Effects of crosslinking degree of poly(vinyl alcohol) hydrogel in aqueous solution: kinetics and mechanism of copper(II) adsorption

Jamnongkan, Tongsai; Wattanakornsiri, Amnuay; Wachirawongsakorn, Piyada; Kaewpirom, Supranee

doi:10.1007/s00289-014-1112-7

Cited by 32 publications

(15 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When preparing hydrogels, the degree of crosslinking is a critical issue that directly affects different properties of the material, especially the swelling kinetics. [25,32] This is a key aspect when hydrogels are prepared for drug delivery purposes. [33][34][35] For this purpose infrared spectroscopy can be used to evaluate the crosslinking degree in Gantrez 1 hydrogels.…”

Section: Crosslinking Of Mn Arrays Using Conventional Oven Assisted Pmentioning

confidence: 99%

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Larrañeta

Lutton

Brady

et al. 2015

Macromol. Mater. Eng.

View full text Add to dashboard Cite

A microwave (MW)‐assisted crosslinking process to prepare hydrogel‐forming microneedle (MN) arrays was evaluated. Conventionally, such MN arrays are prepared using processes that includes a thermal crosslinking step. Polymeric MN arrays were prepared using poly(methyl vinyl ether‐alt‐maleic acid) crosslinked by reaction with poly(ethylene glycol) over 24 h at 80 °C. Polymeric MN arrays were prepared to compare conventional process with the novel MW‐assisted crosslinking method. Infrared spectroscopy was used to evaluate the crosslinking degree, evaluating the area of the carbonyl peaks (2000–1500 cm−1). It was shown that, by using the MW‐assisted process, MN with a similar crosslinking degree to those prepared conventionally can be obtained in only 45 min. The effects of the crosslinking process on the properties of these materials were also evaluated. For this purpose swelling kinetics, mechanical characterisation, and insertion studies were performed. The results suggest that MN arrays prepared using the MW assisted process had equivalent properties to those prepared conventionally but can be produced 30 times faster. Finally, an in vitro caffeine permeation across excised porcine skin was performed using conventional and MW‐prepared MN arrays. The release profiles obtained can be considered equivalent, delivering in both cases 3000–3500 μg of caffeine after 24 h.

show abstract

Section: Crosslinking Of Mn Arrays Using Conventional Oven Assisted Pmentioning

confidence: 99%

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Larrañeta

Lutton

Brady

et al. 2015

Macromol. Mater. Eng.

View full text Add to dashboard Cite

show abstract

“…On the other hand, it is well known that pH parameter is very important for controlling the adsorption process. As reported by various researchers, optimum pH of PVA was selected to be about 6 for heavy metal adsorption . The reason for selection of this pH is that, at lower pH, the positive charge density on the surface of adsorbent and the electrostatic repulsion could be responsible to retard uptake of metal ions.…”

Section: Resultsmentioning

confidence: 99%

Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

Mallakpour

Khadem

2017

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(vinyl alcohol) (PVA) nanocomposite and modified CaCO 3 nanoparticles (NPs) were fabricated by ultrasound agitation method with particle content altering from 3, 5, and 8 wt %. The CaCO 3 surface was successfully treated by 10 wt % of bioactive dicarboxylic acid (DA). The influences of loading modified NPs on the thermal, mechanical, adsorption, contact angle, and physical properties of the poly(vinyl alcohol) nanocomposite films were thoroughly studied. The results showed that incorporation of modified CaCO 3 into the PVA matrix had better performance than the pure PVA. Meanwhile, tensile strength, Young's modulus, and thermal stability are enhanced from 33.36 MPa, 1.26 GPs, and 242.918C (neat PVA) to 81.7 MPa, 4.81 GPa, and 312.95 8C (PVA/ CaCO 3 -DA NC 5 wt %), respectively. Also, the adsorption capacity of the PVA/CaCO 3 -DA NCs 5 and 8 wt % revealed that the NC films could act as an appropriate absorbent for the removal of Cd(II) ions with maximum adsorption capacity of about 20.70 and 25.19 mg g 21 for Cd(II), respectively.

show abstract

“…Several research groups have reported several techniques for producing conducting polymers, for examples, thermomechanical processing, blending, and compositing with other polymers or inorganic materials. 11 Besides, it's well known that the dielectric permittivity of PVA is extraordinarily low. 8 PVA possesses good chemical resistance, thermal stability, high dielectric strength, and good charge storage capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, it shows high water permeability and also dissolves easily in water. 11 Besides, it's well known that the dielectric permittivity of PVA is extraordinarily low. Thus, enhancement of the dielectric permittivity of the PVA-based composite materials while maintaining their mechanical performance is important for many technological applications.…”

Section: Introductionmentioning

confidence: 99%

Improvement in physical and electrical properties of poly(vinyl alcohol) hydrogel conductive polymer composites

Phuchaduek

Jamnongkan

Rattanasak

et al. 2015

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

With an aim to develop anti-electrostatic discharge materials based on biodegradable polymers, poly(vinyl alcohol) films composited with two different conductive fillers (carbon black and aluminium) at various fillers contents (20260%wt), were manufactured using solvent-casting technique. The mechanical properties of such the films were investigated through tensile stress-strain tests. Wettability and morphology of the composite films were performed by water contact angle measurement and SEM, respectively. Young's modulus of the composite films can be increased with the addition of conductive fillers. The surface of the composite films showed non-homogeneous appearance, in which the phase boundary within the composites was clearly observed and the conductive fillers formed aggregation structure at high filler concentration. In addition, the composite films exhibited better hydrophobicity when higher conductive filler content was added. TGA results suggested that both carbon black and aluminum have proven their efficiency to enhance thermal stability of poly(vinyl alcohol). Investigation of cross-cut adhesion performance of the prepared composite films revealed that carbon black-filled composites exhibited excellent adhesion strength. The effect of conductive filler content on surface resistivity of the composite films was also examined. The experimental results confirmed that both the fillers used in this study can improve the electrical conductivity of poly(vinyl alcohol) hydrogel. The surface resistivity of the composite films was reduced by several orders of magnitude when the filler of its critical concentration was applied.

show abstract

Effects of crosslinking degree of poly(vinyl alcohol) hydrogel in aqueous solution: kinetics and mechanism of copper(II) adsorption

Cited by 32 publications

References 37 publications

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

Improvement in physical and electrical properties of poly(vinyl alcohol) hydrogel conductive polymer composites

Contact Info

Product

Resources

About

Effects of crosslinking degree of poly(vinyl alcohol) hydrogel in aqueous solution: kinetics and mechanism of copper(II) adsorption

Cited by 32 publications

References 37 publications

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Microwave‐Assisted Preparation of Hydrogel‐Forming Microneedle Arrays for Transdermal Drug Delivery Applications

Poly(vinyl alcohol)/CaCO3‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption

Improvement in physical and electrical properties of poly(vinyl alcohol) hydrogel conductive polymer composites

Contact Info

Product

Resources

About

Poly(vinyl alcohol)/CaCO₃‐diacid nanocomposite: Investigation of physical and wetting properties and application in heavy metal adsorption