Preparation of cashew gum-based flocculants by microwave- and ultrasound-assisted methods

被引：10

作者：

Klein, Jalma Maria ^{[1
]}

de Lima, Vanessa Silva ^{[1
]}

Couto da Feira, Jose Manoel ^{[1
]}

Camassola, Marti ^{[2
]}

Brandalise, Rosmary Nichele ^{[3
]}

de Camargo Forte, Maria Madalena ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Escola Engn, Lab Mat Polimer, POB 15010, BR-91501970 Porto Alegre, RS, Brazil

[2] UCS, Inst Biotecnol, Lab Enzimas & Biomassas, Caxias Do Sul, RS, Brazil

[3] UCS, Ctr Ciencias Exatas & Tecnol, Lab Polimeros, Caxias Do Sul, RS, Brazil

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2018年 / 107卷

关键词：

Microwave; Ultrasound; Cashew gum; Flocculation; INITIATED SYNTHESIS; G-PAM; SUPERABSORBENT HYDROGELS; GRAFT-COPOLYMERIZATION; GUAR GUM; CHITOSAN; CARBOXYMETHYLSTARCH; POLYMERIZATION; NANOCOMPOSITE; ACRYLAMIDE;

D O I：

10.1016/j.ijbiomac.2017.09.118

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

In this work, copolymers based on cashew gum (CC) grafted with polyacrylamide (PAM) were synthesized by microwave- and ultrasound-assisted methods, using potassium persulfate as an initiator in aqueous medium. The graft copolymers were characterized by Fourier-transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis. The efficiency of the graft copolymers (CG-g-PAM) in flocculation of a kaolin suspension was studied. Results indicated that the graft copolymers synthesized by ultrasound energy had better flocculation properties than the ones synthesized by the microwave-assisted method. The biodegradability of the graft copolymers was tested by inoculation with the basidiomycete Trametes villosa in liquid medium. The higher formation of biomass than that observed with the commercial flocculant Flonex-9045 indicated that the graft copolymer was accessible to enzymatic attack. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：1550 / 1558

页数：9

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