Cellulose nanofibers reinforced sodium alginate-polyvinyl alcohol hydrogels: Core-shell structure formation and property characterization

Yue, Yiying; Han, Jingquan; Han, Guangping; French, Alfred D.; Qi, Yadong; Wu, Qinglin

doi:10.1016/j.carbpol.2016.04.005

Cited by 137 publications

(66 citation statements)

References 47 publications

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“…Yue et al 36 reported significant improve on compression stress for sodium alginate-polyvinyl alcohol hydrogels reinforced with cellulose nanofibers (CNF). The enhancement in mechanical compression property was attributed to well dispersed CNF into the hydrogel structure.…”

Section: Uniaxial Compression Testmentioning

confidence: 99%

Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

et al. 2019

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In this study, chitosan hydrogels were produced with 0, 2, 4 and 6 wt% of cellulose nanocrystals (CNC) using hexahydrate zinc nitrate (Zn(NO 3) 2 .6H 2 O) as a catalyst for chitosan crosslinking reaction. CNC´s size was estimated by dynamic light scattering (DLS) and surface charge by zeta potential. Hydrogels were characterized by rotational rheometer, swelling test, uniaxial compression test, in vitro degradation, scanning electron microscopy (SEM) and microtomography. Results showed that zinc nitrate and CNC addition did not influence mechanical properties, degradation, and morphology of the hydrogels. However, zinc nitrate decreased 36.54% of the gel time and 41.37% of the swelling degree, and increased the crosslinking degree of the chitosan hydrogels, proving not only its catalytic effect but also its participation in the crosslinking reaction. Porosity was slightly reduced after addition of zinc nitrate and incorporation of CNC. In the mechanism of crosslinking reaction, a competition between CNC and zinc nitrate was observed.

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Section: Uniaxial Compression Testmentioning

confidence: 99%

Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

et al. 2019

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“…Though the materials are biocompatible, the compatibility of the medical devices, in some instances, depends on the processing steps followed and the solvents utilized during the fabrication, which may lead to severe consequences of incompatibility. In this context, previous reports indicated that the presence of glutaraldehyde showed certain signs of cytotoxicity [32]. Thus, it is a prerequisite to measure the biocompatibility attribute in that application area.…”

Section: Resultsmentioning

confidence: 99%

Effect of Icariin on Engineered 3D-Printed Porous Scaffolds for Cartilage Repair

Kankala

Liu

et al. 2018

Materials

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In recent times, cartilage defects have been the most common athletic injuries, often leading to dreadful consequences such as osteoarthritis, pain, joint deformities, and other symptoms. It is also evident that damage to articular cartilage is often difficult to recover or self-heal because of poor vascular, nervous, and lymphatic supplies. Moreover, cartilage cells have poor regeneration ability and high maturity. Inspired by these facts and the rapid advances in the field of tissue engineering (TE), we fabricated highly porous three-dimensional (3D) scaffold architectures based on cell-responsive polymeric inks, i.e., sodium alginate and gelatin (SA-Gel, 1:3 ratio), by a novel 3D printing method. Moreover, the effect of various processing parameters was systematically investigated. The printed scaffolds of polymer composites gels with excellent transparency, moderate viscosity, and excellent fluid properties showed good surface morphology, better thermal stability and swelling effect, and unique interconnected porous architectures at the optimized operating parameters. In vitro cell proliferation experiments of these cytocompatible scaffolds showed the excellent adhesion rate and growth behavior of chondrocytes. In addition, the porous architectures facilitated the efficient distribution of cells with only a few remaining on the surface, which was confirmed by confocal laser scanning microscopic (CLSM) observations. Icariin (ICA) addition at a concentration of 10 μg/mL further significantly enhanced the proliferation of chondrocytes. We envision that these cell-responsive polymeric inks in the presence of growth regulators like ICA may have potential in engineering complex tissue constructs toward diverse applications in TE.

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“…To better understand the formation mechanism of BMMCs, the FTIR spectra of BMMCs were studied after the incorporation of primary and secondary cross-linking agents ( interpenetrating polymer network (IPN) structure was developed (Hoon et al, 2003;Yue et al, 2016;Messaoud et al, 2016). First, semi-interpenetrating polymer network (SIPN) configuration was formed due to the crosslinking of G units (in SA chains) with Ca 2+ via chelation, covalent and hydrogen bonding in the manifestation of PVA-PMNPs (Jao et al, 2009).…”

Section: Ftir Powder Xrd Tga and Edx Analysesmentioning

confidence: 99%

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

Ali

Peng

Lin

et al. 2019

Journal of Environmental Management

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Current research is based on an innovative approach of the fabrication of encapsulated sustainable, green, phytogenic magnetic nanoparticles (PMNPs), to inhibit the generation of secondary pollutants (Iron/ Fe o) during water treatment applications. These novel bio-magnetic membrane capsules (BMMCs) were prepared using two-step titration gel crosslink method, with polyvinyl alcohol and sodium alginate matrix as the model encapsulating materials to eliminate potentially toxic metals (Pb 2+ and Cd 2+) from water. The development of BMMCs was characterized by FTIR, XRD, XPS, SEM, VSM, TGA and EDX techniques. The effects of various operating parameters, adsorbent dose, contact time, solution pH, temperature, initial concentration of metals cations and co-existing ions were studied. The hysteresis loops have illustrated an excellent super-paramagnetic nature, demonstrating the smooth encapsulation of PMNPs without losing their magnetic properties. The maximum monolayer adsorptive capacities estimated at pH 6.5 by the Langmuir isotherm model were 548 and 610.67 mg/g for Pb 2+ and Cd 2+ , respectively. The novel BMMCs did not only control oxidation of PMNPs but also sustained the adsorptive removal over a wide range of pH (3-8), and the electrostatic interaction and ion-exchange were the core adsorption mechanisms. The BMMCs could easily be regenerated using 25% HNO3 as an eluent for successful usage in seven repeated cycles. Therefore, the BMMCs as a material can be used as an excellent sorbent or composite material to remove toxic metals Pb 2+ and Cd 2+ , showing strong potential for improving water and wastewater treatment technologies.

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Cellulose nanofibers reinforced sodium alginate-polyvinyl alcohol hydrogels: Core-shell structure formation and property characterization

Cited by 137 publications

References 47 publications

Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

Study of Cellulose Nanocrystals and Zinc Nitrate Hexahydrate Addition in Chitosan Hydrogels

Effect of Icariin on Engineered 3D-Printed Porous Scaffolds for Cartilage Repair

Encapsulated green magnetic nanoparticles for the removal of toxic Pb2+ and Cd2+ from water: Development, characterization and application

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