Paper Title:
Effects of Atomic Oxygen Irradiation on PDMS/POSS Hybrid Films in Low Earth Orbit Environment
  Abstract

In order to improve the atomic oxygen (AO) erosion resistance of polyimide films in low earth orbit space environment, a type PDMS/POSS hybrid coating on polyimide substrate was prepared based on a silanol terminated polydimethylsiloxane (PDMS-OH) and Octakis(trimethylsiloxy)octaprismosilsesquioxane (Q8[Si(CH3)3]8) by copolymerizing process in DMAc solution. The atomic oxygen exposure tests were carried out using a ground-based atomic oxygen simulation facility. The mass loss, surface morphology and surface chemical compositions of PDMS/POSS hybrid films before and after exposure to incremental AO flux were investigated by using microbalance and field emission scanning electron microscopy (FE-SEM) and X-ray photoelectron spectroscopy (XPS), respectively. The data indicated that a silica-rich layer was formed on the surface of the hybrid coating when the coating is exposed to AO flux, which could provide a protective barrier on the surface preventing further degradation of the polymer during extended exposure to AO and obviously improved the AO resistance of polyimide films.

  Info
Periodical
Advanced Materials Research (Volumes 239-242)
Edited by
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages
1368-1371
DOI
10.4028/www.scientific.net/AMR.239-242.1368
Citation
M. M. Song, S. W. Duo, T. Z. Liu, "Effects of Atomic Oxygen Irradiation on PDMS/POSS Hybrid Films in Low Earth Orbit Environment", Advanced Materials Research, Vols. 239-242, pp. 1368-1371, 2011
Online since
May 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Wei Bo Huang, Ping Lu, Jing Zhang, Xin Mao Li
Abstract:Coating protection becomes the primary and available method for the protection of marine concrete. Aliphatic polyurea is a new genre of...
1010
Authors: Guo Li, Jin Zhu Tan, Jian Ming Gong
Abstract:The long term stability and durability of gaskets made of silicone rubber in proton exchange membrane fuel cell (PEMFC) has important effect...
741
Authors: S. Nurul Atikah, Norinsan Kamil Othman, Azman Jalar
Chapter 3: Metal and Alloy
Abstract:A plate of Fe-30Cr (wt%) were subjected to isothermal furnace at 600 °C in flowing CO2 gas at total pressure of approximately 1 atm. The...
165
Authors: Hai Qiang Wang, Takeshi Osaki, Yukiko Nakahara, Shi Jie Zhu
Abstract:The purpose of this study was to understand the effects of thermal exposure temperature on residual stress in thermal grown oxide (TGO) on...
27
Authors: Miao Qin Wen, Tao Jiang, Ying Ding
Chapter 4: Biomaterials and Chemical Materials
Abstract:Polyhedral oligemeric silsesquioxanes epoxy (POSS-EP) was prepared from 3-glycidyloxy-propyl-trimethoxysilane (KH-560) and...
199