Synthesis and swelling properties of corn stalk-composite superabsorbent

Authors

  • Tao Wan,

    Corresponding author
    1. State Key Lab of Geohazard Prevention & Geoenvironment Protection, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    2. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    • State Key Lab of Geohazard Prevention & Geoenvironment Protection, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Runqiu Huang,

    1. State Key Lab of Geohazard Prevention & Geoenvironment Protection, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Qihua Zhao,

    1. State Key Lab of Geohazard Prevention & Geoenvironment Protection, College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Lei Xiong,

    1. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Lei Luo,

    1. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Xuemei Tan,

    1. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author
  • Guojun Cai

    1. Mineral Resources Chemistry Key Laboratory of Sichuan Higher Education Institutions, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China
    Search for more papers by this author

Abstract

A corn stalk-composite superabsorbent with water absorbency of 660 g/g within 30 min, was prepared by graft copolymerization with acrylic acid (AA), acrylamide (AM), sodium 4-styrenesulfonate (SSS), and corn stalk in aqueous solution after the pretreatment of corn stalks (CS), using N,N-methylenebisacrylamide (MBA) as a crosslinker and ammonium persulfate (APS) and sodium bisulfite (SBS) as redox initiators. Factors influencing water absorbency and gel strength of the superabsorbent composite, such as the amount of corn stalk, the mass ratio of acrylic acid to acrylamide, the degree of neutralization for AA and the amount of crosslinker, were investigated. Morphologies and structure of the corn stalk-composite superabsorbents were characterized by FTIR, SEM and optical microscope. FTIR spectra indicate the structure of corn stalk graft-copolymer. SEM data show that the discontinuous sheet structures of corn stalks disappear and gel aggregates with many large microporous holes and small capillary pores are formed after corn stalk graft modification. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

Ancillary