Synthesis of cassava starch-g-acrylic acid/dimethylaminopropyl methacrylamide: A new hydrogel for brine solution

2021 ◽  
Vol 266 ◽  
pp. 118109
Author(s):  
Zimin Wang ◽  
Haixin Shi ◽  
Feng Wang ◽  
Airong Wang ◽  
Qiang He ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Cassava Starch ◽  
Brine Solution

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.

Synthesis of Double Crosslinked Amphoteric Cassava Starch Resin and Performance of Absorbing Cu (II)

2013 ◽  
Vol 726-731 ◽  
pp. 588-591
Author(s):  
He Ping Li ◽  
Yang Hu ◽  
Hu Qiang Lv ◽  
Yong Zhe Yang ◽  
Yao Zhang
Keyword(s):  
Acrylic Acid ◽  
Infrared Spectrum ◽  
Adsorption Capacity ◽  
Removal Rate ◽  
Cassava Starch ◽  
Sodium Polyphosphate ◽  
Adsorption Time ◽  
Resin Adsorption ◽  
And Performance ◽  
Main Material

Sodium polyphosphate-crosslinked starch was synthesized by using cassava starch and sodium polyphosphate as main material and crosslinked agent individually. On above basis, double crosslinked amphoteric cassava starch resin was synthesized by N,N'-methylene bisacrylamide as inner-crosslinked agent, dimethyl diallyl ammonium chloride (DMDAAC) and acrylic acid as amphoteric grafted monomer. The product was characterized by infrared spectrum (FTIR). The results indicate that the cassava starch was modified successfully, and the final product was double crosslinked amphoteric cassava starch resin. Adsorption behavior of Cu2+ was studied in the condition of different adsorption time, and found that the removal rate and the adsorption capacity of Cu2+ reached up to 98.3% and 196.6 mg/g respectively.

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

Radiation modification of water absorption of cassava starch by acrylic acid/acrylamide

2000 ◽  
Vol 59 (4) ◽  
pp. 413-427 ◽  
Author(s):  
Suda Kiatkamjornwong ◽  
Wararuk Chomsaksakul ◽  
Manit Sonsuk
Keyword(s):  
Acrylic Acid ◽  
Water Absorption ◽  
Cassava Starch ◽  
Radiation Modification

Application of factorial experimental design to optimize radiation‐synthesized and biodegradable super water absorbent based on cassava starch and acrylic acid

2021 ◽  
pp. 51451
Author(s):  
Alvin Kier R. Gallardo ◽  
Lorna S. Relleve ◽  
Bin Jeremiah D. Barba ◽  
Patrick Jay E. Cabalar ◽  
John Andrew A. Luna ◽  
...  
Keyword(s):  
Experimental Design ◽  
Acrylic Acid ◽  
Cassava Starch ◽  
Factorial Experimental Design

scholarly journals RASIO PATI SINGKONG DAN ASAM AKRILAT TERHADAP KAPASITAS ABSORBSI PADA SINTESIS KOMPOSIT POLIMER SUPERABSORBAN

2019 ◽  
Vol 20 (2) ◽  
pp. 111-119
Author(s):  
Weni Fika ◽  
Anwar Kasim ◽  
Novelina Novelina ◽  
Athanasia Amanda Septevani
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Chemical Structure ◽  
Ammonium Persulfate ◽  
Cassava Starch ◽  
Absorption Capacity ◽  
Natural Polymer ◽  
Nacl Solution ◽  
Infra Red ◽  
Maximum Water

This study aimed to synthesize a superabsorbent polymer composite based on a natural polymer that has been made by grafting method using cassava starch as a backbone (main framework), Acrylic acid (AA) as a monomer, Ammonium persulfate (APS) as an initiator and N,N Methylene bisacrylamide (MBA) as a crosslinker. The effect of the ratio of cassava starch and acrylic acid (25 : 75; 50 : 50 and 75 : 25% weight total) has been studied based on absorption capacity. The chemical structure that occurs is analyzed using Fourier Transform Infra-red (FTIR) spectroscopy. The results of the FTIR spectrum showed that the grafting of acrylic acid to starch occurred. In the ratio of starch to acrylic acid 25 : 75% of the weight total obtained the maximum water absorption ability (absorption capacity) 224 g/g in aquades and 25 g/g in 0,9% NaCl solution. Tujuan dari penelitian ini adalah untuk mensintesis komposit polimer superabsorban berbasis polimer alam yang telah dibuat dengan metode grafting (pencangkokan) yang menggunakan pati singkong sebagai backbone (kerangka utama), asam akrilat (AA) sebagai monomer, Ammonium persulfat (APS) sebagai inisiator dan N,N Metilen bisakrilamida (MBA) sebagai crosslinker. Pengaruh rasio pati singkong dan asam akrilat (25 : 75; 50 : 50 dan 75 : 25% berat total) telah dipelajari berdasarkan kapasitas absorbsi. Struktur kimia yang terjadi dianalisa menggunakan spektroskopi Fourier Transform Infra-red (FTIR). Hasil dari spektrum FTIR memperlihatkan bahwa terjadinya grafting asam akrilat terhadap pati. Pada rasio pati dengan asam akrilat 25 : 75% berat total diperoleh kemampuan menyerap air (kapasitas absorbsi) maksimum 224 g/g dalam aquades dan 25 g/g dalam larutan NaCl 0,9%.

Absorption of Hg (II) Form Aqueous Solution onto Double Crosslinked Amphoteric Cassava Starch Resin

2014 ◽  
Vol 886 ◽  
pp. 253-256
Author(s):  
He Ping Li ◽  
Yun Yan Huang ◽  
Jin Wei Yuan ◽  
Guan Wei Yang ◽  
Hu Qiang Lv ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Acrylic Acid ◽  
Removal Rate ◽  
Cassava Starch ◽  
Sodium Polyphosphate ◽  
Adsorption Time ◽  
Scanning Electron ◽  
Main Material

Sodium polyphosphate-crosslinked starch was synthesized by using cassava starch and sodium polyphosphate as main material and crosslinked agent individually. On above basis, double crosslinked amphoteric cassava starch resin was synthesized through three steps of reactions, which included the inner-crosslinked reaction of starch with N,N'-methylene bisacrylamide, the grafted reaction of the obtained copolymer with dimethyl diallyl ammonium chloride (DMDAAC) and the grafted reaction of the obtained copolymer with acrylic acid. The product was characterized by scanning electron microscopy (SEM). The results indicate that the cassava starch was modified successfully. Adsorption behavior of Hg2+ was studied in the condition of different adsorption time, and found that the removal rate and the adsorption capacity of Hg2+ reached up to 95.98% and 191.97 mg/g respectively.

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

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