Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/168995
Title: Surface modification of oriented glass fibers for improving the mechanical properties and flame retardancy of polyamide 12 composites printed by powder bed fusion
Authors: Hou, Yanbei
Gao, Ming
An, Ran
Tey, Wei Shian
Li, Boyuan
Chen, Jiayao
Zhao, Lihua
Zhou, Kun
Keywords: Engineering::Mechanical engineering
Issue Date: 2023
Source: Hou, Y., Gao, M., An, R., Tey, W. S., Li, B., Chen, J., Zhao, L. & Zhou, K. (2023). Surface modification of oriented glass fibers for improving the mechanical properties and flame retardancy of polyamide 12 composites printed by powder bed fusion. Additive Manufacturing, 62, 103195-. https://dx.doi.org/10.1016/j.addma.2022.103195
Project: IAF-ICP 
Journal: Additive Manufacturing
Abstract: The orientation of glass fibers (GF) introduced by powder bed fusion (PBF) imparts enhanced mechanical properties to polyamide 12 (PA12). However, there is still much room for reinforcement of PBF-printed GF/PA12 composites. In addition, no studies have addressed the flame retardancy of PBF-printed GF/PA12 composites impaired by the candlewick-like effect of GF. This work presents a feasible and practical approach for addressing these two issues, by surface modification of GF with layered double hydroxide (LDH) to synthesize LDH@GF hybrids. Compared with the ultimate tensile strength, Young's modulus, flexural strength, and flexural modulus of the GF/PA12 composites, those of the LDH@GF/PA12 composites increased by 21.3%, 54.3%, 31.8%, and 36.7%, respectively. Meanwhile, LDH weakened the candlewick-like effect of GF and thus improved the flame retardancy of the PA12 composites. Compared with the peak heat release rate and total heat release of the GF/PA12 composites, those of LDH@GF/PA12 composites were reduced by 17.7% and 12.7%, respectively. The mechanisms for mechanical reinforcement and flame retardancy of LDH@GF hybrids were investigated and proposed. This work paves the way for PBF to prepare flame-retardant high-strength PA12 composites and provides a new solution to boost the performance of additively manufactured products.
URI: https://hdl.handle.net/10356/168995
ISSN: 2214-7810
DOI: 10.1016/j.addma.2022.103195
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: HP-NTU Digital Manufacturing Corporate Lab
Singapore Centre for 3D Printing 
Rights: © 2022 Published by Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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