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General Suspended Printing Strategy toward Programmatically Spatial Kevlar Aerogels.

Qingqing Cheng1,2, Zhizhi Sheng2, Yongfeng Wang2

  • 1School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, P. R. China.

ACS Nano
|March 1, 2022
PubMed
Summary

A new microgel-directed suspended printing (MSP) method enables on-demand fabrication of complex 3D aerogels. This technique offers excellent printability and programmability for diverse aerogel materials, opening new application possibilities.

Keywords:
Kevlaraerogelmicrogel matrixsuspended printingthermal insulation

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Additive Manufacturing

Background:

  • Aerogels are nanoporous materials with broad applications but are difficult to shape.
  • Current methods lack the capacity for on-demand conformal shaping of aerogels.

Purpose of the Study:

  • To develop a universal strategy for fabricating 3D aerogels with arbitrary spatial structures.
  • To demonstrate the on-demand shaping capacity of aerogels using a novel printing technique.

Main Methods:

  • A microgel-directed suspended printing (MSP) strategy was developed.
  • Rational design of microgel matrices and Kevlar nanofiber inks for printing.
  • High-speed printing mode (up to 167 mm s-1) was employed.

Main Results:

  • Fabrication of Kevlar aerogels with arbitrary spatial structures and excellent printability.
  • Demonstration of superior thermal insulation of custom-tailored Kevlar aerogel insulators in harsh environments (-30 °C).
  • Successful fabrication of diverse 3D aerogel architectures (organic, inorganic, and hybrid).

Conclusions:

  • The MSP strategy is universal for fabricating various customized aerogels.
  • This approach enables the development of aerogels with truly arbitrary architectures.
  • The developed method stimulates inspiration for wider aerogel applications.