Development of Starch Biofilms Using Different Carboxylic Acids as Plasticizers

Cruz, Luana Conceição da; Miranda, Cleidiene Souza de; Santos, Wilton J.; Gonçalves, Ana Paula Bispo; Oliveira, Jamerson Carneiro de; José, Nadia Mamede

doi:10.1590/1516-1439.370814

Cited by 10 publications

(2 citation statements)

References 9 publications

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“…36 The thermogram also exhibited an endothermic peak at about 323 °C related to the melting point of quercetin 47,48 with a shoulder at about 300 °C attributed to the starch degradation. 49 Instead, the DSC curve of the QUERC/CAA system showed a first broad endothermic peak corresponding to the dehydration, with a trend closely similar to that of CAA reported in a previous work up to about 280 °C. 34 Then, the second endothermic peak at about 327 °C was ascribed to the quercetin decomposition.…”

Section: Industrial and Engineering Chemistry Researchsupporting

confidence: 93%

Supercritical Adsorption of Quercetin on Aerogels for Active Packaging Applications

Franco

Aliakbarian

Perego

et al. 2018

Ind. Eng. Chem. Res.

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Quercetin, a flavonoid with outstanding antioxidant and antimicrobial properties, was adsorbed onto maize starch aerogel (MSA) and calcium alginate aerogel (CAA) through supercritical carbon dioxide adsorption. The composite systems may be applied in active packaging for food preservation. Supercritical adsorption experiments were performed at 180 bar and 40 and 60 °C. They showed that the higher amount of charged quercetin was obtained at 60 °C onto CAA as support. Field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffractometry (XRD), specific surface area (SSA) determination, and differential scanning calorimetry (DSC) were used to characterize the composite systems. In vitro dissolution tests were also performed to study the possibility of employing quercetin adsorbed onto MSA and CAA as an active layer in food packaging.

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Section: Industrial and Engineering Chemistry Researchsupporting

confidence: 93%

Supercritical Adsorption of Quercetin on Aerogels for Active Packaging Applications

Franco

Aliakbarian

Perego

et al. 2018

Ind. Eng. Chem. Res.

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“…Many authors have investigated possible reactions between dicarboxylic compounds and starch, which is structural isomer of cellulose, due to the easily accessible functional groups [4][5][6]. Caldwell, in his patent (1953), proposed that polysaccharides can be modified with a substituted cyclic dicarboxylic compound (dicarboxylic acids and their corresponding anhydrides) via esterification.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Modification with Maleic Anhydride

Fridrihsone

Zoldners

Skute

et al. 2022

MSF

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Cellulose modification is a challenge due to molecules characteristics – equatorial conformation, hydrogen bonds both withing molecule and among neighboring molecules etc. Esterification of cellulose hydroxyl groups (-OH) with dicarboxylic compounds is challenging. In presented study simple modification with maleic anhydride is performed in an anhydrous environment. Scanning electron microscopy reveals clean fibers of cellulose-maleic anhydride derivatives. FTIR proves unique peak at 1735cm-1 that corresponds to ester carbonyl groups. Titration of carboxylic (-COOH) groups solidifies that one part of anhydride has bonded with cellulose and other carboxylic groups is accessible for further development.

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Printable acid-modified corn starch as non-toxic, disposable hydrogel-polymer electrolyte in supercapacitors

et al. 2019

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Corn starch and citric acid, two low-cost and abundant materials, were used for establishing a novel screen printable hydrogel for printed electronics applications.Corn starch was modified with citric acid by melt-blending, the so obtained thermoplastic starch was ground to powder and added to a water-starch suspension. Ultrasonication was used to prepare hydrogels of different citric acid concentrations.The most promising hydrogel contained 10 % citric acid by weight, provided an ionic conductivity of (2.30 ± 0.07) mS•cm -1 and appropriate rheological properties for screen and stencil printing. The hydrogel shows superb printability and prolonged stability against degradation. The corn starch hydrogel was used as printable gel polymer electrolyte in fully printed supercapacitors. The specific capacitance of the printed supercapacitor reached 54 F•g -1 . The printable hydrogel polymer electrolyte is easy to produce without in-depth chemical knowledge, is based on widely used and non-toxic materials and may be used as a functional layer in other printed electronics applications such as printed batteries.

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Development of Starch Biofilms Using Different Carboxylic Acids as Plasticizers

Cited by 10 publications

References 9 publications

Supercritical Adsorption of Quercetin on Aerogels for Active Packaging Applications

Supercritical Adsorption of Quercetin on Aerogels for Active Packaging Applications

Cellulose Modification with Maleic Anhydride

Printable acid-modified corn starch as non-toxic, disposable hydrogel-polymer electrolyte in supercapacitors

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