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Although it is well-established that irradiation of produce can reduce food-borne pathogens and spoilage organisms, data on the effect of irradiation on polymer additives in food packaging materials are limited, particularly for those additives used in packaging leafy greens or in current food packaging materials. We investigated the effects of irradiating a nucleating agent, aluminium, hydroxybis[2,4,8,10-tetrakis(1,1-dimethylethyl)-6-hydroxy-12H-dibenzo [d,g][1,3,2]dioxaphosphocin 6-oxidato]- (CAS Reg. No. 151841-65-5), at doses of 1-20 kGy in polypropylene. That nucleating agent was then extracted using accelerated solvent extraction and analyzed by liquid chromatography-tandem mass spectrometry (LC-MS/MS), liquid chromatography-photodiode array detection (LC-PDA), and solid-state nuclear magnetic resonance (SSNMR) spectroscopy. We found this nucleating agent was not significantly affected by radiation treatment up to 20 kGy. Therefore, this nucleating agent could potentially be useful in food packaging materials that will be irradiated at doses of 20 kGy or less. Establishing which additives are stable under anticipated irradiation doses will help support safety evaluation of food packaging materials.
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http://dx.doi.org/10.1080/19440049.2022.2037727 | DOI Listing |
Int J Biol Macromol
September 2025
Department of Nanoscience and Nanoengineering, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey; Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey. Electronic address:
This study presents the development of multifunctional starch-based biopolymer films reinforced with nitrogen-doped carbon quantum dots (N-CQDs), synthesized via a hydrothermal method, and exhibiting a high quantum yield (~70 %). N-CQDs were incorporated into the starch matrix at varying concentrations (0.1-1.
View Article and Find Full Text PDFAnal Sci
September 2025
Frontier Laboratories Ltd., 4-16-20, Saikon, Koriyama, Fukushima, 963-8862, Japan.
Biomass-based polymers such as poly(lactic acid) (PLA) have attracted much attention, because they are renewable, biocompatible, and nontoxic to the environment and have been used in various fields such as biomedical, agricultural, and food packaging industries. However, one of the common drawbacks of PLA-based materials is their low glass transition temperature in the amorphous state, while adding phenylphosphonic acid zinc salt (PPA-Zn) as a nucleating agent was found to be a promising method to improve the physical property of PLA. On the other hand, degradation of PLA-based materials in the environment may cause the pollution from the metal of a nucleating agent in PLA and quantification of nucleating agents in polymers is of interest.
View Article and Find Full Text PDFSmall
September 2025
South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, Guangdong Basic Research Center of Excellence for Energy and Information Polymer Materials, South Chi
Self-assembled poly(2-dimethylaminoethyl methacrylate)-poly(2-(diisopropylamino)ethyl methacrylate) (PDMA-PDPA) diblock copolymer nanoparticles are widely employed in biological applications, driving the need for a robust and scalable production method. Although polymerization-induced self-assembly (PISA) enables efficient nanoparticle synthesis at high solids content, its research and application to PDMA-PDPA are limited, likely due to kinetic trapping. Leveraging our recently developed generic time-resolved small-angle X-ray scattering (TR-SAXS) approach for PISA in non-polar media, a reversible addition-fragmentation chain transfer-mediated PDMA-PDPA PISA process in polar solvent that produces spherical micelles is examined.
View Article and Find Full Text PDFACS Macro Lett
September 2025
State Key Laboratory of Advanced Polymer Materials, Polymer Research Institute of Sichuan University, Chengdu 610065, China.
Typically, specific amide nucleating agents (NAs) that can form nanofibrous networks by self-assembly are vital to achieve poly(l-lactic acid) (PLA) with good heat resistance and transparency. However, the long time required for self-assembly during rapid cooling results in a narrow crystallization window for induced PLA, thus requiring a combination of high annealing temperature and a long annealing time. Herein, a synergistic nucleation strategy was introduced to address this challenge, i.
View Article and Find Full Text PDFACS Macro Lett
September 2025
Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Changzhou University, Changzhou 213164, P. R. China.
The anisotropic swelling behavior of hydrogels can be controlled by the alignment of their molecular chains. In this work, we report a strategy to precisely control the anisotropic swelling direction of hydrogels by leveraging a rationally designed liquid crystalline polymer in combination with large strain and annealing. A liquid crystalline polyester-polyethylene glycol random block copolymer (LCP--PEG) is synthesized via one-pot polycondensation.
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