Thermal annealing effects on the mechanical properties of bio-based 3D printed thermosets

被引:4
|
作者
Cortes-Guzman, Karen P. [1 ]
Parikh, Ankit R. [2 ]
Sparacin, Marissa L. [1 ]
Johnson, Rebecca M. [1 ]
Adegoke, Lauren [4 ]
Ecker, Melanie [4 ]
Voit, Walter E. [2 ,3 ]
Smaldone, Ronald A. [1 ,3 ]
机构
[1] Univ Texas Dallas, Dept Chem & Biochem, 800 West Campbell Rd, Richardson, TX 75080 USA
[2] Univ Texas Dallas, Dept Mech Engn, 800 West Campbell Rd, Richardson, TX 75080 USA
[3] Univ Texas Dallas, Dept Mat Sci & Engn, 800 West Campbell Rd, Richardson, TX 75080 USA
[4] Univ North Texas, Dept Biomed Engn, 1155 Union Circle 310440, Denton, TX 75203 USA
关键词
EPOXY VITRIMERS; CROSS-LINKING; VANILLIN; TRANSESTERIFICATION; POLYMER; TEMPERATURE; RESIN; OIL;
D O I
10.1039/d3py00200d
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
3D printing technologies can address many sustainability aspects of creating new materials, such as reduced waste and on demand production, which reduces the carbon footprint of transport and storage. Additionally, creating bio-based resins for 3D printing is a viable way of improving the sustainability of polymeric materials. Coupled with this, by using dynamic covalent chemistry (DCC), we can provide materials with smart properties like self-healing or reprocessability to either extend their usable lifetime or provide an alternative to the materials ending up in a landfill. Here, we report a series of completely bio-based aromatic resins for digital light projection (DLP) printing. By incorporating beta-hydroxyesters and a zinc catalyst, the polymer networks can participate in transesterification reactions to provide self-healing capabilities or reprocessability. The self-healing abilities of these materials were characterized using optical microscopy, and the reprocessability using a hot-press. Additionally, by subjecting the printed thermosets to thermal annealing, considerable changes in the mechanical performance were observed leading to more than a 2000% increase in the Young's modulus. The thermal behavior after annealing was also studied and a discussion on the effect of the structural differences between the aromatic monomers is proposed. These resin formulations address two of the key goals of sustainable materials: using renewable resources and obtaining recyclable materials while remaining competitive through their mechanical performance and compatibility with 3D printing technologies.
引用
收藏
页码:2697 / 2707
页数:11
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