Mechanically Robust Atomic Oxygen-Resistant Coatings Capable of Autonomously Healing Damage in Low Earth Orbit Space Environment

Advanced Materials
Xiaohan WangJunqi Sun

Abstract

Polymeric materials used in spacecraft require to be protected with an atomic oxygen (AO)-resistant layer because AO can degrade these polymers when spacecraft serves in low earth orbit (LEO) environment. However, mechanical damage on AO-resistant coatings can expose the underlying polymers to AO erosion, shortening their service life. In this study, the fabrication of durable AO-resistant coatings that are capable of autonomously healing mechanical damage under LEO environment is presented. The self-healing AO-resistant coatings are comprised of 2-ureido-4[1H]-pyrimidinone (UPy)-functionalized polyhedral oligomeric silsesquioxane (POSS) (denoted as UPy-POSS) that forms hydrogen-bonded three-dimensional supramolecular polymers. The UPy-POSS supramolecular polymers can be conveniently deposited on polyimides by a hot pressing process. The UPy-POSS polymeric coatings are mechanically robust, thermally stable, and transparent and have a strong adhesion toward polyimides to endure repeated bending/unbending treatments and thermal cycling. The UPy-POSS polymeric coatings exhibit excellent AO attack resistance because of the formation of epidermal SiO2 layer after AO exposure. Due to the reversibility of the quadruple hydrogen bonds ...Continue Reading

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Citations

May 14, 2020·Macromolecular Rapid Communications·Shengnan ZhanJunqi Sun
Jan 19, 2021·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Xiaobin LinGuangzhao Zhang
Mar 16, 2021·ACS Applied Materials & Interfaces·D CallegariE Quartarone
Mar 25, 2021·ACS Applied Materials & Interfaces·Ning LuoWeimin Liu
Apr 22, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Hongkun JiangHao Wei
Sep 18, 2021·ACS Applied Materials & Interfaces·Dan WangLei Jiang
Nov 30, 2021·ACS Applied Materials & Interfaces·Yifan ZhangBin Liao

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