Recent advances in starch, polyvinyl alcohol based polymer blends, nanocomposites and their biodegradability

Tang, Xiaozhi; Alavi, Sajid

doi:10.1016/j.carbpol.2011.01.030

Cited by 497 publications

(293 citation statements)

References 82 publications

(105 reference statements)

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“…The drying process is slightly different and also affected by the kaolin content, probably due to the differences in viscosity, and since the clay can hinder water diffusion. The clay in the polymer matrix can have an effect on the polymer crystallinity, as it has been shown that the clay induces crystalline regions near the clay platelets (Strawhecker, Manias 2000, Tang, Alavi 2011. This might explain for the observed strong increase in permeability with higher loading level of kaolin that also showed a higher degree of crystallinity for the thick films.…”

Section: Resultsmentioning

confidence: 97%

Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings

Nyflött

Carlsson

Järnström

et al. 2015

Nordic Pulp &Amp; Paper Research Journal

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SUMMARY:The permeability of dispersion barriers produced from polyvinyl alcohol (PVOH) and kaolin clay blends coated onto polymeric supports has been studied by employing two different measurement methods: the oxygen transmission rate (OTR) and the ambient oxygen ingress rate (AOIR). Coatings with different thicknesses and kaolin contents were studied. Structural information of the dispersion-barrier coatings was obtained by Fourier transform infrared spectroscopy (FTIR) spectroscopy and scanning electron microscopy (SEM). These results showed that the kaolin content influences both the orientation of the kaolin and the degree of crystallinity of the PVOH coating. Increased kaolin content increased the alignment of the kaolin platelets to the basal plane of the coating. Higher kaolin content was accompanied by higher degree of crystallinity of the PVOH. The barrier thickness proved to be less important in the early stages of the mass transport process, whereas it had a significant influence on the steady-state permeability. The results from this study demonstrate the need for better understanding of how permeability is influenced by (chemical and physical) structure.

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Section: Resultsmentioning

confidence: 97%

Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings

Nyflött

Carlsson

Järnström

et al. 2015

Nordic Pulp &Amp; Paper Research Journal

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“…Polyvinyl alcohol (PVA) is a biodegradable polymer with vast use in paper and textile industry; it is available industrially with several hydrolysis degree and molecular weight, and these characteristics can affect the properties of the materials produced with PVA blends [1,2] , and PVA can be processed by thermoplastic extrusion [3] .…”

Section: Introductionmentioning

confidence: 99%

Biodegradable blends of starch/polyvinyl alcohol/glycerol: multivariate analysis of the mechanical properties

et al. 2016

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SbstractThe aim of the work was to study the mechanical properties of extruded starch/polyvinyl alcohol (PVA)/glycerol biodegradable blends using multivariate analysis. The blends were produced as cylindrical strands by extrusion using PVAs with different hydrolysis degrees and viscosities, at two extrusion temperature profiles (90/170/170/170/170 °C and 90/170/200/200/200 °C) and three conditioning relative humidities of the samples (33, 53, and 75%). The mechanical properties showed a great variability according to PVA type, as well as the extrusion temperature profile and the conditioning relative humidity; the tensile strength ranged from 0.42 to 5.40 MPa, elongation at break ranged from 10 to 404% and Young's modulus ranged from 0.93 to 13.81 MPa. The multivariate analysis was a useful methodology to study the mechanical properties behavior of starch/PVA/glycerol blends, and it can be used as an exploratory technique to select of the more suitable PVA type and extrusion temperature to produce biodegradable materials.

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“…[3] Many degradable materials have been applied on shell eggs to preserve the internal qualities, including synthetic polymers such as polysaccharides and proteins. [3][4][5][6][7][8] However, little information is available about the preservation effect of degradable coatings on SDEs. Wang et al [9] reported that composite coating based on nano-SiO 2 -modified polyvinylidene chloride could significantly (p < 0.05) reduce quality deterioration of SDEs such as weight loss, total volatile basic nitrogen (TVB-N), and total bacterial counts.…”

Section: Introductionmentioning

confidence: 99%

Effect of bilayer coating composed of polyvinyl alcohol, chitosan, and sodium alginate on salted duck eggs

Jiang

Zhuang

Zhong

et al. 2018

International Journal of Food Properties

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The composite bilayer film based on polyvinyl alcohol, sodium alginate, and chitosan were developed in this study, and the effects of the related coating on internal-quality changes of salted duck eggs (SDEs) during storage were determined. The results showed that the overall properties of the bilayer film were better than those of monolayer films, including storage stability. Coatings could significantly (p < 0.05) reduce quality deterioration of SDEs such as water loss, oil exudation, and gritty. The bilayer coating was more effective in inhibiting the increase of egg yolk pH and total bacterial counts than monolayer coatings. After storage for 60 days, water content of bilayer coated SEDs was 19.7% higher than that of the control SDEs, oil exudation was 38% higher, and gritty texture was 27.9% higher. Moreover, bilayer coating could prolong the shelf life of SDEs to more than 60 days at 25°C and 50% relative humidity according to the results of total bacterial count experiment, while the shelf life of control SDEs was less than 45 days. This study indicated the potential application of bilayer composite coating for preservation of SDEs. ARTICLE HISTORY

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Recent advances in starch, polyvinyl alcohol based polymer blends, nanocomposites and their biodegradability

Cited by 497 publications

References 82 publications

Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings

Influence of kaolin addition on the dynamics of oxygen mass transport in polyvinyl alcohol dispersion coatings

Biodegradable blends of starch/polyvinyl alcohol/glycerol: multivariate analysis of the mechanical properties

Effect of bilayer coating composed of polyvinyl alcohol, chitosan, and sodium alginate on salted duck eggs

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