Effect of Octa(aminophenyl) Polyhedral Oligomeric Silsesquioxane Functionalized Graphene Oxide on the Mechanical and Dielectric Properties of Polyimide Composites

Autor:	Sheng-Tsung Hsiao, Shi-Jun Zeng, Shin-Ming Li, Hsi-Wen Tien, Shin-Yi Yang, Yu-Sheng Wang, Chen-Chi M. Ma, Wei-Hao Liao
Rok vydání:	2014
Předmět:	Materials science Oxide Young's modulus Dielectric Silsesquioxane chemistry.chemical_compound symbols.namesake chemistry Covalent bond Ultimate tensile strength symbols General Materials Science In situ polymerization Composite material Polyimide
Zdroj:	ACS Applied Materials & Interfaces. 6:15802-15812
ISSN:	1944-8252 1944-8244
DOI:	10.1021/am504342j
Popis:	An effective method is proposed to prepare octa(aminophenyl) silsesquioxane (OAPS) functionalized graphene oxide (GO) reinforced polyimide (PI) composites with a low dielectric constant and ultrastrong mechanical properties. The amine-functionalized surface of OAPS-GO is a versatile starting platform for in situ polymerization, which promotes the uniform dispersion of OAPS-GO in the PI matrix. Compared with GO/PI composites, the strong interfacial interaction between OAPS-GO and the PI matrix through covalent bonds facilitates a load transfer from the PI matrix to the OAPS-GO. The OAPS-GO/PI composite film with 3.0 wt % OAPS-GO exhibited an 11.2-fold increase in tensile strength, and a 10.4-fold enhancement in tensile modulus compared with neat PI. The dielectric constant (D(k)) decreased with the increasing content of 2D porous OAPS-GO, and a D(k) value of 1.9 was achieved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ceaa0384778a9163d8f50e992122eda0 https://doi.org/10.1021/am504342j Zobrazit plný text záznamu