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Effect of carbon nanotubes on mechanical properties of polyamide 12 parts by fused filament fabrication

文献类型：期刊论文

作者Qi, Shunxin2,3; Gao, Xia1; Su, Yunlan2,3; Zhou, Yong2,3; Dong, Xia2,3; Wang, Dujin2,3
刊名POLYMER
出版日期2022-04-28
卷号247页码:11
关键词Polyamide 12 Carbon nanotubes Mechanical properties Lamellar orientation Interfacial welding
ISSN号0032-3861
DOI10.1016/j.polymer.2022.124784
通讯作者Gao, Xia(gaoxia@cigit.ac.cn) ; Su, Yunlan(ylsu@iccas.ac.cn)
英文摘要Polymer parts fabricated by fused filament fabrication (FFF) technique usually exhibit weak and anisotropic mechanical properties, compared with their injection-molded (IM) counterparts. Thus, the evolution of FFF from rapid prototyping into manufacture tool requires three-dimensional enhancement ways for FFF-printed parts. To this end, we develop a series of carbon nanotubes (CNTs)-embedded polyamide 12 (PA12) filaments and investigate the effect of CNTs on the mechanical properties of the FFF-printed PA12 parts. In the direction parallel to the deposited strands, PA12/CNT parts show considerable mechanical reinforcement compared with neat PA12 specimens, including the increase of tensile and impact strength by 18% and 125%, respectively. The marked improvement in impact strength arises from the oriented structures induced by the shear field during FFF process as well as the layer-by-layer microstructure, which provide multiple ways to dissipate impact energy. However, these oriented CNTs and inter-filament voids tend to act as stress concentration points under the tensile stress, thus accounting for a slight increase in tensile strength. In the direction perpendicular to the deposited strands, the FFF-printed PA12/CNT parts also exhibit improved tensile strength, i.e. interfacial weld strength, as CNTs allow the rapid transfer of the thermal energy from the newly-deposited filament to the weld interface and thus provide longer time for molecular interdiffusion. Altogether, the anisotropy in tensile strength of the FFFprinted parts is reduced from 0.36 for neat PA12 parts to 0.28 for PA12/CNT specimens. This work is believed to provide a facile route to overcome mechanical limitations in FFF technique.
资助项目National Key Research and Development Program of China[2017YFB307600] ; Innovation and Cultivation Project, ICCAS ; General Project of Chongqing Natural Science Foundation[cstc2021jcyj-msxm1324]
WOS研究方向Polymer Science
语种英语
WOS记录号WOS:000790007900007
出版者ELSEVIER SCI LTD
源URL[http://119.78.100.138/handle/2HOD01W0/15867]  
专题中国科学院重庆绿色智能技术研究院
通讯作者Gao, Xia; Su, Yunlan
作者单位1.Chinese Acad Sci, Chongqing Engn Res Ctr Applicat Technol 3D Printi, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
2.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Qi, Shunxin,Gao, Xia,Su, Yunlan,et al. Effect of carbon nanotubes on mechanical properties of polyamide 12 parts by fused filament fabrication[J]. POLYMER,2022,247:11.
APA Qi, Shunxin,Gao, Xia,Su, Yunlan,Zhou, Yong,Dong, Xia,&Wang, Dujin.(2022).Effect of carbon nanotubes on mechanical properties of polyamide 12 parts by fused filament fabrication.POLYMER,247,11.
MLA Qi, Shunxin,et al."Effect of carbon nanotubes on mechanical properties of polyamide 12 parts by fused filament fabrication".POLYMER 247(2022):11.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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