Investigation on Sodium Benzoate Release from Poly(Butylene Adipate‐Co‐Terephthalate)/Organoclay/Sodium Benzoate Based Nanocomposite Film and Their Antimicrobial Activity

Abstract

Polymeric nanocomposites embedded with nontoxic antimicrobial agents have recently gained potential industrial significance, mainly for their applicability to preserve food quality and ensure safety. In this study, a poly(butylene adipate-co-terephthalate) (PBAT)/organoclay (CMMT) based nanocomposite film doped with sodium benzoate (SB) as antimicrobial agent was prepared by a solution mixing process. A homogenous dispersion of organoclay (cetyltrimethylammonium-modified montmorillonite [CMMT]) in PBAT matrix was observed by X-ray diffraction and transmission electron microscopy. PBAT/CMMT nanocomposite film showed higher barrier properties against water and methanol vapor compared to the PBAT film. The release of SB from PBAT and its nanocomposite film was measured and the relevant data were fitted to the Weibull model. The higher values of Weibull's shape factor and scale parameter as corroborated by experimental findings indicated faster rate of SB release from PBAT/CMMT/SB nanocomposite film, when compared to the pristine PBAT film. Bacterial inhibition studies were accomplished against 2 food pathogenic bacteria, Bacillus subtilis and Staphylococcus aureus, by determining the zone of inhibition and corresponding growth profiles. Both bacterial inhibition studies and growth profiles established that PBAT/CMMT/SB demonstrated better antimicrobial activity than PBAT/SB film. Therefore, PBAT/CMMT/SB nanocomposite film can be used for food packaging application as it showed good barrier properties and antimicrobial activity against food pathogenic bacteria.

Curcumin Incorporated Poly(Butylene Adipate-co-Terephthalate) Film with Improved Water Vapor Barrier and Antioxidant Properties

“…Polyesters such as PBAT (poly(butylene adipate-co-terephthalate)), PLA (poly(lactide)), and PHA (poly(hydroxy alkanoates)) are of great interest due to their biodegradability and hydrolysis of ester bonds to non-toxic substances [ 11 , 12 ]. Among these polyesters, PBAT is considered one of the most likely biodegradable polymers for food packaging film applications [ 13 , 14 , 15 ]. PBAT is an aliphatic, aromatic polyester, mainly obtained from 1,4-butanediol, adipic acid, and terephthalic acid.…”

Development of active poly(butylene adipate‐co‐terephthalate) films incorporated with sodium benzoate and its application in white mushroom ( Agaricus bisporus ) packaging

“…The SB in the PBAT film would be released to the inner surface of the film to play an antimicrobial role in inhibiting the growth of microorganisms in mushrooms. In addition, research showed that the PBAT film containing montmorillonite and SB had a good inhibitory effect on Bacillus subtilis and Staphylococcus aureus (Mondal et al, 2015). It was also confirmed that polysaccharide blend films containing SB had good antibacterial properties (Wenfeng, 2009;Zhang et al, 2015).…”

Preparation and Characterization of Extruded Pbat/Organoclay Films

“…PHB (Poly (3-hydroxybutyric acid), Ecoflex ™ (synthetic biodegradable polyester copolymer) and Ecobras ™ (Ecoflex blend with thermoplastic starch) are examples of 100% biodegradable systems classified as biopolymer (PHB), synthetic polymer (Ecoflex) or polymer blends (EcobrasTM). These three materials completely degrade, in a short time, by microbial attack (fungi, bacteria and enzymes) under appropriate conditions in the environment [2]. However, these three materials have the same problem: they tend to degrade during processing, compromising their mechanical properties and, consequently, their applications [3] .…”