Effects of the addition of boric acid on the physical properties of MXene/polyvinyl alcohol (PVA) nanocomposite

Woo, Jeong Hyeon; Kim, Nam Hoon; Kim, Seong Il; Park, Ok-Kyung; Lee, Joong Hee

doi:10.1016/j.compositesb.2020.108205

Cited by 95 publications

(39 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A summary of several approaches and the corresponding values is given in Table 1 . While one of the lowest values, 0.3

, was obtained by Tsurko et al ( 9 ) with 100 to 1,000 times spray coating of PVA on PET, leading to a dry film thickness of 700 nm, values of higher than 100

are reported for free-standing films ( 10 – 13 ). But apart from these, a typical value for one time coating on flexible films, which was reported as 1 to 6

, has been set as a comparative value within this study ( 14 – 18 ).…”

Section: Introductionmentioning

confidence: 91%

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

et al. 2022

View full text Add to dashboard Cite

Materials with high barrier properties against oxygen are required for the packaging of many sensitive foods. Since commodity polymers lack these properties, additional barrier materials are used in plastic-based barrier packaging. These are usually more expensive than commodity polymers and, in higher fractions, also make recycling more difficult. Current developments, therefore, aim at barrier layers that are as thin as possible but retain the barrier properties. One approach is to incorporate nanoparticles into these layers. In this study, the barrier properties of nanocomposite coatings, consisting of unmodified polyvinyl alcohol (PVA), and dispersed stick-shaped halloysite (Hal) or platelet-shaped montmorillonite (MMT) silicate nanoparticles, were investigated. The PVA was dissolved in aqueous nanoparticle dispersions, which were prepared by mechanical shearing, to produce the so-called “nanolacquer.” Nanolacquers with nanoparticle concentrations of 7, 30, and 47 vol% with respect to PVA were applied in a single process step with k-bar on a polypropylene substrate film. The integration of 30 vol% platelet-shaped MMT enhances the barrier performance in comparison to pure PVA by a factor of 12 and 17 for oxygen and helium, respectively. Scanning electron microscopy (SEM) shows a homogeneous distribution and a parallel alignment of the nanoparticles within the coated layer. An increase in the crystallinity of PVA was observed due to the nanoparticle integration as demonstrated by x-ray diffraction (XRD) measurements. The investigation by Fourier transform infrared (FTIR) spectroscopy and the activation energy of the permeation coefficient indicate an interaction between the nanoparticles and the PVA. The theoretically calculated values for barrier enhancement accord well with the experimental values, which emphasizes that the gas barrier improvement for oxygen and helium is mainly dominated by the tortuous path effect.

show abstract

“…A summary of several approaches and the corresponding values is given in Table 1 . While one of the lowest values, 0.3

, was obtained by Tsurko et al ( 9 ) with 100 to 1,000 times spray coating of PVA on PET, leading to a dry film thickness of 700 nm, values of higher than 100

are reported for free-standing films ( 10 – 13 ). But apart from these, a typical value for one time coating on flexible films, which was reported as 1 to 6

, has been set as a comparative value within this study ( 14 – 18 ).…”

Section: Introductionmentioning

confidence: 91%

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

et al. 2022

View full text Add to dashboard Cite

show abstract

“…When boric acid was added as a cross-linking agent, the folds were disappeared and the surface become rough (Figure 1bd). The rough fracture surface can be attributed to the interfacial interaction between boric acid and starch (Woo et al, 2020). Furthermore, with the addition of the ANT in the film, the roughness…”

Section: Semmentioning

confidence: 99%

Preparation and evaluation of a novel intelligent starch‐based film with both color indication and antibacterial function

Dai

et al. 2021

J. Food Process. Preserv.

View full text Add to dashboard Cite

show abstract

“…After 48 h of repairing them in water, the scratches on the surface basically disappeared. Li et al [37] used polyetheramine (PEA) as the core material and polymethyl methacrylate (PMMA) as the shell material to prepare a series of curing agent microcapsules by solvent evaporation. The microcapsules with different morphologies, shell wall thickness and particle size distribution were obtained by adjusting the reaction temperature, core to shell ratio, stirring speed, emulsifier concentration and other process conditions.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Self-Healing Application of Isocyanate Prepolymer Microcapsules

Xiang

et al. 2022

Coatings

View full text Add to dashboard Cite

In this study, we successfully manufactured polyurethane microcapsules containing isocyanate prepolymer as a core material for self-healing protection coatings via interfacial polymerization of a commercial polyurethane curing agent (Bayer L-75) and 1,4-butanediol (BDO) as a chain extender in an emulsion solution. With an optical microscope (OM) and a scanning electron microscope (SEM), the resulting microcapsules showed a spherical shape and an ideal structure with a smooth surface. Fourier transform infrared spectra (FTIR) showed that the core material was successfully encapsulated. Thermal gravimetric analysis (TGA) showed that the initial evaporation temperature of the microcapsules was 270 °C. In addition, we examined the influence of the concentration of the emulsifier and chain extender on the structure and morphology of the microcapsules. The results indicate that the optimal parameters of the microcapsule are an emulsifier concentration of 7.5% and a chain extender concentration of 15.38%. Microcapsules were added to the epoxy resin coating to verify the coating’s self-healing performance by a surface scratch test, and the results showed that the cracks could heal in 24 h. Furthermore, the self-healing coating had excellent corrosion resistance.

show abstract

Effects of the addition of boric acid on the physical properties of MXene/polyvinyl alcohol (PVA) nanocomposite

Cited by 95 publications

References 49 publications

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

Nanocomposite Coatings Based on Polyvinyl Alcohol and Montmorillonite for High-Barrier Food Packaging

Preparation and evaluation of a novel intelligent starch‐based film with both color indication and antibacterial function

Preparation and Self-Healing Application of Isocyanate Prepolymer Microcapsules

Contact Info

Product

Resources

About