Scholarlink

<p>3D printable silicones can be designed with varying crosslink density, network structures, and types of reinforcing additives. Within this design space, one may tailor the uncured material’s rheology and mechanical response to access a wide range of potential applications. However, printable, low modulus silicones, particularly those applicable to direct ink write, are underreported in published literature. To address the need for higher performance, low modulus silicones with demonstrated printability, a new set of ca. 20–50 Shore A hardness silicone elastomers exhibiting ca. 7&#xa0;MPa ultimate tensile strength and ca. 400–1200% elongation at break is presented. Mechanical properties were analyzed, providing insight to the effects of formulation constituents on mechanical properties. Cyclic mechanical testing of the silicone formulations was also performed, and the energy loss and permanent set throughout cycling were determined. Printed structures demonstrate the feasibility of these new silicones as durable frameworks for novel soft device applications.</p> Graphical abstract <p></p>

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3D printable silicone compositions exhibiting high toughness and low durometer

  • 期刊论文

  • 发表日期：

    2025年5月13日

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  • Spencer C. Schmidt,
  • Jake J. Grondz,
  • Michael J. Ford,
  • Jeremy A. Armas,
  • Andrew D. Alexopoulos,
  • Joshua T. Mendoza,
  • Colin K. Loeb,
  • Jeremy M. Lenhardt

摘要

3D printable silicones can be designed with varying crosslink density, network structures, and types of reinforcing additives. Within this design space, one may tailor the uncured material’s rheology and mechanical response to access a wide range of potential applications. However, printable, low modulus silicones, particularly those applicable to direct ink write, are underreported in published literature. To address the need for higher performance, low modulus silicones with demonstrated printability, a new set of ca. 20–50 Shore A hardness silicone elastomers exhibiting ca. 7 MPa ultimate tensile strength and ca. 400–1200% elongation at break is presented. Mechanical properties were analyzed, providing insight to the effects of formulation constituents on mechanical properties. Cyclic mechanical testing of the silicone formulations was also performed, and the energy loss and permanent set throughout cycling were determined. Printed structures demonstrate the feasibility of these new silicones as durable frameworks for novel soft device applications.

Graphical abstract