Electrical and mechanical tuning of 3D printed photopolymer-MWCNT nanocomposites through in situ dispersion
Electrical and mechanical tuning of 3D printed photopolymer-MWCNT nanocomposites through in situ dispersion
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DOI：
10.1002/app.47600
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发表时间：
2019-06-10
影响因子：
3
通讯作者：
Lin, Yirong
中科院分区：
文献类型：
--
作者：
Chavez, Luis A.;Regis, Jaime E.;Lin, Yirong
通过立体光刻三维（3D）打印技术制备了多壁碳纳米管（MWCNTs）在聚合物纳米复合材料中的电场辅助原位分散。MWCNTs的引入使聚合物树脂的弹性模量提高了77%。此外，电场用于原位MWCNTs分散有助于将MWCNTs样品的平均断裂伸长率提高32%。电场也使MWCNT增强纳米复合材料的极限拉伸强度提高了42%。原位分散MWCNT纳米复合材料的极限拉伸强度比纯聚合物材料提高了20%以上。最后，研究表明，在3D打印过程中，可以通过原位电场的应用来设计MWCNT纳米复合材料的导电性大小和方向。当引入MWCNTs时，电导率提高了50%，而电场的应用使电导率进一步提高了26%。研究结果表明，利用原位电场辅助3D打印技术，可以调整MWCNT增强聚合物纳米复合材料的电学和力学性能。(c) 2019 Wiley期刊公司j:。变异较大。自然科学学报，2019,36(4):476 - 476。
An electric field-assisted in situ dispersion of multiwall carbon nanotubes (MWCNTs) in polymer nanocomposites, fabricated through stereolithography three-dimensional (3D) printing technique, was demonstrated. The introduction of MWCNTs increased the elasticity modulus of the polymer resin by 77%. Furthermore, the use of an electric field for in situ MWCNT dispersion helped improving the average elongation at break of the samples with MWCNTs by 32%. The electric field also increased the ultimate tensile strength of the MWCNT reinforced nanocomposites by 42%. An increase of over 20% in the ultimate tensile strength of in situ dispersed MWCNT nanocomposites over the pure polymer material was observed. Finally, it was demonstrated that the magnitude and direction of the electrical conductivity of MWCNT nanocomposites can be engineered through the application of in situ electric fields during 3D printing. An increase of 50% in the electrical conductivity was observed when MWCNTs were introduced, while the application of the electric field further improved the electrical conductivity by 26%. The presented results demonstrated the feasibility of tuning both electrical and mechanical properties of MWCNT reinforced polymer nanocomposites using in situ electrical field-assisted 3D printing. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47600.