Premium
Sea Squirt Shell Protein and Polylactic Acid Laminated Films Containing Cinnamon Bark Essential Oil
Author(s) -
Beak Songee,
Kim Hyeri,
Song Kyung Bin
Publication year - 2018
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.14207
Subject(s) - polylactic acid , ultimate tensile strength , solubility , materials science , biodegradable polymer , composite material , chemical engineering , chemistry , polymer , organic chemistry , engineering
Sea squirt ( Halocynthia roretzi ) shell protein (SSP) was used as a biodegradable film material and laminated with polylactic acid (PLA) to improve its physical and water barrier properties. Cinnamon bark oil (CBO) was incorporated into the SSP film as a bioactive material. After laminating with PLA, the tensile strength and elongation at break of the SSP film increased from 4.07 to 9.09 MPa and from 8.68 to 138.84%, respectively. In addition, water vapor permeability and water solubility decreased from 5.62 to 0.91 × 10 −9 g m/m 2 s Pa and from 42.17% to 23.93%, respectively. DSC results of the SSP films indicate that melting point temperature increased 140.05 to 163.52 °C by laminating PLA. The addition of 0.5%, 0.7%, and 1.0% CBO conferred the antimicrobial activity against four pathogenic bacteria to the SSP/PLA‐laminated films. The SSP/PLA‐laminated films containing CBO also had antioxidant activities. Therefore, the SSP/PLA‐laminated films containing CBO are applicable as biodegradable packaging films. Practical Application Sea squirt shell has been discarded after the consumption of sea squirt, and sea squirt shell protein can be a base material for biodegradable films. In this study, sea squirt shell protein and polylactic acid laminated films containing cinnamon bark essential oil were developed. The developed films are promising environmentally‐friendly alternatives for active packaging material.