Effect of in situ apatite on performance of collagen fiber film for food packaging applications

Abstract

This study attempted to prepare apatite in situ in acid‐swollen cowhide collagen film by an ammonia gas fumigating method and assess its reinforcement effect on a collagen fiber film for food packaging applications. The X‐ray diffraction and Fourier transform infrared spectroscopy results confirmed the successful synthesis of apatite in collagen fiber films. SEM images showed that tiny apatite particles appeared as a coating on the film surface and also made the film's inner structure more compact and less porous than pure collagen fiber film. Apatite significantly (p < 0.05) increased the tensile strength and improved the water vapor barrier and water insolubility properties of collagen fiber film. Moreover, the thermogravimetric and differential scanning calorimetry results confirmed that the thermal stability of collagen was improved with the increasing apatite. The in situ–synthesized apatite provided a practical reinforcement approach to improving the collagen fiber film's performance and benefited its application as a food packaging material. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44154.

Influence of natamycin loading on the performance of transglutaminase‐induced crosslinked gelatin composite films

“…d). This increase might be attributed to the effect of the change in natamycin: the peak shape approximated the shape of the natamycin‐gelatin film, and this change is associated with the crystalline domains of natamycin (Wang et al ., ,b), as seen in XRD analysis. Moreover, a high crystallinity can have a positive influence on the improvement of thermal stability (Lu et al ., ), which would be a reason why natamycin‐ gelatin has a higher Tp of 430.93 °C.…”

“…Based on preliminary experiments and a previous paper (Wang et al ., ,b), gelatin, glycerol and distilled water (5:1:100 in weight) were mixed. Natamycin with concentrations of 0, 0.25, 0.50, 0.75 and 1.00 g natamycin g gelatin −1 was added to the film‐forming solutions.…”

Effects of treatment of dielectric barrier discharge cold plasma (DBD‐CP) on mechanical, barrier and functional characteristics of casein‐based films

“…The water vapour permeability (WVP) values of the film samples made from casein solutions treated with DBD‐CP were measured according to the literature (Wang et al ., 2016). The film samples were cut into appropriate sizes and adhered to the cups ( d = 2 cm) that were loaded with 3.0 g dried calcium chloride.…”

Improved structure‐stability and packaging characters of crosslinked collagen fiber‐based film with casein, keratin and SPI

“…Next, CN, KRT or SPI solutions were introduced into the CColF slurry with a concentration of 100 or 500 g kg −1 in dried weight of CColF, respectively. The solutions were cast into films according to the method reported previously . These films were stored in a humidistat at 51% relative humidity (RH) for 7 days before evaluating film properties.…”