Study on the Influence of Bio-Based Packaging System on Sodium Benzoate Release Kinetics

Abstract

The influence of film structure on the release kinetics of sodium benzoate (SB) from polymeric films is addressed in this study. In particular, four film structures were investigated, two monolayer and two multilayer systems. In particular, in one case, the active substance was uniformly distributed into a chitosan-based matrix, and in the other one, it was previously incorporated into alginate beads before dispersion in the chitosan film, thus realizing two types of monolayer films; on the other hand, the same chitosan film with SB encapsulated in alginate beads was used as the inner layer of a multilayer system constituted by two side films of alginate. The two alginate-based layers were made with two different thicknesses, thus producing a total of two multilayer systems. The release of SB from the above-mentioned films in water was studied by means of a UV/VIS spectrophotometer at 227 nm. A first-order kinetics-type equation was used to quantitatively describe the release data. Results suggest that the film structure strongly affected the release kinetics. In fact, monolayer films showed single-stage release kinetics, whereas the two investigated multilayer systems showed two-stage release kinetics. Further, the presence of alginate beads strongly affected the SB release, thus suggesting the potential of encapsulation to control the release mechanism of active compounds.

Tubular Cellulose from Orange Juice By-Products as Carrier of Chemical Preservatives; Delivery Kinetics and Microbial Stability of Orange Juice

“…Regarding the effect of encapsulation method, the use of SG seems more appropriate since slower SB delivery is achieved. The presence of SG strongly affected the SB release, thus suggesting the potential of SG encapsulation to control the release mechanism of active compounds, as was also reported in the case of alginate beads [21]. This may be attributed to the better encapsulation of SB and to the starch gel matrix that permits low SB mobility.…”

The Structuring of Sage (Salvia officinalis L.) Extract-Incorporating Edible Zein-Based Materials with Antioxidant and Antibacterial Functionality by Solvent Casting versus Electrospinning

“…The use of biodegradable polymers from natural, renewable sources is of great interest due to ever-growing environmental concerns related to the traditionally used petroleum-derived polymeric packaging materials, primarily regarding the depletion of natural resources and waste-accumulation problems. In this respect, biopolymer-based packaging materials represent a potential sustainable replacement for conventional polymeric materials for specific applications [12,16,17]. The revaluation of agro-industrial by-products as resources for the development of bio-based materials is of interest from economic and environmental perspectives [16].…”

Progresses in Food Packaging, Food Quality, and Safety—Controlled-Release Antioxidant and/or Antimicrobial Packaging

“…It is particularly effective in acidic foods. It was recently tested in CRP based on multiple layers of chitosan, SB alginate beads in the inner layer, and alginate films [ 272 ]. The dependence of the release profiles on film thickness is represented in Figure 4 .…”

“… Release kinetic curves of sodium benzoate (SB) in water from both MULT-THIN (•) and MULT-THIK (◊) films, during the first stage of release [ 272 ]. …”