CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Hui Shang,Xiaoxia Le,Muqing Si,Shuangshuang Wu,Yu Peng,Fuqing Shan,Si Wu,Tao Chen
Current hydrogel-based actuators have achieved rapid development due to their excellent performance such as shape-morphing and color-changing for application in fields such as camouflage, biomimetic soft-robotics and so on. However, it is still challenging to fabricate soft robots with the capability of simultaneous changes in shape and fluorescent color at a fast speed when triggered by one single stimulus. Herein, an anisotropic organohydogel actuator made up of rGO-doped hydrophilic poly(N-isopropylacrylamide) (PNIPAM) network and hydrophobic poly(lauryl methacrylate) (PLMA) network is prepared via a two-step interpenetrating method. Bearing fluorescent monomer N-(4-(1,2,2-triphenylvinyl)phenyl)acrylamide (ATPE) as well as fluorescent ligand 6-acrylamidopicolinic acid (6APA), the PLMA network shows fluorescent changes in color or brightness depending on the presence or absence of Eu 3+ ions in response to heat/NIR. In a word, the proposed organohydrogel actuator, which exhibits simultaneous fluorescence color variation and fast morphing in response to one stimulus, provides insights in designing and fabricating novel soft robots.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Junyi Tang,Yuanyuan Ren,Jiachun Feng
Stimuli-responsive materials with complex practical functions that could imitate certain behaviors of living organisms have wide potential applications in frontier fields. However, the fabrication of stimuli-responsive films with simultaneous change in fluorescence color and shape in response to a single stimulus, especially by a simple fabrication strategy, remains a challenge. Herein, a simple hydrogel-film-post crosslinking strategy is proposed to prepare films that exhibit fluorescence change accompanying with shape deformation under pH stimulus. The synchronous changes are realized by the combination of dynamic boron chemistry and pH-sensitive lanthanide complexes. Under different pH conditions, the protonation/deprotonation of the ligands coordinated to Eu 3+ ions could generate switchable on/off fluorescence behavior, while the association/dissociation of borate ester bonds between 3-aminobenzeneboronic acid (SA-PBA) and polyvinyl alcohol (PVA) could lead to macroscopic deformation. The existence of borate ester bonds is beneficial to the mechanical properties of composite films. Under pH stimulus, the film-based artificial flower could simulate the flowering of natural flowers accompanying with color changes and the film-based gripper could grasp object with a visual signal, which demonstrates that the SA-PBA/PVA/EuL films have great potential for wide application.
研究领域:
材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2021
·Vol. 12
·期 26
·3832-3841
·
IF 5.582
Taisheng Wang,Haoxiang Wang,Lei Shen,Na Zhang
Mechanochromic polymers (MCPs), which respond to mechanical stimuli via an optical signal change, are regarded for their application in smart materials, such as force sensors. Although rapid progress in MCPs has been witnessed in recent years, MCPs systems that can distinguish different magnitudes of stretching or compression stress through multicolor transformation are still hard to achieve. In this paper, we report our findings on a multicolor mechanochromic elastomer that can discriminate between low and high stretching stress. The key point of our design depends on the introduction of two mechanophores, which present different fluorescence changes in response to mechanical stimuli. These mechanophores were elaborately introduced to the multi-network elastomer though a multiple swelling–UV polymerization process. Under relatively low tensile stress (≲1.8 MPa), the formation of a blue-fluorescence anthracene derivative was observed, while under high tensile stress (≳1.8 MPa), both mechanophores were activated. Thus, the elastomer exhibited a blue-white and further red fluorescence. Although the present results remain preliminary, the macroscopic fluorescence change at different levels of stress could indicate where the stress is concentrated, which would be beneficial to elucidate the mechanism of material failures.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shuaibing Wang,Xiaomin He,Gaopeng Wang,Si Yu Zheng,Jintao Yang
Bilayer hydrogels, endowed with multiresponsive and switchable color-changing properties, have garnered significant attention for bioinspired artificial intelligent materials. However, the design and fabrication of such hydrogels that can fully mimic the adaptation of the live organism, i.e., simultaneous changes in shape, fluorescent, and/or visible color, still remain significant challenges. Herein, a multiresponsive (e.g., temperature, salt, and pH) and multiadaptive (shape, fluorescent color, and visible color changes) hydrogel was fabricated by employing monomers featuring pH-responsive fluorescence 4-(2-(4-(dimethylamino) phenyl)-1-isocyanovinyl) phenol (DP) and switchable color-changing 4-(2-sulfethyl) −1-(4-vinylbenzyl) pyridinium betaine (VPES). The bilayer hydrogel comprises a temperature- and pH-responsive gel layer, poly(N-isopropylacrylamide-co-2-(dimethylamino) ethyl methacrylate), along with a pH-, temperature-, and salt-responsive gel layer, poly(acrylamide-co-2-(dimethylamino)ethyl methacrylate-co-VPES)@DP. Due to the opposite swelling/shrinking behavior between the two layers, the prepared hydrogel exhibits shape changes in response to thermal, salt, and pH stimuli, along with switchable fluorescent color and visible color change that originate from DP and polyVPES, respectively. Apart from multiresponsive behavior, this hydrogel also shows an excellent antifatigue property and high sensitivity, which makes it hold significant potential in many applications. We anticipate that this strategy to realize multiresponsive capability in this work can also inspire the design of the biomimetic smart materials.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 45
·14170-14180
·
IF 6.641
Caihong Shi,Jian Yao,Xinrui Wang,Xue Wen,Wenying Shi,Chao Lu
The emergence and transfer of triplet state excitons across a metal ion–ligand interface represents a significant technological breakthrough, with relevance to various optical applications. However, the regulation of the triplet energy transfer (TTET) process and mechanism via experimental techniques are two challenging topics. Here, an innovative TTET-based donor–acceptor system is proposed by combining the outstanding light absorption of carbon dots (CDs) with the exceptional energy transfer (ET) acceptor Eu3+. Definitive experimental evidence shows that the indirect ET proceeds rapidly and efficiently from the singlet to the triplet of the CDs to the Eu3+. Specifically, the CD singlet energy is not completely transferred to the triplet state. The partially retained CD singlet and Eu3+ emission show remarkable differences in maximum emission wavelength (up to 167 nm). Hence, the ratio of these two emission bands enables the measurement of fluorescence changes more accurately. Interestingly, water molecules not only reduce the fluorescence of Eu3+via vibronic coupling, but also prevent the ET process from the CDs to the Eu3+. This dual regulation of water molecules improves the sensing and visualization effect of the –OH-related environmental changes (e.g., humidity spatial and temporal resolution, H-bonding density and the number of –OH) by simple spectral methods, even by the naked eye.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Dong Chen,Yu Huang,Huangyong Jiang,Wumaier Yasen,Dongbo Guo,Yue Su,Bai Xue,Xin Jin,Xinyuan Zhu
Glucose oxidase (GOx) has seen large-scale technological applications, and the determinations of its activity that is directly related to the enzymatic functions are extremely important. However, conventional methods to analyze the enzymatic activity involving high oxygen dependency and indirect redox reactions are usually tedious and restricted in complicated environments. For analyzing enzymatic activity by direct detection of the electron signals from the active centers, mediators are often used for facilitating the electron transfer. Differing from common methods of preparing electron mediators-contained GOx composites, a strategy aiming at remolding of the enzyme itself has been proposed in this work. Cofactor-like molecule 2′-diallyamino-ethyl flavin (DAA-flavin) derived from riboflavin is synthesized and incorporated as cross-linker into the polyacrylamide (PAAm) network around GOx surface by in situ polymerization to obtain enzyme nanocapsules termed as GOx@Fla-c-PAAm. The peripheral polymer shell confines the orientation of GOx and prevents it from denaturing, whereas incorporated DAA-flavin can replace the oxygen as an alternative electron acceptor to interact with the active centers of GOx in the presence of the substrate, thus giving the nanocapsules oxygen-independent characteristics. The introduced unlimited cofactor-like molecules endow the nanocapsules redox-related fluorescence, and the intensity variation is closely correlated with the enzymatic activity. There is a high goodness of fitting (R2 ∼ 0.990) between the slope of linear fluorescence–time plots and enzymatic activity, thereby making the nanocapsules a reliable activity-reporting enzymatic nanosystem with oxygen-independent fluorescence variation for further extended potential application in biofuel cells and biosensors.
研究领域:
生物化学
·
纳米技术
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生物传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2022
·Vol. 6
·期 15
·2114-2121
·
IF 8.683
Xiangnan Wang,Zeyu Feng,Congyang Ye,Haofeng Zang,Yonghua Lu,Hongli Zhang,Gang Zou
Smart materials with programmable shape deformation and synergistic shape/fluorescence variation are highly desired in various practical applications, such as bio-inspired multifunctional robots and machines. However, it is still quite challenging to construct smart surfaces with dynamic fluorescence and morphology from MOFs, which potentially introduce superior performance. Herein, we proposed to utilize Zn-TCPP MOFs and polyurethane to construct a smart hybrid gel, which could exhibit synergistic dynamic fluorescence and reconfigurable patterns upon treating with pure water. Their reversible fluorescence variation as well as the swelling of the surface could be observed even directly by the naked eye. Based on the above results, we designed a dual-response rewriting pattern and flower-like artificial actuator with simultaneous fluorescence variation and shape deformation performance. This study would be of great fundamental value in the rational design of novel smart materials and surfaces.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2014
·Vol. 292
·期 12
·3223-3231
·
IF 2.41
Xing Pengyao,Chu Xiaoxiao,Du Guangyan,Ma Mingfang,Li Shangyang,Hao Aiyou
Here, we report a dual stimuli-responsive organogel which can stabilize graphene oxide (GO) in apolar solvents. The gelator 1-octadecyl-ureido-naphthalene (OUN) was synthesized, and it could form organogel in toluene and xylene. The resultant gels can respond to thermal and anion stimuli, bringing about fluorescent changes. Thin nanoribbons are entangled together to form three dimensional networks that can immobilize solvents in gel, providing large superficial area to interact with GO sheets. The addition of GO influences the gel properties, which are studied through rheological, fluorescent, and DSC measurements.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 27
·19174-19184
·
IF 3.9
Peixin Hu,Hechao Lu,Qinting He,Fang Ren,Juan Wu,Wei Jiang
In this work, intelligent pH-sensitive sensors (Fe3O4/RhB@PAM) for Cr(VI) detection were successfully synthesized based on polyacrylamide (PAM) and Rhodamine B (RhB) co-modified Fe3O4 nanocomposites. The characterization results indicated that the sensors had many favorable properties, including suitable size, stable crystal structure and excellent magnetic response performance (47.59 emu g−1). In addition, the fluorescence changes during the detection process indicated that Fe3O4/RhB@PAM were “ON–OFF” intelligent sensors. When the Fe3O4/RhB@PAM sensors were placed in acidic Cr(VI) solution (pH 4), PAM acted as a pH-responsive “gatekeeper” releasing RhB, and the fluorescence intensity of released RhB was weakened by the complexation of Cr(VI). Furthermore, the fluorescence changes of the magnetic sensors were remarkably specific for Cr(VI) even in the presence of other competitive cations, and the limit of detection (LOD) for Cr(VI) was lower (0.347 μM) than the value recommended by the World Health Organization (0.96 μM). All the results presented in this study showed that the Fe3O4/RhB@PAM sensors had significant potential for Cr(VI) detection in acidic environmental samples.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Puli Hu,Hongzhi Liang,Beier Kong,Jinjiang Lv,Aori Qileng,Hongshuai Zhu,Yingju Liu
Accurate consumer perception of food packages should provide real-time feedback on any changes inside food packaging. Hence, a new multilayer gas-sensitive label (POA-12) was prepared using a layer-by-layer pouring method for simple, visual, and real-time detection of pork's freshness, while the front side was developed by immobilizing red carbon dots and fluorescein isothiocyanate in POA as indicator for volatile nitrogen, and the back side was created using bromothymol blue in POA as pH indicator. The swelling index of the multilayer gas-sensitive labels reduced from 159.19% to 148.36%, and the tensile strength increased from 25.52 MPa to 42.61 MPa. In addition, the POA-12 multilayer label showed a red-to-yellow fluorescence change as TVB-N increased from 6.84 to 31.4 and a yellow-brown-to-blue-green color change as pH increased from 5.74 to 7.24 when detecting pork samples. Thus, it provides dual-indicator monitoring that improves the accuracy and reliability of assessing the freshness of high-protein products.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2024
·
IF 4.1
Xiao Le-Ping,Qiu Lv-Ming,Wu Zhen,Wang Guo-Jie
To realize single-stimulus-induced simultaneous multi-behaviors in hydrogels is still quite challenging nowadays. Herein, an intelligent pH-responsive hydrogel (BP4VA/PAS) with rapid and high contrast changes in color, fluorescence, and shape simultaneously is reported. The BP4VA/PAS hydrogel is fabricated by incorporating styryl anthracene derivative (BP4VA) into copolymer networks (PAS) of acrylamide and sodium 4-styrene sulfonate. Under acid conditions, the protonation of BP4VA generates a rapid change with high color contrast from yellow to red and a fluorescence switch between bright green and weak red emission. At the same time, the electrostatic interactions between 2H-BP4VA 2+ and sulfonate anions suspended on PAS trigger BP4VA/PAS hydrogels to shrink. Upon alkaline treatment, the 2H-BP4VA 2+ /PAS hydrogel deprotonates and recovers to its original color, fluorescence, and shape. Furthermore, utilizing rapid and remarkable pH-responsive properties of BP4VA/PAS hydrogels, we successfully demonstrated its applications in biomimicry, camouflage, and multistage information encryption. Collectively, this work provided an elegant strategy to develop intelligent hydrogels in applications of biomimetic smart materials and information encryption.
研究领域:
材料科学
·
生物仿生学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2013
·
IF 1.977
Huihui Chen,Yunhui Sun,Chuanjian Zhou,Duxia Cao,Zhiqiang Liu,Lin Ma
Three new 4-hydroxy aurone compounds 1 – 3 with dimethylamino ( 1 ), bromine ( 2 ) and cyano ( 3 ) as terminal group have been synthesized. Their photophysical properties as well as recognition properties for cyanide anions in acetonitrile and aqueous solution have also been examined. These compounds exhibit remarkable response to cyanide anions with obvious color and fluorescence change owing to hydrogen bonding reaction between cyanide anions and the O–H moiety of the sensors, which allows naked eye detection of cyanide anions.
研究领域:
有机化学
·
分析化学
✓ 已验证
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）