Abstract
In the fields of agriculture, medical treatment, food, and packaging, polymers are required to have the characteristics of self-cleaning, anti-icing, and anti-corrosion. The traditional preparation method of hydrophobic coatings is costly and the process is complex, which has special requirements on the surface of the part. In this study, fused deposition modeling (FDM) 3D printing technology with design and processing flexibility was applied to the preparation of hydrophobic coatings on polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS) parts, and the relationship between the printing process parameters and the surface roughness and wettability of the printed test parts was discussed. The experimental results show that the layer thickness and filling method have a significant effect on the surface roughness of the 3D-printed parts, while the printing speed has no effect on the surface roughness. The orthogonal experiment analysis method was used to perform the wettability experiment analysis, and the optimal preparation process parameters were found to be a layer thickness of 0.25 mm, the Grid filling method, and a printing speed of 150 mm/s.
Highlights
Polylactic acid (PLA) is a polymer obtained by polymerization of lactic acid as the main raw material
acrylonitrile butadiene styrene (ABS) has the common properties of three components: A makes it resistant to chemical corrosion and heat, and has a certain surface hardness; B makes it have high elasticity and toughness; S makes it have the characteristics of thermoplastic molding and improves electrical properties
Materials, the surfaceand roughness distribution different printing process show that the layer thickness and filling method have a significant effect on the surface roughness
Summary
Polylactic acid (PLA) is a polymer obtained by polymerization of lactic acid as the main raw material. Jiang [33] analyzed the FDM forming process by a numerical model and experiment, and obtained the mechanism of dimensional error, and the function of specific surface accuracy error was constructed. The preparation of coatings on the surface of printed parts requires in-depth research to explore the relationship between process parameters and surface wettability. The contact angle measuring instrument was used to measure the static contact angle of the surface coating, and the wettability changes of the 3D-printed parts under different process parameters were evaluated and Polymers 2020, 12, x FOR PEER REVIEW. The angle measuring instrument was used to measure the static contact angle 3ofofthe surface coating, and the wettability changes of the 3D-printed parts under different process parameters analyzed.
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