Field Of Packaging Research Articles

Methods for Fabrication of Freestanding Nanocellulose Film as a Sustainable Material for Packaging and Biomedical Applications: A Review

Biopolymers are a sustainable alternative to traditional plastics in the medical and packaging fields. Biopolymers are biodegradable and can be used to reduce plastic pollution. They are derived from renewable resources like cornstarch, sugarcane, or cellulose. Cellulose nanomaterials have the potential to revolutionize various industries. However, the production process of nanocellulose films is time-consuming, and there is a need for quick and adaptable methods to fabricate these films. Techniques such as solvent casting, spin coating, roll-to-roll printing, layer-by-layer assembly, vacuum filtration, and spraying are used to fabricate free-standing nanocellulose films, each with its advantages and limitations. The spraying process shows promise in producing nanocellulose films quickly and efficiently. In addition to that, the need for free-standing nanocellulose films in medical packaging and tissue engineering areas was admirable. However, the rapid process for fabrication of the film should be developed for large-scale production and commercialization of films.

Investigation on Catalytic Cracking Performance of Metal Catalysts for 1,1,2‐TCE

AbstractPVDC played an irreplaceable role in the field of sealed packaging, and its polymer monomer, VDC, was in short supply. At present, the saponification of 1,1,2‐TCE and sodium hydroxide was used to generate VDC in industry, which was a process with great environmental pollution. Catalytic dehydrochlorination of 1,1,2‐TCE to produce VDC was a green process route, but the selection of catalysts had always been controversial. This study aimed to screen catalysts suitable for industrial applications. The cesium based catalysts with good catalytic performance were systematically characterized and evaluated, and the overall reaction process was calculated using DFT calculation. The experimental results indicated that the cesium chloride catalyst with a 3 % molar fraction had the best catalytic performance, achieving 55.27 % conversion of 1,1,2‐TCE and 76.85 % selectivity for VDC, respectively. The reaction paths and transition state of several catalysts were calculated by DFT method. It was revealed that the activation energy required for the reaction of CsCl catalyst was the lowest, at 130.61 kcal/mol, and the energy of the product VDC was the lowest, at −63.25 kcal/mol, making it the most stable. The calculation results were consistent with the experimental data, indicating that cesium chloride catalyst had the best reaction performance. Therefore, the subsequent research could focus on the method of improving the supported dispersity of cesium chloride catalyst and the development of core‐shell catalyst to lay the foundation for further industrialization.

Research on Silicon Carbide Dispersion-Reinforced Hypereutectic Aluminum-Silicon Electronic Packaging Materials

The objective of this study is to improve the mechanical properties and machining performance of high thermalconductivity and low expansion silicon carbide dispersion-strengthened hypereutectic aluminum-silicon electronic packaging materials to meet the needs of aviation, aerospace, and electronic packaging fields. We used the powder metallurgy method and high-temperature hot pressing technology to prepare SiC/Al-Si composite materials with different SiC contents (5vol%, 10vol%, 15vol%, and 20vol%). The results showed that as the SiC content increased, the tensile strength of the composite material first increased and then decreased. The tensile strength was the highest when the SiC content was 15%; the sintering temperature significantly affected the composite material’s structural density and mechanical properties. Findings indicated 700 ℃ was the optimal sintering and the optimal SiC content of SiC/Al-Si composite materials was between 10% and 15%. Besides, the sintering temperature should be strictly controlled to improve the material’s structural density and mechanical properties.

Highly flexible carbon nitride-polyethylene glycol-cellulose acetate film with photocatalytic antibacterial activity for fruit preservation

Cellulose acetate film, as a biodegradable and biomass-derived material, has great potential applications in food packaging. However, the poor mechanical and antibacterial properties limit its applications. Herein, a highly flexible carbon nitride-polyethylene glycol-cellulose acetate (CN-PEG-CA) film was successfully prepared by combining graphitic carbon nitride (g-C3N4) photocatalyst with cellulose acetate (CA). The g-C3N4 enables the film with antibacterial activity, as a green photocatalyst. PEG softens the rigid polymer CA and crosslinks CA, PEG, and g-C3N4 together by hydrogen bonding, as a flexible crosslinker. X-ray diffractometer (XRD), scanning electron microscope (SEM), and Fourier transform infrared spectrum (FT-IR) characterizations confirmed the successful preparation of the CN-PEG-CA film. The mechanical property tests demonstrated that adding PEG increased the elongation at break of the film by about 4 times. The composite film had high antibacterial activity, and the bactericidal rates on Escherichia coli and Staphylococcus aureus were 99.98 % and 99.89 %, respectively. It effectively extended the shelf life of strawberries to 96 h and effectively maintained the quality of strawberries during storage. After 96 h, the weight loss rate of strawberries packaged with 15 % CN-PEG-CA film was 21.83 %, vitamin C content was 45.47 %, titratable acidity content was 0.89 %, and color, hardness and total soluble solids were well maintained. And biocompatibility test results showed that the film was safe and nontoxic. From the ecological and economic point of view, the highly flexible and biodegradable films with efficient photocatalytic antibacterial activity synthesized in this paper have great potential in the field of food packaging.

Lactobacillus bulgaricus-loaded and chia mucilage-rich gum arabic/pullulan nanofiber film: An effective antibacterial film for the preservation of fresh beef

In recent years, the development of probiotic film by incorporating probiotics into edible polymers has attracted significant research attention in the field of active packaging. However, the influence of the external environment substantially reduces the vitality of probiotics, limiting their application. Therefore, to improve the probiotic activity, this study devised a novel nanofiber film incorporating chia mucilage protection solution (CPS), gum arabic (GA), pullulan (PUL), and Lactobacillus bulgaricus (LB). SEM images indicated the successful preparation of the nanofiber film incorporating LB. CPS incorporation significantly improved the survival ability of LB, with a live cell count reaching 7.62 log CFU/g after 28 days of storage at 4 °C — an increase of 1 log CFU/g compared to the fiber film without CPS. The results showed that the fiber film containing LB inhibited Escherichia coli and Staphylococcus aureus. Finally, the novel probiotic nanofiber film was applied to beef. The results showed that the shelf life of the beef during the experiments was extended for 2 days at 4 °C. Therefore, the novel probiotic film containing LB was suitable for meat preservation.

Importance of Packaging in Supply Chain Management

Establishment of efficient linkages and making a strong and transparent supply chain is the essence of modern day manufacturing. The inventory costs and transportation costs constitute a large proportion of the overall costs. In a competitive world efficiency of manufacturing would be to reduce the cost of manufacturing to increase profit rather than increase selling price to increase the profit. It is true that customer would be displeased with a product in case it is damaged or tampered. So for reduced inventory, transportation cost and safety and security of the product transported packaging is an important aspect. With the emphasis on Green supply chain efforts are being made to reduce the dependency on packaging materials, more so an effort to go in for reusable packaging materials. The proposed research work has the aim of analyzing the importance of packaging in supply chain management. Review of literature indicates that the aspect of packaging is crucial in the field of supply chain management. Studies carried out on the financial aspects of supply chain management have brought out factors such as lack of attention given to packaging of products. A descriptive research methodology is adopted. In the past such a correlation has not been attempted realistically, thus it was found that a study would be enriching, useful and interesting. The findings will give an insight on to the relevance of practicable methods to undertake innovation in the field of packaging not only at the industry level but also at global operations level and may serve as input in improving profitability, ensuring efficiency in business methods and support further research on the subject.

Synthesis and characterization of hydroxy propyl methyl Cellulose/Copper nanobiocomposites for antibacterial and antioxidant smart materials

The synthesis of hydroxy propyl methyl cellulose (HPMC)/copper nanobiocomposites adopting a microwave treatment. In this study, HPMC and copper nitrate at various concentration were mixed and subjected to varying microwave treatment times (10, 20, 30, 40, 50 and 60 s). UV–Vis spectroscopy was employed to analyse the physicochemical characteristics of HPMC/copper nanobiocomposites, with a maximal absorbance at 380 nm, indicating the formation of copper nanoparticles within the HPMC matrix. The interaction between copper nanoparticles and HPMC was further confirmed through FT-IR analysis. The SEM analysis displayed microporous structures ranging from 5 to 14 µm in diameter, with an average pore size of 7.0 ± 2.0 nm. The compositional analysis was done with EDS mapping. TEM analysis revealed spherical shaped copper nanoparticles with an average particle size about 2.5 nm in HPMC matrix. Remarkably, these nanobiocomposites exhibited a broad-spectrum antibacterial activity, displaying minimal inhibitory concentrations against both Gram-negative and Gram-positive bacterium. Significantly, the assessment of antibacterial activity in HPMC/copper nanobiocomposites demonstrated their efficacy against both Escherichia coli and Staphylococcus aureus. In addition to the antioxidant property, the antibacterial properties holds significant implications for their potential applications of HPMC/ copper nanobiocomposites in the fields of food packaging and biomedicine.

Preparation of a novel bio‐based aerogel with excellent hydrophobic flame‐retardancy and high thermal insulation performance

AbstractSodium‐alginate‐based aerogels possess wide prospects in the fields of packaging, aerospace, industrial construction and transportation because of their environmental compatibility and thermal insulation, but it is still a challenge to obtain a sodium alginate‐based aerogel with high flame retardancy and good thermal insulation. Herein, a sodium‐alginate‐based aerogel with high flame retardancy, thermal insulation and good hydrophobic properties was prepared by two‐step crosslinking strategy of phytic acid and metal ions and liquid phase deposition of trans‐cinnamic acid. As a result, the prepared SA/PA Mn+ aerogels obtained excellent flame retardancy (UL‐94 V‐0, LOI 50.1%) and rapid self‐extinguishing, and SA/PA Mn+ aerogels obtained good hydrophobic ability (CA = 134.2°). In addition, the mechanical properties of SA/PA Mn+ aerogels have also been improved, the compressive modulus increased from 0.66 to 6.37 MPa, and the specific modulus increased from 15.7 to 140.2 MPa cm −3 g−1. This research broadens the application of bio‐based flame‐retardant aerogels in the fields of packaging, aerospace, industrial construction and transportation.

Delivery of Probiotics with Cellulose-Based Films and Their Food Applications.

Probiotics have attracted great interest from many researchers due to their beneficial effects. Encapsulation of probiotics into biopolymer matrices has led to the development of active food packaging materials as an alternative to traditional ones for controlling food-borne microorganisms, extending food shelf life, improving food safety, and achieving health-promoting effects. The challenges of low survival rates during processing, storage, and delivery to the gut and low intestinal colonization, storage stability, and controllability have greatly limited the use of probiotics in practical food-preservation applications. The encapsulation of probiotics with a protective matrix can increase their resistance to a harsh environment and improve their survival rates, making probiotics appropriate in the food packaging field. Cellulose has attracted extensive attention in food packaging due to its excellent biocompatibility, biodegradability, environmental friendliness, renewability, and excellent mechanical strength. In this review, we provide a brief overview of the main types of cellulose used for probiotic encapsulation, as well as the current advances in different probiotic encapsulating strategies with cellulose, grafted cellulose, and cellulose-derived materials, including electrospinning, cross-linking, in-situ growth, casting strategies, and their combinations. The effect of cellulose encapsulation on the survival rate of probiotics and the patented encapsulated probiotics are also introduced. In addition, applications of cellulose-encapsulated probiotics in the food industry are also briefly discussed. Finally, the future trends toward developing encapsulated probiotics with improved health benefits and advanced features with cellulose-based materials are discussed.

Flexible cellulose nanofibers/MXene composite films for UV-shielding packaging

Cellulose nanofibers (CNF) based films are promising packaging materials, but the lack of special functions (especially UV-shielding property) usually restrict their further applications. In this work, MXene was incorporated into the CNF film by a direct solvent volatilization induced film forming method to study its UV-shielding property for the first time, which avoided the using of a vacuum filtration equipment. The composite films containing glycerin could be folded repeatedly without breaking, showing good flexibility. The structure and properties of MXene/CNF composite films (CMF) were characterized systematically. The results showed that MXene distributed uniformly in the CNF film matrix and there was strong hydrogen bonding interaction between CNF and MXene. The tensile strength and Young's modulus of the composite films could reach 117.5 MPa and 2.23 GPa, which was 54.1 % and 59.2 % higher than those of pure CNF film, respectively. With the increase of MXene content, both the UVA and UVB shielding percentages increased significantly from 17.2 % and 25.5 % to 100.0 %, showing excellent UV-shielding property. Moreover, CMF exhibited a low oxygen permeability (OP) value of 0.39 cc μm d−1 m−2 kPa−1, a low water vapor permeability (WVP) value of 5.13 × 10−11 g−1s−1Pa−1 and a high antibacterial rate against E. coli (94.1 % at 24 h), showing potential application in the packaging field.

Design and performance analysis of a flexible-hinged piezoelectric driving dispenser

Piezo-driven dispensers are precision dispensing devices for trace amounts of fluid and are widely used in the microelectronics packaging field. However, the preloading mechanism of piezo-driven dispensers easily loosens in high-frequency operation, and the design accuracy of the transmission ratio of the flexible displacement transmission mechanism (DTM) requires improvement. To address the aforementioned problems, we designed a self-locking preloading mechanism with an adjustable preloading amount for piezo-driven flexible transmission dispensers and investigated the method of designing the transmission ratio considering the non-expected directional deformation (parasitic deformation). First, the principle of the preloading mechanism was analyzed, and a method for adjusting the droplet diameter based on the preloading amount was proposed. Second, an asymmetric flexible-hinge compliance matrix calculation method was proposed, a transmission ratio model of the DTM was established, and the influence law of the structural parameters on the transmission ratio was comparatively analyzed using ANSYS software. Based on the output displacement requirement, transmission ratios were designed and structural parameters were determined. Finally, based on the piezoelectric coupling simulation, a piezo-driven dispenser was manufactured, and a test platform was built to conduct the relevant tests. The simulation and test results demonstrated that the maximum relative errors of the transmission-ratio calculated by the proposed transmission-ratio model were 1.54% and 3.6%, respectively, compared to the simulation and test results, confirming that the model was correct. Single-factor tests confirmed that a preloading mechanism can fix and preload the piezostack and that the droplet diameters can be adjusted with the preloading amounts. The operating frequency was up to 800 Hz with a diameter of 0.30 mm and a consistency of 4.32%, which meet the requirements of dispensing efficiency in the microelectronics packaging field. This study has practical significance for enhancing the transmission ratio design accuracy and dispensing performance of dispensers.

Application of thiourea polyurethane foam/zinc oxide nanocomposite for anticancer effects and antimicrobial potential

There is a continuous need to fabricate new antimicrobial agents due to the continuous development of microbial drug resistance. Recently, zinc oxide nanoparticles (ZnONPs) have emerged as a promising choice for developing new drugs owing to their exceptional broad-spectrum antimicrobial and anticancer action. In the current work, thiourea polyurethane foam/zinc oxide nanocomposite was synthesized by coupling ZnONPs and thiourea polyurethane foam (TPUF) to test its antimicrobial and anticancer activities. Ultraviolet–visible spectra, Fourier transform infrared, X-ray diffraction (XRD), zeta potential and dynamic light scattering analyses were investigated to study the characterization of thiourea polyurethane foam/zinc oxide nanocomposite (TPUF/ZnO). The synthesized TPUF/ZnO was examined as an antimicrobial agent against gram-positive bacterium (Bacillus cereus), gram-negative bacterium (Escherichia coli), and fungus (Aspergillus niger). The results of the agar well-diffusion test showed good inhibition zones against E. coli (16 mm), B. cereus (13 mm), and A. niger (26 mm). The minimum inhibition concentration (MIC) values of TPUF/ZnO against B. cereus and E. coli were 350 μg/mL and 400 μg/mL. TEM of TPUF/ZnO-treated B. cereus and E. coli bacteria displayed different ultrastructural modifications such as separation of the plasma membrane from the cell wall and vacuole formation that led to a complete lysis and bacterial death. The anticancer activity of TPUF/ZnO was also evaluated against liver and breast cancer cell lines (HepG-2 and MCF-7). TPUF/ZnO showed good cytotoxicity activities against HepG-2, and MCF-7, with IC50 values of 77.08 ± 1.36 and 109.01 ± 3.98 µg/ml, respectively. Thus, TPUF/ZnO could be a promising raw material in the field of food packaging and provide a possible anticancer compound for hepatocellular carcinoma and breast carcinoma.Graphic abstract

Thermally conductive h-BN/EP composites oriented by AC electric field induction

The excellent electrical insulation properties and mechanical properties of epoxy resin (EP) have led to its rapid development in the field of microelectronic packaging. However, the poor thermal conductivity of epoxy resins (thermal conductivity of only 0.14 W/(m·K)) limits the development of components for high power. Adding h-BN to epoxy resin to prepare composites can effectively improve the thermal conductivity of epoxy resin. In this paper, h-BN/EP high thermal conductivity composites were prepared by means of AC electric field induction with the goal of making the composites low loading and high thermal conductivity (loading of 10 wt%). It was shown that the h-BN/EP composite had the highest thermal conductivity of 0.310 W/(m·K) when applied to an AC electric field of 120 V/mm and 50 Hz for 1 h. It was 2.214 times higher than that of EP and 1.325 times higher than that of the same-loaded h-BN/EP composite (0.234 W/(m·K)). A thermal conductivity model that can predict the thermal conductivity of composites prepared using the same type of method is also developed, which extends the applicability of the thermal conductivity model. The prepared composites have good thermal management capability. The method is easy to be engineered and has great potential for use in electronic packaging and even other high thermal conductivity applications.

Synthesis and characterization of organosilicon functionalized water-based polyvinylidene chloride emulsion with core-shell structure

The outstanding barrier performance of polyvinylidene chloride (PVDC) has attracted widespread attention. In this work, a series of organosilicon functionalized water-based PVDC emulsions with core-shell structure are synthesized by seed emulsion polymerization using vinylidene chloride (VDC), methyl acrylate (MA), isooctyl acrylate (EHA) as core and vinylidene chloride (VDC), methyl acrylate (MA) as shell. Vinyl-terminated polydimethylsiloxanes (VT-PDMS) are introduced into the core-shell as modifier. The properties of PVDC emulsions and films modified with VT-PDMS are investigated. On the one hand, when VT-PDMS is properly incorporated into the core-shell particles, the Si-O bonds in VT-PDMS are dissociated, which further forms a cross-networking structure, thereby enhances the adhesion of PVDC film to the substrate. The barrier performance of the film is also improved by a small amount of cross network structure. On the other hand, the addition of VT-PDMS leads to the phenomenon of thin film shrinkage, which further enhances the barrier performance of PVDC. All results indicate that the best comprehensive performance is achieved when the VT-PDMS content in the PVDC core is 2 wt%, the adhesion can be increased to 0.527 MPa, the oxygen transmittance is 5.68 cc/m2·24 hr, and the actual time of water barrier after coating starch-based tableware is over 12 hours. This provides an effective line of thinking for the further application of PVDC barrier film in the field of environmental protection food packaging.

Preparation and negative thermal expansion in medium-entropy ceramics (Zr1/3Hf1/3Ti1/3)V2O7

The negative thermal expansion material ZrV2O7 exhibits superior performance and holds significant potential for applications. In this study, the medium entropy concept was employed to successfully synthesize (Zr1/3Hf1/3Ti1/3)V2O7, with metal atoms (Ti, Zr, and Hf) occupying the position of Zr in ZrV2O7. The material shows a negative thermal expansion coefficient of 4.2 × 10-6K-1, which is essentially consistent with the crystal structure and expansion performance of ZrV2O7. However, (Zr1/3Hf1/3Ti1/3)V2O7 demonstrates higher softening temperature and thermal stability. This study simplified the complex preparation process of the material, broadening its negative thermal expansion range and enhancing its high-temperature stability. Furthermore, the material possesses a significant dielectric constant of 2.24 × 108 (log f <1) and a high hardness of 187.7 HV0.5, making it a new type of dielectric ceramic material. It has great potential for applications in the fields of energy storage and electronic packaging.

The Influence of Internal Communication in the Organization on PT Wahyu Abadi (CIKARANG) Employee Performance

PT Wahyu Abadi is a company operating in the manufacturing industry specializing in printing and packaging. The company seeks to push the printing and packaging industry to new levels of innovation. This company provides business solutions in the fields of printing, packaging, digital and supply chain. PT Wahyu Abadi was chosen as the research location, which is located on Jl. Angsana Raya Blok L1 No 17, Delta Silicon 1 Industrial Area, Lippo Cikarang Bekasi, Indonesia. The analysis carried out using SPSS 21.0 found that the value of the influence of Internal Communication (X) on Employee Performance (Y) can be narrated using the regression formula Y= a+bX, so the regression value resulting from the calculation above is Y = 55.517 + 0.151X. The constant value (a) is = 55.517 while the coefficient value (b) = 0.151. The meaning of this equation is that if there is no internal communication, the employee's performance will be worth 55,517 units. However, if there is an increase of one unit/unit of the internal communication variable, it will be affected by an increase in employee performance by 0.515. Thus the t table: if the error level α = 5% (0.05%) and the two-sided test df = n – 2 (33 – 2 = 31), then the t table value is 2.040 and based on the calculation above the t count is obtained equal to 0.742 &lt; t table 2.040, then it can be concluded that H_0 is accepted and H_a is rejected because the calculated t is smaller than the t table. Thus it can be concluded that internal communication variables do not influence employee performance variables at PT Wahyu Abadi

Study on thermal conductivity of micron BN-nano SiO2 combined modified epoxy resin composites

Epoxy resin has attracted widespread attention in the field of power electronic packaging due to its favorable processing technology, high adhesion, and excellent dielectric properties. The enhancement of thermal conductivity in epoxy resin through the incorporation of diverse particles is a prominent area of interest in the realm of modified insulation materials. In this study, hexagonal boron nitride (h-BN) and silicon dioxide (SiO2) with good thermal conductivity were used as doped fillers to modify epoxy resin (EP). The analysis of experimental results indicated that the thermal conductivity of materials with a total doping amount of 20 wt% and a mass ratio of BN to SiO2 of 70:30 to 60:40 could increase the thermal conductivity by 118.1~126.0%. In contrast to pure EP, the thermal conductivity of composite epoxy resin materials has been significantly enhanced.

Tuning the structure and physiochemical properties of sodium alginate and chitosan composite films through sodium tripolyphosphate (STPP) crosslinking

Sodium tripolyphosphate (STPP), an inorganic and non-toxic polyphosphate, has potential applications as a crosslinking agent in the fabrication of edible films. This study utilized STPP in the development of sodium alginate-chitosan composite films, with a focus on their suitability for food packaging applications. The results indicate that the incorporation of STPP led to an increase in film thickness (from 0.048 ± 0.004 to 0.078 ± 0.008 mm), elongation at break (from 11.50 ± 1.49 % to 15.88 ± 2.14 %), water permeation (from 0.364 ± 0.010 to 0.521 ± 0.021 gmm/(m2h*kPa)), and moisture content (from 25.98 ± 0.20 % to 28.12 ± 0.17 %). In contrast, there was a decrease in tensile strength (from 30.23 ± 2.08 to 25.60 ± 1.22 MPa) and swelling index (from 752.9 ± 17.1 to 533.5 ± 8.9 %). Scanning electron microscopy (SEM) analysis revealed the formation of distinctive needle-like microcrystals with the incorporation of STPP. Fourier-transform infrared spectroscopy (FTIR) analysis indicated intermolecular interactions between STPP and the film-forming biopolymers. The data obtained from Thermogravimetric analysis (TGA) and Differential Scanning Calorimetry (DSC) demonstrated enhanced thermal stability of STPP-loaded films at elevated temperatures. Furthermore, the films exhibited increased DPPH scavenging activity with the addition of STPP. This study underscores the potential of STPP as a crosslinking agent for the development of composite edible films, suggesting applications in the field of food packaging.

Schiff base linkage of citral to zinc-casein hydrolysate chelates for preparing starch-based active films against L. monocytogenes on ready-to-eat foods

Listeria monocytogenes (L. monocytogenes) is a foodborne pathogen often found in ready-to-eat (RTE) foods, posing significant threats to human health. In this study, an active film based on cross-linking via Schiff base and electrostatic interaction to inactivate L. monocytogenes on RTE foods was constructed. Zinc-casein hydrolysate chelates (Zn-HCas) was prepared and blended with cationic starch (CSt) to form the substrates of the film. Then, Citral (CI) with excellent antibacterial properties was added to enhance the biological and packaging properties of the film through covalent cross-linking (Schiff base). Based on the zinc ion-activated metalloproteinases produced by L. monocytogenes, the cross-linked film could be disrupted and the release of CI was accelerated. The variation in color, FTIR, and amino group content proved that Schiff base reaction had taken place. Enhanced mechanical properties, barrier properties, thermal stability and antimicrobial activity against L. monocytogenes (exceed 99.99 %) were obtained from the CI/Zn-HCas/CSt film. The application on RTE cheese results demonstrated that the cross-linked film could be employed in active packaging field with the ability in maintaining the original chroma and texture properties of RTE cheese. In summary, the prepared cross-linked film could be used as an active packaging against L. monocytogenes contamination with great potential.

Preparation and characterization of green‐based anti‐ultraviolet and antidripping biodegradable film

AbstractThe biodegradable materials cannot meet the requirements as the agricultural film due to the poor UV resistance and antidripping performance. The work herein thus presented the development of the green‐based anti‐ultraviolet and antidripping multifunctional composite films using poly(butyleneadipate‐co‐terephthalate), microfibrillated cellulose (MFC), and soybean protein isolate (SPI) as the raw materials in the presence of other agents. The resulting composite films were systematically characterized using scanning electron microscope, thermogravimetry analysis (TG), UV, and rheometer measurements. The morphology changed obviously after introducing the MFC and SPI into the substrate film. In addition, the results indicated that the addition of MFC and SPI had a positive effect on the thermal stability and heat preservation of the film, respectively. The contact angle results indicated that SPI was an ideal antidripping agent and the MFC could be used as the release agent. The time of the first water drop of the film containing 2.5 g MFC and 2.0 g SPI was 6 min and 46 s, and the time of each 10 drops was less than 60 s, showing the advantages of using MFC as the release agent and SPI as the antidripping agent. The resulting multifunctional biodegradable films can be widely used in the agricultural and packaging fields.