scholarly journals Rheological behavior of reaction mixtures during the graft copolymerization of cassava starch with acrylic acid

2017 ◽  
Vol 57 (12) ◽  
pp. 1285-1292 ◽  
Author(s):  
J.R. Witono ◽  
I.W. Noordergraaf ◽  
H.J. Heeres ◽  
L.P.B.M. Janssen
Keyword(s):  
Acrylic Acid ◽  
Rheological Behavior ◽  
Graft Copolymerization ◽  
Cassava Starch

Synthesis and characterization of SPE membrane based on sulfonated FEP-g-acrylic acid by radiation induced graft copolymerization for PEM fuel cell

2004 ◽  
Vol 15 (5) ◽  
pp. 270-274 ◽  
Author(s):  
M. Patri ◽  
Varsha R. Hande ◽  
Swati Phadnis ◽  
B. Somaiah ◽  
Suhasini Roychoudhury ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Acrylic Acid ◽  
Graft Copolymerization ◽  
Pem Fuel Cell ◽  
Synthesis And Characterization ◽  
Radiation Induced

Microwave-Irradiated Preparation of Super Absorbent Resin by Graft Copolymerization of Starch and Acrylic Acid

2011 ◽  
Vol 291-294 ◽  
pp. 1335-1338
Author(s):  
Da Biao Zhao
Keyword(s):  
Acrylic Acid ◽  
Microwave Irradiation ◽  
Graft Copolymerization ◽  
Irradiation Time ◽  
Low Cost ◽  
Power Level ◽  
Conventional Heating ◽  
Simple Process ◽  
One Step ◽  
Microwave Power Level

Graft copolymerization of acrylic acid(AA) on starch to prepare super absorbent resin (SAR) under microwave irradiation were investigated using N,N-methylene bis-acrylamide as crosslinker and potassium persulfate as initiator. The influences of the amount of initiator and crosslinker, neutralization degree of acrylic acid(AA), ratio of starch to AA, microwave power level and irradiation time on the distilled water absorption amount of resin were investigated. The results indicated that it only needed 4min under the microwave level of 231W to obtain the resin with the maximum absorption amount of 1110g×g-1, under the conditions that 0.3wt% initiator, 0.02wt% crosslinker, 60% neutralization degree of acrylic acid, the ratio of starch to acrylic acid of 0.25. Under microwave irradiation, the synthesis and drying of super absorbent resin could be completed at one step without nitrogen. Compared to conventional heating method, the methods had the striking advantages of short reaction time, simple process and low cost.

scholarly journals The Effect of Crosslinker and Pore Generated on Selective Adsorbent (Cu2+) based on Grafting of Acrylic Acid onto Cassava Starch

2015 ◽  
Vol 9 (7) ◽  
pp. 37
Author(s):  
Judy R. B. Witono ◽  
Henrietta Henrietta ◽  
Y. I. P Arry Miryanti
Keyword(s):  
Heavy Metal ◽  
Citric Acid ◽  
Acrylic Acid ◽  
Water Absorption ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Cassava Starch ◽  
Metal Adsorption ◽  
Acid Modification ◽  
Release Process

The technology development in many industries nowadays, such as electronic industry produces heavy metal wastes which may pollute our environment. The use of adsorbent as a heavy metal removal from soil and water is one of the efficient process which can be considered to be used. In addition the release of the adsorbate becomes an important way as well because usually those heavy metals still have a high value. The objective of this research is to develop adsorbent based on cassava starch. So, the release process will become easier and will not produce another waste. The adsorbent was produced through the grafting of acrylic acid onto cassava starch by using Fenton initiator. To construct a stable 3-D network, the crosslinker (CL) N,N’- methylenebisacrylamide was added. The variable observed were the amount of CL added (0.5%; 1.5%; 2.5% and 3.5%) and the treatment of generating more pores on starch copolymer. The treatments on starch copolymer observed were single freezing, second freezing, and citric acid modification and carbonization methods. Analysis performed on the adsorbent was % add-on, water absorption and metal adsorption (especially Cu2+ ion) capacity. The result showed that the used of 2.5% CL produced the highest add-on (47.66 %), the highest water absorption capacity and the highest metal adsorption capacity (0.29g Cu2+/g adsorbent) The citric acid modification also produced the highest pores on the adsorbent.

Graft copolymerization of acrylic acid onto xanthum gum using a potassium monopersulfate/Fe2+ redox pair

2003 ◽  
Vol 89 (5) ◽  
pp. 1341-1346 ◽  
Author(s):  
Peeyoosh Kant Pandey ◽  
Jaya Banerjee ◽  
Kavita Taunk ◽  
Kunj Behari
Keyword(s):  
Acrylic Acid ◽  
Graft Copolymerization ◽  
Redox Pair

Preparation and Characterization of Kenaf-Based Superabsorbent Polymers

2011 ◽  
Vol 183-185 ◽  
pp. 1812-1816
Author(s):  
Dan Wang ◽  
Zhan Qian Song ◽  
Shi Bin Shang ◽  
Zhan Jun Wang ◽  
Myoung Ku Lee
Keyword(s):  
Aqueous Solution ◽  
Acrylic Acid ◽  
Graft Copolymerization ◽  
Ph Value ◽  
Crosslinking Agent ◽  
Ammonium Persulfate ◽  
Deionized Water ◽  
Superabsorbent Polymers ◽  
Saline Solutions

Novel kenaf-based superabsorbent polymers (SAPs) were prepared by grafting acrylic acid (AA) and acrylamide (AM) onto kenaf cellulose. Graft copolymerization was carried out in aqueous solution using N, N’-methylenebisacrylamide (NMBA) as crosslinking agent and sodium bisulfite (NaHSO3) and ammonium persulfate ((NH4)2S2O8) as initiator. The SAPs so obtained were examined by SEM. The absorbency of SAPs consists of different kenaf cellulose in deionized water, saline solutions and different pH value solutions were investigated.

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