Effect of polyurethane dispersion treatment on the performance improvement of carbon woven fabric-reinforced composites

Abstract

In this study, two types of polyurethane dispersion were applied as surface treatment for 10 types of washed/nonwashed carbon plain woven fabric-reinforced thermosetting and thermoplastic composites. To investigate the effects of surface treatment on the mechanical properties, the impregnation of various laminates was observed by a digital microscope. Dynamic mechanical analysis (DMA) was employed to investigate the interfacial interaction properties. Static tensile test was used to study the mechanical properties of composites. A correlation between the mechanical properties and interfacial interaction of composites was successfully observed. The acoustic emission (AE) from various composites was recorded in order to investigate the initial fracture and failure mechanism. Meanwhile, the knee-point method was also employed to look for initial fracture, which showed a good fit to initial strain detected from AE (amplitude > 80 dB). Furthermore, scanning electron microscopic images of single fiber and fractured carbon fiber bundles confirmed the interfacial properties evaluated by DMA analysis. Finally, remarkable improvement in mechanical properties (≈33.3%) of CF/PA6 laminates is discussed.

Improvement in mechanical, electrical, and shape memory properties of the polystyrene‐based carbon fiber‐reinforced polymer composites containing carbon nanotubes

“…23,24 The commonly used surface treatment methods are acid oxidation, 25 plasma treatment, 26 rare earth treatment, 27 gamma irradiation, 28 and silane coupling agent treatment. 29 Other treatment methods are laser treatment, 30 chemical grafting, polymer coating, polyurethane dispersion (PUD) sizing, 31,32 stitching, 33 interleaving polymeric nanofibers in interlaminar regions, 34 and synthesizing carbonaceous structures on CFs. 35 Latif et al investigated the effect of silane coupling agent amount on the mechanical properties of vinylester-epoxy hybrid resinbased carbon fiber-reinforced polymers.…”

Effect of interfacial coating and testing conditions on the flexural performance of carbon woven fibre-reinforced polyamide laminates

“…The carbon fibres, polyamide 6 matrix, PUD surface treating agents, fabric treating procedures and fabricating processes of the CF/PA6 laminates investigated in the present study were basically same to those reported in Refs. [5, 6]. In detail, a commercial carbon cloth (TC33-3K) in plain-woven structure from Formosa Plastic Corporation (Taipei, Taiwan) was used as reinforcement, which contained 50 (warp) 50 (weft) bundles (fineness of warp and weft yarns: 200 tex) per 10 10 cm 2 area.…”

“…Polymer composites are composed of various reinforcements and matrix systems, hence the mechanical properties are mainly influenced by reinforcements/matrix properties, reinforced forms, the surface morphology of reinforcement, impregnation condition and also interfacial bonding capability between reinforcements and matrix [3][4][5][6][7][8]. There are lots of methods to improve the impregnation condition and interfacial bonding capability.…”

“…Recently, polyurethane dispersion (PUD) is being more considered to be an ideal surface coating agent for glass and carbon fibres due to its outstanding advantages such as low viscosity, excellent bonding capability with the matrix, relatively low price and fast reaction speed [5,6,22]. Liao et al [22] investigated the effect of different pick-up ratios of PUD sizing and their hybrid combination (silane-PUD) interfacial treatment agents on the mechanical properties of glass woven fabric-reinforced epoxy composites.…”

“…Recently, polyurethane dispersion (PUD) is being more considered to be an ideal surface coating agent for glass and carbon fibres due to its outstanding advantages such as low viscosity, excellent bonding capability with the matrix, relatively low price and fast reaction speed [5, 6, 22]. Liao et al.…”