title: Preparation and properties of organic-inorganic composite superabsorbent based on xanthan gum and loess.
abstract: A new, low-cost, and eco-friendly organic-inorganic composite superabsorbent was successfully synthesized in aqueous solution by polymerization xanthan gum (XG), neutralized acrylic acid (AA) and loess using ammonium persulfate (APS) as initiator and N,N-methylenebisacrylamide (MBA) as crosslinker. Structure and morphological characterizations of the composite superabsorbent were investigated by Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The loess content, pH values, surfactants, salts and temperature which could affect the swelling and water-retention capabilities of the composite superabsorbent were investigated. The composite superabsorbent exhibits excellent water absorbency (610 g/g in distilled water), pH-stability (pH 5-10), and higher swelling capacity in anionic surfactant solution; on the other hand, the composite superabsorbent can be used for removing multivalent metal ions.
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Enke
authors.initials: E
authors.lastname: Feng
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. Electronic address: magf@nwnu.edu.cn.
authors.forename: Guofu
authors.initials: G
authors.lastname: Ma
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Yajuan
authors.initials: Y
authors.lastname: Wu
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
authors.forename: Haiping
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, Key Laboratory of Polymer Materials of Gansu Province, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China. Electronic address: leizq@nwnu.edu.cn.
authors.forename: Ziqiang
authors.initials: Z
authors.lastname: Lei
mesh_terms: D000178:Acrylamides / Q000737:chemistry; D000179:Acrylates / Q000737:chemistry; D017607:Aluminum Compounds / Q000737:chemistry*; D000645:Ammonium Sulfate / Q000737:chemistry; D003432:Cross-Linking Reagents / Q000737:chemistry; D017616:Magnesium Compounds / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D058105:Polymerization; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry; D014867:Water / Q000737:chemistry*; D017155:Wettability
chemical_list: D000178:Acrylamides; D000179:Acrylates; D017607:Aluminum Compounds; D003432:Cross-Linking Reagents; D017616:Magnesium Compounds; D011135:Polysaccharides, Bacterial; D017640:Silicates; D013501:Surface-Active Agents; D014867:Water; C031276:ammonium peroxydisulfate; C033065:aluminum magnesium silicate; C021221:N,N'-methylenebisacrylamide; C036658:acrylic acid; D000645:Ammonium Sulfate; C002563:xanthan gum
keywords: Composite superabsorbent; Loess; Swelling–deswelling; Water absorbency; Xanthan gum