No Such Thing as Trash: A 3D-Printable Polymer Composite Composed of Oil-Extracted Spent Coffee Grounds and Polylactic Acid with Enhanced Impact Toughness

被引：54

作者：

Chang, Yu-Chung ^{[1
]}

Chen, Yao ^{[1
]}

Ning, Jialong ^{[1
]}

Hao, Cheng ^{[1
]}

Rock, Mitch ^{[1
]}

Amer, Maher ^{[1
]}

Feng, Shuo ^{[1
]}

Falahati, Mojtaba ^{[1
]}

Wang, Li-Ju ^{[1
]}

Chen, Roland K. ^{[1
]}

Zhang, Jinwen ^{[1
]}

Ding, Jow-Lian ^{[1
]}

Li, Lei ^{[1
]}

机构：

[1] Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA

来源：

ACS SUSTAINABLE CHEMISTRY & ENGINEERING | 2019年 / 7卷 / 18期

关键词：

additive manufacturing; 3D printing polymer composite; dynamic compression; split Hopkinson bar test; IN-SITU TRANSESTERIFICATION; HIGH-DENSITY POLYETHYLENE; MECHANICAL-PROPERTIES; PLA; NANOCOMPOSITES; NANOPARTICLES; MORPHOLOGY; BEHAVIOR; FIBERS;

D O I：

10.1021/acssuschemeng.9b02527

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

As one of the most popular beverages in the world, a large amount of coffee wastes known as the spent coffee grounds (SCGs) is generated daily. In this study, we report a polylactic acid (PLA) composite filament with a high loading of oil-extracted spent coffee grounds (Ox-SCGs) up to 20% by weight and is three-dimensional (3D)-printable with a commercially available consumer-level 3D printer. The Ox-SCG-loaded PLA was found to be able to increase impact energy absorption. As a result, the PLA/Ox-SCG composite exhibited a 418.7% increase in toughness with a measure of 25.24 MJ/m(3) at a 20 wt % Ox-SCG loading and only a 26% storage modulus reduction from the 100% PLA specimens at room temperature. The experimental results indicate that as a waste product from human consumptions and post biodiesel extraction, the Ox-SCG is proven to be a promising additive for composite property modification. The Ox-SCG can not only increase the impact toughness but also reduce the cost of overall 3D-printing materials.

引用

页码：15304 / 15310

页数：13

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