ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
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2024
·Vol. 31
·期 23
·34159-34169
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IF 0
Cao Yu,Zhong Zehui,Zeng Fanqi,Zhou Yang
To ensure the safety of food contact materials, a liquid chromatography method was established to determine the migration of formaldehyde in paper packaging with various food simulants (10%, 25%, 50%, 75%, and 95% ethanol by volume) and to investigate the migration behavior of formaldehyde after various durations and with various materials. The results showed that the method has good linearity with a correlation coefficient of R 2 > 0.9990, a detection limit of 0.0011 ~ 0.0027 mg L −1 , and a spiked recovery of 89.7 ~ 103.2% in the range of formaldehyde determination; the migration of formaldehyde in all six paper contact materials showed a trend of gradual increase with time until equilibrium was reached. At the same time and temperature, the migration of formaldehyde in paper packaging was the highest in low-concentration ethanol. With the same food simulants and materials, the maximum migration of formaldehyde in printed materials was greater than that in nonprinted materials; with different materials and the same food simulant, the thickness value was higher, with the use of water-based ink as a printing material, and the maximum migration value of formaldehyde by offset printing technology was low.
CAS / MDL:
研究领域:
食品安全
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分析化学
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材料科学
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产品关联
DOI
PubMed
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Haixu Wang,Ying-An Mai,Wenlian Qiu,Weifeng Liu,Dongjie Yang,Zhiqiang Fang,Xueqing Qiu
Degradable paper-based packaging materials are promising alternatives to plastic packaging. However, the inherent limitations of paper, such as poor water and oil resistance, restrict its broader applications. It is essential to develop green and degradable coatings to compensate for the shortcomings of paper materials. In this study, we prepared a tough, hydrophobic, stain-resistant, and degradable lignin-based waterborne polyurethane (LWPU) for a paper packaging coating. LWPU emulsions with good stability were synthesized using low-molecular-weight lignin (LMWL) and polycaprolactone diol (PCL) as raw materials and poly(dimethylsiloxane) (PDMS) as a modifier. LWPU films exhibited excellent mechanical properties, with the optimal tensile strength of 40.3 MPa and elongation at break of 1148%, hydrophobicity, antiaging properties, and UV shielding. The mechanical properties of the coated papers were significantly affected by the emulsion permeation and the type of paper substrate. The dense LWPU coating enhanced the barrier performance of the paper against water, oil, and gas. Incorporating PDMS segments into the coating further improved the hydrophobicity and stain resistance of the paper, allowing for easy removal of common stains. Moreover, the coating can be completely removed from the paper using solvent-dissolving and chemical degradation methods, which is advantageous for paper recycling. This work provides a reference for the industrial application of LWPU emulsions as green paper coatings.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
·
IF 6.953
Huihui Xie,Hui Zhang,Xinxin Liu,Shenglong Tian,Yunsi Liu,Shiyu Fu
A lignin-based PU coating was prepared for paper-based green packaging. Two representative diisocyanate were used to prepare the coatings. Due to the rigid aromatic, the physical properties of the TDI system reached the maximum below the lignin content of 40%. The HDI that contains flexible aliphatic chains alleviated the brittleness of coating, and it showed physical advantages when the lignin content was more than 50%. Owing to the high lignin content, the coating presented enhanced thermal stability . After coated with the lignin-based PU coatings, the dry tensile strength of coated paper was improved by 126%. Amazingly, the wet strength was increased from 0.31 to 12.6 MPa with an improvement nearly 40 times. Based on the coordination of lignin, Ag + was introduced into the PU matrix, which imparted the coating with excellent antibacterial ability. The colony forming units of E. coli and S. aureus were both less than 1. However, no inhibition halo was observed, which indicated that the Ag was firmly anchored on the coating and the antibacterial ability is only available when the bacterial contact the coating surface. The lignin-based PU coating with favorable sustainability and properties shows great potential in paper-based green packaging fields.
研究领域:
材料科学
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环境科学
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生物学
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产品关联
DOI
PubMed
高影响因子
Food Packaging and Shelf Life
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2022
·
IF 8.749
Yi-Cai Zhang,Qin-Bao Lin,Huai-Ning Zhong,Ying Zeng
Headspace solid-phase microextraction coupled with gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to analyze volatile flavor compounds of yogurt packaged in carton. Volatile flavor compounds of off-flavor yogurt were compared with that of fresh milk, unpackaged yogurt, non-off-flavor yogurt, and its packaging materials. Furthermore, volatile flavor substances from paper packaging materials were analyzed by migration assay. Principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA) were used to describe the changes of volatile compounds in different kinds of yogurt and to identify the potential markers associated with the off-flavor of yogurt. A total of 30 volatile flavor compounds were identified in two kinds of off-flavor yogurt. Importantly, three flavor compounds: Nonanal, 2-ethyl-1-hexanol, and d-limonene were not only detected in off-flavor yogurt, but also in paper packaging materials, which indicated that these substances from paper packaging materials have a certain contribution to off-flavor yogurt. Migration assay combined with VIP values showed that ethanol and ethyl acetate contributed can be considered as the other indicators for the monitoring of yogurt quality.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 9
·1746
·
IF 4.967
Jinwei Zhao,Zhiqiang Gong,Can Chen,Chen Liang,Lin Huang,Meijiao Huang,Chengrong Qin,Shuangfei Wang
Paper packaging materials are widely used as sustainable green materials in food packaging. The production or processing of paper materials is conducted in an environment that contains organic chlorides; therefore, potential food safety issues exist. In this study, the adsorption behavior of organic chlorides on paper materials was investigated. Chloropropanol, which has been extensively studied in the field of food safety, was employed as the research object. We studied the adsorption mechanism of chloropropanol on a crystalline nanocellulose (CNC) model. The results demonstrated that physical adsorption was the prevailing process, and the intermolecular hydrogen bonds acted as the driving force for adsorption. The adsorption effect assumed greatest significance under neutral and weakly alkaline conditions. A good linear relationship between the amount of chloropropanol adsorbed and the amount of CNC used was discovered. Thus, the findings of this study are crucial in monitoring the safety of products in systems containing chloropropanol and other chlorinated organic substances. This is particularly critical in the production of food-grade paper packaging materials.Keywords:paper packaging;chloropropanol;crystalline nanocellulose;adsorption kinetics;quartz crystal microbalance
研究领域:
材料科学
·
食品安全
·
环境化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Li Zhao,Kangting Du,Mei Huang,Dong Tian,Jinsong He,Yongjia Lei,Yan Liu,Guochun Lv,Jianmei Zou,Fei Shen
Recycling paper packaging waste into Fe-biochar catalysts is a promising strategy for resource utilization. In this study, a dissolution-regeneration method using a DMAc/LiCl system was employed to synthesis Fe-biochar pellet catalyst (Fe-WPBC) with corrugated cardboard as a cheap carbon precursor. The Fe-WPBC possessed a spherical cage-like hollow structure with millimeter-size dimensions, making it suitable for practical application. An impressive rate constant of 0.2452 min -1 for tetracycline degradation via peroxymonosulfate activation was achieved, and Fe-WPBC showed high stability, maintaining close to 100% tetracycline removal efficiency even after five cycles. Mechanistic insights were obtained through radical quenching, electron paramagnetic resonance, and electrochemical analysis etc. Both electron transfer path and SO 4 · - and O 2 · - dominated radical path concurrently existed. Possible degradation pathways were further proposed in combination with LC-MS and DFT calculations. Besides, toxicity simulations using T.E.X.T and ECOSAR programs showed that the degradation intermediates were less toxic than tetracycline. Finally, the practical application potential of Fe-WPBC was evaluated through a continuous flow reactor, which achieved a 99% tetracycline degradation efficiency and maintained over 400 min. This study provides new insights into both the recycling of paper packaging waste and the development of pellet catalysts for pollution degradation.
研究领域:
环境科学
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催化材料
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污染控制
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产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2019
·
IF 6.044
Hui Li,Yunqing He,Jin Yang,Xin Wang,Tianqing Lan,Lincai Peng
We presented a facile method for preparing a food-safe superhydrophobic packaging paper with improved moisture and air barrier properties in this study, which is combining construction of polymer-nanoclay hybrid multilayers with subsequent carnauba wax treatment. The polymer-nanoclay hybrid multilayers consisting of quadlayers of carrageenan (CR)/chitosan (CS)/montmorillonite (MMT)/CS were created using layer-by-layer (LbL) assembly. The surface chemical compositions, potentials and morphologies of the CR/CS/MMT/CS multilayer-modified paper samples were investigated. The paper sample modified with a wax-treated (CR/CS/MMT/CS) 2 multilayer gave a water contact angle of 151.4°. Compared with original paper, this superhydrophobic paper sample showed comparable tensile strength and excellent barrier properties against water vapor and air. Moreover, the obtained paper was used for strawberries packaging at ambient temperature, and it was very effective at reducing the weight loss and maintaining titratable acidity compared with the unpackaged strawberries, which might has a great potential as food packaging materials.
研究领域:
材料科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2020
·Vol. 10
·期 11
·1032
·
IF 2.436
Chengrong Qin,Wei Wang,Wei Li,Song Zhang
Paper packaging materials have been widely applied in our daily life. To maintain the quality of packed goods as well as the mechanical property, there is a need to enhance the paper water vapor barrier function. Although long-chain cellulose esters with saturated aliphatic chains have been employed as barrier coatings due to their excellent hydrophobicity as well as film-forming properties, the coated unsaturated cellulose esters would be beneficial to design reactive materials to further enrich their functionalities, e.g., antibacterial performance. Herein, solutions of cellulose undecenoyl esters (CUEs) were bar-coated to base papers. Obvious coating films were formed on the paper surfaces from the coating grammage of 6.25 g m−2. The resulting CUE-coated papers displayed good mechanical performance, hydrophobicity, and water vapor barrier property (the barrier ratio up to 66.35%), and the best coating grammage was 11.62 g m−2. Additionally, the reactivity of the coated paper was evaluated by further immobilization of the antibacterial agent (polyhexamethylene guanidine hydrochloride (PHGH)) using photo-click thiol-ene and condensation reaction. The generated paper exhibited good antibacterial and water vapor barrier performance. The obvious reactivity of our CUE-coated paper indicated the great possibility to design multi-functional paper packaging materials.
研究领域:
材料科学
·
化学工程
·
包装技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）