期刊
CARBOHYDRATE POLYMERS
卷 94, 期 1, 页码 449-455出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.01.019
关键词
Superporous hydrogel; SDS micelle templating; Sodium alginate; Morphology; Swelling kinetics
资金
- National Natural Science Foundation of China [20877077]
- Key Laboratory of Chemistry of Northwestern Plant Resources, China Academy of Sciences [CNPR2010kfkt01]
A novel sodium alginate-based superporous hydrogel (SPH) was prepared by the grafting copolymerization and micelle templating formed by the self-assembled anionic surfactant sodium n-dodecyl sulfonate (SDS). Fourier transform infrared (FTIR) spectra demonstrated that SDS was removed from the final hydrogel network. The formation mechanism of NaAlg-based SPH was proposed. Effect of SDS concentration on the morphologies and pore structure of the hydrogel was evaluated by Scanning Electron Microscopy (SEM), and the SDS-1.92 mM sample displays homogeneous and well-defined pores, which contribute to improve swelling ratio and swelling rate. The time-dependent swelling behaviors of the SDS-1.92 mM samples in various salt and pH solutions were investigated. The swelling in multivalent salt (Ca2+, Al3+)/pH 2 solutions displayed a well-known overshooting effect, whereas, its swelling kinetics in Na+/pH 3-12 solutions followed Schott's pseudo second-order swelling kinetics model. (C) 2013 Elsevier Ltd. All rights reserved.
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