Biopolymer-Clay Nanocomposites: Cassava Starch and Synthetic Clay Cast Films

Perotti, Gustavo Frigi; Tronto, Jairo; Bizeto, Marcos A.; Izumi, Celly Mieko Shinohara; Temperini, Márcia L. A.; Lugão, Ademar B.; Parra, D.F.; Constantino, Vera Regina Leopoldo

doi:10.5935/0103-5053.20130300

Cited by 19 publications

(23 citation statements)

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“…Similar results were reported by Haraguchi et al (2005) and Haraguchi and Li (2006) for hydrogels reinforced with laponite. Most recently, Chung et al (2010), Aouada et al (2011), Tang and Alavi (2012) and Perotti et al (2014) demonstrated that laponite can improve the resistance, rigidity, water resistance and water vapor permeability in films based on corn starch, then laponite could be a compatibilizer and cross-linking agent between starch chains.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite-forming solutions based on cassava starch and laponite: Viscoelastic and rheological characterization

Valencia

Moraes

Hilliou

et al. 2015

Journal of Food Engineering

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a b s t r a c tNanocomposites-forming solutions (NFS) based on cassava starch and laponite were prepared and next characterized by means of dynamic oscillatory and steady shear rheological tests to evaluate their ability to be processed by knife coating. The effects of speed (rpm) and homogenization time on the laponite dispersion characteristics were first analyzed. Laponite dispersions were affected by both process parameters. High speed (rpm), i.e. 20,000 or 23,000 rpm for 30 min or prolonged homogenization time (10,000 rpm 6 speed agitation 6 23,000 rpm, for 60 min) led to high f-potential values, with laponite particles size <80 nm. With addition of laponite nanoparticles to cassava starch dispersion, an evident transition in NFS from liquid-like viscous to solid-like elastic behavior was observed. Rheological results indicated that laponite nanoparticles induced new interactions with starch chains allowing to obtain a network structure typical of a semi-rigid gel which shows some spread ability.

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Section: Introductionmentioning

confidence: 99%

Nanocomposite-forming solutions based on cassava starch and laponite: Viscoelastic and rheological characterization

Valencia

Moraes

Hilliou

et al. 2015

Journal of Food Engineering

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“…In relation to the tensile strength and elastic modulus, nanocomposite scaffolds presented higher values in comparison to pure chitosan. This phenomenon occurs due to the nanoscale interaction between chitosan and Lap, increasing the necessary force to promote the slippage of the polymer chains (Perotti et al, ).…”

Section: Discussionmentioning

confidence: 99%

Chitosan‐laponite nanocomposite scaffolds for wound dressing application

et al. 2019

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The pivotal issue of skin regeneration research is the development of effective biomaterials that exhibit biological activities as fungicide and bactericide, combining simple and low cost manufacturing technologies. In this context, nanocomposite scaffolds based on chitosan (Ch)/Laponite (Lap) were produced by using different concentrations of Lap via freeze‐drying process for potential application in skin regeneration. The influence of Lap concentration on the scaffold properties was evaluated. The prepared scaffolds were characterized by x‐ray diffraction (XRD), scanning electron microscopy (SEM), porosity, swelling capacity, and mechanical analyses. The results revealed that the scaffolds exhibited a porous architecture, besides the increase in the clay content, leads to an increase in the porosity, an improvement of mechanical strength, and a decrease of swelling capacity. In vitro tests were also carried out to evaluate the biocompatibility of the materials, such as bioadhesion, antibacterial activity, viability, and cell adhesion. Viability and cell adhesion demonstrated that all scaffolds were not cytotoxic and the fibroblast cells readily attached on the surface of the scaffolds. Thereby, the results suggested that the nanocomposite scaffolds are biomaterials potentially useful as wound dressings.

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“…They are an interesting alternative to replace the non-renewable sources, especially oil-based plastics. Some examples of biopolymers that have been used for this purpose in composites field are starch, cellulose, bacterial cellulose (BC) and carboxymethylcellulose (CMC) De Salvi et al, 2012;Hessler and Klemm, 2009;Legnani et al, 2008;Marins et al, 2013;Perotti et al, 2013Perotti et al, , 2014Salvi et al, 2014;Wang et al, 2012), among others.…”

Section: Introductionmentioning

confidence: 99%