FOOD CHEMISTRY
·
2025
·
IF 9.8
Li Xia,Zhina Chen,Hui Liu,Ying Xue,Hualin Wang
In recent years, there has been an increasing focus on the development of active films for monitoring and maintaining food freshness. However, its further functional diversification remains highly desirable. In this study, the active polycaprolactone (PCL) based membranes loaded with carvacrol (CA) are fabricated via electrospinning technique for grape preservation. Upon touching with ethanol exudate, the resulting membrane is capable of changing from opaque to a reversible transparent packaging (RTP) through interfibrillar fusion during food storage. The RTP exhibits good reusability with light transparency above 80 % after 10 cycles. CA is well-dispersed in the fiber matrix by hydrogen bonding and enriching the membrane with strong antibacterial activity. Furthermore, the release of CA from film matrix is well controlled and predominantly governed by Fickian diffusion. In addition to freshness monitoring, PCL-CA15 can effectively extend the shelf life of grape by about 4 days at 25 °C.
研究领域:
食品科学
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材料科学
·
生物学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Jiazhuo Huang,Dongying Han,Yilin Shi,Qingbiao Li,Daohua Sun
Oil-water separation membranes with the merits of low energy consumption and high efficiency, have played an irreplaceable role in both industrial wastewater treatment and oil purification. Nevertheless, the simple preparation of an intelligent responsive membrane with rapid cyclic response, non-toxicity, and high efficiency remains a substantial challenge. In this paper, the material with ethanol-induced wettability conversion was prepared by hydrothermal and impregnation methods. Notably, the material can rapidly switch between superhydrophobicity and superhydrophilicity in less than 2 min, with more than 10 cycles of reversibility. The reasons have been insightfully revealed for the changes in the wettability of the membrane through surface energy physical parameters. Significantly, various oil–water mixtures were separated with high efficiency (99.7 %) and high flux (3.46 × 10 4 L·m −2 ·h −1 ) by gravity alone before and after the membrane wettability transition. In addition, the material exhibited excellent durability (more than 10 times), chemical and mechanical stability. This controllable wettability surface with the advantages of easy preparation, low cost, fast reversible response, wear resistance and durability, being expected to play an essential role in on-demand oil–water separation applications.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2019
·Vol. 29
·期 40
·1903743
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IF 15.621
Yong Qi,Lin Chu,Wenbin Niu,Bingtao Tang,Suli Wu,Wei Ma,Shufen Zhang
Combining functional response materials into colloidal photonic crystals is an accepted encryption strategy for information security. Here, bilayer inverse heterostructure photonic crystals that enable instantaneously transparentizing of the top layer and simultaneously releasing the reflected light of the bottom layer when exposed to ethanol are reported. The transition can quickly return to its original state after the evaporation of ethanol. In addition, the bilayer film is responsive to water, which shows redshift of the bandgap position. The mechanism of the design involves optical scattering and diffraction in the fabricated periodic nanostructures and uses the infiltration and capillary evaporation of fluids with low surface tension to realize the spectral diversity of reflectance. The effects of scattering and color superposition of the upper layer can be obliterated and re-established for the fact of the infiltration and capillary evaporation of fluids with low surface tension; meanwhile, it provisionally displays the pattern of the bottom layer. Multiple reversible ways to hide and display information could be easily realized by these characteristics. Reconfigurable bilayer inverse heterostructure photonic crystals simultaneously provide a simple and sensitive optical technique for investigating the intriguing encryption effects at the nanoscale.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yukun Liu,Zhipeng Meng,Senlin Miao,Haofei Huang,Jie Ren,Yaqun Han,Suli Wu
Stimulus-responsive inverse opal photonic crystals (IOPCs) with tunable structural colors show significant promise in information security. To improve upon the traditional bilayer structure with limited color information and single decoding mode, this work developed an ethanol-responsive structure with multi-level information encryption ability by inserting a functional layer into two shielding layers (red Layer A with a photonic stop band (PSB) at 640 nm and green Layer C with a PSB at 530 nm). The functional layer was composed of colorless Layer B, a quick response (QR) code pattern made of TiO 2 nanoparticles, and a dense polymer. Due to the isolation of distinct layers, different reflectance values, and different PSB positions of the three-layer IOPC, the structural color of Layer B could only be “turned on” by wetting the entire structure when its PSB redshifted from 360 nm to 460 nm. Specifically, when either side was individually wetted, the PSB of Layer A or C redshifted to 825 nm or 685 nm, and the color of the QR code was dominated by the unwetted red or green layer. After the entire structure had been soaked, the blue QR code was decoded. Meanwhile, when the detecting angle increased from 5° to 60°, the PSBs of Layers B and C in the wetted three-layer IOPC blueshifted from 460 nm to 365 nm and from 685 nm to 540 nm, respectively, which resulted in a cascade decoding process with a single- or mixed-color output. This structure provides a good foundation for multi-level information encryption.
研究领域:
材料科学
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光学
·
信息安全
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Changtong Zhou,Yong Qi,Shufen Zhang,Wenbin Niu,Suli Wu,Wei Ma,Bingtao Tang
The integration of novel structures into colloidal crystals provides the possibility of constructing stimuli-responsive photonic materials. However, in most opal and inverse opal structures, replacing the interior air with an infiltrated liquid will cause partial refractive index matching, resulting in the reduction or even disappearance of the photonic band gap. Herein, inspired by the lotus seedpod, an innovative particle-nested double-inverse opal film with fast and reversible structural color switching (≈1 s) is first fabricated by introducing polystyrene (PS) spheres into an inverted opal backbone. Importantly, refractive index matching can be effectively avoided due to the existence of internal PS spheres, and optical switching from diffusive to photonic behavior is achieved by a liquid with low surface tension for the response. Furthermore, a reversible ethanol stimuli-response bilayer double-inverse opal film with multistate switching for information encryption is proposed by combining optical scattering and diffraction. The scattered light from the top layer caused by the randomly distributed and weakly scattering PS spheres within the pores makes the pattern at the bottom invisible. Simultaneously, the display and discoloration of the pattern can be realized instantaneously by ethanol response. Thus, this new preparation strategy exhibits great potential in the security fields.
研究领域:
材料科学
·
光学工程
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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）