Influence of bioactive metal fillers on microstructural homogeneity of PA12 composites produced by polymer Laser Sintering

Gruber, Piotr; Ziółkowski, Grzegorz; Olejarczyk, Michał; Grochowska, Emilia; Hoppe, Viktoria; Szymczyk‐Ziółkowska, Patrycja; Kurzynowski, Tomasz

doi:10.1007/s43452-022-00442-4

Cited by 7 publications

(3 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Few polymer types are commercially available for PBF, but the most common are polyamide 12 (PA12) and thermoplastic polyurethane (TPU). There are several articles about polymer PBF with thermally and electrically conductive fillers (e.g., carbon-based fillers such as carbon fibres [25], graphite [26], CNT [27] and graphene [28], or metal fillers such as Cu [29] and Ag [30]). The literature on PBF with thermally conductive and electrically insulating polymer-based composites is sparse, and most studies use PA12 as the polymer matrix [24], [31], [32].…”

Section: Introductionmentioning

confidence: 99%

Thermally Conductive Polymer Composites with Hexagonal Boron Nitride for Medical Device Thermal Management

Do,

Imenes,

Aasmundtveit

et al. 2024

IMAPSource Proceedings

View full text Add to dashboard Cite

Polymer composites with hexagonal boron nitride (hBN) have the potential to meet the heat dissipation and electrical insulation requirements of electronic and medical devices. In this study, hBN/polymer composites were fabricated with thermoplastic polyurethane (TPU) and epoxy as matrix materials. Three hBN powder types (BN1, BN2, BN3) with different platelet sizes and degrees of agglomeration were used. BN1 (with average size of 1 μm) and BN2 (with average size of 12 μm) mainly contained hBN platelets, while BN3 (with average size of 20 μm) contained both platelets and agglomerates of platelets. BN2 gave the highest thermal conductivity, while BN1 gave the lowest thermal conductivity. Thermal simulations were performed for a medical device with a limit for the maximum surface temperature. For the encapsulation of this device, several material combinations were simulated, using anisotropic thermal conductivity data. This included encapsulations with inner layers of commercial thermally and electrically conductive materials and an outer layer of the best thermally conductive (and electrically insulating) hBN/TPU composite fabricated by the authors.

show abstract

Section: Introductionmentioning

confidence: 99%

Thermally Conductive Polymer Composites with Hexagonal Boron Nitride for Medical Device Thermal Management

Do,

Imenes,

Aasmundtveit

et al. 2024

IMAPSource Proceedings

View full text Add to dashboard Cite

show abstract

“…There are several articles about PBF of polymer composites with thermally and electrically conductive fillers (e.g., carbon-based fillers such as carbon fibres [ 27 ], graphite [ 28 ], CNT [ 29 ] and graphene [ 30 ], or metal fillers such as Cu [ 31 ] and Ag [ 32 ]). On the contrary, the literature on PBF with thermally conductive and electrically insulating polymer-based composites is sparse, and most studies use PA12 as the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Mechanical Properties of Polymer Composites with Hexagonal Boron Nitride—A Comparison of Three Processing Methods: Injection Moulding, Powder Bed Fusion and Casting

et al. 2023

View full text Add to dashboard Cite

Materials providing heat dissipation and electrical insulation are required for many electronic and medical devices. Polymer composites with hexagonal boron nitride (hBN) may fulfil such requirements. The focus of this study is to compare composites with hBN fabricated by injection moulding (IM), powder bed fusion (PBF) and casting. The specimens were characterised by measuring thermal conductivity, tensile properties, hardness and hBN particle orientation. A thermoplastic polyurethane (TPU) was selected as the matrix for IM and PBF, and an epoxy was the matrix for casting. The maximum filler weight fractions were 65%, 55% and 40% for IM, casting and PBF, respectively. The highest thermal conductivity (2.1 W/m∙K) was measured for an IM specimen with 65 wt% hBN. However, cast specimens had the highest thermal conductivity for a given hBN fraction. The orientation of hBN platelets in the specimens was characterised by X-ray diffraction and compared with numerical simulations. The measured thermal conductivities were discussed by comparing them with four models from the literature (the effective medium approximation model, the Ordóñez-Miranda model, the Sun model, and the Lewis-Nielsen model). These models predicted quite different thermal conductivities vs. filler fraction. Adding hBN increased the hardness and tensile modulus, and the tensile strength at high hBN fractions. The strength had a minimum as the function of filler fraction, while the strain at break decreased. These trends can be explained by two mechanisms which occur when adding hBN: reinforcement and embrittlement.

show abstract

“…This process involves feeding the lament from a spool into the extruding nozzle head, where it is heated and then deposited onto a build plate to generate the desired geometry. MEX technology has several signi cant advantages, including the diverse choice of lament, such as acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), acrylonitrile styrene acrylate (ASA), polyether ether ketone (PEEK), Polypropylene (PP) [4], and polyethene terephthalate glycol (PETG) [5], colours in lament [6], polymer-metal composites [7], bre-reinforced polymer composites [8], [9], easy material loading or replacement, capability to utilize recycled materials [10], [11], inexpensive maintenance rates, fast manufacturing of small parts, up to 0.1 mm tolerance, printing complex geometries [12], and safe and nontoxic ingredients [13]. These advantages make it a popular manufacturing method in various industries [14].…”

Section: Introductionmentioning

confidence: 99%

Ironing Process Optimization for Enhanced Properties in Material Extrusion technology using Box-Behnken Design

Alzyod,

Ficzere

2023

Preprint

View full text Add to dashboard Cite

Material Extrusion (MEX) technology, a prominent method in the field of additive manufacturing (AM), has witnessed significant growth in recent years. The continuous quest for enhanced material properties and refined surface quality has led to the exploration of post-processing techniques. In this study, we delve into the ironing process as a vital processing step, focusing on the optimization of its parameters through the application of Design of Experiments (DoE), specifically the Box-Behnken Design (BBD). The investigation reveals the profound impact of ironing on material properties and surface quality. Through a systematic exploration of ironing process parameters, we identify optimal conditions that lead to substantial improvements in Ultimate Tensile Strength (UTS), Compressive Strength (CS), Flexural Strength (FS), Impact Strength (IS), and surface roughness (Ra). The introduction of ironing minimizes voids, enhances layer bonding, and reduces surface irregularities, resulting in components that not only exhibit exceptional mechanical performance but also possess refined aesthetics. This research sheds light on the transformative potential of precision experimentation, post-processing techniques, and statistical methodologies in advancing Material Extrusion technology. The findings offer practical implications for industries requiring high-performance components with structural integrity and aesthetic appeal.

show abstract

Influence of bioactive metal fillers on microstructural homogeneity of PA12 composites produced by polymer Laser Sintering

Cited by 7 publications

References 26 publications

Thermally Conductive Polymer Composites with Hexagonal Boron Nitride for Medical Device Thermal Management

Thermally Conductive Polymer Composites with Hexagonal Boron Nitride for Medical Device Thermal Management

Thermal Conductivity and Mechanical Properties of Polymer Composites with Hexagonal Boron Nitride—A Comparison of Three Processing Methods: Injection Moulding, Powder Bed Fusion and Casting

Ironing Process Optimization for Enhanced Properties in Material Extrusion technology using Box-Behnken Design

Contact Info

Product

Resources

About