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Ameliorating characteristics of magnetically sensitive Tpu nanofibers-based food packaging film for long-life cheese preservation

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FOOD BIOSCIENCE 2023年第3期53卷 1320-1331页

作者： El-Nawasany, Lamiaa I. Sundookh, Ahmad Kadoum, Lamiaa A. Yasin, Mona A. AlSalem, Huda S. Binkadem, Mona S. Al-Goul, Soha T. Zidan, Nahla S. Shoueir, Kamel R. Agr Res Ctr ARC Anim Prod Res Inst APRI Giza 12611 Egypt Appl Sci Private Univ Fac Allied Med Sci Dept Clin Nutr & Dietet Amman Jordan Damietta Univ Fac Agr Food Sci Dept Damietta El Gadeeda City Egypt Princess Nourah Bint Abdulrahman Univ Coll Sci Dept Chem POB 84428 Riyadh 11671 Saudi Arabia Univ Jeddah Coll Sci Dept Chem POB 80327 Jeddah 21589 Saudi Arabia King Abdulaziz Univ Coll Sci & Arts Dept Chem Rabigh Saudi Arabia Univ Tabuk Fac Sci Dept Food Sci & Nutr Tabuk Saudi Arabia Kafrelsheikh Univ Fac Specif Educ Dept Home Econ Kafrelsheikh Egypt Kafrelsheikh Univ Inst Nanosci & Nanotechnol Kafrelsheikh 33511 Egypt

The current study presents magnetic nanoparticles (MNPs) dispersed polyurethane (pu) nanofiber nanocoating with exceptional magnetic, thermal, hydrophobicity, and textural properties. X-ray photoelectron spectroscopy (XPS) was used to clarify the Fe3O4 MNPs synthesis, which had previously been accomplished using a single-step green method using molasses as a biowaste. The MNPs particles were then encapsulated in pu nanofibers with varying concentrations of 0.1, 0.3, and 0.5 wt%. SEM revealed a homogenous, smooth, and consistent fiber morphology with a diameter of 173.61 (size, nm), and the diameter rises with the addition of MNPs. With statistical significance (P pu/MNPs nanofiber showed intense antibacterial activity against different microbes. Notably, pu/0.5 wt% MNPs exhibit advantages as antimicrobial packaging materials by maintaining the quality and freshness of the Karish cheese and extending its shelf life to 40 days while also boosting its gumminess (5.9, N), hardness (7.93, N), cohesiveness (0.6), and adhesiveness (1.14, mg). Iron content is quantified using inductively coupled plasma mass spectrometry (ICP-MS) to determine whether the developed materials are safe for food. These findings showed that pu/MNPs could be a valid alternative for controlling Karish cheese storage. Further research into the effectiveness of this method with various smear cheeses is possible.

关键词： pu nanofibers Magnetic nanoparticles Active food packing Microbiological investigation Texture profile analysis of karish cheese

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Trilayered Fibrous Dressing with Wettability Gradient for Spontaneous and Directional Transport of Massive Exudate and Wound Healing Promotion

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Advanced Fiber Materials 2023年第2期5卷 574-587页

作者： Lei Liu Hengqiu Sun Jiaming Zhang Bingjie Xu Yujie Gao Dongming Qi Zhengwei Mao Jindan Wu MOE Key Laboratory of Advanced Textile Materials&Manufacturing Technology Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Pediatric Surgery Taizhou Women and Children’s Hospital of Wenzhou Medical UniversityTaizhou 318000China MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China

Excessive exudate at wound sites increases treatment difficulty and severely decelerates the healing *** wound exu-date management,dressings with unidirectional liquid transport capability have exhibited enormous ***,it remains challenging to improve the one-way liquid transport ***,a trilayered fibrous dressing is constructed by sequentially electrospinning polyurethane(pu)and polyvinylidene fluoride(PVDF)onto cotton *** hot pressing,a stable wettability gradient is formed across the PVDF/pu/cotton dressing due to the melting and bridging of pu *** trilayered dressing exhibited rapid unidirectional transport with water penetrating from the hydrophobic side to the hydrophilic side in 6 *** hydrostatic pressure from the hydrophilic side to the hydrophobic side is 569%higher than that from the hydrophobic side to the hydrophilic side,indicating that the dressing has a profound unidirectional *** vivo experiments demonstrates that the trilayered dressing can accelerate the wound healing process,especially in the early stages of wound occurrence,by quickly draining the excessive *** study provides a new method to construct wound dressings with wettability gradients,which are advantageous for efficient exudate removal.

关键词： Trilayered fibrous dressing Exudate pumping pu nanofibers Wettability gradient Wound healing

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