Clay‐filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites

Staroszczyk, Hanna; Gottfried, Karolina; Malinowska‐Pańczyk, Edyta; Kołodziejska, Ilona

doi:10.1002/star.201500325

Cited by 13 publications

(17 citation statements)

References 39 publications

(77 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Then, dispersion of nanoclay at predetermined concentration was added to gelatin solution, followed by ultrasound‐assisted homogenization for 15 min. The final concentration of gelatin amounted to 5%, w/w, and nanoclays ranged 5–15% of gelatin mass, w/w (Staroszczyk, Gottfried, Malinowska‐Pańczyk, & Kołodziejska, ). Films were prepared manually by casting the film‐forming dispersion on a polyester surface and drying at room temperature for 24–48 hr.…”

Section: Methodsmentioning

confidence: 99%

Fish gelatin-nanoclay films. Part I: Effect of a kind of nanoclays and glycerol concentration on mechanical and water barrier properties of nanocomposites

Staroszczyk

Malinowska‐Pańczyk

Gottfried

et al. 2017

Journal of Food Processing and Preservation

Self Cite

View full text Add to dashboard Cite

The aim of work was the improvement of the mechanical and water barrier properties of nanocomposites prepared from fish gelatin and nanoclays (5–15%), plasticized with glycerol at different concentrations. The effect of hydrophilic Cloisite Na+ and Nanomer®PGV was compared with that exerted by organically modified more hydrophobic Nanofil®2 and NanoBent ZR‐1. Antimicrobial activity of nanocomposites containing hydrophobic nanoclays was also investigated. In a nanocomposite with 5% Cloisite Na+ and 15% glycerol, the Tensile strength (TS) was by 20% higher than that for plasticized films without nanoclay. The improvement of TS was also evidenced for plasticized nanocomposites containing 5% of hydrophobic NanoBent ZR‐1 and Nanofil®2. Nanocomposites containing 5% of Cloisite Na+ with 15% glycerol, and these containing 5% Nanofil®2 or NanoBent ZR‐1 with 20% glycerol, showed 23% and about 15%, respectively, lower water vapor permeability than gelatin films. Gelatin‐NanoBent ZR‐1 nanocomposite caused complete inactivation of gram‐positive bacteria S. aureus and L. innocua. Practical applications The environmentally friendly food packaging materials based on natural polymers such as proteins and polysaccharides are promising alternative for nonbiodegradable, synthetic packages. The other advantage is using for the preparation of fish gelatin that can be obtained from fish industry offals, mainly skins—very burdensome for the environment. As packages based on natural polymers are most often edible, fish gelatin matrices are important for healthy and religious reasons. Incorporating fillers like some nanoclays into gelatin films can be a promising way for improving their mechanical strength and barrier properties against water. About 5% addition of hydrophilic Cloisite Na+ or 5% addition of hydrophobic NanoBent ZR‐1 increases tensile strength of gelatin films plasticized with 15% glycerol. Additionally, activity of NanoBent ZR‐1 against gram‐positive bacteria allow to obtain active packaging material that can be useful in extending the shelf life and keeping high quality of the food products.

show abstract

Section: Methodsmentioning

confidence: 99%

Fish gelatin-nanoclay films. Part I: Effect of a kind of nanoclays and glycerol concentration on mechanical and water barrier properties of nanocomposites

Staroszczyk

Malinowska‐Pańczyk

Gottfried

et al. 2017

Journal of Food Processing and Preservation

Self Cite

View full text Add to dashboard Cite

show abstract

“…where m 0 is the initial weight of the sample and m1 is the weight of the sample after immersing into the solvent milliQ water in which the solvent specimens were cleared by using filter paper. The density of the crosslinking is then calculated from the equilibrium swelling data by means of the Flory-Rehner equations (John et al, 2008;Saleesung et al, 2017;:…”

Section: Evaluation Of the Film's Swelling And Crosslinking Densitymentioning

confidence: 99%

“…The Diff usion coeffi cient (D) is a kinetic parameter which indicates the rate of solvent diff usion into the system, which can be correlated with the segmental mobility of the polymer chains. The Diff usion coeffi cient can be calculated using the formula of Fickian law (Schurtenberger and Brown, 1996): where h is the thickness of the sample and θ is the slope of linear portion of the sorption curve. The diff usivity of solvent is influenced strongly by the microstructure of the matrix, as well as the reinforcing phase, such as the pores that may form during the drying process.…”

Section: Transport Propertiesmentioning

confidence: 99%

“…However, most of the packaging material based on biopolymers faces the drawback of poor mechanical and barrier properties. Excessive studies have been thus conducted to reduce the water sensitivity of biopolymer composites, which include blending, crosslinking and chemical modifications (Staroszczyk et al, 2017;Luchese et al, 2017;Zhang et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Physicochemical, mechanical, barrier and antibacterial properties of starch nanocomposites crosslinked with pre-oxidised sucrose

Balakrishnan

Sreekala²,

Geethamma

et al. 2019

Industrial Crops and Products

View full text Add to dashboard Cite

Bionanocomposite films were fabricated using starch as a matrix, pre-oxidised sucrose as a crosslinker and cellulose nanofibres as reinforcement filler. The spectroscopic (FTIR) and microscopic (SEM) techniques were used to identify the chemical changes associated with the crosslinking, and to characterize the morphological structure of the films. The crosslinking density evaluated by Flory-Rehnar equation. There is a decrease in diff usivity, permittivity and swelling properties of the films after crosslinking. Reduction of water vapour (from 0.074 to 0.038 g min−1 m-2) and oxygen (from 29.44 to 10.27 cm 3 m-2 d −1) transmission rates for film prepared with 3 wt.% of OS and 5 wt.% of CNFs was observed. The water transport through the films was found to follow Fickian behaviour. The antibacterial properties of films against four diff erent food pathogens were evaluated. Films represent high potential alternative to existing ones.

show abstract

“…A permeabilidade ao vapor (PVA) de água em filmes hidrofílicos depende tanto da difusividade como da solubilidade das moléculas de água na matriz polimérica. Quando a matriz é reforçada com nanopartículas, uma via tortuosa é formada ao longo do filme aumentando assim o comprimento do percurso de difusão da molécula de água, e consequentemente diminuindo a PVA dos compósitos (STAROSZCZYK et al, 2017).…”

Section: Propriedades De Barreiraunclassified

Desenvolvimento e caracterização de bionanocompósitos pelo método de extrusão

Llanos¹,

Humberto²

View full text Add to dashboard Cite

Aiming at the development of biodegradable packaging materials, starch/chitosan blends structured with montmorillonite nanoparticles (MMT) or bamboo nanofibers (NFBs) at concentrations of (0.0,0.5 and 1.0) g NPs/100 g of polymer were obtained by the casting and extrusion techniques. The obtained bio-nanocomposites were characterized, as well as, how the dispersion of nanoparticles influenced the main physicochemical properties of the films. For the films from starch/chitosan blends produced by the casting method, the proportions of (5/0, 3.75/0.25, 2.5/2.5, 1.25/0.75 and 0/1) g/100 g based on polymer, were tested and the introducing of the reinforcers into filmogenic solution were evaluated. Satisfactory dispersion and exfoliation of MMT in bio-nanocomposites were confirmed by changes of crystallinity due to displacement of the characteristic peak from 7.2 ° to 5.2 °. In the same way, films structured with NFBs showed variations of the vibrational frequencies of the molecular arrangements indicating strong bonds between the polymer blends and the reinforcers. By the extrusion from the mixture of homo pellets and masterbatch pellets, from starch/chitosan blends at proportions of (100/0, 75/25 and 50/50) g/100 g, the obtained films have exhibited changes of the crystallinity and the molecular interactions. In relation to mechanical properties, the films presented increase of the tension response as well as the elongation and modulus of elasticity in relation to the reinforcer concentration in each evaluated blend. On the other hand, the formation of polymer blends and the interactions of reinforcers with the matrix changed significantly the three-dimensional network and consequently the water vapor transmission (WVT). Films produced from starch/chitosan 100/0, nanostructured with (0.5 and 1.0) g MMT/100 g, exhibited lower values of WVT 155 e 139) gm-2 d-1 , respectively, when compared to commercial products such as Bionolle ™ (PBS) 330 g m-2 d-1) and (PBAT) Ecoflex® (272 g m-2 d-1). In this work, it was possible to develop a promising material with desired characteristics in the biodegradable packaging sector with wide application in the industry.

show abstract

Clay‐filled starch films. Part I: Effect of clay kind and glycerol concentration on functional properties of composites

Cited by 13 publications

References 39 publications

Fish gelatin-nanoclay films. Part I: Effect of a kind of nanoclays and glycerol concentration on mechanical and water barrier properties of nanocomposites

Fish gelatin-nanoclay films. Part I: Effect of a kind of nanoclays and glycerol concentration on mechanical and water barrier properties of nanocomposites

Physicochemical, mechanical, barrier and antibacterial properties of starch nanocomposites crosslinked with pre-oxidised sucrose

Desenvolvimento e caracterização de bionanocompósitos pelo método de extrusão

Contact Info

Product

Resources

About