ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 6
·2308608
·
IF 19
Wenbin Chen,Airi N. Kato,Lijun Dai,Paul S. Clegg,Tao Li
As a new class of soft materials, continuous emulsion channels have been successfully stabilized solely by rough colloids, which exhibit unique capability in sterically controlling liquid–liquid interfaces. Once jammed at the interface, the roughness-enhanced frictions can slow down the dynamics of phase separation, and the interlocking behaviors would constrain their relative motions and generate force structures that provide mechanical support for the created emulsions. Ethanol is used to ensure the particles’ absorption, whose migration can modify the interfacial tension, and increase the solubility of active ingredients (e.g., curcumin). Applying rough colloids in ethanol-containing systems opens new pathways toward the generation of novel structures and materials, where the parallel but separate functionalities provided by various phases demonstrate wide-ranging applications, especially in delivery systems with variably soluble components.
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LAB ON A CHIP
·
2023
·Vol. 23
·期 20
·4390-4399
·
IF 6.1
Jienan Shen,Jiaqi Liao,Huiying Liu,Chunyan Liu,Chonghao Li,Hao Cheng,Hui Yang,Hong Chen
The occurrence, development and prediction of various biological processes and diseases are inseparable from the protein–protein interaction (PPI), so it is extremely meaningful to perfect PPI networks. However, shortcomings of traditional detection methods, such as protein degradation, long detection time, complex operation, poor automation and high cost, restrict the rapid development of PPI networks. Here, a low-temperature digital microfluidic (LTDMF) system-based PPI detection box (LTDMF-PPI-Box) was developed to achieve rapid, lossless and efficient PPI detection. It consists of a PMMA shell, LTDMF-PPI and an integrated temperature control system. LTDMF reduces the PPI detection time from tens of hours to 1.5 hours by programmatically controlling the movement of droplets. Moreover, an integrated thermoelectric cooler (TEC) ensures an operating temperature of 4 °C, resulting in a protein protection up to 90%. The interaction between RILP protein and Rab26 protein which has a close connection to insulin secretion was demonstrated as a prototype to illustrate the feasibility of the LTDMF-PPI-Box. LTDMF with automation characteristics is capable of meeting the requirement of high-throughput screening of interacting proteins; therefore, the LTDMF-PPI-Box is expected to accelerate the establishment of the PPI network in the future.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ying-Ming Li,Wen-Juan Hu,Shuang-Lin Hu,Yi-Ran Li,De-Yi Wang
Organic aerogels take the advantages of low density, regulatable flame retardancy, excellent thermal insulation and high mechanical property, which showing an innovative strategy to endow the rigid polyurethane foam with enhanced the flame retardance, mechanical property and thermal insulation performance. Hence, in this work, an innovative strategy was developed to design organic aerogels via the polyvinyl alcohol (PVA) and adenosine triphosphate endowing the RPUF with simultaneously super thermal insulation, enhanced compressive strength , flame retardancy and smoke suppression. The compressive strength of RPUF/PVA-ATP 7 composite was 338 kPa, which was 74.2% higher than that of RPUF. It should be noted that the thermal conductivity of RPUF/PVA-ATP 7 was only 0.020 W/(m·K), which being lower than that of air and showing the characteristic of supper insulating materials. For the RPUF/PVA-ATP 5 and RPUF/PVA-ATP 7 composites, both passed the UL-94V-0 rating with a LOI of 30.0% and 36.5%. Meanwhile, the peak heat release rate (PHRR) and the peak of CO production (PCOP) of RPUF/PVA-ATP 7 composites effectively reduced by 40.7% and 61.6% respectively comparing to that of RPUF. Moreover, it was concluded that the condensed phase mechanism dominated for the RPUF/PVA-ATP 7 composites.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuhan Guo,Minglong Yan,Wenjie Zhao
Marine biofouling caused a number of questions about energy consumption and safety. While there were still some challenges in developing an environmentally friendly, non-toxic and long-term antifouling slippery liquid-infused porous surface (SLIPS). Here, we proposed a difunctional antifouling strategy via constructing porous polydimethylsiloxane (PDMS) surface with a layer of aerogel by sol-gel method and grafted cinnamaldehyde chemically. The improvement in structure enhanced the liquid storage stability of coating, which in turn increases its anti-bioadhesive ability. In addition, the grafted cinnamaldehyde could also be used to act as a chemical antibacterial and is intelligently released in the face of harsh fouling environments, which played a key role in prolonging the antibacterial lifespan of the coating. After the 120-hour anti-bacteria experiment and the 25-day anti-algae experiment, the anti- Escherichia coli (anti- E. coli ) rate and the anti-algae rate of the coating reached 99.6% and 99.9%, respectively, which was attributed to the excellent long-term antifouling properties of the coating. The combination of physical and chemical antifouling property made the coating achieve long-term fouling prevention for marine engineering equipment.
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Advanced Science
·
2023
·Vol. 10
·期 19
·2301214
·
IF 15.1
Peng Zhang,Zhaowei Teng,Lei Zhao,Zhichao Liu,Xue Yu,Xiaodie Zhu,Songcheng Peng,Ting Wang,Jianbei Qiu,Qingyuan Wang,Xuhui Xu
Mechanical sensors execute multi-mode response to external force, which are cornerstones for applications in human–machine interactions and smart wearable equipments. Nevertheless, an integrated sensor responding to mechanical stimulation variables and providing the information of the corresponding signals, as velocity, direction, and stress distribution, remains a challenge. Herein, a Nafion@Ag@ZnS/polydimethylsiloxanes (PDMS) composite sensor is explored, which realizes the description of mechanical action via optics and electronics signals simultaneously. Combined with the mechano-luminescence (ML) originated from ZnS/PDMS and the flexoelectric-like effect of Nafion@Ag, the corresponding explored sensor achieves the detection of magnitude, direction, velocity, mode of mechanical stimulation, and the visualization of the stress distribution. Moreover, the outstanding cyclic stability, linearity response character, and rapid response time are demonstrated. Accordingly, the intelligent recognition and manipulation of a target are realized, which indicate a smarter human–machine interface sensing applied for wearable devices and mechanical arms can be expected.
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2021
·Vol. 104
·期 8
·3855-3861
·
IF 3.784
Jun Chen,Wan-Qing Xue,Chang-Ming Xu,Pai-Feng Luo,Ji-Gui Cheng,Ying-Wei Lu
Monodisperse ZrO 2 ceramic beads with size larger than 1 mm have been prepared by an improved micro-droplet spray forming process, through which a compressor and a dispenser were employed to produce droplets continuously. Furthermore, the slurry recipe and drying temperature have been optimized to enhance the sphericity and smoothness of the beads. The sintered ZrO 2 ceramic beads present promising mechanical performance, including a relative density of 84.6%, a crush strength of 256.2 ± 36.6 N as well as a Vickers hardness of 1344.4 ± 58.3 HV. Such procedure reveals great potential in mass production of ceramic beads.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Lü Yuling,Wang Yingying,Wang Shipeng,He Limin,Ye Tianxu
Due to the oil field development enters the period of high water cut, the flow drag of oil-water two-phase flow in nonmetallic pipes requires further research. Moreover the dynamic spreading behavior of oil droplet on a pipe’s wall is of great significance to investigate the flow drag. However, the spreading behaviors of oil droplets on surfaces with different wettabilities in water system are still not clear. In this study, firstly, considering the effect of surface wettability and oil droplet diameter, the spreading behaviors of oil droplets on non-metallic and metallic substrates were observed using a high-speed imaging system. Then, according to the spreading behaviors of oil droplets on the substrates and based upon the energy balance theory, a theoretical model of the spreading behavior of oil droplets was developed for predicting the dimensionless maximum spreading diameter. The quantitative relationships among the dimensionless maximum spreading diameter, the diameter of oil droplets, the properties of oil and water, and the wettabilities of surfaces were obtained. Finally, the theoretical model was verified using experimental data with deviations generally ranging within ± 10%.
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CARBON
·
2021
·
IF 9.594
Pengfei Liu,Xiaofeng Li,Xiyuan Chang,Peng Min,Chao Shu,Yongji Li,Yu Kang,Zhong-Zhen Yu
Anisotropic graphene aerogels (GAs) are usually fabricated by unidirectional-freezing with graphene oxide (GO) dispersion as the precursor. However, polymer additives or pre-gelation are usually required to enhance the anisotropic architectures, which often cause attenuations in electrical conductivity and shape control accuracy. Herein, we demonstrate a calcium ion-assisted unidirectional-freezing approach for fabricating highly anisotropic GAs by unidirectionally freezing aqueous suspensions of GO with a trace amount of calcium ions, followed by freeze-drying and thermal reduction. The calcium ions could slightly crosslink GO sheets by coordination, and hence reduce the interaction between GO sheets and in situ grown ice pillars, benefiting vertical alignment of the GO sheets. After freeze-drying to sublime these ice pillars, high-temperature annealing is adopted to thermally reduce the anisotropic GO aerogels by removing their oxygen-containing groups, resulting in highly anisotropic GAs. The lightweight and anisotropic GA exhibits excellent sensitivity and durable reversibility as a piezoresistive sensor because of its highly aligned porous architecture. Furthermore, GA exhibits prominent adsorption capacity for many organic pollutants from wastewaters. Interestingly, the vertically aligned porous structure of GA enhances its solar-light absorption and solar-thermal energy conversion, making GA efficient in decreasing the viscosity of crude oil and thus enhancing its adsorption capacity .
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Small
·
2021
·Vol. 17
·期 8
·2007803
·
IF 13.281
Xinsheng Wang,Haoyu Bai,Jingrun Yang,Zhe Li,Yuchen Wu,Cunming Yu,Lei Jiang,Moyuan Cao
Lubricant-infused slippery surface exhibits a series of superior properties such as pressure tolerance, self-healing, oil-repellence, etc. Especially when being applied in an aqueous environment, the reliable bubble manipulating ability of slippery surface offers great opportunities to develop advanced systems in the field of gas transport, water splitting, etc. To improve the strength and the functionality of slippery surfaces, a sliced lubricant-infused slippery (SLIS) track is presented here, possessing both flexibility and toughness for underwater bubble manipulation. The rigid slippery slices with hydrophobic porous structure are linked by the liquid bridge of silicone oil, resulting in a continuous lubricant layer for bubble transfer. Taking advantage of this unique assembled structure, the in situ bubble controlling process, that is, pinning and moving, is achieved via the stretching/releasing of an elastic SLIS track. Besides, on the basis of the integrated design, a hypothesis of underwater gas mining is proved in the all-in-one process including the micro-bubble generation, bubble collection, and gas transport. The current design paves an avenue to reinforce the structure of slippery surfaces, and should promote the function of underwater bubble manipulation toward real-world applications.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xu Zhu,Jianqiang Zhang,Lei Zhu,Ran Wang,Shang Gan,Jinwei Xue,Xilu Liu,Hui Li,Qingzhong Xue
Plastic pollution and oily wastewater discharge are the main factors which threaten the ecological environment, and the controlling of the two kinds of pollution consumes a lot of resources. From the perspectives of pollution treatment and saving resources, using solid waste (plastic waste) to treat liquid waste (emulsion) may have economic and environmental protection benefits. Here, a negatively charged hydrogel-coated recycled wet wipe (RWW-NH) is prepared by spraying and crosslinking process, which will be applied in cationic surfactant-contained oily wastewater treatment. The negatively charged hydrogel coating can absorb CTAB molecules, and the recycled wet wipe serving as the porous architecture can promote the coalescence of oil droplets. The obtained composite membrane has superior separation performance for CTAB stabilized emulsion, and the membrane with double layers can continuously separate 4000 mL emulsion with a permeation flux of 3057 L m −2 h −1 . Besides, RWW-NH can absorb cationic dyes and heavy metal ions, due to the negative charges and high-density phosphate groups of the coating, respectively. The as-prepared composite membrane with low cost and simple preparation process has both environmental and economic values, which provides a prospective application in environmental treatment.
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ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Haiyang Yu,Zheng Zhao,Bichen Xiao,Minghua Deng,Zhaoliang Wang,Ziqin Li,Huibin Zhang,Lei Zhang,Jingwen Qian,Jinhua Li
Thrombin is an important biomarker for various diseases and biochemical reactions. Rapid and real-time detection of thrombin that quickly neutralizes in early coagulation in the body has gained significant attention for its practical applications. Solution-gated graphene transistors (SGGTs) have been widely studied due to their higher sensitivity and low-cost fabrication for chemical and biological sensing applications. In this paper, the ssDNA aptamer with 29 bases was immobilized on the surface of the gate electrode to specifically recognize thrombin. The SGGT sensor achieved high sensitivity with a limit of detection (LOD) up to fM. The LOD was attributed to the amplification function of SGGTs and the suitable aptamer choice. The ssDNA configuration folding induced by thrombin molecules and the electropositivity of thrombin molecules could arouse the same electrical response of SGGTs, helping the device obtain a high sensitivity. The channel current variation of sensors had a good linear relationship with the logarithm of thrombin concentration in the range of 1 fM to 10 nM. The fabricated device also demonstrated a short response time to thrombin molecules, and the response time to the 1 fM thrombin molecules was about 150 s. In summary, the sensing strategy of aptamer-based SGGTs with high sensitivity and high selectivity has a good prospect in medical diagnosis.
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MOLECULES
·
2021
·Vol. 26
·期 19
·5974
·
IF 4.412
Iryna S. Protsak,Yevhenii M. Morozov,Dong Zhang,Volodymyr M. Gun’ko
The investigation of molecular interactions between a silica surface and organic/inorganic polymers is crucial for deeper understanding of the dominant mechanisms of surface functionalization. In this work, attachment of various depolymerized polydimethylsiloxanes (PDMS) of different chain lengths, affected by dimethyl carbonate (DMC), to silica nanoparticles pretreated at different temperatures has been studied using29Si,1H, and13C solid-state NMR spectroscopy. The results show that grafting of different modifier blends onto a preheated silica surface depends strongly on the specific surface area (SSA) linked to the silica nanoparticle size distributions affecting all textural characteristics. The pretreatment at 400 °C results in a greater degree of the modification of (i) A-150 (SSA = 150 m2/g) by PDMS-10/DMC and PDMS-1000/DMC blends; (ii) A-200 by PDMS-10/DMC and PDMS-100/DMC blends; and (iii) A-300 by PDMS-100/DMC and PDMS-1000/DMC blends. The spectral features observed using solid-state NMR spectroscopy suggest that the main surface products of the reactions of various depolymerized PDMS with pretreated nanosilica particles are the (CH3)3SiO-[(CH3)2SiO-]xfragments. The reactions occur with the siloxane bond breakage by DMC and replacing surface hydroxyls. Changes in the chemical shifts and line widths, as shown by solid-state NMR, provide novel information on the whole structure of functionalized nanosilica particles. This study highlights the major role of solid-state NMR spectroscopy for comprehensive characterization of functionalized solid surfaces.Keywords:silica nanohybrids;solid-state NMR;surface properties;polydimethylsiloxane;silica functionalization
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