Title: POLYACRYLATE/(CHITOSAN MODIFIED MONTMORILLONITE) NANOCOMPOSITE: WATER ABSORPTION AND PHOTOSTABILITY
Page Range: p.167-172
Author(s): Haixia Qiu; Jiungao Yu; Junli Zhu
File size: 117K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 13
Issue No: No. 2
Abstract
It is known that the water absorption of polyacrylate (PAA)-based superabsorbent polymers decreases in sunlight after a long time. To reduce this, polymer/montmorillonite (MMT) nanocomposites have been developed with photostability. However, the preparation of PPA/MMT nanocomposites is reported to be difficult because it is not easy for PAA to intercalate into MMT sheets. The modification of MMT with hydrophilic molecules is therefore necessary. Montmorillonite was modified with chitosan to facilitate intercalation. It was found that the water absorption of the PAA/modified MMT composite increased by 91 g/g. FTIR analysis identified that the drive for intercalation could arise from the strong interaction between chitosan and MMT. 20 refs.
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