Gelatin/montmorillonite hybrid nanocomposite. I. Preparation and properties

Abstract

Gelatin/montmorillonite (MMT) hybrid nanocomposite was directly prepared with unmodified MMT and gelatin aqueous solution. Thermal and mechanical properties of the composite were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and tensile tests. The results indicated that an intercalated or partially exfoliated nanocomposite could be achieved, and the properties of the composite were significantly improved. A T g peak of high temperature disappeared in the DSC curve of the composite, and the thermogravity and thermally decomposed rate decreased obviously. The tensile strength and Young's modulus were also improved notably, which varied with MMT content, as well as the pH of gelatin matrix. Meanwhile, SEM photographs showed a plasticizing trend of gelatin fracture surface due to intercalation with MMT. Furthermore, the wet mechanical behavior was initially studied.

Development and Optimisation of Cassava Starch-Zinc-Nanocomposite Film for Potential Application in Food Packaging

“…The degradation temperatures of the films agree with the findings of Zhong and Li [15] and Sanyang et al [32] who reported the degradation temperature of glycerol-rich phase of kudzu starch-based edible films and biodegradable films based on sugar palm starch between 150°C to 280°C and 120°C to 290°C, respectively. Further heating beyond 260°C induced the highest thermal degradation rate which is reflected by the sharp weight reduction of the films.…”

“…The thermal, mechanical and barrier properties of nanocomposite materials, which determined their suitability for packaging application, have been studied [6,[11][12][13][14][15][16]. Zeng et al [11], Taghizadeh and Sabouri [12] reported that the platelet nature of the nanoparticles usually hinders the diffusion of gases and specifically contributes to the improvement of their thermal and mechanical properties.…”

“…Also, Huang and Yu [13] noted that introducing inorganic particles improved the thermal stability and mechanical resistance of starch-montmorilonite nanocomposite. The addition of chitosan in starch biofilms increased the thermal stability and ultraviolet absorption of the films [14][15][16]. Azeredo et al [6], who carried out a study on the nanocomposite edible films from mango puree reinforced with cellulose nanofibre, revealed that the addition of the cellulose nanofibre significantly improved the thermal and mechanical properties of the films.…”

Properties and characteristics of nanocomposite films from tilapia skin gelatin incorporated with ethanolic extract from coconut husk

“…As a result, films became stiffer and more compact, thereby improving thermal stability (Hoque et al 2011;Wu et al 2014). The increased thermal stability of nanocomposite films might be due to the thermal resistance of Cloisite Na + and the nanodispersion of montmorillonite sheets in the polymer matrix (Zheng et al 2002). Martucci and Ruseckaite (2010a) reported the increased thermal stabilisation of gelatin nanocomposite films.…”

Preparation and Barrier Properties of Chitosan‐Layered Silicate Nanocomposite Films

“…By fitting permeation data to various phenomenological models, the aspect ratio can be estimated. [8][9][10] The aim of this study was to investigate the influence of relative humidity on the water vapor permeability of chitosan and the effect of nanofiller content on the water vapor and oxygen permeabilities of the chitosan nanocomposite films. Furthermore, the experimental permeability data was fitted to various permeability models.…”