Preparation and characterization of sodium alginate/poly(<Emphasis Type="Italic">N</Emphasis>-isopropylacrylamide)/clay semi-IPN magnetic hydrogels |
| |
Authors: | Zhiqiang?Li Jianfeng?Shen Hongwei?Ma Xin?Lu Min?Shi Na?Li Email author" target="_blank">Mingxin?YeEmail author |
| |
Affiliation: | (1) Center of Special Materials and Technology, Fudan University, 220 Handan Road, Shanghai, 200433, China; |
| |
Abstract: | pH- and temperature-responsive semi-interpenetrating magnetic nanocomposite hydrogels (NC hydrogels) were prepared by using
linear sodium alginate (SA), poly(N-isopropylacrylamide) (PNIPAM) and Fe3O4 nanoparticles with inorganic clay as an effective multifunctional cross-linker. The effects of cross-linker and SA contents
on various physical properties were investigated. The NC hydrogels exhibited a volume phase transition temperature (VPTT)
around 32 °C with no significant deviation from the conventional chemically cross-linked PNIPAM hydrogels (OR hydrogels).
The swelling ratios of NC hydrogels were much larger than those of OR hydrogels. Moreover, the swelling ratios of NC hydrogels
gradually decreased with increasing the contents of clay and increased with increasing the contents of SA. The pH sensitivity
of NC hydrogels was evident below their VPTT. The NC hydrogels had a much better mechanical property than the OR hydrogels.
The results showed that the incorporation of clay did not affect the saturation magnetization of the hydrogels. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|