Electroactive Hydrogels Made with Polyvinyl Alcohol/Cellulose Nanocrystals

Jayaramudu, Tippabattini; Ko, Hyun‐U; Kim, Hyun; Kim, Jung; Muthoka, Ruth M.; Kim, Jaehwan

doi:10.3390/ma11091615

Cited by 65 publications

(39 citation statements)

References 43 publications

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“…Recently, CNC-reinforced, mechanically stiff, and bioactive hybrid hydrogels were developed for bone tissue engineering applications [27]. CNC was incorporated into polyvinyl alcohol (PVA) to develop nontoxic and transparent electroactive hydrogels [28]. Lately, polyacrylamide (PAM)–CNC hydrogels was developed through grafting copolymerization and the shear storage modulus, compression strength, and elastic modulus of the system were studied [29].…”

Section: Introductionmentioning

confidence: 99%

Swelling Behavior of Polyacrylamide–Cellulose Nanocrystal Hydrogels: Swelling Kinetics, Temperature, and pH Effects

et al. 2019

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This paper reports swelling behavior of cellulose nanocrystal (CNC)-based polyacrylamide hydrogels prepared by a radical polymerization. The CNC acts as a nanofiller through the formation of complexation and intermolecular interaction. FTIR spectroscopy and XRD studies confirmed the formation of intermolecular bonds between the acrylamide and hydroxyl groups of CNC. The swelling ratio and water retention were studied in de-ionized (DI) water at room temperature, and the temperature effect on the swelling ratio was investigated. Further, the pH effect on the swelling ratio was studied with different temperature levels. Increasing the pH with temperature, the prepared hydrogel shows 6 times higher swelling ratio than the initial condition. The swelling kinetics of the developed hydrogels explains that the diffusion mechanism is Fickian diffusion mechanism. Since the developed hydrogels have good swelling behaviors with respect to pH and temperature, they can be used as smart materials in the field of controlled drug delivery applications.

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Section: Introductionmentioning

confidence: 99%

Swelling Behavior of Polyacrylamide–Cellulose Nanocrystal Hydrogels: Swelling Kinetics, Temperature, and pH Effects

et al. 2019

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“…The schematic proposed structure of PVA/CNC bead is presented in Fig.2. The interacting hydroxyl groups on the surfaces of both CNC and PVA yield hydrogen bonds (Jayaramudu et al 2018). Additionally, the higher quantity of CNC dispersed in the formed hydrogel, the higher is CNC aggregation as a result of the hydrophilic property of CNC, causing the uniformly rough surface of the resultant composite (Jayaramudu et al 2018).…”

Section: Resultsmentioning

confidence: 99%

Preparation of a Magnetic Composite Based on Cellulose Nanocrystals and Polyvinyl Alcohol and its Efficient Use for Removal of Nickel and Zinc Ions from Aqueous Solutions

Dawood

Taher

2018

Journal of Agricultural Chemistry and Biotechnology

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Heavy metals are harmful ions and their removal from wastewater has attracted a growing attention amongst the scientific researchers in current decade. In this study, pea peels were used as precursor to purify cellulose nanocrystals (CNCs). Polyvinyl alcohol/ CNCs magnetic composite was developed as a novel bioadsorbent for adsorption of Ni (II) and Zn (II) ions from aqueous solutions. Results revealed that the adsorption efficiency of the examined ions by PVA/CNCs magnetic composite largely increased with increasing contact time. The equilibrium adsorption capacity was 4.19 and 4.00 mg g-1 for Ni (II) and Zn (II), respectively. The highest removal percentages for Ni (II) and Zn (II) were 83.86 and 80.13, respectively at initial concentration of 10 µg/ml. The FTIR and SEM EDX analysis were performed before and after Ni (II) and Zn (II) sorption on the PVA/cellulose beads, validating that the-OH groups played a chief role in sorption process. Finally, it could be concluded that PVA/cellulose magnetic composite is a promising adsorbent for removing Ni (II) and Zn (II) ions from wastewater.

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“…However, loading ability of CNFs is lower than that of CNCs as a result of the tendency for entanglement. Different methods, such as homogenization, 58 free radical polymerization, 59 solution casting, 60 freezing/thawing cycle, 61 three-dimensional (3D) printing, 62 and ultraviolet (UV)/ion-mediated cross-linking, 63 have been extensively studied to incorporate CNCs and CNFs into polymeric hydrogel networks.…”

Section: Use Of Cellulose-based Hydrogels For Probiotic Productionmentioning

confidence: 99%

Perspective on Constructing Cellulose-Hydrogel-Based Gut-Like Bioreactors for Growth and Delivery of Multiple-Strain Probiotic Bacteria

Mettu

Hathi

Athukoralalage

et al. 2021

J. Agric. Food Chem.

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The current perspective presents an outlook on developing gut-like bioreactors with immobilized probiotic bacteria using cellulose hydrogels. The innovative concept of using hydrogels to simulate the human gut environment by generating and maintaining pH and oxygen gradients in the gut-like bioreactors is discussed. Fundamentally, this approach presents novel methods of production as well as delivery of multiple strains of probiotics using bioreactors. The relevant existing synthesis methods of cellulose hydrogels are discussed for producing porous hydrogels. Harvesting methods of multiple strains are discussed in the context of encapsulation of probiotic bacteria immobilized on cellulose hydrogels. Furthermore, we also discuss recent advances in using cellulose hydrogels for encapsulation of probiotic bacteria. This perspective also highlights the mechanism of probiotic protection by cellulose hydrogels. Such novel gut-like hydrogel bioreactors will have the potential to simulate the human gut ecosystem in the laboratory and stimulate new research on gut microbiota.

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Electroactive Hydrogels Made with Polyvinyl Alcohol/Cellulose Nanocrystals

Cited by 65 publications

References 43 publications

Swelling Behavior of Polyacrylamide–Cellulose Nanocrystal Hydrogels: Swelling Kinetics, Temperature, and pH Effects

Swelling Behavior of Polyacrylamide–Cellulose Nanocrystal Hydrogels: Swelling Kinetics, Temperature, and pH Effects

Preparation of a Magnetic Composite Based on Cellulose Nanocrystals and Polyvinyl Alcohol and its Efficient Use for Removal of Nickel and Zinc Ions from Aqueous Solutions

Perspective on Constructing Cellulose-Hydrogel-Based Gut-Like Bioreactors for Growth and Delivery of Multiple-Strain Probiotic Bacteria

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