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Polymer Brush Induced Electroless Copper Plating on PA12 Surface for Tensile Strength Enhancement of Selective Laser Sintering Part

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Abstract

Metal particles can be deposited on nylon 12 (PA12) surface with excellent metal/substrate interface and distribution by electroless plating (EP), but the use of noble metal as EP catalyst would enhance the cost of raw materials and restrict its application. In this work, we developed a polymer brush (PB)-induced EP method to prepare Cu particle/PA12 composite powder (CPP) as an enhancing component for improving the strength of the selective laser sintering (SLS) part. The results showed hydrolyzed 3-amino-propyltriethoxysilane attached on the modified PA12 surface, which presented in PB form. The PB effectively reduced the stability of [Cu-EDTA] complex and REDOX barrier, subsequently, PB acted as catalytic site to reduce Cu ion into Cu metal by EP. The deposit consisted of Cu particles (spherical, about 1 μm) and a small quantity of Cu2O particles (cubic, about 0.3 μm), the ratio of Mplated particle/M(plated particle+PA12) is 15%. The PA12 particles were spheroidized firstly, then formed sintered neck during neighboring particles and sintered body in turn under laser action. Based on the excellent Cu/PA12 interface and dispersion, the tensile strength of the SLS part sintered with 10 W laser energy increased by an average of around 26.2% to 53 MPa.

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Funding

The authors thank the financial supports by the Natural Science Foundation of Guangxi Province (2018 GXNSFAA281218 and 2019 GXNSFAA245027), Undergraduate Teaching Reform Project for Higher Education of Guangxi Province (2019JGZ150), the Guangxi science and technology base, and special talents (2018AD19127 and 2018AD19106).

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Authors and Affiliations

  1. Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City, 542899, China

    Zhenming Chen, Chengmei Gui,  Wei Yao & Peng Li

  2. School of Chemistry and Chemical Engineering, Chaohu University, Hefei City, 230009, China

    Chengmei Gui

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  1. Zhenming Chen
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  2. Chengmei Gui
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Correspondence to Peng Li.

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Zhenming Chen, Gui, C., Wei Yao et al. Polymer Brush Induced Electroless Copper Plating on PA12 Surface for Tensile Strength Enhancement of Selective Laser Sintering Part. J. of Materi Eng and Perform 31, 1297–1305 (2022). https://doi.org/10.1007/s11665-021-06275-1

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  • DOI: https://doi.org/10.1007/s11665-021-06275-1

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