Enhancing Tensile Strength and Surface Roughness of SLA 3D ‐Printed Composites via Nano‐Graphene Reinforcement

This study investigates the effect of process parameters on the tensile strength (TS) and surface roughness (SR) of nano‐graphene nanoplatelet (GNP) reinforced photopolymer composites produced by stereolithography (SLA). Although SLA offers high surface quality compared to other 3D polymer printing methods, the low mechanical strength of resin‐based parts limits structural applications. In this context, the main objective of the study is to determine the effects of layer thickness (0.02–0.06 mm), exposure time (20–30 s), and GNP ratio (0.1%–0.3%) on TS and SR using response surface method (RSM) experimental design, and to determine optimum production conditions. According to the results obtained, the highest TS was obtained as 40.74 MPa in the sample with a layer thickness of 0.02 mm, an exposure time of 20 s, and 0.3% GNP. ANOVA results showed that layer thickness and GNP ratio were statistically significant on TS and SR, while exposure time, although not effective alone, played a significant role in interaction with GNP ratio. FTIR, XRD, SEM, XPS, and TG–DSC analyses revealed that GNP addition strengthened resin‐reinforcement interface interactions and improved microstructural integrity. Thus, by selecting optimum parameters, high‐performance GNP‐reinforced composites could be produced using the SLA 3D printing method.

• Publication year

  2026

• Venue

  Journal of Applied Polymer Science

• Publication date

  2026-02-02

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1002/app.70490
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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