Short-range Order Structure Research Articles

Mechanism governing the rice glutelin fibrils on inhibition of in vitro wheat starch digestion

Our previous research found that rice glutelin fibril aggregates (RGFA) can mitigate in vitro starch digestion, while the mechanism is not well understood. Here the effects of RGFA on starch properties and activities of amylolytic enzymes were studied. The peak viscosity decreased significantly to 1041.0 ± 11.3 cP (mixture of 10 h fibril and starch) ( p < 0.05). The short-range structural order of starch (R-value, calculated from the intensity ratio of the bands at 1047 and 1022 cm −1 ) changed from 0.73 ± 0.02 (pure wheat starch) to 0.86 ± 0.01 (mixture of 2 h fibril and starch), and 0.58 ± 0.01 (mixture of 10 h fibril and starch) ( p < 0.05). The RGFA inhibited in vitro wheat starch digestion significantly ( p < 0.05). And RGFA also displayed strong inhibitory effects on amylolytic enzymes. The residual activities of α-amylase, glucosidase and double enzymes were only 61.0 ± 3.2, 63.1 ± 2.5, and 60.5 ± 0.1%, respectively in the presence of 2 h fibril. The results indicated that RGFA with distinctly different fibril structures had different inhibitory mechanisms on starch digestion. The study provides new strategies for application of food protein fibrils and production of foods with reduced starch digestion. • Rice glutelin fibril aggregates (RGFA) may inhibit starch from gelatinization. • h fibril displayed the highest inhibition effect on α-amylase activity. • RGFA with distinct structure had different inhibitory mechanism on starch digestion. • The study provides new strategies for application of food protein fibrils.

In situ study on medium-range order evolution during the polyamorphous phase transition in a Pd-Ni-P nanostructured glass

• Bulk-sized nanostructured glasses that exceed millimeters have been prepared. • Short-range order structure stably remains before and after laser evaporation. • Medium-range order dominates the polyamorphous phase transitions induced by P and T. • Multiscale structures and properties can be tailored based on polyamorphism engineering. Engineering multiscale structural hierarchies in glassy alloys enable a broad spectrum of potential applications. Metallic glasses were born in hierarchical structures from atomic-to-nanometer scales. However, the frozen-in structures in traditional metallic glasses prepared by rapid quenching techniques are challenging to tailor. Here, we show that a Pd 40 Ni 40 P 20 bulk nanostructured glass of polyamorphous interfacial structures was prepared by inert-gas condensation with a laser evaporation source, and its multiscale structures could be engineered. In-situ scattering experiment results reveal polyamorphous phase transitions occurred in the interfacial regions, which are accompanied by the evolution of medium-range order and the nanoscale heterogeneous structures during the condensation process of glassy nanoparticles under high pressure and the following heating process. Moreover, changes in the cluster connectivity resulting from repacking of the local ordering induced by pressure and temperature could be observed. The thermophysical and mechanical properties, including boson peaks, hardness, and elasticity modulus, could be changed as a function of heat-treatment parameters. Our findings would shed light on the synthesis of bulk nanostructured glassy alloys with tailorable thermodynamic and dynamical behavior as well as mechanical properties based on the understanding of metastability for polyamorphous interfacial phases.

Viscosity of liquid gallium: Neural network potential molecular dynamics and experimental study

Gallium traditionally comprises a difficult object for theoretical description due to its complex short-range order structure. In this paper, deep learning potential for liquid gallium was developed, which allowed to significantly increase spatiotemporal scale of molecular dynamics (MD) simulation with preserving ab initio accuracy. Such increasing of performance of MD simulations allowed to calculate temperature dependence of viscosity value for liquid Ga, for which there is a considerable ambiguity in the available literature data, especially in low temperature range. Since direct ab initio viscosity calculations are not possible, as they do not allow enough statistical data to be collected, we combine several theoretical approaches: ab initio MD, for the implementation of which we used the VASP program code; the method of artificial neural networks (ANN) to obtain an effective interatomic interaction potential (ANN potential) using the DeePMD program; a classical MD method (LAMMPS program code); and the recently proposed viscosity calculation approach – time-decomposition method, which uses averaging over a large number of trajectories obtained by the MD. Ab initio MD calculations for liquid gallium were conducted in a temperature range from 303 to 1400 K (500 atoms were used in a supercell and 10,000 of 1 fs steps were performed for each temperature). The obtained data for the surface of potential energy and forces acting on atoms were used as a training set for constructing the ANN potential, whose high quality is confirmed by its almost ideal reproduction of ab initio structure at the level of pair correlations. In turn, the ab initio radial distribution functions are close to the results of other works. Self-diffusion coefficient, calculated via MD with developed deep learning potential, coincides well with the theoretical and experimental results of other authors. Temperature dependence of the viscosity was also computed via MD with developed potential using 10 independent trajectories (4000 atoms and 200,000 fs each) for every temperature point. Calculated viscosity data is in a good agreement with literature data at high temperatures, however at low temperatures some literature data agrees with our computational result, while the others – not. To check the results of our simulation, we experimentally measured viscosity from the melting point to 1270 K using an original setup based on oscillating cup method. Obtained experimental results are in excellent agreement with the results of our simulations. Thus, since both methods (experimental and computational) are modern and independent, presented at this work temperature dependence of viscosity is probably the most reliable at this moment.

Theoretical study of the M7X6 type of vacancy ordered phases in nonstoichiometric hafnium and tantalum carbides

Carbides of IV and V group transitional metals with B1 structure contain large amounts of vacancies in the carbon sublattice. Ordering of the vacancies leads to formation of new phases with various stoichiometry. Ordered structures were discovered and studied for all the IV and V group transitional metal carbides except carbides of hafnium and tantalum. Nevertheless, recent theoretical works have predicted large variety of ordered structures in non-stoichiometric HfCy and TaCy including unusual Hf7C6 and Ta7C6. Such a stoichiometry is not typical for the ordered carbides. In this work, we study in detail the new M7X6 type of vacancy ordered structures using ab initio methods. For both compounds Hf7C6 and Ta7C6, we have found two B1-derived vacancy-ordered phases: trigonal (space group R3¯) and monoclinic (space group C2/m). The comparison of their formation enthalpies with the disordered B1 structure has showed that the only ordered phase Hf7C6 can be trigonal phase while in Ta7C6 both trigonal and monoclinic structures are possible. Using the predicted monoclinic superstructure, we explain some peculiarities of the neutron diffraction pattern of the annealed partially ordered samples of TaC0.83–0.85. The theoretical and experimental data on the short range structural order in superstructures is discussed. We also study the influence of the M7X6 type of ordered structure on mechanical properties. The highest Vickers hardness ∼27.1 GPa is expected for the trigonal ordered Hf7C6 phase.

Structural changes and components’ interactions alter the digestion property of in-kernel starch from thermally processed Tibetan Qingke

Thermal processing has been applied to the property modification of the pure Tibetan Qingke (TQ) starch, but few studies attempt to elucidate the changes in physicochemical properties of in-kernel starches under whole TQ kernels thermal processing. In this study, the molecular, structural, and digestive characteristics of SUTQ, SHTQ, SMTQ, and SBTQ (starches isolated from unprocessed, heat fluidized, microwave irradiated, and baked TQ, respectively) were measured to elucidate the effects of different thermal treatments on the in-kernel starch. After TQ thermal treatments, the amylose/amylopectin ratio increased to 0.71, 0.64, and 0.68 for SHTQ, SMTQ, and SBTQ, respectively, while the molecular weight of in-kernel starches decreased by 39.29 %–82.14 %. Furthermore, the damage degree of starch surface morphology ranked as: SHTQ > SBTQ > SMTQ. The entanglement action between protein network resulting from protein polymerization and gelatinized starch aggregations exhibited most obvious in SHTQ. Moreover, the increased fluorescence intensity, newly formed dark color rings, and disrupted Maltese cross were observed in SHTQ, SMTQ, and SBTQ, and their variation trends were consistent with the damage degree of starch surface morphology. SHTQ, SMTQ, and SBTQ showed the decreased relative crystallinity (1.79 %, 15.98 %, and 14.64 %), short-range order (0.64, 0.81, and 0.80), and double helix structures (0.48, 0.61, and 0.58) and increased degree of gelatinization (100 %, 38 %, and 45.51 %), which partially transformed slowly digested starch into rapidly digested starch. In particularly, the formation of more ordered structures (V-type crystalline and interaction between protein and starch) induced by heat fluidization treatment provided the greatest thermal stability and highest resistant starch content (42.1 %) for SHTQ. Heat fluidization was a promising thermal processing for the development of TQ or TQ starch-based functional foods.

Thermodynamic re-optimization of the AClx-MgCl2 (A=Na, K, Rb, Cs and Ca, x=1 or 2) systems

Thermodynamic evaluation of the AClx-MgCl2 (A = Na, K, Rb, Cs and Ca, x = 1 or 2) systems were carried out by the CALculation of PHAse Diagrams (CALPHAD) technique. Substitutional solution model (SSM) and associate solution model (ASM) were employed to describe the liquid phase. The eleven intermediate phases, i.e., Na2MgCl4, NaMgCl3, K2MgCl4, K3Mg2Cl7, KMgCl3, Rb2MgCl4, RbMgCl3, Cs3MgCl5, Cs2MgCl4, CsMgCl3 and CsMg3Cl7, were treated as stoichiometric compounds. The thermodynamic parameters for describing the AClx-MgCl2 (A = Na, K, Rb, Cs and Ca, x = 1 or 2) systems were optimized based on the available phase equilibria and thermochemistry data. A set of self-consistent thermodynamic parameters of these binary systems was obtained. The calculated phase equilibria, liquid mixing enthalpy and liquid activity are in good agreement with the experimental data. It indicates that the SSM and ASM are considered as effective models to describe the liquid phase with short-range ordering structure in the molten salt. This work not only enriches the thermodynamic database of the multicomponent molten salts, but also provides one more model choice for optimizing and designing the molten salt systems except modified quasi-chemical model.

Inhibiting the inverse Hall-Petch behavior in CoCuFeNiPd high-entropy alloys with short-range ordering and grain boundary segregation

The mechanical implications of short-range ordering (SRO) and grain boundary (GB) segregation in the inverse Hall-Petch behavior of nanocrystalline CoCuFeNiPd high-entropy alloys (HEAs) were studied using hybrid Monte Carlo (MC)/Molecular Dynamics (MD) simulations. Results show that the presences of SRO and GB segregation inhibit the grain size softening (inverse Hall-Petch relation), leading to grain-size independence of the high flow stress. We find that the dislocation nucleation at triple junctions is suppressed by the SRO due to the increased stacking fault energy, which attenuates the dislocation activities. Furthermore, the strain localization at GBs is intensified by the GB segregation due to the increased GB energy, which facilitates the GB activities and glass-like deformation. The GB-governed plasticity associated with glass-like deformation leads to suppression of the inverse Hall-Petch effect. These findings may provide useful strategies for the design of high-performance HEAs by tuning the GB composition and SRO structure.

The structure of the Zr-Cu-Al melts in the glass forming range of concentrations.

The short-range order structure of the Zr47,5Cu47,5Al5 and Zr40Cu40Al20 melts was investigated by the method of molecular dynamics simulations. Based on the obtained results, partial pair correlation functions and distributions of partial coordination numbers have been calculated. The main structure parameters determined from these functions were compared with similar parameters for amorphous alloys. According to the results of research, the presence of both homocoordinated and heterocoordinated clusters in the melts, which form a cluster solution, was established. The assumption of the presence of heterocoordinated icosahedral clusters is made.

A universal dimensionless length scale in medium range order amorphous structures

Our theoretical analysis reveals the existence of a previously unknown universality, namely, a dimensionless length scale, related to a ratio of medium and short range order structures of amorphous systems that originates from a conspiracy between dispersion forces among molecules and their phonon mediated coupling. The scale in turn gives rise to the structure lying underneath the low temperature universalities of many other properties e.g. specific heat, internal friction, boson peak characteristics, Meissner–Berret ratio etc.

Influence of Au2+ ions irradiation on the structure and wear resistance of amorphous MoS2 films

The former work proved that ion irradiation causes the amorphization of the crystalline MoS2 film and leads to the degradation of the lubricating performance. In this work, in order to investigate the influence of irradiation damage on the amorphous structure, MoS2 film with amorphous structure was prepared and ion (Au2+) irradiation experiment was performed with damage level up to 5 dpa. The results show that after irradiation, the short-range order structure in the amorphous MoS2 film is interrupted, and the degree of disorder of its internal atoms increases. With the increase of the irradiation fluence, although the hardness and elastic recovery of the film increases significantly, the wear lives of the film reduce by two third. Further friction interface analyses reveal that the irradiation damage MoS2 film formed less reordered transferred layer at counter face, which leads to the higher friction coefficient and the shorter wear life.

The role of TCP structures in glass formation of Ni50Ag50 alloys

A molecular dynamics simulation of rapid cooling at a cooling rate of 1011 K/s for Ni50Ag50 alloys was conducted. The rapid cooling process was analyzed by using the system energy, the pair distribution function, and the largest standard cluster analysis. It is found that with a crystallization-like energy curve the solidification of Ni50Ag50 alloy experiences a liquid-liquid and a liquid-solid transition (LLT and LST), finally result in an amorphous solid. In LLT stage the topologically close-packed (TCP) short-range order structures of both crystal (S666) and glass (S555) increase; whereas only glass medium-range order structures are formed. TCP-based long-range order (LRO) structures of glass do not increase until the beginning of the LST. Even in solid (T < Tg) the LRO parameter based on ICO structures fluctuates violently, while that based on TCP structures is quite stable. Therefore, TCP not only is the basic structural characteristics of disordered system but also reasonably represents the metastability of metallic glasses. These findings not only clarify the importance of LLT for the glass forming ability of alloys, but also fully demonstrate the effectiveness and necessity of TCP structures for describing the structure of amorphous systems.

Modified Tartary buckwheat (Fagopyrum tataricum Gaertn.) starch by gaseous ozone: Structural, physicochemical and in vitro digestible properties

The present study investigated the effects of gaseous ozone treatment on the structural, physicochemical and in vitro digestible properties of Tartary buckwheat starch (TBS). The results showed that gaseous ozone treatment increased the detectable carbonyl and carboxyl groups content, improved the amylose content, and decreased pH of TBS. The granule microstructures of native TBS and ozone-treated TBS (OTBS) were characterized by SEM, CLSM and small-angle X-ray scattering (SAXS), showing that OTBS exhibited a reduced granule smoothness and integrity, lessened coloration area of FITC fluorescent as well as decreased crystalline layer and increased amorphous region. FTIR and XRD results revealed that appropriate time of gaseous ozone treatment (2.5 and 7.5 min) enhanced short-range and long-range order structure due to the increased intermolecular oxidation cross-linking, whereas over treatment (15 and 20 min) caused degradation of the starch. With the increasing treatment time, apparent viscosity increased while breakdown viscosity, setback viscosity, swelling power and solubility decreased. OTBS exhibited a higher gelatinization enthalpy (ΔH) and a better viscoelasticity after gelation (6% OTBS gel, w/w). Additionally, OTBS-2.5 and OTBS-7.5 showed a decreased rapidly digested starch (RDS) content and increased resistant starch (RS) content, indicating that the digestible properties of two oxidized starches was decreased, which provide a feasible way to develop TBS as a new modified starch source.

Connecting short-range order for the liquid-solid transition of Al-Cu-Fe alloys

Liquid-solid transition processes have always been mysterious, especially those with the participation of quasicrystal (QC) structures, and are generally far less understood than the conventional solidification process. Here, the liquid structure variation of ternary QC-forming Al60Cu37Fe3 with crystal-forming Al50Cu40Fe10 alloy liquids was compared using synchrotron radiation based on high-energy X-ray diffraction (HE-XRD) and reverse Monte Carlo simulation (RMC). It was noted that the types of short-range order structures are almost the same in the Al60Cu37Fe3 and Al50Cu40Fe10 alloy liquids, while the former has more icosahedral short-range order (ISRO) and the latter has less. The medium-range order (MRO) was characterized by the cluster correlation method and visualization analysis. More obvious structural heterogeneity was found in the Al60Cu37Fe3 liquid, which is due to the strong correlation between clusters with high icosahedral order and the weak correlation between crystal clusters. Moreover, strongly correlated ISRO clusters can form icosahedral medium-range order (IMRO) structures by interpenetrating connections forming a stable structure upon cooling, and some other clusters can even enhance the IMRO stability. Such IMRO will be retained in the liquid upon cooling, leading to QC formation. All the findings provide a further understanding of the liquid-solid transition with ISRO participation.

Chemical short-range order strengthening mechanism in CoCrNi medium-entropy alloy under nanoindentation

The strengthening effect of chemical short-range order (SRO) structure in CoCrNi medium-entropy alloy (MEA) was investigated using molecular dynamics (MD) simulations of nanoindentation. The quantitative correlation between SRO parameters and mechanical properties was established. Results show that the strength and hardness of CoCrNi MEA increase with increasing chemical SRO parameters and reach a stable value with steady SRO structure. Compared with random solid solution (RSS) state model, the average hardness increases 8.1% in an intermediate SRO model and 13.7% in a stable SRO model. The dislocation nucleation force of SRO model is 55% larger than RSS model. Moreover, dislocation pinning induced by local Ni SRO structure, as well as the promoted unique dislocation interaction were observed during the nanoindentation process. Finally, results also show that as the temperature rises, the enhancement of hardness becomes more significant (11.4% at 70K, 17.24% at 300K, and 23.8% at 800K).

Structural and chemical modifications of oxides and OH generation by space weathering: Electron microscopic/spectroscopic study of hydrogen-ion-irradiated Al2O3

Minerals on airless bodies exhibit characteristic spectral features such as darkening and reddening. Such space weathering is mainly due to hydrogen-ion irradiation by the solar wind and to micrometeorite impacts. Because of the reactivity of hydrogen, the associated H-implantation into O-bearing minerals can lead to the formation of new chemical bonds and may contribute to formation of water. However, laboratory studies still conflict about production efficiency of water and relevant H-bearing molecules such as OH formed by the H-ion irradiation. The production efficiency of the molecules within minerals may be influenced by short-range structural order of the host minerals. It is thus important to clarify how the implanted H interacts with various irradiation defects produced by H-ion bombardment. Here, we investigated H-ion-irradiated alumina (Al2O3), one of the most basic oxides, using scanning/transmission electron microscopy (S/TEM) and electron energy-loss spectroscopy (EELS). The TEM images revealed dense dislocations, nanoscale voids and nanoscale cracks—instead of amorphization—in the region subject to high energy deposition. Our analyses by STEM–EELS hyperspectral imaging (HSI) isolated a few essential spectral components, suggesting that chemical interactions between the implanted H and the host alumina resulted in local generation of OH species rather than amorphization. We also found a spectral feature which may be explained by H2 gas, presumably remaining in the nanovoids, most of which escaped through fractures formed by the coalescence of the high-pressure H2 nanobubbles. Such fractures/crack surfaces can act as additional reactive sites for the formation of the OH species. The present results strongly imply that H+ irradiation can be a source of water in minerals in various astrophysical conditions. The present methodology can be applied to a wide range of extraterrestrial materials, such as regolith grains, interplanetary-dust particles, and/or presolar grains in primitive meteorites.

Electrochemical Behavior of Drawn Thin-Film Vitreous Lithium Metaphosphate

Lithium metaphosphate (LiPO3) thin-film glassy solid-state electrolyte (GSSE) ribbons with thicknesses varying from 35 to 800 μm have been drawn for the first time through softening and drawing of a cast and annealed preform of LiPO3 glass. The short-range order structure and composition of the thin-film glasses were confirmed to be identical to the bulk glass LiPO3 using Raman spectroscopy. Electrochemical impedance spectroscopy (EIS) was used to investigate the Li ionic conductivity of the thin-film GSSE samples and was essentially the same as that of the bulk LiPO3 glass. A model of area specific resistance (ASR) as a function of film thickness and temperature was generated and compared to resistances determined through equivalent circuit fitting of EIS generated Nyquist plots. The generated model compared well to the experimentally determined values. Symmetric cell cycling was conducted on the 50 μm thick samples to determine the cycling behavior and the durability of the electrolyte under applied voltage and sustained current. Evidence of the electrochemical stability of the LiPO3 thin-film GSSE against lithium metal was observed in the symmetric cell cycling as nearly perfectly flat and ohmic behavior cycling plateaus were found over a range of current densities. Prior to shorting, a critical current density of 65 μA/cm2 was obtained at 90 °C with a direct current (dc) Li ionic conductivity of 10–6.5 [Ω·cm]−1. While these current densities are low, this is the first report of a thin-film GSSE drawn into thicknesses of that required for high performance all-solid-state lithium batteries, and the proven stability and durability of this oxide GSSE is strong evidence that drawn thin-film GSSE materials, especially those with higher conductivities such as the well-studied sulfide glasses, are viable materials from which to create thin, easily processable solid-state electrolytes (SSEs) and warrant further research.

The impact of gliadin and glutenin on the formation and structure of starch-lipid complexes

This study evaluated the influence of the main gluten fractions (gliadin and glutenin) on the physicochemical properties of binary wheat starch-Lauric acid (WS-LA) complexes during heat processing to explore the complex structure and digestion of WS-LA in the presence of gluten. Ternary WS-LA-glutenin complexes were prepared at different pH (5.2 and 7), whereas WS-LA-gliadin was prepared using ethanol, and their physicochemical properties were analyzed. We found that the addition of glutenin displayed a sharper and higher diffraction peak than samples without protein, which increased short-range order structure (low full width at half-maximum (FWHM) of the band at 480 cm−1) and good thermal stability (melting peak appeared at a higher temperature); the opposite was shown for gliadin. Even though glutenin increased the resistant starch (RS) content than WS-LA, all samples prepared in 65% ethanol showed higher RS content than WS-LA-glutenin samples. These findings might improve our understanding of the relationship between gliadin/glutenin and binary complexes and provide a theoretical basis for preparing starch-based foods with a low glycemic index.

Synthesis, Short-Range Order Structure, and Thermal Properties of Mixed Oxy-sulfide Nitride (MOSN) Glasses.

Nitrogen doping has been shown to greatly improve the stability of solid electrolyte (SE) materials at the anode and cathode interfaces in all solid-state batteries (ASSBs) as widely demonstrated by the LiPON family of compositions. In an effort to expand the use of nitrogen in SEs, in this study, mixed oxy-sulfide nitride (MOSN) glasses were prepared by direct ammonolysis of the sodium oxy-sulfide phosphate Na4P2S7-xOx (NaPSO) glass series to understand the combined effects that oxygen and sulfur have on the incorporation of nitrogen. The short-range order (SRO) structures of the Na4P2S(7-x)-3/2yzOx-3/2y(1-z)Ny (NaPSON) glasses were investigated with Raman and infrared (IR) spectroscopies to understand the effect that nitrogen has in the glass structure. The N content of the glasses was quantified by elemental analysis and confirmed through weight change measurements. By combining this information, it was further possible to determine the anion exchange ratio, z, for the N substitution of O and S as a function of the base NaPSO glass chemistry, x. The composition-dependent glass transition temperature, Tg(x), measured with differential scanning calorimetry (DSC), was found to correlate well with the measured N/P ratio, y, in the NaPSON glasses.

Ring uniformity in amorphous photonic band gap materials

The existence of photonic band gap (PBG) in amorphous networks has been associated with structural short-range order and internal similarity. In this study we present amorphous networks that possess low degrees of orderness and similarity, yet still exhibit decent PBG forming ability. The robustness of PBG is found to be related to less-deviated ring distributions. We develop regional ring disorder to quantify variations of rings, revealing the complementary roles of regional ring uniformity and local similarity in PBG formation. The evolution of PBG with respect to structural deformation is also presented to elucidate the effect of regional characters on PBG formation. Our study brings new insights towards the understanding of PBG formation in amorphous structures, paving the way for novel design and manipulation of amorphous PBG materials.

Mechanical and antimicrobial properties of high amylose corn starch/konjac glucomannan composite film enhanced by cinnamaldehyde/β-cyclodextrin complex

In the present research, cinnamaldehyde/β-cyclodextrin (CIN/β-CD) complex (0.5 %–3.0 %, w/v) were added into the composite film of high amylose corn starch (HAS) and konjac glucomannan (KGM) and the structural, physicochemical and bacteriostatic properties of the films were investigated. The results showed that the presence of CIN/β-CD complex decreased the crystallinity and short-range order structure of high amylose corn starch/konjac glucomannan (HAS/KGM) composite film. The CIN/β-CD complex also enhanced the polymeric interaction between the two polysaccharides, which improved the thermal ability of the composite film. The scanning electron microscopy (SEM) images showed compact and even surface and cross-section structure of the composite films when the complex addition was lower, while displayed heterogeneous aggregations of CIN/β-CD complex in the film with some pores after excessive addition of the complex. The mechanical strength of the film increased significantly from 14.51 MPa to 23.88 MPa and the water vapor resistance was improved due to the changes in skeleton structure of the composite film. The composite films exhibited obvious inhibition activity to Staphylococcus aureus and Escherichia coli, which displayed a promising application in food active packaging.