Synthesis,Characterization and Application of Palygorskite/Polyacrylamide Inorganic-organic Hybrid Flocculent

Abstract

Abstract: Acid-activated palygorskite(PGS) reacted with ethanolamine hydrochloride(EACl),and the modified palygorskite(PGS-EACl) was obtained. The polymerization of acrylamide was initiated by heterogeneous redox initiator system, composed of reductive agent PGS-EACl together with oxidant Ce⁴⁺,and the palygorskite/polyacrylamide(PGS/PAM) hybrid was obtained. The product was characterized by ¹H NMR,FTIR,viscosimetry and specific conductivity method,and the result showed an abnormal viscosity and conductivity behavior in water. It can be interpreted in terms of ion bond structure(PGS^Θ⊕ NH₃R) in PGS/PAM hybrid. The influence of dosage of PGS-EACl, polymerization time,and monomer concentration on the [ η ] of the PGS/PAM hybrid was investigated,and it is found that the [ η ] of the hybrid increases with increasing polymerization time differing from conventional free-radical polymerization. Flocculating effect of PGS/PAM hybrid was better than that of pure PAM for both mass fraction 0.25% kaolin suspension and mass fraction 0.5% hematite suspension,respectively.

Key words: Inorganic-organic hybrid, Palygorskite, Polyacrylamide, Flocculent

CLC Number:

TrendMD:

WANG Meng, QIAN Jin-Wen, ZHENG Bao-Qing, YANG Wu-Yuan, JIANG Wei-Feng, FANG Zuo, YE Ying . Synthesis,Characterization and Application of Palygorskite/Polyacrylamide Inorganic-organic Hybrid Flocculent[J]. Chem. J. Chinese Universities, 2004, 25(8): 1567.

References

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