PAA-based nanocomposite hydrogels (VSNPs-PAA) were synthesized through free radical copolymerization by using self-made vinyl hybrid silica nanospheres (VSNPs) as crosslinking agent,and acrylic acid (AA) as monomer.The effect of the content of silica microspheres on the swelling performance of the hydrogel was studied.The swelling rate of the hydrogel can exceed 5000g/g at 50℃ when the content of the microspheres was about 0.7%.The swelling performance of the hydrogel in different concentrations of salt and urea solutions and different pH solutions was also discussed.It was characterized by fourier transform infrared spectrometer (FT-IR),transmission electron microscopy (TEM) and scanning electron microscope (SEM).
Chen Mingyang, Shen Yong, Xu Lihui
. Preparation and swelling of superabsorbent PAA-based nanocomposite hydrogel[J]. New Chemical Materials, 2021
, 49(12)
: 183
-188
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.12.039
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