Sodium alginate grafted poly(N-vinyl formamide-co-acrylic acid)-bentonite clay hybrid hydrogel for sorptive removal of methylene green from wastewater

2021 ◽  
Vol 611 ◽  
pp. 125853
Author(s):  
Hanif Subhan ◽  
Sultan Alam ◽  
Luqman Ali Shah ◽  
Muhammad Waqas Ali ◽  
Muhammad Farooq
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Bentonite Clay ◽  
Hybrid Hydrogel ◽  
Methylene Green ◽  
Sorptive Removal

scholarly journals Superabsorbent poly(acrylic acid) and antioxidant poly(ester amide) hybrid hydrogel for enhanced wound healing

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Jianhua Zhang ◽  
Junfei Hu ◽  
Baoshu Chen ◽  
Tianbao Zhao ◽  
Zhipeng Gu
Keyword(s):  
Wound Healing ◽  
Acrylic Acid ◽  
Protein Denaturation ◽  
Healing Process ◽  
Antioxidant Properties ◽  
Skin Damage ◽  
Hybrid Hydrogel ◽  
Hydrogel Scaffolds ◽  
Hybrid Hydrogels ◽  
Poly Acrylic Acid

Abstract Wound healing dressing is increasingly needed in clinical owing to the large quantity of skin damage annually. Excessive reactive oxygen species (ROS) produced through internal or external environmental influences can lead to lipid peroxidation, protein denaturation, and even DNA damage, and ultimately have harmful effects on cells. Aiming to sufficiently contact with the wound microenvironment and scavenge ROS, superabsorbent poly (acrylic acid) and antioxidant poly (ester amide) (PAA/PEA) hybrid hydrogel has been developed to enhance wound healing. The physical and chemical properties of hybrid hydrogels were studied by Fourier-transform infrared (FTIR) absorption spectrum, compression, swelling, degradation, etc. Besides, the antioxidant properties of hybrid hydrogels can be investigated through the free radical scavenging experiment, and corresponding antioxidant indicators have been tested at the cellular level. Hybrid hydrogel scaffolds supported the proliferation of human umbilical vein endothelial cells and fibroblasts, as well as accelerated angiogenesis and skin regeneration in wounds. The healing properties of wounds in vivo were further assessed on mouse skin wounds. Results showed that PAA/PEA hybrid hydrogel scaffolds significantly accelerated the wound healing process through enhancing granulation formation and re-epithelialization. In summary, these superabsorbent and antioxidative hybrid hydrogels could be served as an excellent wound dressing for full-thickness wound healing.

A multifunctional poly(acrylic acid)/gelatin hydrogel

2009 ◽  
Vol 24 (5) ◽  
pp. 1653-1661 ◽  
Author(s):  
Qunwei Tang ◽  
Jihuai Wu ◽  
Jianming Lin ◽  
Shijun Fan ◽  
De Hu
Keyword(s):  
Acrylic Acid ◽  
Transport Model ◽  
Interpenetrating Network ◽  
Hybrid Hydrogel ◽  
Elongation At Break ◽  
Gelatin Hydrogel ◽  
Preparation Conditions ◽  
Aqueous Solution Polymerization ◽  
Poly Acrylic Acid

A poly(acrylic acid)/gelatin interpenetrating network hydrogel was synthesized by aqueous solution polymerization. The influences of preparation conditions including cross-linker, initiator, gelatin content, and neutralization degree on the swelling ratios of the hydrogels are investigated. The swelling, mechanical strength, biodegradability, and drug-release properties of poly(acrylic acid)/gelatin hydrogel are evaluated. The hydrogel has excellent mechanical properties; tensile strength is 1500 kPa, and elongation at break is 887%, respectively. The in vitro biodegradation shows that an interpenetrating network structure exists in the poly(acrylic acid)/gelatin hybrid hydrogel. A release study indicates that the theophylline release from the hydrogel depends on the cross-linking density of the hydrogel and pH of the medium, and the drug diffusion obeys an anomalous transport model.

Enzymatic synthesis of sodium alginate‐g‐poly (acrylic acid) grafting copolymers as a novel printing thickener

2021 ◽  
Author(s):  
Nan Zhang ◽  
Zhensheng Tian ◽  
Yuanyuan Yu ◽  
Ping Wang ◽  
Man Zhou ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Enzymatic Synthesis ◽  
Poly Acrylic Acid

Synthesis and the Swelling Behavior of Sodium Alginate Graft Poly (Acrylic Acid-co-acrylamide)/Graphite Oxide Super Absorbent Composite

2019 ◽  
Vol 61 (5) ◽  
pp. 680-690 ◽  
Author(s):  
Linhui Zhu ◽  
Yu Liu ◽  
Bin Zhou ◽  
Hongduo Tang ◽  
Fangyuan Wang ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Graphite Oxide ◽  
Swelling Behavior ◽  
Poly Acrylic Acid

Adsorption of Dyes onto Sodium Alginate Graft Poly(Acrylic Acid-co-2-Acrylamide-2-Methyl Propane Sulfonic Acid)/ Kaolin Hydrogel Composite

2017 ◽  
Vol 25 (8) ◽  
pp. 627-634 ◽  
Author(s):  
Linhui Zhu ◽  
Chengdong Guan ◽  
Bin Zhou ◽  
Zhentao Zhang ◽  
Rui Yang ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Sodium Alginate ◽  
Xylenol Orange ◽  
Methyl Violet ◽  
Cationic Dyes ◽  
Anionic Dyes ◽  
Hydrogel Composite ◽  
Adsorption Capacities ◽  
Initial Ph ◽  
Poly Acrylic Acid

Adsorption of four dyes, namely methyl violet (MV), rhodamine 6G (R6G), acid chrome blue K (AK) and xylenol orange (XO) onto sodium alginate graft poly(acrylic acid-co-2-acrylamide-2-methyl-1-propanesulfonicacid)/kaolin (SA-g-P(AA-co-AMPS)/KL) hydrogel composite is studied. The factors influencing the adsorption capacities, including the initial concentrations of dye solutions, contact time, initial pH values and dosage of the adsorbent as well as ionic strength of the solution are discussed. It is more effective for the composite to adsorb cationic dyes such as MV and R6G rather than anionic dyes AK and XO. The maximum adsorption capacities of MV, R6G, AK and XO are 1361.1, 1627.8, 563.5 and 312.4 mg/g, respectively. The adsorption thermodynamics for the four dyes are in accordance with both the Freudlich and Redlich-Peterson equations. It is shown that adsorption of the cationic dyes R6G and MV is spontaneous, while that of anionic dyes AK and XO is not. The kinetics studies show that the adsorption of the four dyes fitted a pseudo-second-order equation.

Radiation Synthesis of Superabsorbent Poly(acrylamide-co-acrylic acid)-Sodium Alginate Hydrogels

2013 ◽  
Vol 746 ◽  
pp. 88-96 ◽  
Author(s):  
Erizal ◽  
Sudirman ◽  
Emil Budianto ◽  
A. Mahendra ◽  
Rike Yudianti
Keyword(s):  
Electron Microscopy ◽  
Acrylic Acid ◽  
Sodium Alginate ◽  
Irradiation Dose ◽  
Natural Polymer ◽  
Equilibrium Degree ◽  
Infra Red ◽  
Sem Micrograph ◽  
Scanning Electron ◽  
Poly Acrylamide

Sodium alginate (NaAlg) is considered to be a potential natural polymer for biomaterial applications, because of its hydrophilic properties that is capable to increase the swelling of hydrogels and biodegradable. This study describes the synthesis of a poly (acrylamide-co-acrylic acid) NaAlg superabsorbent hydrogels via crosslinking gamma radiation. The effect of irradiation dose (20-40 kGy) and NaAlg concentration (0.1-0.7 %) of on swelling of hydrogels were studied. The copolymers were characterized by Fourier transform infra red spectroscopy (FTIR) and scanning electron microscopy (SEM) micrograph. The presence of the lowest (0.1%) NaAlg concentration provokes a significant increasing the equilibrium degree solution (EDS) of hydrogel up 800 g/g ,and the extent of gel fraction increases as a function irradiation dose up to about 99 %. The hydrogels were also found to be sensitive to the ionic strength of medium. The FTIR spectra of hydrogels were shown crosslinking occurs between acrylamide and acrylic acid and pores structures in the hydrogel observed by using SEM.

Sign in / Sign up

Export Citation Format

Share Document