Transparent organic–inorganic nanocomposites membranes based on carboxymethylcellulose and synthetic clay

Oliveira, Ricardo Augusto Rabelo; Barud, Hernane da Silva; Salvi, Denise Toledo Bonemer De; Perotti, Gustavo Frigi; Ribeiro, Sidney J. L.; Constantino, Vera Regina Leopoldo

doi:10.1016/j.indcrop.2015.02.015

Cited by 31 publications

(14 citation statements)

References 43 publications

(54 reference statements)

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“…Figure 2 represents the surface and cross-sectional SEM images of the BS/ZnO-N films. The homogeneity of materials in the samples is generally analysed by BSE (de Oliveira et al, 2015). White particles were uniformly dispersed throughout the BS film and were more recognisable on the surface of the BS/ZnO-N films (Fig.…”

Section: Uv-visible Light Transmittancementioning

confidence: 99%

Antimicrobial activity of buckwheat starch films containing zinc oxide nanoparticles against Listeria monocytogenes on mushrooms

Kim

Song

2018

Int J of Food Sci Tech

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Summary Buckwheat starch (BS) films containing zinc oxide nanoparticles (ZnO‐N; 0%, 1.5%, 3% and 4.5%) were prepared, and their physical, optical and antimicrobial properties were examined. As ZnO‐N content increased from 0% to 4.5%, TS increased from 14.99 to 19.09 MPa and E decreased from 25.60% to 20.65%. In addition, L* and a* values decreased, whereas b*, ΔE and opacity increased. Regarding antimicrobial activity, the BS/ZnO‐N films had the reductions of 2.96–3.74 log CFU mL−1 against Listeria monocytogenes after 8 h based on viable cell count assay. The BS film containing 3% ZnO‐N, an optimal concentration chosen in this study, was applied to fresh‐cut mushroom packaging, and the film exhibited antimicrobial activity against L. monocytogenes, resulting in a reduction of 0.86 log CFU g−1 after 6 days of storage. Thus, these results indicate that the BS/ZnO‐N film can be used as a biodegradable packaging material.

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Section: Uv-visible Light Transmittancementioning

confidence: 99%

Antimicrobial activity of buckwheat starch films containing zinc oxide nanoparticles against Listeria monocytogenes on mushrooms

Kim

Song

2018

Int J of Food Sci Tech

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“…Polysaccharides have more advantages; they are cheap, nontoxic biodegradable, and easy to modify. However, in the field of SAPs polysaccharides did not meet the requirements in terms of absorption and mechanical properties [ 7 ]. For this reason, a lot of research effort had been employed both in academic and industrial institutions to solve the problem [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization Superabsorbent Polymers Made of Starch, Acrylic Acid, Acrylamide, Poly(Vinyl Alcohol), 2-Hydroxyethyl Methacrylate, 2-Acrylamido-2-methylpropane Sulfonic Acid

Czarnecka

Nowaczyk

2021

IJMS

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Three polymers with excellent absorption properties were synthesized by graft polymerization: soluble starch-g-poly(acrylic acid-co-2-hydroxyethyl methacrylate), poly(vinyl alcohol)/potato starch-g-poly(acrylic acid-co-acrylamide), poly(vinyl alcohol)/potato starch-g-poly(acrylic acid-co-acrylamide-co-2-acrylamido-2-methylpropane sulfonic acid). Ammonium persulfate and potassium persulfate were used as initiators, while N,N′-methylenebisacrylamide was used as the crosslinking agent. The molecular structure of potato and soluble starch grafted by synthetic polymers was characterized by means of Fourier Transform Infrared Spectroscopy (FTIR). The morphology of the resulting materials was studied using a scanning electron microscope (SEM). Thermal stability was tested by thermogravimetric measurements. The absorption properties of the obtained biopolymers were tested in deionized water, sodium chroma solutions of various concentrations and in buffer solutions of various pH.

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“…Hence, when the content of LDHs increased from 5 wt.% to 10 wt.%, the cross section of the film was coarser, and when the LDHs content continued to increase to 15 wt.% or even 25 wt.%, the cross section of the composite film aggregated a large number of LDHs particles with obvious phase separation. This is because with the increase of LDHs contents, the LDHs agglomerated in the CNFs, and then gradually formed intercalation or aggregation structure, which resulted in the increase of membrane space and phase separation (Oliveira et al 2015).…”

Section: Resultsmentioning

confidence: 99%

Preparation and Barrier Properties of Nanocellulose / Layered Double Hydroxide Composite Film

Wang

et al. 2017

BioResources

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Cellulose nanofibrils (CNFs) were oxidized by the TEMPO oxidation system from bleached kraft eucalyptus pulp, and layered double hydroxides (LDHs) were prepared via the hydrothermal method. MgAl-CO3-LDHs/CNFs composite films with different LDH ratios were prepared via a filtering/evaporation technique that endowed the nanocomposites with barrier and strengthening properties. The MgAl-CO3-LDHs could uniformly disperse in the CNFs matrix with an improved reciprocal adhesion, and the surface result was smooth and continuous. The basic structure of the membrane did not change, but the thermodynamic properties and the water vapor barrier property improved. This composite membrane can be widely used in food, pharmaceutical, and chemical packaging industries as a gas-liquid barrier material. Keywords INTRODUCTIONCellulose nanofibrils (CNFs) film was peeled off from CNFs water suspension. This type of film exhibits environmental friendliness, high transparency, high mechanical performance, and enhanced gas barrier properties. With these multifunctional combinations, these nanocomposites have wide application prospects in the encapsulation of drugs, tissue engineering, or outdoor load-bearing applications. The transparency of the CNFs film was achieved by air-drying, which simultaneously improved the tensile strength and oxygen barrier properties. Because hydrogen bonding in cellulosic nanoparticles forms a dense percolating network, and the penetration of molecules is difficult in the crystalline domains of cellulose microfibrils, these composite films have been suggested for use as barrier films (Fukuzumi 2009;Belbekhouche et al. 2011). Due to the high hydrophilicity of nanocellulose, the fiber network of CNFs membrane material is loose, and the mechanical properties decrease when wet (Lavoine et al. 2012). To improve the barrier properties of CNFs based film materials, chemically modified CNFs were used, and lamellar substances were also added to extend the path of small molecules in the CNFs infiltration. Talc platelets (Liimatainen et al. 2013) and montmorillonite platelets (Wu et al. 2012) were used to increase gas barrier properties of the CNFs film. Compared with other typical platelet-like inorganic materials, the aspect ratio of layered double hydroxides (LDHs) nanosheets can be easily adjusted during the synthesis process. As an important nanoscale material, LDHs have a hydrophobic nature and layered structures, which make the movement of gas and water molecules become complex and difficult. LDHs improve the gas barrier properties of CNF films, as illustrated in Fig. 1 (Qian et al. 2015).LDHs were prepared via a hydrothermal method, and CNFs were prepared by TEMPO oxidation / homogenization (Saito et al. 2007). The MgAl-CO3-LDHs were PEER-REVIEWED BRIEF COMMUNICATION bioresources.com Wang et al. (2018). "Nanocellulose composite," BioResources 13(1), 1055-1064. 1056 incorporated into the CNFs via a filtering/evaporation technique, which strengthened the nanocomposites. The MgAl-CO3-LDHs dispersed uniformly int...

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Transparent organic–inorganic nanocomposites membranes based on carboxymethylcellulose and synthetic clay

Cited by 31 publications

References 43 publications

Antimicrobial activity of buckwheat starch films containing zinc oxide nanoparticles against Listeria monocytogenes on mushrooms

Antimicrobial activity of buckwheat starch films containing zinc oxide nanoparticles against Listeria monocytogenes on mushrooms

Synthesis and Characterization Superabsorbent Polymers Made of Starch, Acrylic Acid, Acrylamide, Poly(Vinyl Alcohol), 2-Hydroxyethyl Methacrylate, 2-Acrylamido-2-methylpropane Sulfonic Acid

Preparation and Barrier Properties of Nanocellulose / Layered Double Hydroxide Composite Film

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