Controlled mechanical and swelling properties of urethane acrylate grafted calcium alginate hydrogels

Wang, Jichao; Ying, Xiaoguang; Liu, Jiangquan; Li, Xiao; Zhang, Weiying

doi:10.1016/j.ijbiomac.2015.07.021

Cited by 16 publications

(4 citation statements)

References 19 publications

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“…PPy had a characteristic peak of amorphous nature at 2θ = 26.16°, which was ascribed to the scattering from PPy chains at the interplanar spacing. , A broad diffraction peak centered at 2θ = 22.96° was observed for PHEA- g -PPy due to the overlap of the peaks of PHEA and the grafted PPy. The reduction in the peak intensity indicated that the grafted PPy chains penetrated the interior of PHEA, decreasing the number of crystalline knots. , …”

Section: Resultsmentioning

confidence: 99%

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Polyacrylate-graft-polypyrrole Copolymer as Intrinsically Elastic Electrodes for Stretchable Supercapacitors

Yang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Constructing elastic electrodes with high mechanical and electrochemical stability remains a challenge in developing flexible supercapacitors. Instability of elastic composite electrodes stems from detachment of noncovalently associated electroactive components from elastic substrates under cyclic deformations. Herein, a novel all-organic copolymer consisting of polypyrrole grafted from a polyacrylate elastomer is proposed as elastic electrodes for stretchable supercapacitors. The single copolymer is obtained by graft polymerization in the swollen state, characterized by a wrinkled polypyrrole coating covalently attached on an elastic core. The copolymer is intrinsically elastic and maintains structural integrity under bending, twisting, and stretching deformations to ensure stable electrochemical performance. In addition, the grafted polypyrrole aggregates densely under the constraint of the backbone and gives a competitive conductivity of 41.6 S cm–1. A stretchable supercapacitor is constructed using the copolymer as electrodes and an acid hydrogel as an electrolyte, resulting in a specific capacitance of 430 mF cm–2. The supercapacitor delivers a capacitance retention of 100% after 1000 stretching–releasing cycles, exhibiting mechanical and electrochemical reliability under elastic deformations.

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Section: Resultsmentioning

confidence: 99%

“…The reduction in the peak intensity indicated that the grafted PPy chains penetrated the interior of PHEA, decreasing the number of crystalline knots. 30,31 Elastic Deformation of PHEA-g-PPy. Uniaxial tensile measurements were performed for PHEA and PHEA-g-PPy at room temperature to evaluate the stretchability.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Polyacrylate-graft-polypyrrole Copolymer as Intrinsically Elastic Electrodes for Stretchable Supercapacitors

Yang

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Recently, intense research is going on to search for new conventional and low-cost green adsorbent for waste water treatment. Moreover, to further increase mechanical strength and sorption capacity of the conventional adsorbent, the lignocellulosic part was modified by various organic and inorganic compounds, acid and bases and also blended with several synthetic polymers reported elsewhere (Wang et al 2015), biopolymer (Zhang et al 2013), metal oxide nanoparticles (Gopalakannan and Viswanathan 2015), nano-clay materials (Hassani et al 2015) and poly (methyl metha acrylate)-grafted alginate @Cys-bentonite copolymer hybrid nanocomposite (Hasan and Ahmad 2019). Moreover, phosphate-treated sawdust (lignocellulosic material) shows a remarkable increase in sorption capacity of Cr(VI) as compared to untreated sawdust (Ajmal et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Polyacrylamide-Grafted Actinidia deliciosa peels powder (PGADP) for the sequestration of crystal violet dye: isotherms, kinetics and thermodynamic studies

Ahmad¹,

Ansari²

2020

Appl Water Sci

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Herein, a novel and eco-friendly low-cost adsorbent polyacrylamide-grafted Actinidia deliciosa (Kiwi fruit) peels powder (PGADP) was synthesized and utilized as a potential adsorbent for the sequestration of crystal violet (CV) dye from aqueous solution. The material was characterized by various analytical techniques such as Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), X-ray diffractometer (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The adsorption process was carried out in a batch process with different concentrations, adsorbent doses, pH, contact time and temperatures. The maximum adsorption of CV dye from aqueous solution was observed at pH 7.3, contact time 180 min and initial dye concentration 20 mgL −1 . The equilibrium data were tested by applying various isotherms models such as Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R), and the results showed that Langmuir was found to be the best fitted model based on the highest correlation coefficient (R 2 ). Kinetic data showed that pseudo-second order model was best obeyed over wide range of concentrations. In thermodynamic study, positive value of ∆H o and negative value of ΔG° confirm endothermic and spontaneous nature of adsorption process with increased randomness at solid-solution interface. Desorption of CV dye was performed successfully using 1 M acetic acid with excellent regenerating capacity that lasts up to fourth cycle. Therefore, PGADP can be used effectively and economically for removal of CV dye from aqueous solution and industrial waste water.

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“…It has been widely recognized that the development of biomaterials and the preparation of artificial implants could be well applied for repairing various injured tissues in the last several decades . As of now, a variety of biomaterials made from natural materials or synthetic materials have been used for peripheral nerve regeneration, including chitosan, silk fibroin, sodium alginate (SA), gelatin (Gel), polypropylene alcohol, polyacrylamide (PAM), hyaluronic acid, and so forth. The above‐mentioned biomaterials have a considerable prospect for repairing PNI, but the effect is still not as good as that of autologous graft, therefore, it is necessary to further develop suitable artificial implants for promoting nerve regeneration.…”

Section: Introductionmentioning

confidence: 99%

Construction of polyacrylamide/graphene oxide/gelatin/sodium alginate composite hydrogel with bioactivity for promoting Schwann cells growth

Zhao

Wang

Niu

et al. 2018

J Biomedical Materials Res

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Various hydrogels made from natural or synthetic polymers have been widely used in biologic tissues, drug delivery, and artificial implants due to their good biocompatibility, indicating a promising perspective in regenerative medicine. In the present study, a composite hydrogel named polyacrylamide/graphene oxide/gelatin/sodium alginate (PAM/GO/Gel/SA) for accelerating peripheral nerve regeneration was fabricated through in situ free radical polymerization for the first time. A series of physicochemical properties including morphology, porosity, swelling behaviors, component, mechanical properties, and in vitro degradation behavior of the prepared composite hydrogel were characterized. The effects of the composite hydrogel on Schwann cells growth were evaluated and the related molecular mechanism was further penetrated. The results showed that the prepared PAM/GO/Gel/SA composite hydrogels displayed different color appearance as the function of component variations. The surface morphology, components, swelling ratio, mechanical properties, and porosity were all changed with the concentration alteration of each ingredient, while no obvious degradation behavior was observed, indicating a controllable physicochemical property. The culture of cells exhibited that the composite hydrogels could well support the attachment and proliferation of Schwann cells. The gene expression levels of Sox10, GAP43, and myelin basic protein (MBP) in PGG SYR1 and PGG SYR0.5 were higher than those of NC. This study may provide important theoretical and experimental basis for the design and development of hydrogel scaffolds for nerve tissue engineering application. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1951-1964, 2018.

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Controlled mechanical and swelling properties of urethane acrylate grafted calcium alginate hydrogels

Cited by 16 publications

References 19 publications

Polyacrylate-graft-polypyrrole Copolymer as Intrinsically Elastic Electrodes for Stretchable Supercapacitors

Polyacrylate-graft-polypyrrole Copolymer as Intrinsically Elastic Electrodes for Stretchable Supercapacitors

Polyacrylamide-Grafted Actinidia deliciosa peels powder (PGADP) for the sequestration of crystal violet dye: isotherms, kinetics and thermodynamic studies

Construction of polyacrylamide/graphene oxide/gelatin/sodium alginate composite hydrogel with bioactivity for promoting Schwann cells growth

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