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Synthesis and LCST behavior of thermosensitive poly (N-isopropylacrylamide)-clay nanocomposites
- Issue Date
- Jan-2003
- Publisher
- ELSEVIER SCIENCE INC
- Keywords
- nanocomposite; PNIPAM; LCST; thermosensitive polymer
- Citation
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.9, no.1, pp 58 - 62
- Pages
- 5
- Journal Title
- JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
- Volume
- 9
- Number
- 1
- Start Page
- 58
- End Page
- 62
- ISSN
- 1226-086X
1876-794X
- Abstract
- Thermosensitive polymer-clay nanocomposites were prepared via organically modified claypoly(N-isopropylacrylamide) (PNIPAM) nanocomposites. Nanocomposites containing a 5 wt% of montmorillonite exhibited a lower critical solution temperature (LCST) similar to the unmodified PNIPAM hydrogel, and similar phenomena with a large thermal volumetric change and transition kinetics compared to conventional PNIPAM gels. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) suggested that the clay minerals in the nanocomposite were partially exfoliated in a dried state and mostly exfoliated in a swollen state.
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