Chemical recycling of carbon fiber reinforced plastic using supercritical methanol

Recycling of carbon fiber-reinforced plastic using supercritical and subcritical fluids

“…The elimination of the matrix resin from CFRP increased up to 86 % at 375°C and 15 min using 0.05-0.10 M potassium hydroxide, compared with that of 31 % at the same condition without catalyst. Using semicontinuous apparatus, the elimination of the matrix resin reached 98 % at 350°C and 1.1 kg of n-propanol/kg of fiber/min without catalyst, and 96.5 % of the elimination of We carried out the CFRP recycling using supercritical methanol by the batch-type and semi-flow-type experimental setups [33,34]. In this study, the matrix resin was bisphenol-A-type epoxy resin cured with 1,2-Cyclohexane dicarboxylic anhydride.…”

Impact of Solvolysis Process on Both Depolymerization Kinetics of Nylon 6 and Recycling Carbon Fibers from Waste Composite

“…Since the recycling depends strongly on mechanical properties, it is important to evaluate the tensile strength of recovered carbon fibers. Okajima et al [16] studied the recycling of CFRP in supercritical methanol, and clean carbon fibers were recovered at 380 °C, 25 MPa. The tensile strength of the fibers was 9% less than virgin ones.…”

Recycling of CFRP for High Value Applications: Effect of Sizing Removal and Environmental Analysis of the SuperCritical Fluid Solvolysis

“…Thus, the process needed a better reaction medium to reduce its impact on environment [10]. It motivated researchers to use supercritical fluids [17][18][19][20][21][22][23].…”

“…However, the process can produce high quality rCF in only 15 to 120 min and it can lead to a possible reuse of the matrix (e.g. manufacturing of epoxy [17,21]). The water is widely used as supercritical fluid [17][18][19][20] since it is harmless and inexpensive.…”