Journal of Materials Chemistry C
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2018
·Vol. 6
·期 28
·7619-7625
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IF 5.976
Yongqi Yang,Lin Guan,Haicheng Jiang,Lijie Duan,Guanghui Gao
Ink-free printing based on photochromism has attracted great attention as a new generation of printing technology. However, the current photochromic materials are limited due to slow response and high cost. In this investigation, a rapidly responsive photochromic hydrogel with high mechanical strength was explored through the introduction of cheap ammonium molybdate into gelatin and hydrophobic associative polyacrylamide. The photochromic hydrogel exhibited excellent mechanical strength of 750 kPa and a rapidly responsive photochromic process of 5 seconds with UV light irradiation. Moreover, the hydrogel could withstand long elongation and high compressive stress with shape recovery ability. The rapid photochromic properties gave hydrogels with fast and easy “printing” performance. More importantly, the “printed” text or pattern in hydrogels could be erased at 70 °C in an oxygen environment. In addition, the hydrogel could be written on in characters by using reducing reagents. Photochromic hydrogels with ink-free printing ability would demonstrate a new design strategy for soft materials with low-cost, rapid response and high mechanical properties.
研究领域:
材料科学
·
化学工程
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Bingbing Cui,Guodong Fu
Given that heterojunction engineering is an effective method for improving the separation efficiency of photoexcited electrons in WO 3 -based photochromic systems, a series of solid-state photochromic Zr/Ti-MOF@WO 3 heterojunctions prepared via a facile hydrothermal strategy, where Zr/Ti-MOF with photosensitivity and chemical stability was selected as template to load WO 3 . Zr/Ti-MOF@WO 3 heterojunctions were verified as nanoparticles filled with thin layer structure and WO 3 was diffused into the Zr/Ti-MOF planar. The appropriate conductive band energies facilitate the transport of photostimulated electrons from Zr/Ti-MOF to WO 3 , resulting in a fast photresponse in color changes (it only takes 1 s). In addition, a carrier for information storage and data dynamic encryption was developed on the basis of the photochromic Zr/Ti-MOF@WO 3 heterojunctions. This work presents a promising way to improve the electron/holes separation efficiency by constructing unique heterojunctions and further explore novel WO 3 -based photochromic systems and broaden their applications in rewritable media and data security.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Muzammal Hussain,Zaheer Ahmad,Onome Ejeromedoghene,Khurram Shehzad,Muhammad Akhtar,Guodong Fu
Inkless paper made from photochromic materials has garnered significant interest owing to its potential to reduce both ink and paper pollution during production. In this research, we synthesized a dual-material film (EC-PVP/PGMEA/PMoA) and conducted a detailed investigation of its photochromic response to visible light and its microstructural properties. Initially, the film appeared as a translucent yellow, but upon exposure to visible light, it shifted to blue with a maximum absorption peak of 2.04 a.u. The film returned to its stable yellow state either by heating at 100 °C for 1 h or by being kept in the dark at RT conditions for 20 days, aided by PGMEA. The film's hydrophobicity decreased, attributed to PEG, and its hydrophilicity was confirmed by a reduction in water contact angle from 69.9° to 37.8°. XPS and ESR analyses revealed a Mo 5+ ratio of 0.42 and a signal at g = 2.017, indicating proton transfer and photo reductive interactions between PMoA particles and the EC-PVP/PGMEA matrix. This innovative study underscores the hybrid film's potential for applications in inkless printing and UV solar detection.
研究领域:
材料科学
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光学
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环境科学
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产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Wenhao Yuan,Jie Zhou,Mingyue Jiang,Qingfeng Sun,Gaoyuan Ye,Xiaochun Zhang,Hongjie Bi
The development and comparison of latent fingerprint (LFP) are crucial for the detection and identification of LFP. However, research on stable, clear, and no background interference’s fluorescent materials for LFP recognition are scarce. In this study, lignin-derived carbon dots (CDs) with orange red emission were synthesized and combined with polyvinyl alcohol (PVA) matrix for identification of LFP and ink-free printing. The physicochemical and microstructure of the CDs and CDs/PVA nanocomposite have been precisely elucidated by TEM , FT-IR, XPS , SEM , and TGA to verify the reaction of CDs with PVA forming hydrogen bonds. The effect of CDs on the mechanical properties of PVA nanocomposite was studied. The tensile strength and elongation at break of PVA nanocomposite were increased by 113.01 % and 175.26 %, respectively. The shape memory and fluorescence properties of CDs/PVA nanocomposite were studied under different conditions such as water, acid, alkali and heat. The fluorescence intensity of CDs/PVA nanocomposites was enhanced due to the deprotonation of CDs surface under alkaline conditions. By coating CDs/PVA solution on LFP, a stable fluorescent fingerprint with clear ridge details was formed on the composite film, and it is applied to letterpress printing and gravure printing, enabling personal identification and ink-free printing. Obviously, the nanocomposite film prepared herein has multiple functions, providing potential for the design and manufacture of advanced all-round personal information identification and encryption applications in extremely harsh high temperature and strong alkaline environments.
研究领域:
材料科学
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化学
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生物识别
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纳米技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Lihua Liu,Miao Zhang,Luqing Zhang,Yizhen Song,Lin Sun,Pengtao Ma
Photoresponsive functional materials, especially photochromic materials, have recently emerged as critical players in advancing cutting-edge optical applications. Herein, a Dawson-type Zr-substituted phosphotungstate, [NH 2 (CH 3 ) 2 ] 6 H 3 [( α 1 -P 2 W 17 O 61 )Zr(HCIT)]·9H 2 O ( 1 ; H 4 CIT = citric acid), was synthesized from a hexavacant precursor [H 2 P 2 W 12 O 48 ] 12− via a conventional solution method. A notable feature of compound 1 is that the substitution site of the polyanion [( α 1 -P 2 W 17 O 61 )Zr(HCIT)] 9− is positioned at the equator of the Dawson structure. This sharply contrasts with the previously reported polar substitution sites. Compound 1 was systematically characterized by IR, PXRD, XPS, UV, 31 P NMR and TGA. This compound possesses conspicuous photochromism with the half-life (t 1/2 ) achieved 0.140 min. The in vitro cytotoxicity assessment of compound 1 revealed minimal toxic effects on the normal cell lines NIH-3 T3 (mouse embryonic fibroblasts) and AML-12 (mouse normal hepatocytes). Even at a high concentration of 80 μg/mL, cell viability remained greater than 90 %. Additionally, a photochromic composite film GEL/TEG/ 1 was prepared by incorporating 1 into a triethylene glycol (TEG) and gelatin (GEL) matrix. The GEL/TEG/ 1 composite film exhibited a pronounced color change within 30 s of UV irradiation (λ = 365 nm) and reached saturation in 6 min. Photochromic films demonstrate rapid, light-induced patterning capabilities that enable facile image formation without conventional printing processes. The photopatterned images on the film demonstrated reversible behavior, with complete erasure occurring within 3 h under ambient conditions. The GEL/TEG/ 1 film demonstrated excellent cycling stability, maintaining reproducible coloration–decoloration behavior over at least 10 consecutive cycles without significant performance degradation. The GEL/TEG/ 1 film demonstrates potential for applications in ink-free patterning and advanced anti-counterfeiting technologies, leveraging its reversible photochromic properties.
研究领域:
材料化学
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光功能材料
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纳米化学
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生物相容性评估
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智能响应材料
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）