non‐woven) carbon fiber reinforced composite sheet and its electrothermal performance for heating applications

“…Heaters are heat-transferring devices that are commonly used in cold weather, chilly areas, and for many more heat-transferring applications, [1][2][3][4] where conductive heaters take the electrical energy as input and convert it into heat energy as output. 3,[5][6][7][8][9] Generally, conductive heaters possess different configurations, such as linear and twodimensional (2D) configuration, 10,11 that exhibits different input and output powers. The filament-type heater has a linear configuration, whereas the sheet-type heater possesses two-dimensional (2D) configuration that exhibits easy control and uniform heating on the surface.…”

“…Heaters are heat‐transferring devices that are commonly used in cold weather, chilly areas, and for many more heat‐transferring applications, 1–4 where conductive heaters take the electrical energy as input and convert it into heat energy as output 3,5–9 . Generally, conductive heaters possess different configurations, such as linear and two‐dimensional (2D) configuration, 10,11 that exhibits different input and output powers.…”