FOOD CHEMISTRY
·
2024
·
IF 8.5
Jian Hu,Xueyan Yun,Yan Zheng,Tao Sun,Lijun Song,Pengju Pan,Tungalag Dong
High costs and low performance have constrained the application of bio-based materials in food packaging. Herein, a series of ultra-thin poly(L-lactic acid-iconic acid N-diol) (P(LA-NI)) copolymer films were developed using a “one-step” polycondensation process with integrated toughness, barrier properties, gas selectivity, and quality control features. The massive branched structure and gg conformers in P(LA-NI) act as “internal chain expansion” and “internal plasticization”. Meanwhile, P(LA-NI) contains numerous polar groups and unique nanoscale microphase structures to realize excellent CO 2 , O 2 barrier, CO 2 /O 2 selectivity, anti-fogging, and UV shielding functions. The atmosphere within the package spontaneously achieves the desirable low O 2 and high CO 2 levels when packaging button mushrooms with high respiratory metabolism. Eventually, the shelf life of button mushrooms reached 24 days, >3-fold extended. This PLLA-based film meets “dual carbon” and “food safety” goals and has vast potential for fresh food preservation.
研究领域:
食品科学
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材料科学
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生物工程
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Xinru He,Zhanpeng Zhang,Xuan Xuan,Tingyuan Tan,Jiaxuan Sun,Biao Wang,Yu Tian,Heng Chen
The application of chitosan in packaging has always been limited due to its brittle and hygroscopic nature. In this study, hydrophobic short-chain fatty acids (SCFAs) were utilized to modify chitosan to overcome this issue. For the first time, hydrophobic SCFAs, typically hexanoic acid and its homologs, were found to be able to dissolve chitosan in water as well as its hydrophilic analog. After water was removed through evaporation, hydrophobic SCFA-modified chitosan films were obtained. The results of mechanical testing and DSC analysis confirmed that these hydrophobic SCFAs could effectively plasticize the chitosan film. Moreover, water contact angle measurements revealed that the hydrophilicity of these plasticized chitosan films was significantly reduced. The findings from the moisture uptake experiments indicated that linear hydrophobic SCFAs reduced the hygroscopicity of the chitosan film. Additionally, the crystal structures, thermal and gas barrier properties, and antibacterial activities of these hydrophobic SCFA-modified films were systematically examined and compared with those of hydrophilic SCFA-modified chitosan. This study presents an innovative and practical method for modifying chitosan films by regulating the structure of the cosolvent, thereby facilitating the real-world application of chitosan-based food packaging materials.
研究领域:
材料科学
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食品科学
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生物化学
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产品关联
DOI
PubMed
高影响因子
Foods
·
2023
·Vol. 12
·期 14
·2794
·
IF 5.2
Shushan Gao,Chonghao Zhu,Liangfei Ma,Chenghai Liu,Hongqiong Zhang,Shengming Zhang
To reduce the usage of petroleum-based plastic products, a lignin-based film material named aminated lignin/Fe(III)/PVA was developed. The mixture of 8 g lignin, 12 mL diethylenetriamine, 200 mL NaOH solution (0.4 mol·L−1), and 8 mL formaldehyde was heated at 85 °C for 4 h; after the aminated lignin was impregnated in the Fe(NO3)3solution, a mixture of 3 g aminated lignin/Fe(III), 7 g PVA, and 200 mL NaOH solution (pH 8) was heated at 85 °C for 60 min; after 2 mL of glycerin was added, the mixture was spread on a glass plate to obtain the aminated lignin/Fe(III)/PVA film. This film demonstrated hydrophobicity, an UV-blocking function, and a good slow-release performance. Due to the formation of hydrogen bonds between the hydroxyl groups of lignin and PVA, the tensile strength, the elongation at break, and the fracture resistance of the film were 9.1%, 107.8%, and 21.9% higher than that of pure PVA film, respectively. The iron content of aminated lignin/Fe(III)/PVA was 1.06 wt%, which mainly existed in a trivalent form. The aminated lignin/Fe(III)/PVA film has the potential to be used as a food packaging material with anti-ultraviolet light function and can also be developed as other packaging materials, such as seedling bowls, pots for transplanting, and coating films during transport.Keywords:lignin;polyvinyl alcohol;Fe(III);packaging material;slow-release function
研究领域:
材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL POLLUTION
·
2023
·
IF 8.9
Qiji Zhang,Liu Liu,Yue Jiang,Yan Zhang,Yifan Fan,Wenxin Rao,Xin Qian
Microplastics can be found almost everywhere and extensively expose to human. Infants are vulnerable, and the potential risks of microplastics may be greater for infants, however, infants' microplastic exposure is still poorly understood. Since milk powder makes up a significant portion of many infants’ diets, we investigated microplastic pollution in infant milk powder and calculated the microplastic exposure from milk powder, feeding bottles and milk powder preparation. On one hand, we studied 13 different types of milk powder with different packaging, processing systems, and milk sources. The boxed milk powder (7 ± 3 items/100 g) was more polluted with microplastics than the canned milk powder (4 ± 3 items/100 g). The inner packaging of the boxed milk powder was plastic and aluminum foil laminated, it emitted 8 ± 2 to 17 ± 1 items/100 g of microplastics, and might be a main source of microplastics in boxed milk powder. On the other hand, we found that when infants consume milk powder, the microplastic exposure from milk powder itself is little, exposure from feeding bottles is 6.8 times higher than that from milk powder and milk powder preparation is 1.7 times higher.
研究领域:
环境科学
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公共卫生
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儿科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
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2024
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IF 4.7
Xu Haoming,Cheng Zhengzai,Djouonkep Lesly Dasilva Wandji,Gauthier Mario,Zuo Yingzi,Tang Wei,Xiang Leyang
The packaging industry faces a shortage of high-strength bio-derived polyesters that can rival polyethylene derivatives, resulting in the overexploitation of fossil resources. By condensing lignin-derived 2-methoxyhydroquinone with methyl 4-chloromethyl benzoate, the diester dimethyl 4,4’-(((2-methoxy-1,4-phenylene)bis(oxy))bis(methylene))dibenzoate (M) was synthesized. Using monomer M and hydroquinone hydroxyethyl ether, aliphatic-aromatic copolyesters P 1 -P 4 were prepared via melt polycondensation reaction employing various aliphatic diacids (1,4-butanedioic acid, 1,6-hexanedioic acid, 1,8-octanedioic acid, and 1,12-dodecanedioic acid). The chemical structures of the copolyesters were elucidated using FTIR and 1 H NMR, while their properties were characterized through gel permeation chromatography, differential scanning calorimetry, thermogravimetric analysis, tensile testing, and dynamic mechanical analysis. GPC analysis revealed that the average molecular weight (M w ) of copolyesters P 1 –P 4 ranged from 4.22 to 5.03 × 10 4 g/mol, while thermal property analysis indicated that the copolyesters thermal stability decreased with increasing aliphatic diacid spacer length unit. Also, the glass transition temperature (T g ) and melting point (T m ) decreased from 90 to 68 °C and 182–158 °C, respectively. Mechanical analysis showed a decrease in tensile modulus from 1740 to 1010 MPa, as well as yield strength from 76 to 54 MPa, but indicated an increase in elongation at break from 236 to 295%, owed to the growth of carbon chains which increases the proportion of flexible units in the polymer chain. The degradability study indicated a modest degradation rate from 3.9 to 5.1% after 30 weeks from P 1 –P 4 , with low ecotoxicity in all cases. P 4 , consisting of 1,12-dodecanedioic acid, exhibited the highest degradation rate, due to its low proportion of benzene units. These findings provide insights into the structure-property relationships of aliphatic-aromatic copolyesters while contributing to the advancement of high M w polyesters with performance comparable to conventional petroleum-derived polyesters, aligning with the strategy of green low-carbon, energy-saving, reduction, and sustainable development of polymeric materials.
研究领域:
材料科学
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绿色化学
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2021
·
IF 9.381
Bin Gu,Qimeng Jiang,Bichong Luo,Chuanfu Liu,Junli Ren,Xiaohui Wang,Xiaoying Wang
Bacterial breeding is the main cause of food perishability, which is harmful to human health. Silver nanoparticles (AgNPs) are one of the most widely used antimicrobial agents, but they are easy to release and cause cumulative toxicity. In this work, with corn stalk as green reductant and GO as template, a simple electrostatic self-assembled sandwich-like chitosan (CS) wrapped rGO@AgNPs nanocomposite film (CS/rGO@AgNPs) was synthesized to achieve stabilizing and controlled-release of AgNPs. The results showed that the the CS/rGO@AgNPs film continued releasing AgNPs for up to 14 days, and the final release amount of silver nanoparticles was only about 1.9 %. More importantly, the nanocomposite film showed durable antibacterial effect and good antibacterial activity against E. coli and S. aureus, and they showed no toxicity to cells. Hence, the nanocomposite film has potential application as an effective and safe packaging material to prolong the shelf life of food products.
研究领域:
食品科学
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材料科学
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微生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2022
·Vol. 57
·期 19
·8687-8700
·
IF 4.682
Zhang Nan,Zhao Man,Liu Guangfa,Wang Jiaoyang,Chen Yunzhi,Zhang Zhengjian
A green modification method for effectively enhancing toughness of PLA was established. Herein, alkaline lignin (LG) was firstly alkylated with dodecane, and then grafted with lactide (LA). The alkylated lignin-lactide graft copolymer (GLG-g-LA) was obtained via ring-opening polymerization (ROP). GLG-g-LA copolymer can be utilized as a functional filler to toughen polylactic acid (PLA) packaging film. The 31 P-NMR of alkylated lignin (GLG) demonstrated that the peak of phenolic hydroxyl groups disappeared completely, while the relative peak intensity of carboxyl hydroxyl groups decreased significantly. The grafting rate of GLG-g-LA copolymer was improved more than twice times compared with lignin-lactide graft copolymer (LG-g-LA). Then LG-g-LA and GLG-g-LA copolymer were mixed with PLA to prepare different PLA composite films via casting method, respectively. Particularly, the elongation at break of PLA/GLG-g-LA2 composite film increased to 41.98%, which was more than 20 times higher than PLA. In general, PLA/GLG-g-LA composite film with toughness, excellent UV barrier, water resistance and controllable gas permeation could be used as high-performance and biodegradable materials in packaging field.
研究领域:
材料科学
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绿色化学
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高分子化学
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产品关联
DOI
高影响因子
Journal of Natural Fibers
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2022
·
IF 3.507
R. K. Gond,M. K. Gupta
The non-biodegradability of the packaging materials made from plastic causes harmful effects on the environment and human health. Nanocellulose, starch, chitosan in native and modified forms derived from natural resources can be potential reinforcements for the packaging materials. Nanocellulose from sugarcane bagasse was obtained through a combination of chemical treatments and mechanical grinding process and then incorporated in different amounts to poly lactic acid (PLA) to prepare nanocomposite films by the solvent casting method. The prepared films were characterized by X-ray diffraction (×RD), Fourier-Transform infra-red spectroscopy (FTIR), Atomic force microscopy (AFM), penetration resistance, optical and barrier properties. The incorporation of nanocellulose significantly influenced the crystallinity and barrier properties of the films. Enhancement in the hydrophobic nature and penetration resistance was also seen for the PLA-based nanocomposite films. The experimental results proved that the present films can be utilized in food packaging and other packaging applications as well.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
APPLIED ENERGY
·
2019
·
IF 8.426
Weifang Han,Chunhua Ge,Rui Zhang,Zhiyan Ma,Lixia Wang,Xiangdong Zhang
The utilization of phase change materials (PCMs) for solar energy storage and industrial waste heat recovering is essential to protect the environment and build sustainable energy infrastructure in the coming years. The low thermal conductivity, leakage of the liquid-state and poor shape stability limited their broader application in energy conversion and storage. Here, construction of boron nitride foams (BNFs) is used as the packaging materials for PCMs. The BNFs with high porosity (∼97.6%) and low density (∼1.7 mg/cm 3 ) provide sufficient space for the adsorption of PCMs. Eutectic hydrate salt (EHS) is restricted in the pores of BNFs by the weak interactions which is proved by FTIR, XRD and Raman spectroscopy. In addition, the EHS/BNF composite PCMs exhibit low supercooling degree and high latent heat when compare with the EHS/polymer. Thermal conductivity of EHS/BNF composite PCMs with 4 wt% BNFs is 10.37 times higher than that of the pure PCMs and 2.24 times higher than for EHS/polymer. Especially, shape-stability and thermal reliability are still maintained after 100 thermal cycles. These results demonstrate that BNFs can be used as a promising candidate to replace polymers for energy conversion and storage field.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Heliyon
·
2024
·
IF 3.4
Yanhua Sheng,Jinxu Dong,Rui Wang,Yikai Wang,Xin Huang,Changbao Chen
Schisandra chinensis is a functional fruit with tonic effect and was widely used by traditional Chinese medicine for treatment and health care. The quality of Schisandra chinensis fruit may vary by different storage condition. In this study, the influence of ambient temperature, humidity, packaging materials and period of storage on the quality of Schisandra chinensis fruits were investigated. The contents of main active components lignans and organic acids were simultaneously determined by ultra-performance liquid chromatography coupled to quadrupole electrostatic field orbitrap high resolution mass spectrometry (UPLC Orbitrap HRMS). The antioxidant activity was determined using DPPH radical scavenging capacity, ABTS + inhibition rate and FRAP value. The correlation of multicomponent and antioxidant activity was analyzed by grey relevance analysis. Taking the changes of multicomponent and antioxidant activity as investigation index, Schisandra chinensis fruits under different storage conditions was comprehensively evaluated. Schisandrol A, malic acid, sorbic acid, schizandrin A, schizandrin B, and schisandrol B were the main effective components of antioxidant activity. Ambient temperature at 5 °C and humidity at 40 % were more suitable for Schisandra chinensis fruits and kraft paper bag was better packaging material. Do not exceed 1 year was the effective storage period. For the safety evaluation, no aflatoxin was detected within the storage period of 2 years, demonstrated the storage was satisfactory. This study provided a reference for the high-quality storage and standardized operating procedures for storage of Schisandra chinensis fruits.
研究领域:
中药学
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食品科学
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植物化学
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DOI
高影响因子
CELLULOSE
·
2024
·Vol. 31
·期 17
·10445-10462
·
IF 4.9
Li Qiang,Jiang Xiaofan,Huang Mingjun,Lv Jiachen,Ling Zhe,Wang Songlin,Chen Fushan,Ji Zhe
Unbiodegradable petroleum-based packaging materials have posed a significant threat to the environment and human health, forcing the exploration of alternatives. Inspired by the charge-secreting layer of Sandcastle worm and the asymmetric wettability of lotus leaf, we successfully developed a dual biomimetic cellulose-based packaging material (CW@(CT) 10 ). This material was achieved through an electrically charge-controlled layer-by-layer self-assembly of chitosan and titanium dioxide nanoparticles (TiO₂ NPs), followed by functionalization with carnauba wax (CW). The material achieved commendable mechanical properties and abrasion resistance, rendering it highly stable and durable. Benefitting from the rough surface with nanostructures and low surface energy, the CW@(CT) 10 showed a high water contact angle of 152.14°. The superhydrophobic surface reduced the bacterial adhesion, which integrated with the electropositivity of chitosan, endowing the materials with a 100% antibacterial ability to Staphylococcus aureus and Escherichia coli . Fruit antimicrobial tests and degradation studies in the natural environment demonstrated that CW@(CT) 10 kept fruit bacteria-free for 5 days and were completely biodegraded within 100 days. Notably, this work introduced a facile strategy for scalable production of a sustainable, inexpensive, durable, and environmentally friendly material, showcasing immense potential applications in food packaging. Graphical abstract
研究领域:
材料科学
·
环境科学
·
生物学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Fan Zhao,Lijun Jiang,Chenyu Wang,Shuangdie Li,Di Sun,Qingbao Ma,Zhongjie Yu,Yu Liu,Wei Jiang
This study aimed to prepare a heat-sealable, water-soluble, edible film based on pullulan (PUL)/soluble soybean polysaccharide (SSPS) for the portable packaging of convenience foods. The effects of the PUL/SSPS ratios on the microstructure, physicochemical properties, barrier properties, and mechanical properties of the PUL/SSPS films were explored. Fourier-transform infrared spectroscopy and X-ray diffraction showed an apparent hydrogen bonding interaction between SSPS and PUL in the PUL/SSPS films. As the SSPS proportion in the PUL/SSPS films increased, the water contact angle, moisture content, water vapor permeability, solubility, oxygen permeability, flexibility, and antioxidant activity increased, whereas light transmittance decreased. The heat-seal strength of the P9S1 film (PUL/SSPS ratio of 9:1) is slightly lower than that of the PUL film ( p > 0.05). Furthermore, the application potential of the PUL/SSPS films for packaging peptide powder was evaluated. The P9S1 film exhibited a satisfactory packaging effect and was completely dissolved in water with low turbidity. Therefore, the P9S1 film is a promising packaging material for convenient powdered foods.
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
危险品化学品经营许可证（带存储）