Laser sintering and post-processing of a walnut shell/Co-PES composite

Yu, Yueqiang; Guo, Yanling; Jiang, Tongmin; Jiang, Kaiyi; Li, Jian; Guo, Shuai

doi:10.1039/c7ra00775b

Cited by 27 publications

(19 citation statements)

References 8 publications

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“…The unsintered materials are reusable and recyclable, and the manufactured parts are often more accurate than those produced using other techniques. SLS can be applied widely for the manufacture of construction, medical, automobile, and industrial products, where composite materials and nanocomposite can be used [13][14][15][16][17][18][19][20]. SLS technology is rapidly developing and has been used in a variety of composite product applications, including wood-based materials and investment casting.…”

Section: Introductionmentioning

confidence: 99%

“…A wide variety of materials can be used with SLS technology, including ceramics, polycarbonates, polymers, metals, and composites, but the high price of these materials has restricted a further application of SLS [24]. Consequently, a reduction in the cost of these raw materials is expected to promote wider implementation of the technology [13].…”

Section: Introductionmentioning

confidence: 99%

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Selective Laser Sintering (SLS) and Post-Processing of Prosopis Chilensis/Polyethersulfone Composite (PCPC)

Idriss

Wang

et al. 2020

Materials

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The range of selective laser sintering (SLS) materials is currently limited, and the available materials are often of high cost. Moreover, the mechanical strength of wood–plastic SLS parts is low, which restricts the application of a SLS technology. A new composite material has been proposed to address these issues, while simultaneously valorizing agricultural and forestry waste. This composite presents several advantages, including reduced pollution associated with waste disposal and reduced CO2 emission with the SLS process in addition to good mechanical strength. In this article, a novel and low-cost Prosopis chilensis/polyethersulfone composite (PCPC) was used as a primary material for SLS. The formability of PCPC with various raw material ratios was investigated via single-layer experiments, while the mechanical properties and dimensional accuracy of the parts produced using the various PCPC ratios were evaluated. Further, the microstructure and particle distribution in the PCPC pieces were examined using scanning electron microscopy. The result showed that the SLS part produced via 10/90 (wt/wt) PCPC exhibited the best mechanical strength and forming quality compared to other ratios and pure polyethersulfone (PES), where bending and tensile strengths of 10.78 and 4.94 MPa were measured. To improve the mechanical strength, post-processing infiltration was used and the PCPC-waxed parts were enhanced to 12.38 MPa and 5.73 MPa for bending and tensile strength.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Selective Laser Sintering (SLS) and Post-Processing of Prosopis Chilensis/Polyethersulfone Composite (PCPC)

Idriss

Wang

et al. 2020

Materials

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“…Besides, the use of forestry waste would reduce the environmental impact and increase the scope of material available for SLS. Several previous studies focused on various materials: sintered wood-plastic composites (WPC) (Zeng et al 2013); rice husk powder/Co-polyether sulfone (PES) (RHPC) (Weiliang et al 2012); walnut shell/Co-PES composites (Yu et al 2017); and bamboo plastic composites (Yu et al 2018). These studies focused on the mechanical properties of the laser-sintered biomass composite part.…”

Section: Introductionmentioning

confidence: 99%

Effects of various processing parameters on the mechanical properties of sisal fiber/PES composites produced via selective laser sintering

Idriss

Wang

et al. 2020

BioRes

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A new type of sustainable material, i.e., a sisal fiber/poly-ether sulfone composite (SFPC), which is energy-efficient, environmentally friendly, and has a low cost, was developed for laser sintering additive manufacturing. This study was performed to explore the effects of the processing parameters on the SFPC composite parts produced via selective laser sintering (SLS). The effects of the laser sintering processing parameters, i.e., the preheating temperature, laser power, and scan speed, were studied. Bending and tensile testing of the SFPC specimens was successfully performed via SLS. The effect of the processing parameters on the SLS in terms of the mechanical strength of the laser-sintered parts was investigated. The results determined that the processing parameters had a significant effect on the mechanical strength of the sintered SFPC parts. When the preheating temperature and laser power were increased in the processing SLS system, the mechanical strength of the sintered SFPC parts was significantly increased. However, the scanning speed had an inverse proportional relationship to the mechanical strength of the SFPC SLS parts.

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“…Although SLS can produce WPC molded parts with complex structure and high precision, the mechanical properties of these formed parts were weak, probably because of the characteristic of polymers. The mechanical properties of the formed parts were improved by post-processing; however, good results were difficult to achieve because of the complex process of post-processing [ 24 , 25 ]. Therefore, it is essential to study the influence of the characteristics of the employed polymers on the quality of the produced WPC parts.…”

Section: Introductionmentioning

confidence: 99%

Study on the Characteristics of Walnut Shell/Co-PES/Co-PA Powder Produced by Selective Laser Sintering

Guo

Jiang

et al. 2018

Materials

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Agricultural and forestry wastes are used as materials for selective laser sintering (SLS) to alleviate resource shortage, reduce the pollution of the environment, lower the cost of materials, and improve the accuracy of parts produced by SLS. However, the mechanical properties of wood–plastic parts are poor, and thus they cannot be applied widely. In order to improve the mechanical properties of wood–plastic parts, a new type of walnut shell polymer composite (WSPC) was prepared by a polymer mixing method and was used to produce parts via SLS. Additionally, the dimensional accuracy, morphologies, density, and mechanical properties of the WSPC parts were studied. The results showed that the addition of a small amount of copolyamide (Co-PA) powder could effectively improve the mechanical properties and decrease the density of the WSPC parts. By increasing the amount of Co-PA powder and decreasing that of copolyester (Co-PES) powder, the mechanical properties first increased, then decreased, and finally increased again; in addition, the density first decreased then increased. By increasing the preheating temperature, the mechanical properties and density of the WSPC parts were enhanced.

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Laser sintering and post-processing of a walnut shell/Co-PES composite

Cited by 27 publications

References 8 publications

Selective Laser Sintering (SLS) and Post-Processing of Prosopis Chilensis/Polyethersulfone Composite (PCPC)

Selective Laser Sintering (SLS) and Post-Processing of Prosopis Chilensis/Polyethersulfone Composite (PCPC)

Effects of various processing parameters on the mechanical properties of sisal fiber/PES composites produced via selective laser sintering

Study on the Characteristics of Walnut Shell/Co-PES/Co-PA Powder Produced by Selective Laser Sintering

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