Effect of a Small Amount of Synthetic Fiber on Performance of Biocarbon‐Filled Nylon‐Based Hybrid Biocomposites

Abstract

Advanced hybrid biocomposites are engineered from nylon 6, waste wood biosourced carbon (biocarbon) with a low content of synthetic fiber for lightweight auto‐parts uses. The novel engineering process through direct injection molding of only 2 wt% synthetic fibers in the form of masterbatch with 20 wt% biocarbon, results outstanding performance of the resulting nylon biocomposites. Such uniquely developed biocomposites show tensile strength of 105 MPa and tensile modulus of 5.14 GPa with a remarkable heat deflection temperature (HDT) of 206 °C. The direct injection molding of synthetic fiber retains the length ≈3 times higher as compared to traditional extrusion and injection molding; resulting greater degree of entanglement and composite reinforcement effectiveness in the hybrid biocomposites. Highly dimensionally stable nylon 6 biocomposites with a very low coefficient of linear thermal expansion results through reinforcing ability of the sustainable biocarbon and small amount of synthetic fiber.

A Novel Manufacturing Concept of LCP Fiber-Reinforced GPET-Based Sandwich Structures with an FDM 3D-Printed Core

“…Similar problems occur in the case of injection molding technology, where the concept of using LFT (long fiber thermoplastic)-type granules allows an increase in the effectiveness of the reinforcement. However, it still does not come close to the results obtained by polymer laminates [ 30 , 31 , 32 ]. Therefore, one of the latest trends in overmolding technologies is the use of composite prepregs as inserts placed inside the mold’s cavity [ 33 , 34 , 35 , 36 , 37 ].…”

Sustainable biocomposites from pyrolyzed lignin and recycled nylon 6 with enhanced flame retardant behavior: Studies on manufacturing and quality performance evaluation

“…29 The highly polar nature of lignin allows it to be miscible with nylon (a polar polymer). 30 This is due to the intermolecular interaction of the polar polyamide matrix with the polar functional groups in lignin, resulting in strong adhesion, that can enhance the thermal, mechanical, and electrical properties of the biocomposites. 29,30 A few studies have been conducted on the effects of adding BioC to the nylon matrix.…”

“…30 This is due to the intermolecular interaction of the polar polyamide matrix with the polar functional groups in lignin, resulting in strong adhesion, that can enhance the thermal, mechanical, and electrical properties of the biocomposites. 29,30 A few studies have been conducted on the effects of adding BioC to the nylon matrix. The addition of miscanthus 12,31 and wood 30 BioC to the nylon 6 matrix showed significant enhancements in heat distortion temperature (HDT), tensile strength, and tensile modulus.…”

“…29,30 A few studies have been conducted on the effects of adding BioC to the nylon matrix. The addition of miscanthus 12,31 and wood 30 BioC to the nylon 6 matrix showed significant enhancements in heat distortion temperature (HDT), tensile strength, and tensile modulus. The addition of torrefied biomass to the nylon 6 matrix has been proven difficult due to the high processing temperatures of engineering plastics leading to the degradation of the biomass.…”

“…The carbonization temperature significantly influences the functionality of the produced BioC, which can influence the interactions with the polymer matrix 29 . The highly polar nature of lignin allows it to be miscible with nylon (a polar polymer) 30 . This is due to the intermolecular interaction of the polar polyamide matrix with the polar functional groups in lignin, resulting in strong adhesion, that can enhance the thermal, mechanical, and electrical properties of the biocomposites 29,30 …”