JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Huanjie Chi,Zhiguang Xu,Tao Zhang,Xiaomin Li,Zhu Wu,Yan Zhao
Stimuli-responsive surfaces with wettability change between superhydrophilic and superhydrophobic are susceptible to oil contamination which often ruins the surface. Herein, a coating with pH-switchable wettability transition between superamphiphobic and superhydrophilic-superoleophobic is achieved by rationally designing oleophobic/pH-responsive polymer heterogeneous chemistry. Fabrics modified with this coating show repellency to both water and oils, while upon exposure to acidic water (pH = 1) the fabrics change to be superhydrophilic-superoleophobic within a short response time of <5 s. More importantly, the superamphiphobicity of the fabric can be restored under mild alkaline condition (pH = 10), and the transition is reversible for many cycles. The effective in situ or ex situ wettability change under acidic/alkaline water treatment makes the coated fabric capable of separating oil–water mixture or even some mixtures of immiscible organic solvents. In addition, the coated fabric is also demonstrated to be promising as a new class of functional fabrics that provide protection against water and many oils in one condition, and can change to be hygroscopic, anti-static, oil-repellent and anti-oil-fouling in the other condition for improved wear comfort and self-cleaning.
研究领域:
材料科学
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表面化学
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纺织工程
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DOI
PubMed
高影响因子
Scientific Reports
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2017
·Vol. 7
·期 1
·1-9
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IF 4.259
Ge Xue-hui,Geng Yu-hao,Zhang Qiao-chu,Shao Meng,Chen Jian,Luo Guang-sheng,Xu Jian-hong
Here in this article, we classify and conclude the four morphologies of three-phase emulsions. Remarkably, we achieve the reversible transformations between every shape. Through theoretical analysis, we choose four liquid systems to form these four morphologies. Then monodispersed droplets with these four morphologies are formed through a microfluidic device and captured in a petri-dish. By replacing their ambient solution of the captured emulsions, in - situ morphology transformations between each shape are achieved. The process is well recorded through photographs and videos and they are systematical and reversible. Finally, we use the droplets structure to form an on-off switch to start and shut off the evaporation of one volatile phase to achieve the process monitoring. This could be used to initiate and quench a reaction, which offers a novel idea to achieve the switchable and reversible reaction control in multiple-phase reactions.
研究领域:
化学工程
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2016
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IF 2.857
Jun-Nan Tian,Bing-Qiang Ge,Yun-Feng Shen,Yu-Xuan He,Zhong-Xiu Chen
Interaction of endogenous sodium cholate (SC) with dietary amphiphiles would induce structural evolution of the self-assembled aggregates, which inevitably affects the hydrolysis of fat in the gut. Current work mainly focused on the interaction of bile salts with classical double-layered phospholipid vesicles. In this paper, the thermodynamics and structural evolution during the interaction of SC with novel unilamellar vesicles formed from vitamin-derived zwitterionic bolaamphiphile (DDO) were characterized. It was revealed that an increased temperature and the presence of NaCl resulted in narrowed micelle–vesicle coexistence and enlarged the vesicle region. The coexistence of micelles and vesicles mainly came from the interaction of monomeric SC with DDO vesicles, whereas micellar SC contributed to the total solubilization of DDO vesicles. This research may enrich the thermodynamic mechanism behind the structure transition of the microaggregates formed by amphiphiles in the gut. It will also contribute to the design of food formulation and drug delivery system.
研究领域:
生物化学
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食品科学
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药物递送系统
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DOI
PubMed
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 12
·1900071
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IF 2.622
Diwei Yan,Sa Liu,Yong-Guang Jia,Lina Mo,Dawei Qi,Jin Wang,Yunhua Chen,Li Ren
Realizing the reversible transformation of the supramolecular hydrogels is essential for their application as smart materials. The reversible sol-gel transition of the polypseudorotaxane (PPR) hydrogels is achieved through adding a CO 2 -switchable guest molecule into the PPR hydrogel of poly(ethylene glycol) (PEG) and α-cyclodextrins (α-CDs). Alternating treatments with CO 2 and heating drive such reversible transition due to the competitive complexation as evidenced by 2D NOESY 1 H NMR and isothermal titration calorimetry as well as X-ray diffraction. The present work describes a straightforward way to obtain switchable PPR hydrogels triggered by a compatible stimulus of CO 2 . These stimuli-responsive PPR hydrogels have potential applications as biomaterials.
研究领域:
材料科学
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化学
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生物材料
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
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IF 8.758
Chuanzong Li,Yunlong Jiao,Xiaodong Lv,Sizhu Wu,Chao Chen,Yiyuan Zhang,Jiawen Li,Yanlei Hu,Dong Wu,Jiaru Chu
Shape memory polymer (SMP) surfaces with tunable wettability have attracted extensive attention due to their widespread applications. However, there have been rare reports on in situ tuning wettability with SMP materials. In this paper, we reported a kind of distinct superhydrophobic SMP microconed surface on the silver nanowire (AgNW) film to achieve in situ reversible transition between pinned and roll-down states. The mechanism is taking advantage of the in situ heating functionality of the silver nanowire film by voltage, which provides the transition energy for SMP to achieve the fixation and recovery of temporary shape. It is noteworthy that the reversible transition could be repeated many times (>100 cycles), and we quantitatively investigate the shape memory ability of microcones with varied height and space under different applied voltages. These results show that the tilted microcones could recover its original upright state under a small voltage (4–11 V) in a short time, and the shortest recovery time is about 0.5 min under an applied voltage of ∼10 V. Finally, we utilize SMP microcone arrays with tunable wettability to realize lossless droplet transportation, and the tilted microconed surface also achieves liquid unidirectional transport due to its anisotropic water adhesion force. The robust microconed SMP surface with reversible morphology transitions will have far-ranging applications including droplet manipulation, reprogrammable fog harvesting, and so on.
研究领域:
材料科学
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表面科学
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Liming Zhang,Zhuang Zhao,Siyu Chen,Wei Chen,Xuying Zhong,Yuehua Peng,Yanling Yin,Jun Liu,Wei Dou,Dongsheng Tang,Weichang Zhou
CsPb 2 Br 5 has attracted a tremendous attention recently owing to its high stability and unusual optical properties. However, the transformation between CsPb 2 Br 5 and CsPbBr 3 has yet been fully understood and the origin of the bright green emission in CsPb 2 Br 5 is still under debate . In this work, we elucidate the mechanism of the abnormal green emission in CsPb 2 Br 5 and reveal the light/heating/humidity induced reversible transformation between CsPb 2 Br 5 and CsPbBr 3 . The detailed structure characterization indicates the successful synthesis of pure phase CsPb 2 Br 5 , which exhibits a non-luminous feature. Remarkably, after the treatment of ultraviolet laser irradiation or annealing, the pure phase CsPb 2 Br 5 can be transformed partially or completely into CsPbBr 3 , yielding an unexpected bright green emission. In addition, the transformed CsPbBr 3 can be converted back to CsPb 2 Br 5 under the humidity environment, demonstrating the reversible transformation and photoluminescence switch. Interestingly, CsPbBr 3 derived from transformed CsPb 2 Br 5 exhibits superior emission properties such as higher photoluminescence stability, compared with the one-spot directly synthesized CsPbBr 3 . Moreover, the light induced transformation facilitates the fabrication of CsPb 2 Br 5 /CsPbBr 3 nano-heterostructure diodes with a high rectification ratio. These results provide an important insight into the photophysics and transformation mechanism of all-inorganic Cs-Pb-Br perovskites for photonics/electronics device applications.
研究领域:
材料科学
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纳米光学
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半导体物理
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光电材料
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固态化学
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器件物理
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功能材料
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产品关联
DOI
高影响因子
Soft Matter
·
2017
·Vol. 13
·期 20
·3783-3788
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IF 3.889
Dongfang Liu,Yuxin Suo,Jiang Tan,Hongsheng Lu
At present, more and more researchers around the world are paying attention to stimuli-responsive surfactants. In this paper, we have reported a microemulsion prepared from the tertiary amine TMPDA (N,N,N′,N′-tetramethyl-1,3-propanediamine) and the anionic surfactant SDS (sodium dodecyl sulphate), which has good carbon dioxide response characteristics. The molar ratio of TMPDA to SDS is 1 : 2. By introducing CO2 into the microemulsion that consists of SDS, TMPDA, n-hexane, n-butanol and water, the tertiary amine TMPDA molecules can be protonated to form quaternary ammonium species. The protonated tertiary amine TMPDA can be assembled with SDS by electrostatic interactions to form a pseudogemini surfactant (SDS–TMPDA–SDS). The pseudogemini surfactant can dissolve in the aqueous phase which makes the microemulsion break down eventually. By bubbling N2 after CO2 into the same system at 50 °C for 3 hours, the pseudogemini surfactant SDS–TMPDA–SDS disintegrates into SDS and TMPDA, respectively. At the same time, the microemulsion also recovers its initial state. Such a reversible transition could be repeated for several cycles from monophase to complete phase separation.
研究领域:
化学
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材料科学
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DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-10
·
IF 16.6
Du Wei,Gao Feng,Cui Peng,Yu Zhiwu,Tong Wei,Wang Jihao,Ren Zhuang,Song Chuang,Xu Jiaying,Ma Haifeng,Dang Liyun,Zhang Di,Lu Qingyou,Jiang Jun,Wang Junfeng,Pi Li,Sheng Zhigao,Lu Qingyi
The reversible transformation of a nanohelix is one of the most exquisite and important phenomena in nature. However, nanomaterials usually fail to twist into helical crystals. Considering the irreversibility of the previously studied twisting forces, the reverse process (untwisting) is more difficult to achieve, let alone the retwisting of the untwisted crystalline nanohelices. Herein, we report a new reciprocal effect between molecular geometry and crystal structure which triggers a twisting-untwisting-retwisting cycle for tri-cobalt salicylate hydroxide hexahydrate. The twisting force stems from competition between the condensation reaction and stacking process, different from the previously reported twisting mechanisms. The resulting distinct nanohelices give rise to unusual structure elasticity, as reflected in the reversible change of crystal lattice parameters and the mutual transformation between the nanowires and nanohelices. This study proposes a fresh concept for designing reversible processes and brings a new perspective in crystallography.
研究领域:
纳米材料
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晶体学
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材料科学
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化学
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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）