Attapulgite/Poly(acrylic acid) Nanocomposite (ATP/PAA) Hydrogels with Multifunctionalized Attapulgite (org-ATP) Nanorods as Unique Cross-linker: Preparation Optimization and Selective Adsorption of Pb(II) Ion

2013 ◽  
Vol 2 (4) ◽  
pp. 643-651 ◽  
Author(s):  
Peng Liu ◽  
Liping Jiang ◽  
Longxiang Zhu ◽  
Aiqin Wang
Keyword(s):  
Acrylic Acid ◽  
Selective Adsorption ◽  
Cross Linker ◽  
Poly Acrylic Acid

A new approach for the immobilization of poly(acrylic) acid as a chemically reactive cross-linker on the surface of poly(lactic) acid-based biomaterials

2017 ◽  
Vol 71 ◽  
pp. 862-869 ◽  
Author(s):  
Ksenia S. Stankevich ◽  
Nadezhda V. Danilenko ◽  
Ruslan M. Gadirov ◽  
Semen I. Goreninskii ◽  
Sergei I. Tverdokhlebov ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Acrylic Acid ◽  
Poly Lactic Acid ◽  
New Approach ◽  
Cross Linker ◽  
Poly Acrylic Acid

Synthesis and properties of sodium alginate/poly(acrylic acid) double-network superabsorbent

e-Polymers ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 271-278 ◽  
Author(s):  
Jie Wu ◽  
Yanmei Zhou ◽  
Yang Meng ◽  
Jiaxing Zhang ◽  
Qingbing Liu ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Metal Ion ◽  
Step Method ◽  
Experimental Conditions ◽  
Double Network ◽  
Metal Ion Removal ◽  
Removal Capacity ◽  
Cross Linker ◽  
Poly Acrylic Acid

AbstractA tough double-network (DN) superabsorbent was synthesized by a two-step method using N,N-methylenebisacrylamide as a covalent cross-linker for one monomer [acrylic acid (AA)], Ca2+ (CaCl2) as an ionic cross-linker for the other monomer (sodium alginate [SA]) and ammonium peroxodisulfate as the redox initiator. The optimized experimental conditions for the absorbency in deionized water were determined according to orthogonal experiments. Unlike conventional chemical cross-linked single-network superabsorbents, SA/poly(acrylic acid) (PAA) DN superabsorbents exhibit superb mechanical properties. Compared with the tensile strength of PAA-only superabsorbents, that of SA/PAA DN superabsorbents showed an approximately 371.9% increase with increasing amount of 6 wt.% SA. We also investigated the capacity of SA/PAA DN superabsorbents to remove heavy metal ions. It was found that the addition of SA can truly increase the metal ion removal capacity of the PAA superabsorbents and that the affinity order was Pb2+>Zn2+.

Selective Adsorption and Separation of Organic Dyes by Poly(acrylic acid) Hydrogels Formed with Spherical Polymer Brushes and Chitosan

2018 ◽  
Vol 71 (11) ◽  
pp. 846 ◽  
Author(s):  
Rui Zhang ◽  
Hongwei Peng ◽  
Tianxu Zhou ◽  
Min Li ◽  
Xuhong Guo ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Polymer Brushes ◽  
Electrostatic Interactions ◽  
Separation Efficiency ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Order Kinetic ◽  
Double Network ◽  
Poly Acrylic Acid

Direct discharge of industry organic dyes has caused serious environmental pollution. In this study, a series of double network poly(acrylic acid) (PAA) hydrogels were fabricated with spherical polymer brushes (SPBs) and chitosan (CS) as crosslinker. Neutral spherical polyelectrolyte brushes of polystyrene–poly-N-isopropylacrylamide (PNIPAM@PS) in which poly(N-isopropylacrylamide) (PNIPAM) arms were grafted on polystyrene (PS) nanospheres, were employed as macro-crosslinkers. The innumerable hydrogen bonds both between the highly entangled PAA chains and between PNIPAM and the PAA chains composed the first network of the hydrogels. The electrostatic interactions between CS and the PAA chains formed the second network of the hydrogels. These double network hydrogels, named PNIPAM@PS/CS/PAA, achieve good compressive performance and a low swell ratio because of their compact structure through plentiful hydrogen bonding and electrostatic interactions. The hydrogel could absorb cationic dyes from water with high separation efficiency and selectivity due to the electrostatic interaction between the carboxy groups and dye molecules. The adsorption process fitted a pseudo-second-order kinetic model and Langmuir isotherm model very well. Moreover, the hydrogel can separate cationic dyes from mixed dye solutions through electrostatic interactions. After being loaded with silver nanoparticles, the obtained silver@hydrogel exhibited a good capacity for the photocatalytic degradation towards different dyes. The hydrogels are promising for dye-containing wastewater treatment.

scholarly journals Mechanically tough and highly stretchable poly(acrylic acid) hydrogel cross-linked by 2D graphene oxide

RSC Advances ◽  
2020 ◽  
Vol 10 (18) ◽  
pp. 10949-10958 ◽  
Author(s):  
Stephen Don Sarkar ◽  
Md. Mosfeq Uddin ◽  
Chanchal Kumar Roy ◽  
Md. Jahangir Hossen ◽  
Majharul Islam Sujan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Acrylic Acid ◽  
Highly Stretchable ◽  
Cross Linker ◽  
Poly Acrylic Acid

Incorporation of a novel GO based cross-linker into the conventional poly(acrylic acid) hydrogel remarkably enhances the toughness and stretchability.

Preparation and Water-Absorbing Capacity of Poly(Acrylic Acid)/Montmorillonite Composites

2013 ◽  
Vol 404 ◽  
pp. 393-397
Author(s):  
Kui Chen ◽  
Tian Yun Zhang ◽  
Xiao Ping Zheng
Keyword(s):  
High Temperature ◽  
Acrylic Acid ◽  
Polymerization Reaction ◽  
Microporous Structure ◽  
Reaction Condition ◽  
Nanophase Materials ◽  
Cross Linker ◽  
The Relationship ◽  
Superabsorbent Composites ◽  
Poly Acrylic Acid

Poly (acrylic acid)/montmorillonite (PAA/MMT) superabsorbent composites was synthesized by high temperature rapid-induced solvent polymerization reaction. The structure of this composites was investigated by XRD. The relationship between reaction condition and water-absorbing capacity of this composites was researched. The result shows that, when montmorillonite content is less than 5 wt%, PAA/MMT composites is nanophase materials. With the increase of cross linker, neutralization degree of acrylic acid, or montmorillonite content, water-absorbing capacity of prepared composites first rises then decreases. When cross linker content is 0.225 wt%, neutralization degree is 70%, and montmorillonite content is 5 wt%, PAA/MMT composites possess microporous structure and its water-absorbing capacity is 511 times of the solid weight itself.

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