Graft Copolymerization Onto Starch. 3: Grafting of Acrylamide Using Ceric Ion Initiation and Preparation of Its Hydrogels

Athawale, V. D.; Vidyagauri, V. Lele

doi:10.1002/(sici)1521-379x(199810)50:10<426::aid-star426>3.3.co;2-r

Cited by 8 publications

(8 citation statements)

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“…Thus, most of the monomer is preferentially used up in the formation of homopolymer on increasing the AA concentration, which is evident from the rise in viscosity of the reaction medium at higher concentration. 7,13,29,35…”

Section: Effect Of Monomer Concentrationmentioning

confidence: 99%

Graft copolymerization of acrylamide onto tamarind kernel powder in the presence of ceric ion

Goyal¹,

Kumar²,

Sharma³

2008

J of Applied Polymer Sci

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Tamarind kernel powder (TKP), a natural xyloglucan polysaccharide is derived from the seeds of Tamarindus indica Linn., a common and most important tree of India and South East Asia. TKP is used in cotton sizing, as a wet-end additive in the paper industry, as a thickening, stabilizing, and gelling agent in the food industry. Chemical modification of TKP through grafting has received considerable attention to impart new functional groups for different applications. Keeping this in view, graft copolymerization of acrylamide (AA) onto TKP was carried out in an aqueous medium using a ceric ammonium nitrate (CAN)-nitric acid initiation system. The reaction conditions were optimized for grafting with respect to the effect of the concentrations of CAN, nitric acid, TKP, AA, time, and reaction temperature. The maximum percentage grafting (%G) and percentage grafting efficiency (%GE) were found to be 231.45 and 93.66%, respectively.

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Section: Effect Of Monomer Concentrationmentioning

confidence: 99%

Graft copolymerization of acrylamide onto tamarind kernel powder in the presence of ceric ion

Goyal¹,

Kumar²,

Sharma³

2008

J of Applied Polymer Sci

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“…Because of their exceptional properties, i.e. biocompatibility, biodegradability, renewability, and non-toxicity, polysaccharides are the main part of the natural-based superabsorbent hydrogels [21][22][23][24]. The higher production cost and low gel strength of these superabsorbents, however, restrict their application widely.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Carrageenan-g-Poly(Acrylic Acid)/Bentonite Superabsorbent Composite

Hosseinzadeh¹,

Sadeghzadeh²,

Babazadeh³

2011

JBNB

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A novel biopolymer-based superabsorbent hydrogel composite based on kappa-carrageenan (κC) have been prepared via graft copolymerization of acrylic acid (AA) in the presence of bentonite powder using methylenebisacrylamide (MBA) as a crosslinking agent and ammonium persulfate (APS) as an initiator. The hydrogel structure was confirmed using FTIR spectroscopy and the morphology of the samples was examined by scanning electron microscopy (SEM). The affecting variables onto graft polymerization (i.e. AA, MBA and APS concentration, as well as the bentonite amount) were systematically optimized to achieve a hydrogel with swelling capacity as high as possible. The results of Brunauer–Emmett–Teller (BET) analysis showed that the average pore diameter of the synthesized hydrogel was 11.5 nm. The effect of various salt media and solutions with different pHs on the swelling of the superabsorbent was also studied

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“…Our results were in agreement with those of most earlier reports. 15,19,25,28 Viscometry According to the RVA viscosity data, the grafted starches showed significantly higher peaks and final viscosities than those of the NS (Table IV). The peak and final viscosities were 2238 and 1517 cP, respectively, for the NS, whereas, sample A4 exhibited the highest peak and final viscosities of 6466 and 7094 cP, respectively.…”

Section: Xrd Studiesmentioning

confidence: 99%

Cassava starch‐graft‐polymethacrylamide copolymers as flocculants and textile sizing agents

Nair

Jyothi

2013

J of Applied Polymer Sci

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Cassava starch‐graft‐polymethacrylamide (PMAM) copolymers were synthesized by a free‐radical‐initiated polymerization reaction, and the products were tested for their efficiency as flocculants and textile sizing agents. The highest percentages of grafting and monomer conversion were 79.9 and 78.0%, respectively. The grafted starches were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction analysis, scanning electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. The average molecular weight of PMAM chains in the grafted starches ranged from 15.9 to 30.8 × 105 g/mol. The grafted starches exhibited a higher peak viscosity and paste stability in comparison to the native starch (NS). Dynamic mechanical analysis showed that grafting provided fairly shear‐stable hydrogels, and the highest storage modulus obtained was 17,900 Pa compared to 1879 Pa for NS. The flocculation studies demonstrated the superiority of starch‐g‐PMAM over cassava starch and PMAM as an efficient flocculant. The tensile strength of cotton yarns sized with the starch‐grafted copolymer was significantly higher (104 MPa) compared to that sized with NS (34 MPa). © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39810.

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Graft Copolymerization Onto Starch. 3: Grafting of Acrylamide Using Ceric Ion Initiation and Preparation of Its Hydrogels

Cited by 8 publications

References 0 publications

Graft copolymerization of acrylamide onto tamarind kernel powder in the presence of ceric ion

Graft copolymerization of acrylamide onto tamarind kernel powder in the presence of ceric ion

Preparation and Properties of Carrageenan-g-Poly(Acrylic Acid)/Bentonite Superabsorbent Composite

Cassava starch‐graft‐polymethacrylamide copolymers as flocculants and textile sizing agents

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