Food Packaging and Shelf Life最新文献

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Preparation of modified atmosphere and moisture packaging membranes by blending quaternized polyether ether ketone with polyvinylidene fluoride and its application in grape packaging 季铵化聚醚醚酮与聚偏氟乙烯共混制备改良气氛和水分包装膜及其在葡萄包装中的应用
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-28 DOI: 10.1016/j.fpsl.2024.101342
{"title":"Preparation of modified atmosphere and moisture packaging membranes by blending quaternized polyether ether ketone with polyvinylidene fluoride and its application in grape packaging","authors":"","doi":"10.1016/j.fpsl.2024.101342","DOIUrl":"10.1016/j.fpsl.2024.101342","url":null,"abstract":"<div><p>The modified atmosphere and moisture packaging membranes for preserving <em>Vitis vinifera L.</em> (<em>V. vinifera</em>) were developed by blending triethylamine-grafted quaternized polyether ether ketone (QPEEK) and polyvinylidene fluoride (PVDF) using thermally induced phase separation. With the addition of QPEEK, the blend membranes exhibited increased hydrophilicity, gas transmission rate, and gas permeability coefficient. For the 5 % QPEEK/PVDF membrane, the water vapor transmission rate is 48.4 g/(m²·24 h), the water contact angle is 82.2°, and the CO<sub>2</sub>/O<sub>2</sub> separation coefficient is 2.06. Compared to other groups, this membrane exhibits better tensile, swelling, and relaxation properties. These properties facilitate achieving dynamic air equilibrium within 3 days, maintaining a suitable atmosphere inside the package (3.4–4.1 % CO<sub>2</sub> and 16.1–18.1 % O<sub>2</sub>), and timely removing moisture to prevent water vapor condensation, thus extending the shelf life of grapes to more than 25 days. Grapes packaged in 5 % QPEEK/PVDF membrane box maintained 99.3 % mass, 85.1 % firmness, and 72.2 % total phenol content, and exhibited minimal changes in soluble solids, relative electrical conductivity, and water state and distribution compared to fresh grapes. These experimental results suggest significant potential for the use of QPEEK/PVDF membranes in fruit and vegetable packaging.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Cinnamaldehyde- and nonanal-incorporated polyvinyl alcohol/colloidal silicon dioxide films with synergistic antifungal activities 具有协同抗真菌活性的肉桂醛和壬醛掺合聚乙烯醇/二氧化硅胶体薄膜
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-27 DOI: 10.1016/j.fpsl.2024.101344
{"title":"Cinnamaldehyde- and nonanal-incorporated polyvinyl alcohol/colloidal silicon dioxide films with synergistic antifungal activities","authors":"","doi":"10.1016/j.fpsl.2024.101344","DOIUrl":"10.1016/j.fpsl.2024.101344","url":null,"abstract":"<div><p>Biodegradable materials may help solve the problem of environmental pollution caused by conventional synthetic food packaging. Here, various amounts of colloidal silicon dioxide [CSD, 5, 10, and 15 wt% based on polyvinyl alcohol (PVA)] and 1 % S<sub>CAN</sub>, a 1:1 (v:v) combination of cinnamaldehyde and nonanal, were added to fabricate PVA-based films. Microstructure analyses using atomic force and scanning electron microscopes revealed that the films had uniform CSD dispersion, and the surface roughness rose along with the CSD concentration. The addition of S<sub>CAN</sub> prevented UV light transmission. In addition, the introduction of CSD enhanced the water-resistance abilities and tensile strengths of the composite films. The PVA/S<sub>CAN</sub> films exerted remarkable antifungal activities against <em>Aspergillus flavus</em> owing to a synergistic effect between cinnamaldehyde and nonanal<em>.</em> Furthermore, the PVA/S<sub>CAN</sub>/CSD film, contrasted with the PVA film containing S<sub>CAN</sub> alone, attenuated the S<sub>CAN</sub> loss during storage and also continually released S<sub>CAN</sub> from the film. In peanut preservation, the PVA/S<sub>CAN</sub>/CSD composite film was superior to the single-element films in antifungal activity, showing decreases of 76.66 % and 85.33 % in the production of conidia and aflatoxin B1, respectively. In conclusion, the PVA/S<sub>CAN</sub>/CSD composite film with high UV barrier, water-resistance ability, excellent mechanical properties and antifungal activity possesses a promising application potential in food packaging.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142084329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of ultraviolet radiation c treatment on preservation of Naematelia aurantialba in modified atmosphere packaging 紫外线辐射 c 处理对在气调包装中保存 Naematelia aurantialba 的影响
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-24 DOI: 10.1016/j.fpsl.2024.101343
{"title":"Effect of ultraviolet radiation c treatment on preservation of Naematelia aurantialba in modified atmosphere packaging","authors":"","doi":"10.1016/j.fpsl.2024.101343","DOIUrl":"10.1016/j.fpsl.2024.101343","url":null,"abstract":"<div><p><em>Naematelia aurantialba</em>, known for its health benefits but perishable due to high water content, has a limited market life. This study explored extending its shelf life using ultraviolet C radiation within modified atmosphere packaging. Ultraviolet C, typically used for sterilizing produce, has untapped potential for preserving <em>Naematelia aurantialba</em>. Samples underwent ultraviolet C with various intensities, then were stored at 2 ± 1 °C in packaging bags with 4081 mL/m<sup>2</sup>·d·atm oxygen transmission rate, with quality checks every seven days until day 42. Samples treated with 0.19 kJ/m² ultraviolet C radiation within the MAP system significantly slowed color and texture changes in <em>N. aurantialba</em>, maintaining cell integrity. This treatment also reduced the loss of aroma substances and significantly increased the total phenolic and flavonoid content in the <em>N. aurantialba</em>. Simultaneously, these samples demonstrated tester preference, highlighting the treatment's effectiveness in enhancing freshness and marketability.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a solid food simulant to evaluate migration of chemicals from paper and board food contact materials to moist food 开发一种固体食品模拟物,以评估纸和纸板食品接触材料中的化学物质向潮湿食品的迁移情况
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-23 DOI: 10.1016/j.fpsl.2024.101340
{"title":"Development of a solid food simulant to evaluate migration of chemicals from paper and board food contact materials to moist food","authors":"","doi":"10.1016/j.fpsl.2024.101340","DOIUrl":"10.1016/j.fpsl.2024.101340","url":null,"abstract":"<div><p>Food contact materials (FCMs) i.e. materials that food is packaged or handled in, must be safe for their intended use. European FCM legislation uses a risk-based approach, with a cornerstone of FCM’s safety evaluation being measurement of migration of substances from FCMs to food simulants. The standard methods mainly developed for plastic FCMs are not always suitable for less inert and moisture sensitive materials such as paper and board. However, these are becoming increasingly common as FCMs e.g. to replace single-use plastics. In addition, there is a drive to further use recycled materials. To support this development, new methods for assessing the safety of these materials are needed. In the present feasibility study, a hydrogel crosslinked through freeze-thawing of poly(vinyl alcohol) was evaluated as a food simulant for moist foods. The migration of surrogate compounds from a spiked paperboard to the hydrogel was determined and compared to the migration to a real moist food (a slice of apple), the commonly used modified polyphenylene oxide (MPPO) and a water extract. Migration of polar surrogates to the hydrogel correlated well with the migration to the apple slice. However, our results indicate that the hydrogel is less suitable as simulant for non-polar surrogates. Overall, the study demonstrates the potential of this hydrogel-based simulant for improving risk assessment of less inert FCMs.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2214289424001054/pdfft?md5=981849cc0aecf49d3066040b6ae1fdaf&pid=1-s2.0-S2214289424001054-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation technology and preservation mechanism of novel Ag NPs-loaded ZIF-67 packaging film 新型 Ag NPs 负载 ZIF-67 包装膜的制备技术和保存机理
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-14 DOI: 10.1016/j.fpsl.2024.101338
{"title":"Preparation technology and preservation mechanism of novel Ag NPs-loaded ZIF-67 packaging film","authors":"","doi":"10.1016/j.fpsl.2024.101338","DOIUrl":"10.1016/j.fpsl.2024.101338","url":null,"abstract":"<div><p>Pathogenic microorganisms pose a significant threat to postharvest fruits and vegetables, resulting in extensive food waste, economic losses, and potential risks to human health. Developing new and efficient antibacterial preservation materials is of utmost importance. In this study, we used zeolitic imidazolate framework-67 (ZIF-67) as a template to synthesize silver nanoparticles (Ag NPs) in situ, preparing Ag@ZIF-67 composite nanoparticles with broad-spectrum antibacterial properties. Then, carboxymethylcellulose (CMC) incorporated with Ag@ZIF-67 was developed for antibacterial food packaging, resulting in the creation of the Ag@ZIF-67&amp;CMC film. This film exhibited improved physicochemical properties, including enhanced mechanical strength, thermal stability, and gas barrier capabilities. Furthermore, the Ag@ZIF-67&amp;CMC film effectively inhibited the growth of bacteria in a preservation experiment involving peaches. This study confirmed that Ag@ZIF-67 as a highly promising antibacterial nanomaterial, while highlighting the Ag@ZIF-67&amp;CMC film as a potent and promising solution for effective food preservation.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Identification and health risk assessment of volatile and semi-volatile migrants along with chemical elements in food contact water-borne coating paper 食品接触水性涂料纸中挥发性和半挥发性迁移物以及化学元素的鉴定和健康风险评估
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-14 DOI: 10.1016/j.fpsl.2024.101337
{"title":"Identification and health risk assessment of volatile and semi-volatile migrants along with chemical elements in food contact water-borne coating paper","authors":"","doi":"10.1016/j.fpsl.2024.101337","DOIUrl":"10.1016/j.fpsl.2024.101337","url":null,"abstract":"<div><p>Water-borne coating paper, with its food contact potential, raises concerns due to unknown contaminants. Herein, the presence and migration of volatile and semi-volatile compounds, along with chemical elements from two water-borne coating paperboards were investigated using 4 % acetic acid, 50 % ethanol, and 95 % ethanol, while also evaluating associated health risks. The results showed that the overall migration to 95 % ethanol from both papers indicated the non-compliance with the reference limit of 10 mg/dm<sup>2</sup>. Utilizing an optimized direct immersion-solid-phase microextraction coupled to gas chromatography-mass spectrometry method, a total of 66 migrants were identified, among which 16 and 7 were classified as Cramer Ⅲ and Cramer Ⅱ, respectively, linked to coating and paper raw materials. Additionally, 28 chemical elements released from papers were analysed using inductively coupled plasma mass spectrometry, where higher levels of elements (<em>i.e.</em>, Na, K) were observed in the migration of 4 % acetic acid, potentially from additives or raw materials used in papermaking processes. More importantly, health risk assessment based on the Threshold of Toxicological Concern approach or worst-case dietary intake assumption indicated that, the estimated daily intake of most migrants and chemical elements through human exposure fell below toxicological reference values. However, certain migrants (<em>e.g.</em>, 2-ethylhexyl acrylate, methyl benzoate, phenanthrene, and longifolene) exhibited concerning migration levels in 50 % ethanol and 95 % ethanol that exceed their safety thresholds and may pose health risks. Overall, understanding the migration and potential risk of migrants are imperative for ensuring the safety of using commercially available water-borne coating paper in food contact applications.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141985778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Intelligent multi-colorimetric cellulose acetate/cobalt-based metal-organic framework antibacterial film and its application to pork preservation 智能多比色醋酸纤维素/钴基金属有机框架抗菌膜及其在猪肉保鲜中的应用
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-08 DOI: 10.1016/j.fpsl.2024.101339
{"title":"Intelligent multi-colorimetric cellulose acetate/cobalt-based metal-organic framework antibacterial film and its application to pork preservation","authors":"","doi":"10.1016/j.fpsl.2024.101339","DOIUrl":"10.1016/j.fpsl.2024.101339","url":null,"abstract":"<div><p>Nowadays, it is of high desirable to develop active smart films for food freshness monitoring in real time and protection. Herein, cellulose acetate (CA) matrix was incorporated with cobalt-based metal-organic framework (Co-MOF) to develop an active multi-colorimetric CA/Co-MOF film. The Co-MOF was of cubic structure, which was hydrogen-bonded with CA matrix with good dispersion. In addition to the outstanding UV-blocking capacity, the presence of Co-MOF enhanced the film′s strength, thermal stability, and barrier. Interestingly, the films of CA/Co-MOF were sensitive to ethanol (EtOH), NH<sub>3</sub> and NH<sub>3</sub>-H<sub>2</sub>S with visual color changes. Among them, the color changes towards EtOH and NH<sub>3</sub> were reversible, while towards NH<sub>3</sub>-H<sub>2</sub>S was irreversible. Furthermore, the films had good antibacterial activity<em>.</em> In practical application scenarios, the target film of CA/Co-MOF20 can monitor the pork freshness and extend its shelf-life by ∼100 % at 25 ℃, suggesting its good perspective in freshness monitoring and protection. This study will provide a new strategy for development of active multi-colorimetric film for food packaging.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of cinnamon essential oil-loaded core-shell nano film for the preservation of chilled flesh foods 开发用于冷藏肉类食品保鲜的肉桂精油芯壳纳米薄膜
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-08 DOI: 10.1016/j.fpsl.2024.101310
{"title":"Development of cinnamon essential oil-loaded core-shell nano film for the preservation of chilled flesh foods","authors":"","doi":"10.1016/j.fpsl.2024.101310","DOIUrl":"10.1016/j.fpsl.2024.101310","url":null,"abstract":"<div><p>To extend the shelf-life of chilled flesh foods, an antimicrobial packaging incorporated with cinnamon essential oil (CEO) was developed by emulsion electrospinning using polyvinyl alcohol (PVA) and zein. The CEO demonstrated an encapsulation efficiency and loading capacity of 87.42 % and 13.83 %, respectively. Electron microscopy and Fourier transform infrared spectra confirmed the successful encapsulation of CEO in the core part of nanofiber with a diameter on average of 976.12 nm. Furthermore, the results of antimicrobial studies showed that the inhibition zones of nano film against E. coli, S. aureus, P. fluorescens, and L. monocytogenes were 8.41, 26.77, 18.93, and 36.24 mm, respectively, and the non-contact inhibition rates were 100 %. Preservation studies revealed that the nano film could effectively extend shelf life of the pork loin and shrimp to 10 and 6 days, along with the released contents of CEO being 90.9 % and 80.4 %, respectively. Therefore, the nano film exhibits a potential application for the preservation of chilled flesh foods.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a coating material composed of sodium alginate and kiwifruit seed essential oil to enhance persimmon fruit quality using a novel partial coating technique 利用新型局部包衣技术开发由海藻酸钠和猕猴桃籽精油组成的包衣材料,以提高柿子的品质
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-05 DOI: 10.1016/j.fpsl.2024.101331
{"title":"Development of a coating material composed of sodium alginate and kiwifruit seed essential oil to enhance persimmon fruit quality using a novel partial coating technique","authors":"","doi":"10.1016/j.fpsl.2024.101331","DOIUrl":"10.1016/j.fpsl.2024.101331","url":null,"abstract":"<div><p>We developed edible films composed of sodium alginate (SA) and varying concentrations of kiwifruit seed essential oil (KSO) (10 %, 30 %, and 50 % v/w SA) and extensively characterized. Gas chromatography-mass spectrometry/mass spectrometry revealed that cyclotene, valencene, and camphene are the major components of KSO. Film’s physiochemical parameters revealed that KSO increased the solution’s viscosity from 4.8 to 6.0 cp, and the film’s opacity from 4.2 to 10.6 mm<sup>-1</sup>, while also enhancing thermal stability and elongation at break. Fourier-transform infrared spectroscopy and scanning electron microscopy confirmed the induction of KSO into SA. Water contact angle, moisture content, and water vapor permeability results indicated that KSO30 was more hydrophobic than control, KSO10 and KSO50, identifying KSO30 the optimal composition. The final treatments to evaluate partial (P) and full (F) coating on persimmon fruits were uncoated (control), SA, and KSO30. Results indicated that KSO30 was effective in reducing the weight loss and maintaining the firmness and respiration rate compared to the control and SA. Although no significant differences in the respiration rate, firmness, color, or TSS were observed between partially and fully coated persimmons, full coating was more effective in retaining weight loss and pH. At the final day of storage, KSO30 had 5.1 % weight loss and a pH of 6.3, while control fruits had 6.8 % weight loss and a pH of 6.1. Therefore, incorporating SA with KSO is a promising coating material for prolonging the shelf-life of persimmon fruit, and partial coating could be a more economical and viable alternative to full coating.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141947014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Bilayer pH-sensitive colorimetric indicator films based on chitosan/purple carrot extract and gellan gum/Mg-carbon dots for visual monitoring of pork freshness 基于壳聚糖/紫胡萝卜提取物和结冷胶/镁碳点的双层 pH 值感光比色指示膜,用于目测猪肉新鲜度
IF 8.5 1区 农林科学
Food Packaging and Shelf Life Pub Date : 2024-08-05 DOI: 10.1016/j.fpsl.2024.101336
{"title":"Bilayer pH-sensitive colorimetric indicator films based on chitosan/purple carrot extract and gellan gum/Mg-carbon dots for visual monitoring of pork freshness","authors":"","doi":"10.1016/j.fpsl.2024.101336","DOIUrl":"10.1016/j.fpsl.2024.101336","url":null,"abstract":"<div><p>A pH-sensitive colorimetric bilayer film was constructed on the basis of layer-by-layer self-assembly, with chitosan (CS)-loaded purple carrot anthocyanin (PCA) as the inner indicator layer and gellan gum (GG)-loaded Mg-doped carbon dots (Mg-CDs) as the protective outer layer. X-ray diffraction and scanning electron microscopy analyses confirmed the successful preparation of the bilayer film and the incorporation of Mg-CDs. Fourier transform infrared spectroscopy indicated that the Mg-CDs formed hydrogen bonds with the film matrix. Thermogravimetric analysis revealed that the Mg-CDs improved the thermal stability of the double-layer films. Moreover, the addition of 7 wt% Mg-CDs increased the water vapor permeability, oxygen permeability, and tensile strength of the films by 0.94-, 0.79-, and 3.18-fold, respectively. The antioxidant and antimicrobial activities of the films were significantly enhanced by including Mg-CDs as the active agents. Illumination experiments revealed that the relative color change (S values) increased by only 2.76 % and 4.69 % after the addition of 7 wt% Mg-CDs to the GG -Mg-CDs layer after 21 days of visible light and 72 h of UV light exposure, respectively. These bilayer films containing PCA and Mg-CDs exhibit good pH color responsiveness and biosafety. The C-P/G-7 %CD film had the best overall performance and can effectively reflect pork freshness during storage. Therefore, this research has great potential for developing a double-layer film for monitoring meat quality changes in intelligent food packaging.</p></div>","PeriodicalId":12377,"journal":{"name":"Food Packaging and Shelf Life","volume":null,"pages":null},"PeriodicalIF":8.5,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141946958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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