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Superabsorbent Nanocomposite (superabsorbent + nanocomposite)

Distribution by Scientific Domains
Polymers and Materials Science100%

Selected Abstracts

Polyacrylate/(carboxymethylcellulose modified montmorillonite) superabsorbent nanocomposite: Preparation and water absorbency

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 1 2008
Haixia Qiu
Abstract Montmorillonite (MMT) was modified with carboxymethylcellulose (CMC). The X-ray diffraction (XRD) and FTIR analyses showed that the CMC chains had intercalated into the MMT sheets, and the strong chemical interaction between the ether bonds from CMC and SiO bonds from MMT was the driving force for intercalation. Polyacrylate (PAA)/modified MMT superabsorbent nanocomposites were fabricated by effectively dispersing the modified MMT in acrylic acid solution and polymerizing the acid. The superabsorbent composites were characterized by XRD, TEM, and FTIR. The influence of modified MMT, weight ratio of CMC to MMT, and modified MMT content in the nanocomposites on the water absorbency was investigated. Results showed that the introduction of pure MMT could decrease the water absorbency of the gel, but adding modified MMT could not only effectively increase the water absorbency of the gel, but also improve its water retention ability. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source]

The preparation and properties of dextrin-graft-acrylic acid/montmorillonite superabsorbent nanocomposite

POLYMER COMPOSITES, Issue 7 2009
Xin Ding
A novel superabsorbent nanocomposite was synthesized through intercalation polymerization of partially neutralized acrylic acid, gelatinized dextrin, and an organic-montmorillonite powder using N,N -methylenebisacrylamide as a crosslinker, Span-60 as a dispersant, and ammonium persulfate together with sodiumsulfite as a type of mixed redox initiator. Effects of the amount of them on water absorbency of the superabsorbent were investigated. The structure and the morphology of the nanocomposite were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and transmission electron microscopy analysis. The blood compatibility of the composite was primarily measured. The results show that the acrylic acid monomer was successfully intercalated into the organic-montmorillonite layers and bonded with them. The superabsorbent nanocomposite synthesized under optimal conditions with an organic-montmorillonite powder content of 5 wt% exhibit an absorption of 725.3 g/g in distilled water and favorable blood compatibility. POLYM. COMPOS., 2009. © 2008 Society of Plastics Engineers [source]

Polyacrylate/(carboxymethylcellulose modified montmorillonite) superabsorbent nanocomposite: Preparation and water absorbency

JOURNAL OF APPLIED POLYMER SCIENCE, Issue 1 2008
Haixia Qiu
Abstract Montmorillonite (MMT) was modified with carboxymethylcellulose (CMC). The X-ray diffraction (XRD) and FTIR analyses showed that the CMC chains had intercalated into the MMT sheets, and the strong chemical interaction between the ether bonds from CMC and SiO bonds from MMT was the driving force for intercalation. Polyacrylate (PAA)/modified MMT superabsorbent nanocomposites were fabricated by effectively dispersing the modified MMT in acrylic acid solution and polymerizing the acid. The superabsorbent composites were characterized by XRD, TEM, and FTIR. The influence of modified MMT, weight ratio of CMC to MMT, and modified MMT content in the nanocomposites on the water absorbency was investigated. Results showed that the introduction of pure MMT could decrease the water absorbency of the gel, but adding modified MMT could not only effectively increase the water absorbency of the gel, but also improve its water retention ability. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source]