PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 11
·747-753
·
IF 1.808
Hong-Biao Chen,Chang-Ying Hu
Polypropylene nanocomposites have great potential applications in food packaging and the evaluation of the migration of nanoparticles is important for the food safety. Three types of polypropylene (homopolymer of polypropylene, PPH; blockcopolymer of polypropylene, PPB; random copolymer of polypropylene, PPR) nanocomposite films with or without coupling agent were tested in 3% acetic acid as food simulant. The migration amount of zinc was quantified by inductively coupled plasma atomic emission spectroscopy. The surface morphology and crystallinity were explored by field emission scanning electron microscopy, atomic force microscopy, and differential scanning calorimetry, respectively. The results showed that the incorporation of titanate coupling agent could inhibit ZnO-NPs migration from the films since titanate coupling agent could improve the interface between ZnO-NPs and PP molecular chain segment. Furthermore, the migration rate of zinc was dependent on the degree of crystallinity ( X c ) of PP and their order of the maximum migration rate was PPH, PPB and PPR. The notable phase separation could be observed from the morphology of nano-ZnO/PPH, while ZnO-NPs could be well dispersed in the PPR matrix. Thus, ZnO-NPs restricted the molecular chain segment of PPH and reduced its X c from 88.6% to 73.2%. The results demonstrated that titanate coupling agent and PPR could inhibit the migration of ZnO-NPs significantly.
研究领域:
食品安全
·
聚合物纳米复合材料
·
材料科学
·
迁移研究
✓ 已验证
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 10
·679-688
·
IF 1.808
Yan Yan,Chang-Ying Hu,Zhi-Wei Wang,Zi-Wei Jiang
Food contact materials contain non-intentionally added substances from degradation, and reaction processes could rise food safety problems. Three polypropylene random copolymer composite films were prepared by extruding the polypropylene random copolymer matrix with Irgafos 168, Irgafos 168 and nanocopper, Irgafos 168 and KH550 modified nanocooper, respectively. To evaluate the degradation behaviors of Irgafos 168, the films were treated by UV irradiation, microwave treatment, sunlight exposure, placed in different oxygen concentration conditions, suffered the extrusion process, and high temperature. Migration test was conducted at 20°C, 40°C, and 70°C with films tested in food simulant. GC-MS was adopted to determine the concentration of Irgafos 168 and its two degradation products, 2,4-di-tert-butylphenol (DP1) and tris (2,4-di-tert-butylphenyl) phosphate (DP2). UV irradiation significantly accelerated the degradation of Irgafos 168 compared with other treatments; DP1 and DP2 increased to maximum value at 24 hours and decreased afterwards, simultaneously. The introduction of nanocopper notably promoted DP1 generation after extrusion whereas suppressed DP2 generation which also caused a higher degradation rate of Irgafos 168 and sharp decrease of DP1 under microwave treatment, sunlight exposure, and high temperature treatment. No significant difference between the effects of nanocopper and KH550 modified nanocopper on degradation of Irgafos 168 was found. For the migration test, the introduction of nanocopper inhibited the migration of Irgafos 168 and DP2 whereas promoted the migration of DP1. No significant difference between the introduction of nanocopper and KH550 modified nanocopper on migration of Irgafos 168 and DP1, DP2 was found.
研究领域:
食品安全
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 9
·575-584
·
IF 1.808
Shuting Huang,Huijie Li,Yixiang Wang,Xinghai Liu,Houbin Li,Zhan Zhan,Ling Jia,Lingyun Chen
Oxygen is crucial to food preservation and food spoilage. For the purpose of monitoring the integrity of modified atmosphere packaging (MAP) by nondestructive testing and controlling the reaction rate during recovery stage, we reported on a convenient and visual colorimetric oxygen indicator based on a graphene/titanium oxide composite, incorporating glycerol, methylene blue (MB), hydroxyethyl cellulose, and polyvinyl alcohol. The graphene/titanium oxide composite was synthesized from a modified Hummers synthesis of graphene oxide, followed by the hydro-thermal treatment with butyl titanate without using any reducing agent, then the morphology and structure characteristics were analysed by X-ray diffraction, Fourier transform infrared, Raman spectra, ultraviolet - visible spectroscopy, SEM, and TEM. Supported by the performance tests using ultraviolet - visible spectroscopy and CIElab, the indicator demonstrated the pseudo first-order kinetics of MB for MAP in detecting stage. The results confirmed that the prepared colorimetric indicator could actually detect the integrity of MAP without destruction. Additionally, the reaction time of indicator in recovery stage can be controlled by changing the concentration of MB because of pseudo first-order kinetics.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2018
·Vol. 31
·期 6
·433-439
·
IF 1.808
Li-Jing Lu,Li-Xin Lu
High density polyethylene/low density polyethylene (LDPE) antioxidant multilayer films were prepared by the co-extrusion method, and quercetin was incorporated in the LDPE layers as an antioxidant. The release rates of quercetin and the antioxidant activities of films were adjusted by changing the amount of ethylene vinyl acetate (EVA) and diatomite added into the LDPE active layer. The morphologies of the films were observed by SEM, and the release property of quercetin was characterized by a high-performance liquid chromatography (HPLC) method. The mechanical properties and heat sealing performance of the films were influenced to a certain extent by the amounts of EVA and diatomite in the active layers, while the barrier properties of the films were almost unchanged. The release of quercetin from the active films to a food simulant (95% alcohol) at 37°C was measured over 55 days. When the EVA amounts were 30% and 40% to 50%, the diffusion coefficients, D, were 10 −14 and 10 −13 cm 2 /s, respectively. In addition, the antioxidant activity values of the films were enhanced as the EVA amount increased. When adding diatomite into the active layer with 50% EVA, the diffusion coefficient, D, was 10 −11 cm 2 /s, and the quercetin was almost completely released with a partition coefficient, K, of less than 1. Meanwhile, the antioxidant activity values of the films exceeded 95%. The antioxidant release rate could be adjusted within a wide range; thus, these active films could be used for food antioxidant protection.
研究领域:
材料科学
·
聚合物科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2017
·Vol. 30
·期 9
·587-600
·
IF 1.32
Haili Wang,Chunxiang Yang,Jing Wang,Mo Chen,Donglei Luan,Li Li
Various studies have provided information on active packaging to prevent food putrefaction effectively . In this work, ethylene–vinyl alcohol copolymer (EVOH) films with geraniol (Ger) and α-terpilenol (Ter) were successfully prepared by extrusion. The mechanical, thermal, oxygen barrier and antimicrobial properties of the packaging films were characterized, and the application of the films in snakehead preservation was examined. Thermogravimetric analysis showed that the addition of Ger and Ter did not decrease the films properties but improved their oxygen barrier property and thermostability. Moreover, the incorporation of Ger and Ter inhibited the growth of Escherichia coli , Salmonella enterica and Listeria monocytogenes . Both of the films, EVOH/Ger (EVOH/Ger) and EVOH/Ter (EVOH/Ter), reduced Salmonella enterica by 2.36 ± 0.17 and 1.91 ± 0.06 log units, respectively. Meanwhile, the effects of EVOH/Ger and EVOH/Ter on quality assessment of snakehead slices were examined through sensory tests and analyses of biochemical indices during refrigerated storage (4°C ± 1°C) for 10 days. Sensory properties, total viable counts, total volatile basic nitrogen, thiobarbituric acid and pH values were evaluated. On eight day, compared with the control fish samples, the total viable counts and total volatile basic nitrogen values cut down 1.98 ± 0.02 log units and 11.3 ± 0.11 mgN/100 g, respectively, for fish samples packaged by EVOH/Ger. The active films containing 6% (wt) Ger and 6% (wt) Ter inhibited the growth of E. coli , S. enterica and L. monocytogenes and effectively extended shelf life by 4–5 days under cold-storage conditions compared with the control group. Copyright © 2017 John Wiley & Sons, Ltd.
研究领域:
食品科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2016
·Vol. 29
·期 7
·383-396
·
IF 1.292
Hui Yang,Jing Wang,Fuxin Yang,Mo Chen,Dongxiang Zhou,Li Li
Active packaging provides a way to prevent the food putrefaction effectively . Various studies provide information on the actual preservation effect of active packaging or the migration of active agents from active films into various food stimulants separately. However, there is little related data available regarding the combined analysis of release and preservation effect. In this work, we examined the properties of active food packaging films successfully produced by extrusion of ethylene vinyl alcohol copolymer (EVOH) films with clove essential oil (C). The characterization of mechanical, thermal and barrier properties of the packaging polymers film showed that the addition of clove essential oil did not decrease their properties and C as plasticizer improved process fluidity of EVOH resin. The release of C from film to various food stimulants was measured by using HPLC, and Fickian diffusion models were used to fit the data with appropriate equation. The effects of E/C (ethylene vinyl alcohol copolymer/clove essential oil) films on quality assessment of Grass Carp slice based on sensory analysis and biochemical indices during refrigerated storage (4 ± 1°C) were examined over the period of 10 days. Total volatile basic nitrogen (TVB-N), total viable counts, pH, TBA, water holding capacity (WHC) and texture properties were evaluated. The results indicated that the active film containing 3% clove essential oil had different release parameters in four food stimulants and it could effectively maintain the fish freshness and extend the shelf life to 7–8 days during cold storage compared with control group, which was only 4 days. Copyright © 2016 John Wiley & Sons, Ltd.
研究领域:
食品科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2014
·Vol. 27
·期 9
·693-700
·
IF 1.584
Ling-Ling Wu,Jia-jun Wang,Xia He,Tao Zhang,Hui Sun
The ultra-thin (polyethyleneimine/graphene oxide) n [(PEI/GO) n ]multilayer films on poly(lactic acid) (PLA) were constructed via the layer-by-layer assembly. Here, the electrostatic interactions between PEI and GO were used to obtain the nanoscale composite membrane of (PEI/GO) n on the surface of PLA film. With the number of assembling layers increased, the oxygen permeability (PO 2 ) of PLA film decreased substantially. As a 0.06 wt% GO solution was used with only four layers, the PO 2 decreased from 53.8 to 0.377 × 10 −4 cm 3 /m 2 /d/Pa, only 0.7% of the original PLA film. At the same time, the coated PLA film also presented a good transparency and better mechanical properties. It is a novel way to use GO on biodegradable packaging materials. Copyright © 2014 John Wiley & Sons, Ltd.
研究领域:
材料科学
·
包装工程
·
生物降解材料
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2022
·Vol. 35
·期 7
·557-567
·
IF 2.545
Rongkun Liu,Meijie Qu,Xuewen Qiu,Hai Wang,Mingshuai Fan,Ali Zhang,Qiushan Chen,Yuezhen Bin
Aiming at development of novel medical packings, poly (ethylene terephthalate) (PET)-based membranes with hydrophobic and antibacterial properties were prepared by electrostatic spinning of a blend of thermoplastic polyurethane (TPU), nano SiO 2 and Ag particles on PET nonwoven. In cooperation with electro-spun TPU/SiO 2 layer, the water contact angle (WCA) of PET nonwoven fabric was improved from 60° to 115–130°, and the water vapour transmission rate was 2200–2500 g/m 2 /24 h. It indicates that the modified PET nonwoven membrane exhibits a much better water resistance, highly increased hydrophobicity and moderate water permeability. Nano-silver provided excellent antibacterial properties for this non-cytotoxic PET/TPU/SiO 2 /Ag composite membranes. The PET/TPU/SiO 2 /Ag composite membranes had high mechanical properties, which exhibited a tensile strength of 56 MPa in the longitudinal direction and 35 MPa in the transversal direction, and tear strength of 30 kN/m in the longitudinal direction and 48 kN/m in the transversal direction. This new PET/TPU/SiO 2 /Ag composite membranes showed broad application prospects in the medical packaging industry.
研究领域:
材料科学
·
医学工程
·
生物材料
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2023
·Vol. 36
·期 11
·941-950
·
IF 2.6
Wenjiao Ge,Han Yu,Xiaohui Wang
Natural antioxidants are beneficial additives for active packaging due to their ability to resist oxidative damage. Polymeric micelles are effective in delivering natural antioxidants in aqueous environments. However, individual encapsulation of a single antioxidant may not be sufficient to meet the needs of modern food packaging. A dual natural antioxidant-loaded micellar system (i.e., vitamin E [VE] and curcumin [Cur]) was developed to achieve combined functionality and high loading concentration. Chitosan-graft-oleic acid (CSOA) micelles were employed as carriers to co-encapsulate VE and Cur through a facile ultrasound-assisted self-assembly method. The prepared VE and Cur co-loaded micelles (CSOA/VE/Cur) exhibited a uniform spherical structure with an average particle size of 210.6 nm and a zeta potential of +29.5 mV. Moreover, the co-encapsulation of VE and Cur showed a significant enhancement in both entrapment efficiency, loading capacity and stability as compared to the individual encapsulation of either VE or Cur. In addition, the CSOA/VE/Cur micelles showed improved antioxidant activity than free VE/Cur at the same concentrations, as evidenced by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Moreover, the micellar materials were utilized to fabricate regenerated cellulose (RC) films with antioxidant properties, highlighting their potential as additives for antioxidant active packaging.
研究领域:
食品科学
·
材料科学
·
包装工程
✓ 已验证
产品关联
DOI
高影响因子
PACKAGING TECHNOLOGY AND SCIENCE
·
2023
·
IF 2.6
Zheng Lu,Xuechun Sun,Augustine Atta Debraha,Zhenxia Du
This study utilized ultra-high-performance liquid chromatography combined with quadrupole time-of-flight mass spectrometry and gas chromatography–mass spectrometry techniques to analyze multiple batches of non-polyvinyl chloride (PVC) soft bags exposed to three extractants. Based on an established library of relative response factors for more than 30 different polymer additives, analytical evaluation thresholds for large volume injectables were determined, and 30 extractables were screened and (semi-)quantitatively analyzed. To identify variations in extractables between batches, multivariate statistical methods such as principal component analysis, heat map analysis, and hierarchical cluster analysis were employed. Additionally, a comprehensive risk assessment of extractables and a biosafety assessment of leachables were conducted. The results of the study revealed that the concentrations of two extractables exceeded the established safety threshold. Moreover, one of these extractables was deemed to pose a mutagenic risk based on the consistent findings of two (Q)SAR software tools. Notably, certain extractables exhibited discrepancies in their content between batches, with particular emphasis on 1,3-bis(3,5-di- tert -butyl-4-hydroxybenzyl)-1,3,5-triazinane-2,4,6-trione. This discrepancy led to inconsistencies in risk levels across batches. However, the levels of leachables detected in the non-PVC soft bags were found to be within the safety threshold, and cytotoxicity assessments consistently yielded negative results for leachables. Consequently, this study provides valuable data for conducting batch stability investigations concerning extractables in large volume parenteral drug delivery containers and other forms of pharmaceutical packaging.
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2023
·
IF 20.4
Yunjing Cao,Nan Li,Kai Yuan,Na Li,Wujiu Zhang,Shiyu Liang,Zhidong Hou,Da Lei,Ting Jin,Jian-Gan Wang,Keyu Xie,Chao Shen
Ni-rich (Ni≥0.8) LiNi x Co y Mn 1− x −y O 2 (NCM) cathode materials have attracted great interest for high-energy-density lithium ion batteries (LIBs). However, layered oxides of Ni-rich CAMs are suffering from the notorious structural and interfacial degradation in the liquid electrolyte , especially at high state-of-charge (voltage) and temperature, which leads to electrochemical performance deterioration and thermal runaway of the cell. This work systematically and comprehensively reveals the underlying mechanism of the electrolyte additive phenyl trifluoromethyl sulfide (PTS) to enhance the electrochemical property of Ni-rich layered oxides at high voltage (∼4.6 V) and high-temperature (∼50 °C). Specifically, PTS observably encourages the electrode stability via cathode-electrolyte interface strengthening and reactive oxygen species deactivating mechanism, which facilitates the NCM811 cathode to adapt to the deep charging state as well as the highly oxidized environment. The binding energy calculation results reveal that the superoxide radical could steadily adsorb on the S radical or Li + sites by interacting with Li + , thus making the superoxide radical deactivated. With the interface strengthening of PTS, the Ah-level NCM811||Gr pouch cell exhibits excellent cycling stability. This work affords a guide to designing electrolytes for Ni-rich LIBs towards high-voltage and high-temperature.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂离子电池
·
界面化学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Ben Li,Qi Wang
In this article, a novel U-tapered hollow-core fiber (HCF) surface plasmon resonance (SPR) biosensor coated with PtS 2 for early-stage gastric carcinoma (GC) diagnosis was demonstrated. The article proposed the first investigation to detect Interleukin-10 (IL10) and Interleukin-1β (IL1β) which were associated with the risk of developing gastric carcinoma, using optical fiber SPR technology. Herein, the sensitivity of sensor was effectively improved through a combination of tapered and U-shaped structures. Additionally, to further enhance the detection capability, two-dimensional material PtS 2 was utilized to increase the surface electric field intensity of the sensor. Simultaneously, optimization of structural parameters such as taper ratio, bending diameters, and Au film thickness was conducted. Ultimately, the designed sensor achieved a remarkable sensitivity of 13210 nm/RIU within the refractive index (RI) range of 1.33–1.37. The sensor demonstrated exceptional performance, achieving sensitivities of 3.64 nm/(ng/ml) and 7.46 nm/(ng/ml) for the detection of IL10 and IL1β biomarkers, respectively, along with limit of detection (LOD) of 2.74 pg/ml and 1.33 pg/ml, and successfully detecting the presence of these biomarkers in the serum of gastric cancer patients. Overall, the proposed sensor exhibits significant potential in early gastric cancer detection and advances the application of optical fiber SPR sensors in trace biodetection.
研究领域:
光纤技术
·
生物传感
·
癌症诊断
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）