INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
·
2019
·Vol. 55
·期 1
·192-200
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IF 2.281
Zhang Fangfang,Bai Xinpeng,Gao Wei,Guoding Wang,Zhenzhen Shi,Cao Jun
Summary This study investigated the effects of adding different concentrations of virgin coconut oil (VCO) on the optical, mechanical, thermodynamic and antimicrobial properties, as well as water vapour permeability and morphology of potato starch-based biodegradable films. Increasing VCO concentrations caused a rise in the light transmittance of the films from 2.13 to 4.79 mm −1 and a decrease in water vapour transmittance from 6.77 to 2.12 (10 −5 GPa −1 h −1 m −1 ). At a VCO concentration of 14 wt% (based on potato starch), the tensile strength reached its highest value (19.98 MPa). Scanning electron microscopy showed that the surface of the film became smoother as VCO concentration increased. The addition of VCO inhibited the growth of Listeria monocytogenes , Staphylococcus aureus and Escherichia coli . In conclusion, VCO supplementation improved the mechanical, antibacterial and water barrier properties of starch-based films. These results could expand the scope of the application of starch-based films in food packaging.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 5
·2101857
·
IF 6.389
Yinghao Zhang,Di Wen,Mengjia Liu,Yun Li,Yuan Lin,Kun Cao,Fan Yang,Rong Chen
Stretchable encapsulation plays a crucial role in expanding the applications of flexible electronics, particularly the large-area flexible displays. In this work, polydimethylsiloxane (PDMS) hybrid films with high stretchability, excellent transparency, and good barrier property are achieved by a simple process of SiO 2 doping and atomic layer infiltration (ALI). The doped SiO 2 improves the mechanical property and serves as reaction sites for the Al 2 O 3 infiltration. A clear “nucleation-filling-coating” mechanism of Al 2 O 3 ALI is proposed and elaborated in detail by in situ quartz crystal microbalance. The optimized PDMS hybrid films exhibit a relatively low water vapor transmission rate (WVTR) value of 1.81 × 10 −3 g m −2 day −1 and excellent mechanical reliability, where after 1000 cycles of the fatigue stretching test at 1% tensile strain the WVTR only slightly increases to 2.01 × 10 −3 g m −2 day −1 . Furthermore, the patterned quantum dots encapsulated with PDMS hybrid films still retain more than 50% photoluminescent intensity even after the stretching and storage in deionized water for 2400 h, which is ≈80 times longer than the pristine ones. Therefore, the proposed combined method of SiO 2 doping and ALI modification has great and practical implications for stretchable encapsulations for future flexible electronics.
研究领域:
材料科学
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柔性电子学
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 5
·3271-3284
·
IF 3.917
Li Wei,Wang Shuangfei,Wang Wei,Qin Chengrong,Wu Min
Abstract Due to energy crisis and environmental pollution, biopolymer-based packaging materials have been extensively investigated. Cellulose nanofibrils (CNFs), due to their good oxygen barrier performance and excellent mechanical as well as film-forming properties, have emerged as interesting packaging materials. However, the problem of the resulting films is the highly hygroscopic character of the cellulose fibers themselves, which would further lead to a decrease of the films’ mechanical and barrier properties. Herein, a facile preparation of hydrophobic CNF films was carried out by the attachment of 10-undecylenoyl chloride onto CNFs followed by vacuum filtration. The modified CNFs became thicker and rougher compared with the pristine CNFs and were easy to disperse in ethanol. The resulting CNF film showed a higher surface roughness and a tensile strength of (47 ± 4) MPa. Additionally, the modified CNF film was hydrophobic, leading to an obvious barrier improvement with the WVP value decreasing by 62.4% in comparison to the pristine CNF film. Since this hydrophobic CNF film is easy to prepare with a good vapor barrier property, it should be promising for packaging applications. Furthermore, the generated CNF film demonstrated good reactivity with thiol groups, which can be applied for further functionalization to enrich their application fields. Graphical abstract
研究领域:
材料科学
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包装工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Siyuan Liu,Panfu Cai,Xiaoxi Li,Ling Chen,Lin Li,Bing Li
To improve the water vapor resistance of starch-based films, Na-MMT (Na-montmorillonite) as nanofillers were fabricated into hydroxypropyl starch and the multi-scale structural changes (including intermolecular interaction, short-range conformation, long-range ordered structure and the aggregated structure of the film) were revealed. The elongation of the water vapor molecule pathway by tortuous path is generally recognized as the main reason for the improvement of water resistance. However this study observed the lowest water vapor permeability (WVP) was at the 3% Na-MMT/hydroxypropyl starch (HPS) ratio instead of 5% even nanofillers were partially exfoliated at both ratio. Except for the “tortuous path” caused by nanofillers, this observation proposed that the short-range conformation of HPS chains, long-range ordered structure and the aggregated structure likely influenced the water barrier property. The relationship between WVP and multi-scale structure of the film was investigated. The results suggested that a good balance of short-range conformationin the amorphous region, long-range ordered structure and the aggregated structure of the film was required for the improvement of water vapor barrier property.
研究领域:
材料科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Li Yang,Yichen Yang,Ying Yang,Kaiwen He,Guangyang Jiang,Yongqiang Tian
In this work, a straightforward approach utilizing distillers' grains (DG) waste and sodium alginate (SA) was developed to prepare functional and bioactive packaging films. Deep eutectic solvents (DESs) were initially synthesized from choline chloride (CO), betaine (BO), glycerol (GO), and oxalic acid . Composite films were then prepared from DES-treated DG slurry and SA at different ratios. Characterization and analysis revealed that adding 75 % CO-treated DG slurry reduced the water vapor permeability (WVP) by over 66 % compared to that of the SA film. Composite films containing CO/BO-treated DG slurry had an ultraviolet light barrier rate exceeding 99 %, while those with 75 % DES-treated DG slurry demonstrated excellent antioxidant activity , with a 2,2′-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) free radical scavenging rate of 80.14 %–88.35 %, representing a 322.45 %–365.73 % increase compared to that of the pure SA film. These composite films also exhibited favorable mechanical properties (31.58 MPa, 5.53 % EB), thermal stability , and biodegradability , extending the shelf life of grapes by 1.8 times. In conclusion, bioactive composite films derived from DES-treated DG are expected to replace petroleum-based plastics, enhancing sustainable biomass use and environmental responsibility.
研究领域:
食品科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Liucheng Meng,Zifei Yan,Wen Deng,YanLing Lou,Lei Zhang,Zhaoyang Xu,Huining Xiao,Weibing Wu
The potential environmental and health hazards of packaging materials based on petrochemical polymers have prompted a shift in research toward biodegradable polymers. However, most biodegradable films have poor water vapor barrier properties. We proposed an environmentally friendly method based on salting-out and cyclic freezing-thawing effects to improve the water-resistance and water vapor barrier properties of carboxymethyl cellulose (CMC)-based films. The coexistence of hydroxyl ( OH) and carboxyl ( COOH) was found to be crucial in promoting the ice-induced crystallization of cellulose molecules. The calculations of ice crystal size and freezable water weight content as well as hydrogen bonding theory analysis proved that the COOH can enhance the polymer interactions and crystallization to resist water molecules. The water vapor permeability (WVP) is as low as 3.89 × 10 −11 g·m/m 2 ·Pa·s at 37 °C and 65 % RH, a 6-fold reduction compared to the untreated CMC film. Meanwhile, the CMC-based films have high water resistance and mechanical strength, with a maximum wet tensile strength of 14.96 MPa, and remain intact after two months of immersion in water. This strategy is of great significance for the development of sustainable packaging materials with high barrier properties.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2024
·
IF 4.1
Jing Xu,Pingbo Zhang,Mingming Fan,Pingping Jiang,Shijun Chen,Xunxun Sheng
To improve the weak interaction between poly (butylene adipate‐co‐terephthalate) (PBAT) and poly (lactic acid) (PLA) blends, this study added modified metal-organic frameworks (MOFs) to enhance the interfacial bonding strength between PBAT and PLA. MOF-5 nanoparticles were synthesized by room temperature synthesis and modified with KH-560. PBAT/PLA/KH-560@MOF films were prepared by solvent casting. The microscopic morphology, mechanical properties, thermal properties, hydrophobicity, water vapor transmission rate and antimicrobial properties of the composite films were investigated. The results showed that KH-560@MOF nanoparticles were uniformly dispersed in the polymer matrix of PBAT and PLA, reducing phase interface defects. Mechanical properties of PLA/PBAT improved in the presence of KH-560@MOF. The breaking elongation and tensile strength values were maximized when adding 1 wt% KH-560@MOF. Doping of KH-560@MOF improves hydrophobicity and water vapor transmission rate of films. Zn 2+ in MOF-5 imparts antimicrobial properties to the film, showing antimicrobial activity against both Gram-positive and Gram-negative food-borne pathogens (i.e., E. coli and S.aureus ). This work enriched the design of compatibilizer for the PLA/PBAT blend and provided a novel approach for expanding the application of MOFs.
研究领域:
材料科学
·
生物学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD HYDROCOLLOIDS
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2011
·
IF 2.659
Changdao Mu,Jimin Guo,Xinying Li,Wei Lin,Defu Li
Glycerol-plasticized gelatin edible films with a new kind of dialdehyde polysaccharide , dialdehyde carboxymethyl cellulose (DCMC) as crosslinking agent are successful prepared using casting techniques. The mechanical properties, thermal stability, light barrier properties, swelling behavior as well as water vapor permeability (WVP) of the gelatin–DCMC films are investigated. The results indicate that the addition of DCMC causes tensile strength (TS) and thermal stability to increase and elongation at break (EB) to decrease, suggesting the occurrence of crosslinking between gelatin and DCMC. The light barrier measurements present high values of transparency at 280 nm and low values of transparency at 600 nm of the gelatin–DCMC films, indicating that gelatin–DCMC films are very transparent (lower in transparency value) while they have excellent barrier properties against UV light. Moreover, the values of transparency at 280 nm increase with the increased DCMC and glycerol content, suggesting the potential preventive effect of gelatin–DCMC films on the retardation of product oxidation induced by UV light. Furthermore, the addition of DCMC can greatly decrease the water vapor permeability (WVP) and equilibrium swelling ratio (ESR) down to values about 1.5 × 10 −10 g m/m 2 s Pa and 150%, revealing the potential of DCMC in reducing the water sensitivity of gelatin-based films. In common for hygroscopic plasticizer in edible films, the addition of glycerol gives increase of EB and WVP and decrease of thermal stabilities and ESR of the gelatin–DCMC films.
研究领域:
食品科学
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材料科学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
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2022
·
IF 6.056
Fei-Fan Shuang,Chen-Man Zong,Chen-Chen Wang,Run-Ze Hu,Yu-Shi Shen,Yu-Xiong Ju,Xiao-Hui Yao,Tao Chen,Wei-Guo Zhao,Dong-Yang Zhang
Water loss is a significant factor in fruit deterioration, and edible films offer a promising method to prevent this. Herein, a silk fibroin (SF)-based edible film reinforced by cellulose nanocrystals (CNCs) and chlorogenic acid (CGA) was developed. CNCs and CGA promote the formation of hydrogen bonds and β-sheets, thereby enhancing hydrophobicity and minimizing water vapor permeability (WVP). Compared with those of pure SF film (water contact angle: 80.3°; WVP: 2.235 × 10 −10 g Pa −1 s −1 m −1 ), the water contact angle of the composite film increased to 90.1° and its WVP decreased to 1.246 × 10 −10 g Pa −1 s −1 m −1 . Moreover, the tensile strength (27.05 MPa) and Young's modulus (836.53 MPa) of the composite film also increased. Additionally, the antimicrobial activities of the composite film against Escherichia coli and Staphylococcus aureus were 99.66% and 91.07%, respectively. Furthermore, it inhibited the germination of fungal spores ( Rhizopus stolonifer ). Accordingly, the composite film increased the shelf life of strawberries to 15 d, which is longer than that with other reported films. This study provides an excellent strategy for producing antimicrobial fruit preservation films with high hydrophobicity and low WVP.
研究领域:
食品科学
·
材料科学
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2023
·
IF 6
Zexin Zhao,Yuan Xu,Pengpeng Zou,Long Xu,Jun Cai
Polyvinyl alcohol (PVA) is a widely used biodegradable material, but its high solubility and water vapor permeability limit its applications in food packaging. To address this issue, bilayer films were developed based on the combination of blending and coating techniques in the study, which consisted of an inner pachyman (PM)/PVA blend layer and an outer polylactic acid (PLA) layer. Blending PVA with PM reduced the solubility and oxygen permeability of the film, and the blend matrix showed rapid self-healing capabilities. Loading of a thin PLA shell onto the PM/PVA layer improved the water resistance, tensile strength, stiffness and water vapor barrier of the developed bilayer films. The best overall performance of the bilayer film was achieved using 40 g/L PLA as the film-forming solution. Infrared spectroscopic and microscopic structure analysis revealed weak interfacial interaction of the bilayer film. Furthermore, this bilayer film showed a better preservation effect on cherry tomatoes compared with PVA, polyethylene, and PM/PVA films. The physicochemical quality of fruits could be effectively preserved for at least 10 days under ambient environment. It is anticipated that the bilayer film developed here serves as a promising candidate for food packaging materials to extend the shelf life.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Qing Zeng,Chongshan Yin,Xi Li,Chunqing He
The wide distribution of the lateral size of lab-prepared graphene oxide (GO) sheets often complicates the measurement of accurate average size. Herein, a series of reduced-GO/polyethyleneimine (RGO/PEI) composite membranes with compact brick-wall structures were successfully prepared. The large lateral size of RGO sheets in the membrane benefited gas barrier properties, including oxygen, nitrogen, and water vapor. The RGO sheets acted as impermeable inorganic filler to prolong the diffusion path, forcing gas molecules to wiggle through the permeable and tortuous channels of the PEI/water mixture. The water vapor transmission rate of RGO/PEI composite membranes was relatively high, and a linear correlation was established between the length of PEI/water channels and the water vapor barrier property. The length of PEI/water channels under the same membrane thickness was determined by the lateral size of RGO sheets. Therefore, the statistic averages of lateral size of RGO sheets (from 2 . 48 μ m to 44 . 35 μ m ) showed a linear correlation with the water vapor barrier property, as confirmed by the positron annihilation technique and molecular dynamics simulations. In sum, the linear correlation could be used to practicably measure the statistic averages of lateral size of GO sheets according to water vapor permeability measurements.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Bunan Wu,Somia Yassin Hussain Abdalkarim,Zhijiang Li,Weidong Lu,Hou-Yong Yu
The environmental challenges linked to petroleum-based polymers have accelerated the search for alternative materials like polylactic acid (PLA). Diverse nanofillers, ranging from inorganic to organic and hybrid inorganic/organic varieties, are employed to bolster PLA performance. Yet, non-synergistic nanofillers often underperform due to inadequate dispersion and singular functionality within the PLA matrix. This work introduces carbonized cellulose nanocrystals (GCNC) with rod-like (R-GCNC) and spherical structures (S-GCNC), as synergistic reinforcements for PLA matrix. Unlike traditional nanofillers, the highly graphitized carbon layer on GCNC effectively mitigates CNC agglomeration while preserving cellulose morphology, fostering improved interfacial interactions and hydrogen bonding within PLA matrix. Moreover, GCNC acts as a nucleating agent, boosting the crystallization rate of PLA and enhancing its mechanical properties. Remarkable synergistic reinforcing effects of GCNC on PLA performances were observed. Particularly, the tensile strength of R-GCNC 5 % and S-GCNC 5 % composites surged by 93 % and 76 %, elongation at break increased by 29.4 % and 33.3 %, Young's modulus rose by 37 % and 18 %, and cold crystallization temperature decreased by 11.5 °C and 12.9 °C. Additionally, the GCNC/PLA composites exhibited exceptional thermal stability, UV resistance, and water vapor permeability reduced by 46 % for R-GCNC, and 35 % for S-GCNC, making them promising for industrial and sustainable packaging.
研究领域:
材料科学
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环境科学
✓ 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）