THE PROTECTIVE EFFECT OF NANO-SILICA/EPOXY FILM FROM THE LOW EARTH ORBIT ENVIRONMENT
Several hazards in the Low Earth Orbit(LEO) space cause damage mostly on the exposed surface of polymer based materials.Neutral particles,especially atomic oxygen,eroded the exposed surface and cyclic temperature variation brung about microcracks,creating the degradation of mechanical performance.To protect the substrate materials from the harmful environment,this research investigated the protective effect of nano-silica/epoxy film under the simulated low earth orbit space environment involving 4?10-4torr high vacuum,200nm ultraviolet radiation,14 thermal cycles ranging from -70 to 100oC,and AO fluence of 2.07?1014atoms/cm2.For the protective film,nano-silica was dispersed in epoxy matrix using calendering equipment.Afterwards,nano-silica/epoxy film was fabricated using a comma roll casting machine.Physical and mechanical changes of the film-protected specimens under the simulated LEO environment were compared to those of no-film-protected specimens.The amount of specimen erosion during the LEO simulation test was analyzed through mass change.Also,the tensile properties before and after exposure to the simulated LEO environment were evaluated in accordance with ASTM D638.The specimens protected by nano-silica/epoxy film showed less surface erosion and decrease in degradation of tensile strength after exposure to the simulated LEO environment.
surface morphology low earth orbit atomic oxygen nano-silica epoxy matrix protective film
Gilsang Son Chun-Gon Kim
Division of Aerospace Engineering,School of Mechanical Aerospace & Systems Engineering,Korea Advanced Institute of Science and Technology,291 Daehak-ro,Yuseong-gu,Daejeon,Republic of Korea
国内会议
SAMPE中国2013先进复合材料制品、原材料、工装及工程应用展览会
上海
英文
1-6
2013-10-29（万方平台首次上网日期，不代表论文的发表时间）