Enhancing the tensile properties of <scp>PA6</scp>/<scp>CNT</scp> nanocomposite in selective laser sintering process

Taher, Fatemeh; Hardani, Hatam; Bakhshi, Soroush; Samadi, Mohammad Reza; Ayaz, Mohsen

doi:10.1002/pc.27171

Cited by 12 publications

(5 citation statements)

References 33 publications

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Section: Resultssupporting

confidence: 62%

“…Agglomeration of the CNTs led to poor distribution of the nanoparticles and thus the degradation of weld strength. The enhancement of the TS of polyamide composites by addition of CNTs was also found by Taher et al, [14] Qi et al, [17] Vidakis et al, [45] and Bai et al [46] The significant interaction of parameters versus the impact and tensile strengths was presented by response surface plots. Based on the ANOVA results (in Table 5), it was found that the influence of the interaction of laser power and welding velocity (LP Â WV) as well as laser power and CNT content (LP Â CNT) is significant on the impact and tensile strengths.…”

Section: Analysis Of Microstructuresupporting

confidence: 58%

“…[ 12,13 ] The addition of carbon nanotube (CNTs) to PA12 matrix enhances the thermal and mechanical properties of the PA12/CNT nanocomposite, since the CNTs act as a stress‐transfer interface due to their large specific surface area. [ 14 ]…”

Section: Introductionmentioning

confidence: 99%

“…[12,13] The addition of carbon nanotube (CNTs) to PA12 matrix enhances the thermal and mechanical properties of the PA12/CNT nanocomposite, since the CNTs act as a stress-transfer interface due to their large specific surface area. [14] There are different methods to produce the PA12/ CNT nanocomposite. A considerable attention has been paid to additive manufacturing (AM) during the recent years in the field of polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the mechanical properties and microstructure of the weld joint obtained by laser welding of PA12/CNT nanocomposites

Samadi

Afshari

Nasehi

et al. 2023

Polymer Engineering & Sci

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In this article, the 3D printed polyamide12/carbon nanotube (PA12/CNT) nanocomposites were joined using laser welding. The factorial design method was applied to study the effect of laser power, welding velocity, and CNT content on the tensile and impact strengths of welded samples. The differential scanning calorimetry and thermogravimetric analysis were also used to measure the thermal stability and weight loss temperature of the nanocomposite. The results indicated that the increase of CNTs enhanced the thermal stability of the nanocomposite and so increased its melting point and crystallinity percentage. The impact and tensile strengths of the weld enhanced when laser power elevated from 40 to 50 W, but elevation of laser power up to 60 W decreased the impact and tensile strengths due to thermal degradation of the nanocomposite. A rise in welding velocity from 10 to 20 mm/s enhanced the tensile strength, while the impact strength initially enhanced and then decreased. The highest tensile strength obtained at 2 wt% CNT, whereas the addition of CNTs up to 4 wt% led to their agglomeration, which resulted in the reduction of impact and tensile strengths. Finally, the optimal conditions for concurrent increase of impact and tensile strengths include the laser power of 51 W, welding velocity of 12.5 mm/s, and CNT content of 2.3 wt%.

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Section: Resultssupporting

confidence: 62%

Section: Analysis Of Microstructuresupporting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigating the mechanical properties and microstructure of the weld joint obtained by laser welding of PA12/CNT nanocomposites

Samadi

Afshari

Nasehi

et al. 2023

Polymer Engineering & Sci

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“…Figure 1 shows the classic confocal optical path.In the overall layout of the optical path, the briefness and practicality of the overall structure are fully considered, and the minimum number of lenses is used as much as possible to accomplish the expected goals. In the design process, Zemax software is utilized in this paper for the design of the confocal optical path [2] . The radial and axial resolution of the confocal optical imaging system is determined by the wavelength and numerical aperture.…”

Section: General Layout and Design Goalmentioning

confidence: 99%

Design of optical path and mechanical structure for non-contact confocal scanning imaging system

liu,

Liao,

Liu

et al. 2024

International Conference on Optics and Machine Vision (ICOMV 2024)

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This paper designs a non-contact laser confocal system and its mechanical structure. A relatively simple optical structure was sought to be used while ensuring that the design specifications were accomplished. The article designed the lens set and analyzed its imaging quality using Zemax software. The results show that the focusing dispersion spot diameter of the microfocusing system is less than 3 μm, and the RMS radius is less than 1 μm; the focusing dispersion spot diameter of the detection and acquisition system is less than 15 μm, and the RMS radius is less than 5 μm; and the MTF curves of all subsystems are close to the diffraction limit, which indicates that the optical transmission quality is good. In addition, the mechanical structure of the optical path system is designed in this paper to ensure the compactness and simplicity of the whole system.Finally, it can be seen from the physical experiment and software simulation that the designed confocal optical path system has good optical imaging performance

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Optimization of FFF process parameters to improve the tensile strength and impact energy of polylactic acid/carbon nanotube composite

Hardani,

Afshari,

Allahyari

et al. 2024

Polymer Engineering & Sci

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In this study, the process parameters of fused filament fabrication are optimized to improve the tensile strength and impact energy of polylactic acid/carbon nanotube (PLA/CNT) composite. Hence, the utility function (UF) technique and response surface method (RSM) are applied to explore the optimal levels of the effective parameters of print speed, nozzle temperature, and CNT content. The differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and SEM analyses are employed to examine the thermal properties of the printed samples. The results of DSC and TGA analyses exhibited that the incorporation of CNT into PLA enhanced the thermal strength of PLA/CNT composite. The addition of CNTs in the composite improved the tensile strength by 37%, while the addition of CNTs up to 4 wt% improved the impact energy by 29%. Moreover, an increment of the print speed to 60 mm/s reduced the impact energy (12%) and tensile strength (22%), while an increment of the nozzle temperature to 200°C enhanced the impact energy (9%) and tensile strength (12%). The optimization results demonstrated that the strength and impact energy of PLA/CNT composite optimized at CNT content of 2.8 wt%, print speed of 20 mm/s, and nozzle temperature of 209°C. Additionally, the impact energy and tensile strength of the PLA/CNT composite enhanced up to 62.5 MPa and 2.14 J at the optimum conditions.Highlights Application of FFF process for producing the PLA/CNT composite Investigating the impact of FFF parameters on the mechanical properties Estimating the optimal conditions of the FFF process

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Enhancing the tensile properties of PA6/CNT nanocomposite in selective laser sintering process

Cited by 12 publications

References 33 publications

Investigating the mechanical properties and microstructure of the weld joint obtained by laser welding of PA12/CNT nanocomposites

Investigating the mechanical properties and microstructure of the weld joint obtained by laser welding of PA12/CNT nanocomposites

Design of optical path and mechanical structure for non-contact confocal scanning imaging system

Optimization of FFF process parameters to improve the tensile strength and impact energy of polylactic acid/carbon nanotube composite

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