Novel Polymeric Flocculants Based on Polyacrylamide Grafted Dextran in Kaolin Suspension

被引：13

作者：

Krishnamoorthi, S. ^{[1
]}

Adhikary, P. ^{[1
]}

Mal, D. ^{[2
]}

Singh, R. P. ^{[3
]}

机构：

[1] Banaras Hindu Univ, Dept Chem, Varanasi 221005, Uttar Pradesh, India

[2] Indian Inst Technol, Dept Chem, Kharagpur 721302, W Bengal, India

[3] Indian Inst Sci Educ & Res, Pune 411021, Maharashtra, India

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2010年 / 118卷 / 06期

关键词：

dextran; flocculation; graft copolymer; solution polymerization; COPOLYMER; PERFORMANCE;

D O I：

10.1002/app.32716

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A study is done on ceric-ammonium-nitrate (CAN) initiated graft copolymerization of polyacrylamide (PAM) on to dextran (Dx) by solution polymerization technique. The average molecular weight of dextran is 7.0 x 10(-6) g/mole. By changing the concentrations of the initiator in the reaction feed, a series of graft copolymer (Dx-g-PAM1 to Dx-g-PAM4) with variation in the number and length of the grafted PAM chains are obtained. The flocculation characteristics of various polymers are investigated by the use of settling tests in 2 wt % using kaolin suspensions. Among the series of graft copolymers, the one with highest molecular weight shows superior performance. The flocculation characteristics of the best-performing graft copolymer (Dx-g-PAM3) are compared with those of various commercially available flocculants and PAM in the kaolin suspension. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 3539-3544, 2010

引用

页码：3539 / 3544

页数：6

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