文献类型：期刊文献

英文题名：pH-responsive sodium alginate-based superporous hydrogel generated by an anionic surfactant micelle templating

作者：Shi, Xiaoning[1,2];Wang, Wenbo[1,3];Wang, Aiqin[1,3]

第一作者：Shi, Xiaoning;施小宁

通信作者：Wang, AQ[1]

机构：[1]Chinese Acad Sci, Lanzhou Inst Chem Phys, R&D Ctr Xuyi Attapulgite Appl Technol, Lanzhou 730000, Peoples R China;[2]Gansu Univ Tradit Chinese Med, Lanzhou 730000, Peoples R China;[3]Chinese Acad Sci, Key Lab Chem Northwestern Plant Resources, Lanzhou 730000, Peoples R China

第一机构：Chinese Acad Sci, Lanzhou Inst Chem Phys, R&D Ctr Xuyi Attapulgite Appl Technol, Lanzhou 730000, Peoples R China

通信机构：[1]corresponding author), Chinese Acad Sci, Lanzhou Inst Chem Phys, R&D Ctr Xuyi Attapulgite Appl Technol, Lanzhou 730000, Peoples R China.

年份：2013

卷号：94

期号：1

起止页码：449

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20131516190241);Scopus(收录号：2-s2.0-84874119195);WOS:【SCI-EXPANDED(收录号:WOS:000317888500061)】；

基金：The authors gratefully acknowledge jointly supporting of this research by the National Natural Science Foundation of China (No. 20877077) and the Open Fund of the Key Laboratory of Chemistry of Northwestern Plant Resources, China Academy of Sciences (No. CNPR2010kfkt01).

语种：英文

外文关键词：Superporous hydrogel; SDS micelle templating; Sodium alginate; Morphology; Swelling kinetics

摘要：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.