Fabrication of polyelectrolyte/amine-modified silica composite thin film by coupling of layer-by-layer assembly and sol–gel techniques

Liu, Huanhuan; Wu, Ren‐Jang; Du, Juan; Nie, Xudong; Xu, Shimei; Wang, Jide

doi:10.1007/s10965-013-0328-9

Cited by 3 publications

(1 citation statement)

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“…Figure 4 displays the FTIR spectrum of the poly(DMAPMA-co-AA)/MMT hydrogel. The peaks at 1037 cm -1 and 567 cm -1 were attributed to the Si-O stretching and Si-O bending vibrations [27]. (Al, Mg)-OH vibration and Al-OH stretching were observed at 765 cm -1 and 604 cm -1 [28].…”

Section: Morphology Of Amphoteric Nanocomposite Hydrogelsmentioning

confidence: 97%

Preparation of amphoteric nanocomposite hydrogel under supercritical carbon dioxide and its fast-swelling behaviours

Nie

et al. 2017

IJNT

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Supercritical carbon dioxide (scCO 2) has been widely used in preparation of nanocomposite materials. However, so far there has been no report on preparation of nanocomposite hydrogels by intercalation of hydrophilic monomers into clay under scCO 2 condition. In this paper, the fast-swelling amphoteric nanocomposite hydrogels were prepared via the free radical polymerisation of acrylic acid (AA) and N-[3-(dimethylamino) propyl] methacrylamide (DMAPMA) in the presence of clay under scCO 2 condition. The composition of the hydrogel was determined by element analysis and Fourier transform infrared spectroscopy (FTIR). Transmission electron microscopy (TEM) and X-ray diffraction (XRD) results illustrated that the clay layers became disordered after intercalation by AA and DMAPMA under scCO 2 condition. The swelling kinetics and deswelling characteristics were tested. The results indicated that the hydrogels presented marked swelling rate in deionised or saline water and fast deswelling rate in alcoholic solution.

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Section: Morphology Of Amphoteric Nanocomposite Hydrogelsmentioning

confidence: 97%