Inorganic Fullerene-Like WS2 Reinforced Polyamide Powders for Improved Mechanical Properties in Laser Sintered Nanocomposite Parts  

作　　者：Dayuan Qiang Binling Chen Yu Chen Zhuxian Yang Oana Ghita Nannan Wang Yanqiu Zhu 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,School of Resources,Environment and Materials,Guangxi University,Nanning,530004,China [2]College of Engineering,Mathematics and Physical Sciences,University of Exeter,Exeter,EX44QF,United Kingdom [3]School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081,China

出　　处：《Additive Manufacturing Frontiers》2024年第2期200-211,共12页增材制造前沿(英文)

基　　金：supported by National Natural Science Foundation(Grant.Nos.12205056,51972068);Natural Science Foundation of Guangxi Province in China(Grant.No.2021GXNSFBA076003);the UK Engineering and Physical Science Research Council(EPSRC)for funding(EPSRC Grant:Novel high-performance polymeric composite materials for additive manufacturing of multifunctional components,EP/N034627/1).

摘　　要：Polyamide(PA)is a widely utilized engineering polymer,and its thermal and mechanical properties can be further improved by adding nanofillers.However,adding inorganic fullerene-like tungsten disulfide(IF-WS_(2))nanoparticles(NPs)to PA to produce composite precursor powders for additive manufacturing is challenging.Here,we report a novel and cost-effective method for fabricating PA-12 based nanocomposite(NC)powders with fixed/partially encapsulated IF-WS_(2) nanoparticulate fillers utilizing an advanced mixing technique because simple wet mixing(WM)can only attach fillers weakly to the powder surfaces when compared to the proposed method.The resulting nanocomposite powders maintained nearly the original particle size distribution of PA-12.They also exhibited improved rheological properties,melting,and crystallization behaviors compared with those prepared by the WM method.The laser-sintered PA-12 nanocomposite specimens revealed enhanced pow-der thermal stability and higher tensile strengths than pristine PA-12,validating the advantages of the novel technique for the fabrication of polyamide nanocomposite powders and their suitability for utilization in laser sintering additive manufacturing.These results demonstrate that high-performance engineered PA-12 nanocom-posite components can be directly laser sintered,and this technique can potentially be extended to fabricate other engineered polymeric nanocomposite powders.

关 键 词：POLYAMIDE IF-WS_(2) Laser sintering Mixing methods 

分 类 号：TB3[一般工业技术—材料科学与工程]