title: 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.
authors: Dept. of Polymer Science and Technology, Univ. of Calcutta, 92 A. P. C. Road, Kolkata, 700 009, West Bengal, India.
authors: Dibyendu
authors: D
authors: Mondal
authors: Biplab
authors: B
authors: Bhowmick
authors: Dipanwita
authors: D
authors: Maity
authors: Md Masud R
authors: MM
authors: Mollick
authors: Dipak
authors: D
authors: Rana
authors: Vivek
authors: V
authors: Rangarajan
authors: Ramkrishna
authors: R
authors: Sen
authors: Dipankar
authors: D
authors: Chattopadhyay
mesh_terms: D000272:Adipates / Q000737:chemistry; D000475:Alkenes / Q000737:chemistry; D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000494:pharmacology*; D001412:Bacillus subtilis / Q000187:drug effects / Q000254:growth & development; D001546:Bentonite / Q000737:chemistry*; D005516:Food Microbiology; D018857:Food Packaging / Q000379:methods*; D006094:Gram-Positive Bacteria / Q000187:drug effects* / Q000254:growth & development; D006801:Humans; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry; D011091:Polyesters / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D020160:Sodium Benzoate / Q000737:chemistry / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects / Q000254:growth & development; D013718:Tensile Strength; D014867:Water; D014961:X-Ray Diffraction
chemical_list: D000272:Adipates; D000475:Alkenes; D000900:Anti-Bacterial Agents; D010795:Phthalic Acids; D011091:Polyesters; D011108:Polymers; C488797:poly(butylene adipate-co-butylene terephthalate); D014867:Water; D001546:Bentonite; C558934:butylene; C029900:adipic acid; D020160:Sodium Benzoate
keywords: antimicrobial activity; nanocomposite films; organoclay; poly(butylene adipate-co-terephthalate); sodium benzoate release kinetics