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

• DOI: 10.1002/adma.201803854
• Publication Date: 2018-07-19T09:07:48Z
• Authors: Xiaohan Wang; Yixuan Li; Yuhai Qian; Hong Qi; Jian Li; Junqi Sun
• Keywords: Atomic oxygen; Space environment

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