(354a) In Situ Synthesis of Layered Double Hydroxide (LDH)/Polyelectrolyte Intercalation Compounds | AIChE

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(354a) In Situ Synthesis of Layered Double Hydroxide (LDH)/Polyelectrolyte Intercalation Compounds

Authors 

Yu, J. - Presenter, Texas State University- San Marcos
Sun, L., University of Connecticut
SIMS, J. E., Texas State University-San Marcos
Martin, J. C., Texas State University-San Marcos



In
Situ
Synthesis of Layered Double Hydroxide (LDH)/Polyelectrolyte Intercalation
Compounds

Jingfang
Yu, Johnathan E. Sims, Jarett C. Martin, Luyi Sun*

Department of Chemistry and
Biochemistry & Materials Science, Engineering, and Commercialization
Program, Texas State University-San Marcos, San Marcos, TX 78666

Abstract

Two
types of polyelectrolytes: poly(acrylic acid, sodium)
(PAAS) and poly(sodium 4-styrenesulfonate) (PSSS) have been incorporated into the
positively charged sheets of layered double hydroxides (LDH) [M2+1-xM3+x(OH)2]x+[Ap-x/p]x+?mH2O
through an in situ hydrothermal reaction to form layered intercalation
compounds. The synthesized compounds were systematically studied and characterized
by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), transmission
electron microscopy (SEM), and thermogravimetric analysis (TGA). The resultant
compounds exhibited a much higher interlayer distance, which are ca. 20 Å and 19 Å for LDH/PSSS and
LDH/PAAS, respectively, compared with the pristine LDH. The XRD and FT-IR
results were consistent and confirmed the formation of an intercalated
structure. The SEM images showed the morphological changes with different
weight percentages of polyelectrolytes incorporated. The TGA results showed that
the intercalated polyelectrolytes were more thermally stable than the free
polyelectrolytes.

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