ACS Omega
·
2021
·
IF 3.512
Shangjie Jiang,Shisheng Zhou,Bin Du,Rubai Luo
In this paper, a method for preparing a high-stability superhydrophobic paper with temperature-induced wettability transition is proposed. First, a temperature-responsive superhydrophobic triblock polymer PHFMA–PTSPM–PNIPAAm was prepared by one-step polymerization of TSPM, HFMA, and NIPAAm in a mass ratio of 0.3:0.3:0.3, then a superhydrophobic paper with a good temperature response was successfully prepared by grafting amino-modified SiO2 with the polymer to modify the surface of the paper. A further study found that when the mass ratio of amino-modified SiO2 to polymer is 0.2, the coating has good superhydrophobicity and transparency. What is more, the prepared modified paper is in a superhydrophobic state when the temperature is higher than 32 °C, and is in a superhydrophilic state when it is lower than 32 °C, which can realize free conversion between superhydrophobic and superhydrophilic states. In addition, the superhydrophobic paper prepared by this method not only has high oil–water separation efficiency, and the superhydrophobic coating shows good stability and transparency, but also has low requirements of environmental conditions for preparation, relatively simple preparation process, and strong repeatability, and it has a very broad application prospect.
研究领域:
材料科学
·
表面化学
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DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2021
·Vol. 39
·期 12
·1609-1616
·
IF 3.603
Wang Meng,Chu Da,Liu Li,Huang Shuai,Chen Xu-Man,Liu Zhi-Yang,Yang Hong
Reversible switching from a highly rough surface to another entirely smooth surface under external stimuli is crucial for intelligent materials applied in the fields of anti-fogging, self-cleaning, oil-water separation and biotechnology. In this work, a thermal-responsive liquid crystal elastomer (LCE) surface covered with oriented micropillars is prepared via a facile two-step crosslinking method coupled with an extrusion molding program. The reversible change of topological structures of the LCE surface along with temperature is investigated by metallographic microscope, atomic force microscopy and optical contact angle measuring system. At room temperature, the LCE sample is filled with plenty of micropillars with an average length of 8.76 µm, resulting in a super-hydrophobic surface with a water contact angle (WCA) of 135°. When the temperature is increased to above the clearing point, all the micropillars disappear, the LCE surface becomes entirely flat and presents a hydrophilic state with a WCA of 64°. The roughness-related wetting property of this microstructured LCE surface possesses good recyclability in several heating/cooling cycles. This work realizes a truly reversible transformation from a highly rough surface to an entirely smooth surface, and might promote the potential applications of this dynamic-responsive LCE surface in smart sensors and biomimetic control devices.
研究领域:
材料科学
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生物技术
·
表面工程
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 47
·2105771
·
IF 18.808
Fei Zhang,Wenqing Liang,Lintao Wang,Zhuangzhuang Ma,Xinzhen Ji,Meng Wang,Yue Wang,Xu Chen,Di Wu,Xinjian Li,Yu Zhang,Chongxin Shan,Zhifeng Shi
Hydrochromic materials have attracted widespread attention in the fields of anti-counterfeiting because of their ability of the reversible light absorption and/or emission properties in response to water. Here, for the first it is demonstrated that the ternary copper halides Cs 3 Cu 2 I 5 nanocrystals (NCs) possess excellent hydrochromic properties. The prepared Cs 3 Cu 2 I 5 NCs films can dynamically extract and insert CsI by exposing/removing water to realize the reversible conversion between blue-emissive Cs 3 Cu 2 I 5 and yellow-emissive CsCu 2 I 3 . Interestingly, polymethyl methacrylate (PMMA) coated Cs 3 Cu 2 I 5 can effectively avoid the extraction of CsI and maintain long-term stability in the water. Further, the hydrochromic Cs 3 Cu 2 I 5 and water-resistant Cs 3 Cu 2 I 5 @PMMA are used as the inks to synergistically act on anti-counterfeiting information to achieve multiple encryption effects, which can clearly identify and authenticate the effective information after moisture decryption. Importantly, the pattern can be re-encrypted to the invalid pattern after water evaporation. In addition, the anti-counterfeiting pattern has excellent stability during repeated encryption/decryption conversion cycles, which can not only balance the accessibility of anti-counterfeiting information but also effectively improve the security of information. This new discovery may not only deepen the understanding of Cs 3 Cu 2 I 5 but also provide new options for the design of hydrochromic materials for anti-counterfeiting information.
研究领域:
材料科学
·
光学
·
防伪技术
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 11
·5072-5085
·
IF 4.5
Wan Li,Lin FanKai,Yue Wen,Feng Jian,Liu XianJie,Min Xin,Wang Chengbiao,Huang ZhaoHui
The discovery of novel polymeric materials with variable heat transport properties could revolutionize the utilization and manipulation of thermal energy to keep devices working optimally. Here, we synthesized a poly-1-butyl-5-((4-(phenyldiazenyl)phenoxy)methyl)2-ethyl-2,4,4-trimethylpentanedioate (AzoBmapolymer) containing photoisomerization’s groups through reversible addition-fragmentation chain transfer polymerization. Firstly, using a thermal conductivity (TC)-measuring instrument, we demonstrate the TC of photoresponsive AzoBmapolymer that reversibly switches between low (0.13 ± 0.02 Wm −1 K −1 ) and high (0.24 ± 0.02 Wm −1 K −1 ) states. And surprisingly, the 84.6% change of TC was achieved by the modulation of the AzoBmapolymer containing photoisomerization's groups through green and ultraviolet photoirradiation. What is more, our synthesized photosensitive AzoBmapolymer is capable of TC transition within 7 s controlled by photoirradiation, and its photoregulated TC transition rate is dozens or hundreds of times higher than that driven by magnetic field molecular orientation (0.17 h), electrochemical oxygenation (0.5 h), or temperature modulation (1 h). Theoretically, the photoisomerization's groups of AzoBmapolymer can lead to different spatial configurations of macromolecules. Meanwhile, this conformational transition results in a change in the π–π stacking (d π–π ) spatial configuration and an amorphous-to-crystal transition. More importantly, X-ray diffraction, crosspolarized optical microscopy, and TC-measuring instrument jointly demonstrate that photoirradiation reversibly change the thermophysical properties of AzoBmapolymer phonon transport. In other words, this result illustrates a powerful manipulation of the thermophysical properties of the polymers by photoirradiation. The AzoBmapolymer could complement traditional metal heat transfer materials used in applications; for instance, heat exchangers, electronic packaging, and heat sink.
研究领域:
材料科学
·
热物理
·
高分子化学
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产品关联
DOI
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Ensheng Zhang,Long Jiang,He Li,Shuping Wang,Guixue Zhang,Anzhang Li,Weiheng Kong,Yan Zhao,Meihao Xiang,Ping Ju,Fengli Qu
Smart molecules with adjustable and reversible ACQ-AIE transformation which could be used as luminescence sensors both in solvent and solid-state are rarely reported. Planar luminophores with strong inter-molecular hydrogen bonds and a rotor might exhibit reversible ACQ-AIE conversion by modulating the inter-molecular hydrogen bonds. As a proof of concept , herein, two smart hydrogen bond dimers ( Qufu-1 and Qufu-2 ) with reversible ACQ-AIE transformation were derived from the renewable bio-feedstock shikimic acid. Qufu-1 and Qufu-2 possessing a novel 4-oxo-3,4-dihydrobenzofuro[2,3- d ]pyrimidine key structure and both exhibit crystallization induced ACQ (CIACQ) and precipitation induced AIE (PIAIE) in solid-state. Single crystal analysis indicates that the large planar configuration formed in the dimers of Qufu-1 and Qufu-2 due to the inter-molecular hydrogen bonds, which would result in the strong π-π stacking and ACQ in crystal. The AIE state could be facile realized by breaking the inter-molecular hydrogen bonds and changing the aggregation state from crystal to precipitation. Moreover, ACQ to AIE transformation could also accomplish for Qufu-1 and Qufu-2 in solution by modulating the inter-molecular hydrogen bonds with acid. In addition, three-level structures latent fingerprint identification in real environment and fluorescent sensing of hazardous biogenic amines in food samples were performed with Qufu-1 .
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
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
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Jian-Peng Hu,Qi Zhao,Qi Lin,Hong Yao,You-Ming Zhang,Tai-Bao Wei
Isoniazid ( INH ) is crucial in the treatment of tuberculosis; however, its overuse may induce significant gastrointestinal and hepatic side effects. On October 27, 2017, the International Agency for Research on Cancer, under the auspices of the World Health Organization, published a list of carcinogens for preliminary collation and reference. Isoniazid was categorized as a Group 3 carcinogen. The efficient detection of INH poses an important and challenging task. In this study, a “synergistic effect” is incorporated into the pillar (Yamagishi and Ogoshi, 2018) [5] arene-based macrocyclic host ( DPA ) by strategically attaching bis-p-hydroxybenzoic acid groups to the opposite ends of the pillar (Yamagishi and Ogoshi, 2018) [5] arene. This combination endows DPA with a reversible and selective fluorescence response to isoniazid. Additionally, DPA exhibits excellent analytical capabilities for isoniazid, including speed and selectivity, with a detection limit as low as 4.85 nM. Concurrently, DPA can self-assemble into a microsphere structure, which is convertible into micrometer-sized tubular structures through host-guest interactions with isoniazid. The introduction of a competitive guest, trimethylamine, enables the reversion to its microsphere structure. Consequently, this study presents an innovative and straightforward synthetic approach for smart materials that facilitates the reversible morphological transition between microspheres and microtubes in response to external chemical stimuli. This discovery provides a valuable strategy for designing “synergistic effects” in constructing trace-level isoniazid-responsive interfaces, with potential applications across various fields, such as controlled drug delivery.
研究领域:
分析化学
·
材料科学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Jérémie Courtois,Chen Wang,Qiang Tian,Bin Wang,Wei Feng
Photochromic stimuli-responsive coordination polymers that offer on-demand molecular structure modifications are promising building blocks for next generation of multi-functional materials. Getting closer to some applications requires these materials to be in condensed phases, which is yet lacking. In this work, ≈ 300 - 450 nm colloidal particles made of a coordination polymer that includes dimethyldihydropyrene (DHP) as photoswitchable units have been synthesized. ZnDHP particles exhibit a photochromic behavior based on the reversible conversion of “closed” DHP units into “open” cyclophanediene (CDP). Ring opening in the condensed phase was triggered by visible light illumination while back-conversion was performed by either heating or irradiation with UV light . Experiments were monitored by UV–vis spectroscopy. Results showed good reversibility of the system with < 5 min back-conversion under UV irradiation . Nanostructure of the particles was studied by TEM and SAXS . Particles are made of 10 – 25 nm dense parallelepipedic nanoparticles organized into a slightly loose network. SAXS analysis demonstrates that ZnDHP particle structure is resilient to ZnCDP conversion. Finally, ability of ZnCDP-O 2 particles to release singlet oxygen during their back-conversion to ZnDHP particles is demonstrated by EPR experiments.
研究领域:
材料科学
·
化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lianyi Xu,Qiang Ye,Xuemin Lu,Qinghua Lu
An electro-responsively reversible switching of wettability between superhydrophobicity and superhydrophilicity has been obtained from a highly porous structured polythiophene film. The polythiophene film was prepared by two-step electrochemical deposition on an indium tin oxide (ITO) substrate. The underlying poly(3,4-ethylenedioxythiophene) (PEDOT) provides a highly porous structured conductive support, and poly(3-methylthiophene) (P(3-MTH)) deposited thereon plays the role of a low-surface-energy conductive coating. The wettability switching of this double-layer film between superhydrophobicity and superhydrophilicity has been investigated by doping and dedoping in an electrolyte solution containing ClO4–. Electrochromism of the film was also seen to accompany the electrochemical process of conversion between the two superwetting states. On the basis of this porous electro-active film, an in situ electro-wetting device was also demonstrated.
研究领域:
材料科学
·
表面科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 40
·19118-19123
·
IF 3.925
Danyang Liu
A fluorescent molecular switch (SP-OX-HBT), designed by fusing spiropyran with 2-(2-hydroxyphenyl)benzothiazole (HBT), exhibited red, orange and dark emission color switching among four states in the solution and solid states. The transformation from merocyanine (SP-OX-HBT) to ring-closed spiropyran (SP-HBT-C) or deprotonated ring-closed spiropyran (SP-HBT-CN) could be controlled by visible light or base stimuli, respectively, and these processes are verified by UV-vis spectra. The deprotonated merocyanine form (MC-N) was briefly involved in the basochromic process in solution but stable in the solid state. Besides the significant visible and fluorescent color variations, the single molecular switch has been further successfully applied to construct reversible multicolor displays and for anti-counterfeiting.
研究领域:
化学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Huan Tian,Yi Liu,Feng-Lei Jiang
Perovskite nanocrystals attract growing interest owing to their unique optoelectronic properties. However, their chemical stability is relatively poor due to their ionic nature. In this work, we found that inorganic cations (e.g., Cs+) and ligands (e.g., didodecyldimethylammonium bromide, DDAB), used in the synthesis of CsPbBr3 nanocrystals (NCs) at ambient temperature, quickly converted CsPbBr3 NCs to Cs4PbBr6 NCs during the synthesis or postsynthetic treatment. These cations (Cs+, DDA+) were involved in both the chemical composition and dissociation of CsPbBr3 NCs. Nevertheless, DDA+ induced the generation of an impurity in addition to Cs4PbBr6 NCs due to its different nature from that of Cs+. The transformation process was observed by optical spectroscopy and transmission electron microscopy. The reverse transformation of Cs4PbBr6 NCs to CsPbBr3 NCs can be carried out completely by adding sufficient PbBr2 into Cs4PbBr6 NCs. Therefore, the forward and backward reactions were driven by Cs+ and Pb2+. With additional DDAB for passivation during the reverse transformation, the resulting product possessed a better photoluminescence quantum yield (PLQY, ∼90%) compared with that without the involvement of DDAB (∼69%). By considering the Cs4PbBr6 NCs as the Cs source, the reverse transformation can be analogized to the synthesis of CsPbBr3 NCs, providing a possible strategy for synthesizing luminescent perovskite NCs at room temperature with theoretical stoichiometry.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Yan Gong,Xiaofeng Wu,Xinyuan Zhou,Xiaofei Li,Ning Han,Yunfa Chen
The typical core-shell Pt@ZnO, 1 mol% Ga doped Pt@ZnO and 2 mol% Ga doped Pt@ZnO nanoparticles were synthesized and utilized in acetone and NO 2 sensing. Among those nanoparticles, 1 mol% Ga doped Pt@ZnO based sensor presents excellent acetone sensitive and interesting reversible switching from P- to N-type NO 2 sensing. The response of the 1 mol% Ga doped Pt@ZnO based sensor to 50 ppm acetone is as high as 296, and the detecting concentration limit to acetone and NO 2 is as low as 10 ppb and 20 ppb. The analogical binary p-n transition phase diagram was established to understand the NO 2 -sensing reversible switching as a function of operating temperature (T) and NO 2 gas concentration (C). The role of Ga doping in enhancing the sensing property and the mechanism of NO 2 p–n sensing transition is elaborated. In conclusion, the doping of Ga into core-shell Pt@ZnO was proved to be a feasible method for fabricating acetone and NO 2 sensor, with high sensitivity and selectivity.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）