Ultrathin and Stable Active Layer of Dense Composite Membrane Enabled by Poly(dopamine)

	Ultrathin and Stable Active Layer of Dense Composite Membrane Enabled by Poly(dopamine)
	Li, B; Liu, WP; Jiang, ZY; Dong, X; Wang, BY; Zhong, YR; Wang BY(王宝义); Zhong YR(钟玉荣)
刊名	LANGMUIR
	2009
卷号	25 期号:13 页码:7368-7374
通讯作者	[Jiang, Zhongyi] Tianjin Univ, Minist Educ, Key Lab Green Chem Technol, China Sch Chem Engn & Technol, Tianjin 300072, Peoples R China ; [Wang, Baoyi ; Zhong, Yurong] Chinese Acad Sci, Inst High Energy Phys, Key Lab Nucl Anal Tech, Beijing 100049, Peoples R China
英文摘要	We demonstrate that dopamine is able to self-polymerize and adhere firmly onto the substrate, which can create a hierarchical structure comprising an ultrathin active layer and a porous support layer. Such an approach opens a novel way to fabricating highly efficient and stable composite materials including composite membranes. More specifically, in this study the composite membranes are fabricated by simply dipping microporous substrate in aqueous dopamine solution under mild conditions. Nanoindentation measurement reveals the tight adhesion of dopamine onto microporous substrate, which is ascribed to numerous pi-pi and hydrogen-bonding interactions. The chemical composition of the active layer is analyzed by XPS, which demonstrates the self-polymerization of dopamine. The water contact angle of the dopamine coated membranes is reduced remarkably compared with that of the uncoated counterpart. Stylus profiler measurements display that the poly(dopamine) thickness increases as the coating time increases. FESEM images of the membranes' cross section show that an active layer (< 100 nm) is deposited on the porous polysulfone (PS) Substrate. Positron annihilation spectroscopy (PAS) is introduced to probe the fractional free volume properties throughout the cross section of the composite membranes and reveal that after dopamine double-coating the active layer becomes thicker and more compact. Moreover, pH and concentration of the dopamine solution exert notable influence on the Fractional free volume of the composite membranes. The as-prepared membranes are tentatively employed for pervaporative desulfurization and exhibits satisfying separation performance as well as durability. This facile, versatile, and efficient approach enables a promising prospect for the wide applications of such novel kinds of ultrathin composite materials.
学科主题	Chemistry; Materials Science
类目[WOS]	Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
研究领域[WOS]	Chemistry ; Materials Science
原文出处	SCI
语种	英语
WOS记录号	WOS:000267533800034
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240114]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Li, B,Liu, WP,Jiang, ZY,et al. Ultrathin and Stable Active Layer of Dense Composite Membrane Enabled by Poly(dopamine)[J]. LANGMUIR,2009,25(13):7368-7374.
APA	Li, B.,Liu, WP.,Jiang, ZY.,Dong, X.,Wang, BY.,...&钟玉荣.(2009).Ultrathin and Stable Active Layer of Dense Composite Membrane Enabled by Poly(dopamine).LANGMUIR,25(13),7368-7374.
MLA	Li, B,et al."Ultrathin and Stable Active Layer of Dense Composite Membrane Enabled by Poly(dopamine)".LANGMUIR 25.13(2009):7368-7374.