ACS Applied Materials & Interfaces
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2022
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IF 10.383
Xiaochun Liu,Jianyu Wu,Zilun Tang,Jianxin Wu,Zhiyi Huang,Xingshan Yin,Jiahao Du,Xiaofeng Lin,Wenjing Lin,Guobin Yi
Developing a shape memory polyurethane with high mechanical properties, excellent self-healing has become a huge challenge for the development of smart materials. Herein, we report the design and fabrication of a shape memory polyurethane network terminated with coumarin units (HEOMC-PU) to address this conundrum. The synthesized HEOMC-PU exhibits exceptional mechanical performance with a breaking elongation of 746% and toughness of 55.5 MJ·m–3. By utilizing the dynamically reversible behavior of coumarin units to repair the damaged network, the efficient self-healing performance (99.2%) of HEOMC-PU is obtained. In addition, the prepared network and light-induced dynamic reversibility endow the HEOMC-PU with both liquid-state remoldability and solid-state plasticity, respectively, enabling polyurethane to be recycled and processed multiple times. Furthermore, based on the fluorescence responsive characteristic of coumarin, HEOMC-PU with a fluorescent pattern can be deformed into specific three-dimensional configurations by combining photolithography, self-healing, and the shape memory effect. Such a multilevel and multidimensional anti-counterfeiting platform with rewritable fluorescent patterns and reconfigurable shapes can open up a new encryption approach for future intelligent anti-counterfeiting.
研究领域:
材料科学
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智能材料
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Polymer Materials
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2024
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IF 4.4
Yuliang Wang,Ahmed Olalekan Omoniyi,Mingyu Zhang,Mingda Yang,Tuotuo Li,Dan Li,Chenyang Zou,Yang Zhou,Jianfu Zhang
This study introduces waterborne polyurethane (WPU) films with defined shape memory and multistimuli responsive properties for information encryption. The shape memory feature is attributed to the semicrystalline structure of polycaprolactone (PCL) serving as the soft segment in the WPU. Incorporating the photoreversible moiety 9-anthracenemethanol (9-An) impacts photoresponsive characteristics and enhances the tensile strength of the film after 1 h of ultraviolet irradiation. The demulsification-induced fast solidification (DIFS) method offers rapid film preparation, controllable thicknesses, and multidimensional shapes, surpassing the conventional cast method. Cellulose nanocrystals (CNCs) render the WPU composite films solvent-sensitive, inducing color changes through cholesteric structure pitch alterations. The resulting combination of photo- and solvent-sensitivity with shape memory attribute positions the films as promising candidates for multilevel information encryption, offering an approach to functional polymer film development.
研究领域:
材料科学
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高分子化学
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光学材料
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
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2020
·Vol. 8
·期 44
·15697-15704
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IF 7.059
Mengyu Deng,Yangdaiyi Zhang,Yufei Wang,Shimei Jiang
A new kind of photoswitchable polymer nanoparticle is prepared using polymerizable alkenyl carbon dots (PCDs) and a spiropyran derivative, together with methyl methacrylate (MMA) as the monomer, and mediated by one-pot miniemulsion polymerization. Switching between two different wavelengths of emitted light can be realized by intraparticle fluorescence resonance energy transfer (FRET). The FRET efficiency could be easily controlled by the feed ratios of the two chromophores and the excitation wavelengths. UV and visible light can be applied to modulate the fluorescence emission of the prepared nanoparticles. Upon visible light irradiation, the nanoparticles emit blue-green fluorescence of the CDs while spiropyran is in its closed form (SP). UV irradiation of SP gives rise to an open-ring isomer (MC). An SP-to-MC photoisomerization triggers a CD-to-MC FRET, and the resulting nanoparticles emit red light. Their fluorescence could be reversibly switched between blue-green and red by using UV/vis light irradiation with excellent photoreversibility and high stability. In addition, the novel nanoparticles with reversibly photoswitchable fluorescence could be directly applied in rewritable fluorescence patterning and dual-color fluorescence imaging of living cells.
研究领域:
材料科学
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生物医学工程
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光学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
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2021
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IF 4.889
Le Liu,Rongjin Zeng,Jiawei Jiang,Tiancheng Wu,Peisheng Zhang,Chonghua Zhang,Jiaxi Cui,Jian Chen
The photoswitchable system with color and multi-state fluorescence changes is the key to the realization of advanced multi-level information storage, and its application potential has far exceeded the monochromatic fluorescent system. Herein, we introduced a novel multi-state photoswitchable fluorescent polymeric nanoparticles , which contains two energy-matched photoswitchable fluorescent molecules, i.e. diarylethene derivative (BH, donor) and spiropyran derivative (SPMA, acceptor), to construct a tunable fluorescence resonance energy transfer (FRET) system. By optimizing the feeding ratio of the two photochromic molecules to control the efficiency of energy transfer, the fluorescence of the nanoparticles can be reversibly switched among none, red, orange, and green by adjusting the wavelength of light stimuli. In addition, the nanoparticles display good water dispersibility , high brightness, fast responsiveness, excellent photoreversibility, and long-term fluorescence stability. We also verified that the system has great potential in optical data storage, multi-layer information encryption , and anti-counterfeiting.
研究领域:
材料科学
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光学
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化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 44
·2303765
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IF 19
Xiang Li,Hong Wang,Jian Chen,Yong Tian,Chongchen Xiang,Wanqiang Liu,Zhihua Zhou,Jiaxi Cui,Xudong Chen
Photoswitchable fluorescent polymers (PFPs) are emerging as a class of promising systems for photowritable pattern, optical anti-counterfeiting, and information encryption. They typically use harmful UV light as the stimulus, which often leads to inevitable photobleaching and poor reversibility. To address this issue, visible-light-driven PFPs by copolymerization of novel negative photochromic spiropyran monomer and methyl acrylate are developed. The obtained copolymers display bright red fluorescence, which can be reversibly turned off by visible light irradiation. Many appealing features are observed in this system, including fast photo-responsibility, prominent photo-reversibility and photostability, simple preparation process, and processability. Their applications in photorewritable patterns, optical anti-counterfeiting, and information encryption are also demonstrated.
研究领域:
材料科学
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光电
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化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）