AO-resistant shape memory polyimide/silica composites with excellent thermal stability and mechanical properties

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > 先进润滑与防护材料研究发展中心

	AO-resistant shape memory polyimide/silica composites with excellent thermal stability and mechanical properties
	Yang ZH(杨增辉)1,2 ; Wang QH(王齐华)1 ; Bai YK(白永康)1,2 ; Wang TM(王廷梅)1 ; Wang QH(王齐华)
刊名	RSC ADVANCES
	2015
卷号	5 期号:89 页码:72971-72980
ISSN号	2046-2069
通讯作者	王齐华
英文摘要	Shape memory polyimide/silica (PI/silica) composites with atomic oxygen resistance, good thermal stability and mechanical properties are synthesized by co-condensation of poly(amic acid) terminated with (3-aminopropy)triethoxysilane (APTES) and tetraethoxysliane (TEOS) via a sol-gel method. The silica networks formed in the hybrid films act not only as permanent crosslink points, but as atomic oxygen (AO) resistant moieties. The results show that the PI/silica composite films possess high thermal decomposition temperature (T_d > 550 ℃), high glass transition temperature (T_g > 265 ℃) as well as good shape fixation ratio (R_f > 98%) and shape recovery ratio (R_r > 90%). The mechanical properties, surface topography and shape memory performance of PI/silica composite films were evaluated before and after AO irradiation in simulated space environment. Compared to pristine PI, the mechanical properties, surface topography, and shape memory performances of PI-SiO₂-15 were less affected by AO exposure, which results from the silica protective layer formed on the composite film surface, indicating good AO-resistant ability of PI/silica composite films. This work may provide a strategy toward the design of promising shape memory materials for applications in the field of severe conditions.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Basic Research Program of China (973 Program, Grant No. 2015CB057502;the National Defense Innovation Fund of Chinese Academy of Sciences (CXJJ-14-M43);the National Natural Science Foundation of China (Grant 51305431)
语种	英语
WOS记录号	WOS:000360552000062
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/18597]
专题	兰州化学物理研究所_先进润滑与防护材料研究发展中心兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Wang QH(王齐华)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Yang ZH,Wang QH,Bai YK,et al. AO-resistant shape memory polyimide/silica composites with excellent thermal stability and mechanical properties[J]. RSC ADVANCES,2015,5(89):72971-72980.
APA	Yang ZH,Wang QH,Bai YK,Wang TM,&王齐华.(2015).AO-resistant shape memory polyimide/silica composites with excellent thermal stability and mechanical properties.RSC ADVANCES,5(89),72971-72980.
MLA	Yang ZH,et al."AO-resistant shape memory polyimide/silica composites with excellent thermal stability and mechanical properties".RSC ADVANCES 5.89(2015):72971-72980.