Incorporating crosslinks in fused filament fabrication: Molecular insight into post deposition reactions
Incorporating crosslinks in fused filament fabrication: Molecular insight into post deposition reactions
复制标题
在熔丝制造中加入交联:对沉积后反应的分子洞察
DOI:
10.1016/j.addma.2020.101746
复制
发表时间:
2021
影响因子:
11
通讯作者:
Dadmun, Mark D.
中科院分区:
文献类型:
--
作者:
Perryman, S. Connor;Dadmun, Mark D.
3D printed objects suffer from intrinsic mechanical weakness due to low interlayer adhesion and defects that result in anisotropy in their mechanical properties. In this report, we examine the ability of a protocol to incorporate covalent bonds between layers to strengthen interlayer adhesion by depositing multi-amines between layers during the fused filament fabrication printing process. The multi-amines may then react with oxygenated functional groups on the deposited filament to form covalent crosslinks between layers. Determination of the interfacial fracture energy and infrared (IR) spectroscopy studies indicate the successful formation of covalent bonds and strengthening of the interlayer interface with a variety of multi-amines. More importantly, IR results also elucidate the relative rate of reaction of the amines with oxygenated functional groups found on the oxidized filament. These results show that the crosslinking reactions primarily occur shortly after deposition of the filament, i.e. at elevated temperatures. The data also show that the reactivity of the amines is not the prevailing factor in determining interfacial strength, as the aromaticity of the crosslinker plays a key role in creating a stronger interface. These results therefore provide important foundational understanding that can be used to apply this protocol to a variety of extrusion based additive processes and materials.
登录
查看更多内容
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
M. Fedtke;F. Domaratius;A. Pfitzmann
通讯作者:
A. Pfitzmann
影响因子:
5
作者:
Duh, Yih-Shing;Ho, Ta-Cheng;Kao, Chen-Shan
通讯作者:
Kao, Chen-Shan
DOI:
--
发表时间:
1990
期刊:
影响因子:
--
作者:
R. Wool
通讯作者:
R. Wool
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
M. Guyader;L. Audouin;X. Colin;J. Verdu;S. Chevalier
通讯作者:
S. Chevalier
影响因子:
2.9
作者:
Huang, Bin;Singamneni, Sarat
通讯作者:
Singamneni, Sarat