Ultralow Wear Self-Mated PTFE Composites

Meter, Kylie E. Van; Junk, Christopher P.; Campbell, Kasey L.; Babuska, Tomas F.; Krick, Brandon A.

doi:10.1021/acs.macromol.1c02581

Cited by 25 publications

(7 citation statements)

References 52 publications

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“…There are some possible explanations for why a higher volume loss was observed at a lower speed. Though it is tempting to suggest that this demonstrates velocity dependence on wear, it is also known that applied normal load affects wear rate [42] which also mentioned by Van Meter et al [43]. It is possible PLA samples experience slightly higher normal load than ABS.…”

Section: Sliding Speed Dependencymentioning

confidence: 83%

Orientation Controls Tribological Performance of 3D-Printed PLA and ABS

Mahmood,

Guo,

Stirling

et al. 2023

Tribology Online

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Additive manufacturing is rapidly growing in popularity for manufacturing parts with tunable mechanical properties. Recent studies show that mechanical properties can be achieved by controlling the layer orientation and build structure. In this work the effect of print orientation on tribological properties of 3D printed PLA and ABS are investigated. PLA and ABS samples are printed using fused deposition modeling (FDM) with three different print orientations. Tribological results show that variation in build direction relative to the sliding direction causes anisotropy in wear properties. The best wear properties are achieved with the samples printed where the layers remain orthogonal to the sliding direction. The coefficient of friction remains mostly unaffected by print orientation. PLA samples demonstrate significantly better tribological properties compared to ABS. Varying the sliding speed between the interacting surfaces also affects the wear properties of both PLA and ABS. The results suggest that optimizing the build orientation can improve the wear performance of additively manufactured thermoplastics. This enables an additional paradigm when designing for functionally graded materials.

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Section: Sliding Speed Dependencymentioning

confidence: 83%

Orientation Controls Tribological Performance of 3D-Printed PLA and ABS

Mahmood,

Guo,

Stirling

et al. 2023

Tribology Online

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show abstract

“…However, upon examination of the normal load data of the slow-speed experiments normal load was shown to be signi cantly higher than the 50N load prescribed by the experimental procedure. Therefore, the effect of normal load is considered for both PLA and ABS as shown in Van Meter et al [31]. Figure 4c shows the volume loss for PLA at both standard and half speed; the relatively higher normal load shifts the overall volume loss of the v h samples to the right when the volume loss is plotted against the normal load times sliding distance.…”

Section: Sliding Speed Dependencymentioning

confidence: 99%

Orientation controls tribological performance of 3D-printed model thermoplastics

Mahmood

Guo

Sterling

et al. 2022

Preprint

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Additive manufacturing is rapidly growing in popularity due to its capability to produce parts with customized mechanical properties. Recent studies show that mechanical properties can be altered in a controlled manner by adjusting the relationship between build orientation and the applied loading from the service. In this work, the effect of build orientation on the tribological properties of 3D printed PLA – Polylactic acid and ABS- Acrylonitrile butadiene styrene is investigated. PLA and ABS samples are printed using material extrusion with three different build orientations. Tribological results show that variation in build direction relative to the sliding direction leads to anisotropic wear properties. The best wear properties are achieved when the layers are oriented orthogonally to the sliding direction. The coefficient of friction remains mostly unaffected by the build orientation. PLA samples demonstrate significantly better tribological properties compared to ABS. Varying the sliding speed between the interacting surfaces also affects the wear properties of both PLA and ABS. The results suggest that optimizing the build orientation with respect to service loading can improve the wear performance of additively manufactured thermoplastics. This presents an additional paradigm when designing additively manufactured parts potentially for functionally graded materials.

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“…Many studies have been focused on reducing the COF of polymer materials by modifying the polymer structure or blending a polymer with another one that shows low COF 19,20 . For example, PTFE with low COF was added into poly(ether ether)ketone (PEEK) to reduce the COF, and it was found that the COF of PTFE/PEEK blends decreased to the lowest value by adding 15% PTFE 21,22 . Adding lubricant is also a common method to reduce the COF.…”

Section: Introductionmentioning

confidence: 99%

“…19,20 For example, PTFE with low COF was added into poly(ether ether)ketone (PEEK) to reduce the COF, and it was found that the COF of PTFE/PEEK blends decreased to the lowest value by adding 15% PTFE. 21,22 Adding lubricant is also a common method to reduce the COF. The commonly used lubricants include fatty acid amides, hydrocarbons, fatty acids, esters, alcohols, metal soaps and compound lubricants etc.…”

Section: Introductionmentioning

confidence: 99%

Erucamide/thermoplastic polyurethane blend with low coefficient of friction, high elasticity and good mechanical properties for intelligent wearable devices

Jia

Tian²,

Liu

et al. 2022

Polymer International

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In this study, erucamide as a non-toxic and tasteless lubricant was melt blended with thermoplastic polyurethane (TPU) to reduce the coefficient of friction (COF) of TPU and thus to improve the wearing comfort of intelligent wearable devices. The results show that when the content of erucamide reaches percolation, erucamide can migrate to the TPU surface, forming a layer of lubrication film, and thus significantly reduces the COF of TPU. In addition, erucamide with amide groups can form hydrogen bonds with carbamate groups from TPU chains and thus can disrupt the hydrogen bonds between two amide groups of TPU chains. With the introduction of erucamide, the chain mobility of TPU increases, the partial phase mixing of soft phase and hard phase of TPU occurs, and the interchain interaction between TPU chains decreases. Under the appropriate content of erucamide (0.5 wt%), both the elasticity and processability of TPU are also significantly improved, whereas the high tensile strength, tear strength and elongation at break of the TPU blend is still obtained, facilitating its practical application in intelligent wearable devices.

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Ultralow Wear Self-Mated PTFE Composites

Cited by 25 publications

References 52 publications

Orientation Controls Tribological Performance of 3D-Printed PLA and ABS

Orientation Controls Tribological Performance of 3D-Printed PLA and ABS

Orientation controls tribological performance of 3D-printed model thermoplastics

Erucamide/thermoplastic polyurethane blend with low coefficient of friction, high elasticity and good mechanical properties for intelligent wearable devices

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