Food Bioscience
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2024
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IF 4.8
Xueyan Yun,Shuai Yuan,Shuo Shi,Yangyang Wang,Linze Liu,Lijun Song,Tungalag Dong
Amine-responsive fluorescent indicator films for meat freshness were constructed by incorporating β-glucan grafted with fluorescein isothiocyanate (FITC) in polyvinyl alcohol (PVA). The structural, thermal, and responsive properties of grafted copolymers (βGlu-FITC) were investigated. The results of 1 H NMR spectra showed that βGlu-FITC exhibited proton signals between 6.5 and 6.7 ppm, suggesting the successful grafting of FITC onto β-glucan. The fluorescence quantum yield of βGlu-FITC was 18.72%, which was higher than that of β-glucan of 12.94% at the optimum excitation wavelength of ultraviolet light of 365 nm. With the incorporation of PVA as a film-forming matrix, βGlu-FITC/PVA films showed high yellow-green fluorescent responsiveness under volatile ammonia and pH solution. When the film was used for meat freshness, the 0.06βGlu-FITC/PVA film provided a noticeable fluorescent indication of pork freshness that corresponded to increases in total volatile basic nitrogen, total colony counts, and drip loss, suggesting its potential for meat packaging and as a freshness indicator.
研究领域:
食品科学
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生物化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Wanyu Li,Jiamin Ye,Zhiwen Jia,Haipeng Yu,Linghao Li,Hong Wang,Enchen Jiang,Yan Sun,Xiwei Xu
Full utilization of biomass after fractionation of its components is an effective way to maximize the value of biomass. Herein, in this study, a new acetal-mediated deep eutectic solvent (DES) was explored and its excellent performance in separating lignin from biomass as well as retarding lignin condensation has been observed. Subsequently, the separated lignin and cellulose-rich residue were used to prepare sunscreen and transparent food indicator films, respectively. The results showed that the acetal-mediated DES pretreatment can reduce the recalcitrance of bagasse, stabilize lignin (β-O-4 content of 68.6% in the lignin), and retain most of the cellulose (ie. 83.43%). Besides, the pretreatment enhanced the subsequent hydrogenolysis of lignin, and the higher β-O-4 content of the lignin contributed to the high yield of aromatic monomers (40.94%). In addition, regenerated lignin was attractive for sunscreen applications due to its lighter color and excellent UV-blocking properties. Furthermore, cellulose smart indicator film was highly sensitive, biodegradable, has excellent physical properties, and allows visual real-time monitoring of seafood spoilage using smartphones. Meanwhile, the yield of the removed hemicellulose converted to xylose in the pretreatment process reached 99.24%. In general, this work proposed a sustainable bio-refinery approach for the full upgrading of biomass.
研究领域:
生物化学
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材料科学
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可再生资源工程
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2023
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IF 6.6
Qi Zhang,Jian Zhang,Qingwei Ping,Zhihui Sui,Xiangyu Cao,Tianyuan Xiao
Curcumin-based smart films have gained widespread attention in the packaging field due to their convenience, ease of use, and environmental sustainability. However, its poor pH response, unsatisfactory mechanical properties , and limited moisture resistance severely restrict its applications. In this study, we prepared a curcumin-based bilayer indicator film with a protective layer consisting of gelatin, carboxymethyl cellulose , and hexadecyl trimethoxy silane to provide mechanical protection and moisture resistance, and an indicator layer consisting of gelatin, curcumin, and malvidin to improve the pH sensitivity of the curcumin-based film and broaden the range of color indication. Owing to the hydrophobic effect of the protective layer and cross-linking between the bilayers, the curcumin-based bilayer film exhibited excellent mechanical properties with a stress of 15.3 MPa, a strain of 101.6 %, and a Young's modulus of 38.9 MPa. The moisture resistance of the film was also improved, with a water vapor permeability as low as 1.11 ± 0.15 × 10 −10 g m m −2 Pa −1 s −1 . In addition, with the addition of malvidin, the curcumin-based bilayer film showed greater sensitivity to pH and more pronounced color changes compared to the gelatin/curcumin film for practical applications in monitoring shrimp freshness. Overall, this study demonstrated the applicability of the prepared curcumin-based bilayer indicator film for monitoring shrimp freshness and also broadened the prospects of curcumin-based films in the field of smart packaging.
研究领域:
食品科学
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包装工程
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2023
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IF 11.2
Yaqiong Miao,Zenghui Chen,Jinrun Zhang,Nan Li,Zhenxuan Wei,Yan Zhang,Xinyi Wu,Junhao Liu,Qin Gao,Xiaqing Sun,Qi Sun,Jianfa Zhang
Food freshness monitoring is vital to ensure food safety. Recently, packaging materials incorporating pH-sensitive films have been employed to monitor the freshness of food products in real time. The film-forming matrix of the pH-sensitive film is essential to maintain the desired physicochemical functions of the packaging. Conventional film-forming matrices, such as polyvinyl alcohol (PVA), have drawbacks of low water resistance, poor mechanical properties, and weak antioxidant ability. In this study, we successfully synthesise PVA/riclin (P/R) biodegradable polymer films to overcome these limitations. The films feature riclin, an agrobacterium -derived exopolysaccharide . The uniformly dispersed riclin conferred outstanding antioxidant activity to the PVA film and significantly improved its tensile strength and barrier properties by forming hydrogen bonds . Purple sweet potato anthocyanin (PSPA) was used as a pH indicator. The intelligent film with added PSPA provided robust surveillance of volatile ammonia and changed its color within 30 s in the pH range of 2–12. This multifunctional colorimetric film also engendered discernible color changes when the quality of shrimp deteriorated, demonstrating its great potential as an intelligent packaging material to monitor food freshness.
研究领域:
食品科学
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材料科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
Food and Bioprocess Technology
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2025
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IF 5.8
Liu Chang,Li Ning,An Xinyu,Li Xu,Liu Zhiming
A fully natural and biodegradable film (MC 5 /ZA 5 -DE 3% ) was developed using methylcellulose (MC) (a plant-based biopolymer with excellent film-forming properties and biocompatibility), zinc alginate (ZA) (derived from brown seaweed, served as a biodegradable component with excellent film-forming properties and enhanced mechanical strength through cross-linking with Zn 2+ ), and anthocyanin-rich dragon fruit peel extract (DE) (a natural antioxidant with pH sensitivity and colorimetric properties). The film exhibited distinct color changes from purple to green across a range of pH-buffered solutions, demonstrating its pH sensitivity. The antimicrobial activity of the film showed a significant inhibition zone against Staphylococcus aureus and Escherichia coli , with a 99.99% bacterial reduction. The incorporation of Zn 2+ also improved the flame retardancy of the film, reducing flammability by 34.5%. Optical analysis showed that the MC 5 /ZA 5 -DE 3% film exhibited excellent UV-blocking performance due to the synergistic effect of Zn 2 ⁺ and anthocyanins, which enhanced UV absorption (200–400 nm) and reduced visible light transmittance, making it an effective UV barrier with acceptable transparency for packaging. Furthermore, the film served as an intelligent indicator of food spoilage, changing color from purple to green with increased storage time, indicating elevated total volatile basic nitrogen (TVB-N) levels. The MC 5 /ZA 5 -DE 3% film is non-toxic and suitable for large-scale industrial production, highlighting its potential for intelligent food packaging applications.
研究领域:
食品科学
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材料科学
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生物技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Shuhan You,Xiaoyun Zhang,Yilin Wang,Yaobo Jin,Manman Wei,Xiudan Wang
Color indicator films for fish freshness were fabricated by incorporating κ-carrageenan (CAR) polymer with red grape skin extract (GSE) as a pH-sensing agent and silver nanoparticles (AgNPs) as an antimicrobial agent. Anthocyanins in GSE exhibited distinguished pH responsive color changes. GSE and AgNPs were well compatible with CAR with intramolecular interactions, approved by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis, thermo-gravimetric analysis (TGA) and differential scanning calorimetry (DSC). GSE-containing films displayed distinguished color changes in response to pH variations and volatile ammonia. Enhanced UV blocking ability and strong antioxidant activity were revealed for GSE included films without sacrificing the physico-chemical properties of the CAR film. Films containing AgNPs showed improved mechanical strength and strong antimicrobial ability against both Escherichia coli and Staphylococcus aureus . The CAR/AgNPs/GSE film displayed a distinctive color change corresponding to changes in the total volatile basic nitrogen (TVB-N) of fish during storage. In addition, the CAR/AgNPs/GSE film showed excellent color stability to consecutive UV exposure and its storage time at 25 °C is expected to be at least 240 days, which indicates that it has high potential as an intelligent food freshness indicator film.
研究领域:
食品科学
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材料科学
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生物化学
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DOI
高影响因子
Journal of Materials Chemistry A
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2025
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IF 9.5
Yurou Chen,Yili Wei,Wenjun Song,Yiwen Zhang,Wenjie Tan,Jun Li,Shun Wang,Yadong Wu,Huile Jin
Phenolphthalein (PHT) is always applied as an acid-base indicator but suffers from too wide a range of characterization and uneven dispersion in thin films. To solve this problem, in this work, a composite filler SiO₂@PHT-1 with a jujube cake structure was designed. The size of phenolphthalein particles was effectively regulated by intervening in the growth process of phenolphthalein nuclei through silica (SiO₂). This also improved the dispersion of PHT in fluororubber (FKM) films, as well as the indicator film's tensile strength (57.1%) and initial decomposition temperature (201.6 °C), resulting in the pH indicator film with excellent tensile properties and thermal stability. The FKM/SiO₂@PHT-1 film is also capable of determining the pH value of a solution based on color and phenomena. In addition, the dense protective layer formed by the silica retards the release of PHT in the sample solution, which contributes to the reusability of the film. This method shows great promise and can be applied to laboratory and swimming pool alkalinity testing.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Xinghai Huang,Jingjin He,Lu Yao,Ziqi Zhu,Jianwei Luo,Peiyuan Li,Jianhua Wei,Haiyi Zhong
Intelligent food packaging, as an innovative direction for enhancing food quality monitoring capabilities, has garnered extensive attention among consumers and in the research community in recent years. This study constructed composite film materials using sodium alginate (SA) and polyvinyl alcohol (PVA) as the matrix, loaded with the natural active ingredient curcumin to evaluate the potential of the composite film as an indicator of shrimp freshness. The results revealed that the composite film had a thickness of less than 0.1 mm and could effectively block ultraviolet-visible light. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FT-IR) analyses indicated that curcumin was uniformly distributed within the film matrix. This composite film exhibited strong antioxidant activity (ABTS scavenging rate: 82 %; DPPH scavenging rate: 47.9 %) and reliable pH-responsive characteristics, turning purple or reddish-brown when the pH exceeded 10. This property provides a simple and intuitive method for detecting changes in food quality. In terms of monitoring shrimp freshness, the composite film effectively indicated spoilage. The SA-PVA-CUR30 film changed from light yellow to purple on the fourth day, with a significant increase in the ΔE value (from 34.52 to 51.89), demonstrating optimal indicating performance. In conclusion, this pH-sensitive composite film offers new insights for innovation in food packaging and lays a foundation for the precise control of food quality.
研究领域:
食品科学
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材料科学
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分析化学
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食品安全
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智能包装
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2024
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IF 8.5
Si Xia,Xiangjun Fang,Weijie Wu,Guannan Wang,Huizhi Chen,Zhiwen Hu,Li-Shu Wang,Ruilin Liu,Haiyan Gao
The marketability of natural pigment-based indicator films is impeded by their weaker color rendering and stability compared with synthetic pigments. Here, we developed novel colorimetric indicators by blending polyvinyl alcohol (PVA) with carboxymethyl cellulose (CMC) and combining alizarin and curcumin. Compared with the individual materials, the PVA and CMC composite films demonstrated superior thermal stability and water resistance. The manufacturing process of these colorimetric indicators was optimized using response surface methodology. The optimum conditions were as follows: PVA at 3.92 g/100 mL; plate pour amount, 48.6 mL; pigment content, 5.8 g/100 mL; pigment ratio, 0.76. The optimized film showed a robust response to CO 2 (a color difference of 65.06 ± 2.43). The color difference of the optimized film improved by 98.5 % and 16.86 % for kiwifruit stored at room and low temperatures, respectively. This substantial color change aids in identifying the optimal consumption window for kiwifruit, boosting indicator precision and kiwifruit freshness accuracy.
研究领域:
食品科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
FOOD AND BIOPRODUCTS PROCESSING
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2024
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IF 3.5
Yanhong Liu,Xiwang Mu,Hui Wang,Mingyue Wang,Lingling Zhang,Guangrao Chen,Shuo Wang
Perishable food poses significant food safety hazards and threatens public health. Consequently, pH indicator films have garnered considerable interest due to their potential for early detection of food spoilage. This research used red-fleshed pitaya peel powder as raw material, and betalaines were extracted using DES composed of choline chloride and citric acid as hydrogen bond donors and acceptors, respectively. The extraction conditions were optimized by response surface experiment, and the content of betalaine (BT) extracted in the verification experiment was 4.39 mg/g. The film was prepared using the solvent casting technique. The above DES/BT solution (DES/BT) was added into sodium alginate (SA) and sodium carboxymethyl cellulose (CMC) pH indicator films, and the effects of DES/BT on the physicochemical, optical and surface properties of the films were studied. The results showed that the film with 0.7 mL (1.4 %, v/v) DES/BT had the best tensile strength(23.14 MPa), water solubility(16.02 %), and water vapor permeability (7.64×10 −5 g*m*m −2 *Pa*h −1 ). The addition of DES and DES/BT made the film surface texture uniform and wrinkle-free and the UV transmittance decreased from 73.27 % to 61.83 %. Experiments on the film in different pH solutions showed that the film had a colorimetric response. Overall, the incorporation of DES/BT into the films presents significant potential for monitoring food freshness.
研究领域:
食品科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Food Packaging and Shelf Life
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2022
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IF 8.749
Shuo Shi,Xiaowei Xu,Jia Feng,Yanming Ren,Xue Bai,Xiufang Xia
The pH, ammonia, and H 2 S sensitivity of sodium alginate/black soybean seed coat anthocyanin (SA/BSSCA) films and their response mechanism were analyzed based on stability, intermolecular interactions, and microstructure. The results showed that the with the BSSCA content increased from 0.02% to 0.30%, SA/0.02–0.12BSSCA films had the highest color stability. The highest sensitivity to pH, ammonia, and H 2 S was observed for the SA/0.12–0.30BSSCA films, meanwhile, the SA/0.12BSSCA film had the highest sensitivity to meat unfreshness and spoilage. The incorporation of BSSCAs reduced the water solubility, water vapor absorption, and permeability of the films. With the BSSCA addition, the intermolecular interaction between BSSCAs and SA intensified, reducing the film roughness and number of aggregated particles, resulting in compact microstructures, which improved the film sensitivity. Thus, the SA/0.12BSSCA film was sensitive to pH, ammonia, and H 2 S and, therefore, meat spoilage, while having higher stability, moderate water barrier properties, and denser microstructure.
研究领域:
食品科学
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生物化学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2025
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IF 2.5
Shouyan Zhu,Huimin Wu,Rongrong Ma,Xiaoying Wang,Qin Wu
The good water solubility and film-forming properties of sodium carboxymethylcellulose (CMC–Na) render it an excellent matrix for a pH-responsive color indicator film, but its basic character inhibits its direct application. Natural acids can be used to solve this problem, but the buffering system formed in these processes may decrease the sensitivity and improve the heterogeneous compound distribution of the film. Previous studies have tried to address this problem by adjusting the species and amounts of the acids. However, the underlying mechanism has not been comprehensively clarified. Herein, a CMC–Na and CaCl2 mixture was used as the matrix for a pH-responsive color indicator film, alizarin (AZ) was used as the pH indicator, cinnamaldehyde (CMA) was used as an ultraviolet (UV) shielding agent, and natural acids were used as pH-controlling agents. Three protic acids with distinct numbers of acidic protons and pKa, acetic acid (monoacid), tartaric acid (diacid) and citric acid (triacid), were compared to elucidate the effect of these properties on the matrix pH, dye dispersion, and film response. The results showed that tartaric acid can be a good candidate in solving the problem on a basic CMC–Na matrix owing to its good performance in adjusting the film color and the sensitive color response of the resulting film at pH 6.0–7.0. The hydrogen bonds, hydrophobic interactions and chelation reactions formed among the compounds improve the mechanical property and oxygen barrier performance of the film, which are also beneficial to the homogeneous distribution of AZ and CMA, leading to a uniform color response and good UV-shielding performance. This film displays excellent color response quality in beef sub-freshness detections, suggesting its high sensitivity in “point-of-care” detections of real meat samples via naked eyes.
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）