Encapsulation Technologies for Active Food Ingredients and Food Processing

Manojlović, Verica; Nedović, Viktor; Kailasapathy, Kasipathy; Zuidam, Nicolaas Jan

doi:10.1007/978-1-4419-1008-0

Cited by 164 publications

(12 citation statements)

References 111 publications

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“…8 insets) revealed the formation of nano-vesicles, probably containing undissolved polymer. Although HPMC is soluble in water, if the polymer particles were not thoroughly disperse in water before dissolution, a gelatinous membrane was formed around the particles preventing them from wetting completely (Wandrey et al 2010). Nevertheless, this effect it was not shown in any other studied CH:HPMC compositions (10:90,30:70,50:50,70:30 and 90:10), revealing a good compatibility/miscibility between these two natural polymers within all concentration range.…”

Section: Scanning Electron Microscopy (Sem)contrasting

confidence: 62%

Thermo-sensitive chitosan–cellulose derivative hydrogels: swelling behaviour and morphologic studies

et al. 2014

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Hydrogels are three-dimensional, hydrophilic, polymer networks that are able to imbibe large amounts of water or biological fluids, while maintaining their dimensional stability. The polymer binding might be achieved by chemical or physical interactions. Physical crosslinking of a polymer to form its hydrogel, might be accomplished either by casting-solvent evaporation (SC) method or by freeze-thaw (FT) technique. The physical hydrogels, especially the ones based on natural biopolymers, like polysaccharides, are being widely used in industry and medicine due to their favourable properties: biocompatibility; biodegradability; low toxicity and eco-friendly characteristics. Polysaccharides, like chitosan (CH) and (hydroxypropyl)methyl cellulose (HPMC) have gained great attention due to its stimuli sensitive properties: pH and temperature responsiveness, respectively. Thus, within this work we have developed physically crosslinked CH:HPMC hydrogel films, using both SC and FT techniques. The attained CH:HPMC membranes were evaluated in terms of their swelling, thermal (low critical solution temperature-LCST), structural (attenuated total reflectance Fourier transform infrared spectroscopy) and morphological (scanning electron microscopy and atomic force microscopy) properties. According to these results, the developed membranes exhibit a good miscibility between the two component biopolymers. Moreover, the CH:HPMC membranes exhibit a high swelling capacity (SW FT = 1,172 and SW SC = 7,323), a low surface roughness (Sq = 5.6-9.5 nm) and an elevated LCST (LCST = 85.2-87.5°C). The stimuli sensitive behaviour makes hydrogels appealing for the design of smart devices applicable in a variety of technological fields. In our particular case, we envisage the application of such materials as active substances (moisturisers, antiperspirants and scents) delivers, into textile substrates in a controlled manner.

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Section: Scanning Electron Microscopy (Sem)contrasting

confidence: 62%

Thermo-sensitive chitosan–cellulose derivative hydrogels: swelling behaviour and morphologic studies

et al. 2014

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“…The commonly used coating materials for encapsulation are natural polymers from plant, marine, microbial, and animal origins. This is due to their low or non-toxic property that makes them safe for food application (Wandrey et al, 2010). Chitosan and alginate are natural polymers that are non-toxic, biocompatible, and biodegradable (Skaugrud et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Anthocyanins from Black Rice (Oryza Sativa L.) Bran Extract using Chitosan-Alginate Nanoparticles

Bulatao¹,

Samin²,

Salazar³

et al. 2017

JFR

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This study was conducted to extract and encapsulate anthocyanins from black rice bran using chitosan-alginate nanoparticles. Ten black rice varieties were screened for the anthocyanin content and the variety with the highest anthocyanins was used for the encapsulation. The anthocyanins were extracted by defatting the bran with n-hexane and soaking it with 85% acidified ethanol. The crude anthocyanin extract (CAE) was freeze-dried at -110°C for 48 h and then encapsulated in chitosan-alginate nanoparticles using two processes: ionic pre-gelation and polyelectrolyte complex formation. The mass ratio of chitosan and alginate polymers used in this study was 100:10. The treatments applied were as follows: T 0 -0 mg CAE, T 1 -10 mg CAE, T 2 -20 mg CAE, and T 3 -30 mg CAE. The resulting capsules were characterized in terms of chemical properties, surface morphology, particle size, polydispersive index, encapsulation efficiency, and 2, 2-diphenyl-1-picrylhydrazyl radical scavenging activity. Screening of rice samples indicated that Ominio bran had the highest anthocyanin content (36.11 mg/g). Anthocyanins were successfully encapsulated in the matrix as shown by the Scanning Electron Microscopy images and Fourier Transform Infrared spectra of the anthocyanin-loaded chitosan-alginate nanoparticles. Among the different concentrations of CAE, T 3 had the highest encapsulation efficiency (68.9%) and antioxidant scavenging activity (38.3%) while T 1 and T 2 had the lowest. Ascending particle size was observed for T 0 (358.5 nm), T 3 (467.9 nm), T 1 (572.3 nm), and T 2 (635.9 nm). All anthocyanin-loaded capsules were found to be of nano-size (<1000 nm). The study concluded that chitosan-alginate nanoparticles can be a good encapsulating material for anthocyanin.

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“…5 In general, encapsulates can be divided into the reservoir and the matrix type. Where as in the matrix type capsules, the active ingredient is dispersed more or less uniformly in the encapsulation agent, the reservoir type consists of an active core, the reservoir, and a shell around it [2]. The article focuses in the following on the reservoir type or shell coating encapsulates.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Encapsulates of this type 45 could also be formed by methods like electrostatic atomisation which can specifically form porous coatings [5], coacervation, co-extrusion or by preparation of emulsions with multilayers [2].…”

Section: Accepted Manuscriptmentioning

confidence: 99%